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TENDER DOCUMENT(VOLUME-II)

(Scope of Works, Technical Specification, List of approved makes, Tender Drawings)

NIT NO. : NRO/CON/MANIKTALA-PG/491

RENOVATION OFEXISTING EMPLOYEES STATE INSURANCE

(ESI) HOSPITAL AND PG COLLEGE AT MANIKTALA, KOLKATA, WEST BENGAL

ISSUED TO

________________________________

________________________________

ENGINEERING PROJECTS (INDIA) LIMITED SCOPE COMPLEX, CORE –III, LODHI ROAD,

NEW DELHI:110003

1. Introduction

1.1 Information about the site :

Renovation of Existing Employees State Insurance (ESI) Hospital and PG College at Maniktala, Kolkata, West Bengal

1.2 SCOPE OF WORK

The brief scope of work included in this tender shall include (but not limited to) the following:

a) Repair to internal plasteringb) Applying plaster of Paris on existing walls to provide smooth finish.c) Applying washable distemper/Plastic Paint to internal walls.d) Repair to internal wooden doors.e) Applying synthetic enamel paint on wooden & steel membersf) Replacing damaged wooden toilet doors with PVC door shuttersg) Providing ceramic tiles flooring.h) Renovation of toilet with ceramic tiles on walls and floors.i) Renewing damaged toilet fittings.j) Renewing damaged GI water supply lines.k) Replacing entire wooden windows with steel windows.l) Renewing damaged soil pipe line.

m) Renovation of kitchen with ceramic tiles on walls, and floors.n) Providing marble stone kitchen platform and stainless steel sink.o) Providing wooden shutters to open shelves.p) Providing Drapery/Curtain rods over windows.q) Kota stone flooring in staircase, landing and common area/lobby.r) Ceramic wall tiles in dado of staircase.

GENERAL TECHNICAL SPECIFICATION :

2.0 GENERAL SPECIFICATION2.1The work in general shall be carried out as per CPWD specifications, 1996

(volume I to VI) (updated with correction slips issued up to last date of

submission of tender) and text of revised CPWD specifications for cement

mortar, cement concrete and RCC works, 2002 unless otherwise specified in

the nomenclature of the individual item or in the particular specifications for civil

works and CPWD specifications, 1994 for Electrical works (Internal) and 1995

for Electrical works (External) (updated with correction slips issued up to last

date of submission of tender).

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2.2 All Electrical installation shall comply with the requirements of Indian

Electricity rules, 1956 and Indian Electricity Act-1910 as amended up to date

and bye laws of authority of State Government or any other department.

2.3 All mechanical works related to Public Health Engineering will conform to

the requirements of manual of Water Supply by the Ministry of Urban

Development and various Indian Standards as listed there-in.

2.4 All electrical works will conform to various Indian Codes as listed in the

Technical Specifications.

2.5 For the items not covered under the specifications as stated above, the

work shall be done as per relevant IS Codes.

2.6 For the items not covered under any of the specifications stated above, the

work shall be executed as per Manufacturer’s specifications/ General

Engineering Practice and / or as per direction of Engineer in Charge.

2.7 ADDITIONAL PARTICULAR SPECIFICATIONIn the absence of any definite provisions or any particular issue in the aforesaid

specification, reference to be made to the latest codes and specifications of

BIS, IRC, BS, ASTM, AASHTO and CAN/CAS in that order. Where even these

are silent, the construction and completion of works shall conform to sound

Engineering practice as approved by Engineer in Charge. In case of any

dispute arises out of the interpretation of the above, the decision of the

Engineer in charge shall be final and binding on the contractor.

Where ever reference is made in the contract to specific standard codes to be

met by the materials, plants and other supplies to be furnished and work

performed and tested, the latest edition or revision of the relevant codes in

effect shall apply, unless otherwise explicitly stated in the contract. Where such

standards and codes are national, or related to a particular country of region,

other internationally recognized standards which ensure a substantially equal

or higher performance than the standards and codes specified will be

accepted subject to the Engineer in charge prior review and written approval.

Differences between standards must be fully described in writing by the

contractor and submitted to the Engineer in Charge at least 15 days prior to the

date when contractor desires the Engineer in Charge‘s approval. If the

Engineer in Charge determines that such proposed deviation do not ensure

substantially equal performance, the contractor shall comply with the standards

specified in the documents.

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3. TECHNICAL SPECIFICATION FOR ELECTRICAL WORK

SCOPE

This specification covers supply of materials, fabrication, and erection, testing and commissioning of Electrical system as per BOQ. Applicable provisions and conditions of contract shall govern the work under the Section.

GENERAL

The power supply system in the building & retail outlet stations shall be made available at 415/240 Volts, 50 Hz., A.C. 3 phase 4 wire, earthed neutral from local Electric Supply Authority.

All supply and installation work shall be carried out as per specification and in accordance with the construction drawings and shall conform to requirements called for in the Indian Electricity Rules 1956 with its latest amendment, Indian Electricity Acts and all relevant codes and practices issued by the Bureau of Indian Standard as amended up-to-date. The work shall also comply with the provisions of the general or local set of legislatures and regulations of any local or other statutory authority which may be applicable.

The Contractor for electrical work must possess valid Electrical contractor's License endorsed by the Licensing Board, Directorate of Electricity of concerned State Government for the type of work he shall execute.

The work to be provided for by the Contractor, unless otherwise specified, shall include but not limited to the following :

i: Furnish all labour, supervision, services, materials, supports, scaffolds, construction equipment, tools, plants and transportation etc required for the proper execution of the job as per drawings, specification and schedule of items and get all necessary tests on materials and work conducted at their cost.

ii: Not withstanding the electrical layout shown in the drawing, the contractor shall obtain further approval of the layout at site from the Consultant / Engineer-in-Charge before commencement of the work.

iii: Furnish samples of materials on display board at site for approval including arranging necessary tests on samples, as directed by the Consultant / Engineer-in-Charge in an approved Laboratory.

iv: To extend facilities to the Consultant / Engineer-in-Charge to inspect work and assist them to obtain samples, if they so desire.

v: Furnish general arrangement drawings of the switchboard and other fabrication items, which the Consultant / Engineer-in-Charge may direct for their approval.

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vi: To employ a full time experienced supervisor having electrical supervisor's certificate of competency endorsed by the Licensing Board, Directorate of Electricity of concerned State to supervise the work. The Consultant / Engineer-in-Charge have the right to stop the work if the contractor's supervisor is not present when the work is being carried out.

vii: To keep the appropriate Electrical Inspector & supply authority be informed from time to time as per the execution programme of the work shall be the responsibility of the contractor and he shall be responsible to ensuring that all work passes their approval.

viii: To provide all incidental items not shown or specified in particular but necessary for proper execution of works in accordance with the drawing, specification and schedule of items.

ix: To maintain the work and keep them maintained till handed over to the owner in proper working condition.

x: Co-ordinate with all agencies including those engaged by the owner for proper execution of the job.

MATERIALS

Materials shall be of the approved make & quality. A list of materials of approved brand and manufacturer is indicated in the annexure. If the list of materials mentioned above stipulates two or more or alternative brands/makes of any product, the decision as to which brand/make shall be used in the work shall be taken by the Consultant/ Employer and the contractor shall provide the brand/make so selected without any extra cost.

In case, materials are required to be obtained from any manufacturer other than those listed on account of non-availability then prior approval from Consultant will be necessary, supported by relevant test certificates qualifying the required standard. Further tests as directed by the Consultant shall also be carried out by the contractor at their own cost, if required.

Contractor shall obtain approval from the Consultant/ Employer of sample of all materials before placing order and the approved sample shall be carefully preserved on the display board in an appropriate manner at the site office for verification by the Consultant/ Employer.

For standard bought out items, the sizes manufactured by the firms listed shall prevail when there is discrepancy in the sizes mentioned in the schedule without any financial adjustment.

SPECIFICATIONS

Unless specifically mentioned otherwise, all applicable codes and standards published by the Bureau of Indian Standard and all other such publication as may be published by them after construction work starts, shall govern in respect of design, workmanship, quality and properties of material and method of testing.

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SAFETY

All equipment shall be complete with approved safety devices wherever a potential hazard to personnel exists and with provision for safe access of personnel to and around equipment for operation and maintenance functions.

Special care shall be taken to ensure against entry of rats, lizards and other creeping reptiles which may create electrical short circuit inside live equipment.

DRAWINGS

On completion of all work the contractor shall furnish three copies of Ammonia print along with the original tracing of the following “As built” drawings to the Consultant without any extra cost.

I: Wiring diagram for final power / lighting distribution system showing the rating/ size of switchgear, cables, conduits, lighting fixtures and all accessories for individual installation.

ii Detailed general arrangement drawings of the switchboard complete with dimension in metric units.

iii Drawings showing the route of conduits and cables with sizes, lengths, sources and destination of all cables with the circuit designation number, etc.

iv Drawings showing the balancing of phases with connected load in each circuits, etc.

TEST CERTIFICATES AND INSTRUCTIONS

Unless specifically mentioned otherwise, the contractor shall furnish, in duplicate, Manufacturer's Test Certificate with the delivery of the equipment to the Consultant and Instruction Manual in English for operations and maintenance of equipment wherever required.

TESTING AND COMMISSIONING

Before each field test, the contractor shall obtain the permission from the site engineer and all tests shall be conducted in the presence of duly authorised representative. Records of each test shall be prepared immediately after the test and this record shall be signed by contractor's representative conducting the test and the site engineer attending the test. Copies of their record in quadruplicate shall be handed over to the Consultant/ Engineer-in-Charge.

A certificate in quadruplicate shall be furnished by the contractor countersigned by the certified supervisor under whose direct supervision the installation was carried out and the owner's site engineer. This certificate shall be in the prescribed forms in addition to the test certificate required by the Local Electric Supply Authorities. Recommended completion certificate’s Format is given in Appendix 'A'.

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COMPLETION OF WORK

Each item of the electrical work shall be considered as complete in all respects only after obtaining permanent service connection from local power supply authority, energising, testing and final commissioning of the complete installation as directed by the Consultant/Engineer-in-Charge.

Payment on each item of electrical work shall be made as per measurement and proportionate to the quantum of work completed. In the event of any dispute with regard to the proportion of work complete, the decision of the Consultant/ Engineer-in-Charge shall be final and binding to the contractor.

PREAMBLE TO THE SCHEDULE OF WORK

The successful tenderer shall carefully go through the Clauses of Invitation to Tender, Specification, Schedule of Work and drawings and shall include in his rates any sum he may consider necessary to cover the fulfillment of the various clauses contained therein. Unit prices stated in the schedule of work against the item of work shall be inclusive of all installation, accessories and consumables necessary to complete the said work within the contemplation of the contract. Beyond the unit prices no extra amount will be paid for incidental contingent work and materials.

The quantities mentioned in the schedule of work are probable quantities and it must be clearly understood that the contract is not a lump sum contract, that the probable quantities, the value of the entire tender are only indicative and Employer does not in any way assure the tenderer or guarantee that the actual quantity of work would correspond to the probable quantities in the tender.

No change in unit rate will be admissible on any variation of quantity.

TECHNICAL SPECIFICATION FOR WIRING SYSTEM

SCOPE

This specification covers supply of materials, erection and commissioning of distribution wiring, connection to distribution boards, cable laying, earthing and miscellaneous items. Applicable provisions and conditions of contract shall govern the work under the section.

GENERAL

Work to be provided for by the Contractor, unless otherwise specified, shall include but not be limited to the following:

i: Furnishing of labour, materials, supports, scaffolds, transportation, etc required for the work.

ii: To provide all incidental items not shown or specified in particular but reasonably be implied or necessary for successful completion of the work in connection with the drawings, specification and schedule of items.

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iii: To provide all supervision for proper execution of the work.

iv: To conduct and bear all costs in respect of any test advised.

After completion of supply and installation of wiring system and earthing, if any defect in the material or workmanship is found by the Consultant / Engineer-in-Charge, the contractor shall remove the same and supply better and approved materials at his own cost.

All precaution against theft and fire shall also be taken by the contractor.

MATERIALS

All materials used in the work shall be ISI approved quality and in its absence conforming to the IS Specification.

WIRING SYSTEM

The electric load of all lights, power outlets, etc. shall be balanced across the three phases.

Generally the final loading of any sub-circuit for lights and fans shall not exceed 800 watts and shall not be connected to more than total 10 fans, lights, socket outlets, etc. Bell push if operated at low voltage shall be fed from a separate circuit of distribution board.

The 16 Amps sub-circuit for power shall be connected to a maximum one 16 Amp. socket outlet or two 6 Amp. socket outlets.

A power circuit shall always be originating from a distribution board or MCB DB and the same shall run in a separate conduit.

The point wiring shall mean wiring from one way of distribution board to point of utilisation of electricity i.e. where the load is applied and this shall include complete wiring from distribution board, supply and fixing of switch board, controlling switches, ceiling rose, batten holder and socket outlet, etc.

Insulated or covered earthing conductors where used, shall have green insulation braiding or covering as appropriate. Under no circumstances shall the colour green be used for other than earthing conductor. In addition where it is required, cables of different colours be used. For identification purposes the following system shall be employed :

Red or any colour (other than black or green)

For phase or switch wire

Black For NeutralGreen For earth

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Unless otherwise mentioned in the schedule of quantities, single way porcelain/ bakelite terminal connectors with nickel plated brass inserts and screws to suit the conductor size shall be used for intermediate wiring/ joints in junction boxes and in switch boards or by any other method approved by the Consultant/ Engineer-in-Charge.

Distribution wiring in conduit to light, fan, plug points etc.shall be done in looping in system. In this system, no joints or connections shall be made anywhere of the system except at terminating points such as, at terminals of switches, ceiling roses, etc. and in case of socket outlets, at the socket terminals. Intermediate wiring joints of neutral wire in junction boxes will not be permitted.

In the looping back system of wiring on hard wood batten, the wiring shall be done without any junction or connector boxes on the line. All intermediate joints or connections shall be made in the switch board only. Intermediate wiring joints of neutral wire in the junction box will not be permitted.

CONDUIT WIRING

All conduit shall be ISI marked and finished with galvanised or stove enamelled surface. All conduit accessories shall be conforming to IS:2667-1988 and be threaded type. Conduit less than 20mm in diameter shall not be used. All conduits shall be 1.4 to 1.8 mm thickness below 32 mm dia. and 1.6 to 2.2 mm thickness for 32 mm dia. and above.The conduit for each circuit shall be erected complete with necessary bushes before drawing in of any wire. Galvanised M.S. Spacer of 3 mm thick minimum shall be used between the conduit saddle and fixing surface. The saddle shall be fixed at an interval of not more than 750 mm apart for vertical run and 600 mm apart for horizontal run.

The joint in conduits shall be made by means of threaded couplers and threaded accessories only to ensure electrical continuity throughout. All pipes after cutting, the threading shall be carefully reemed out with special reamer to remove any burr and then painted immediately with an anti-corrosive preservative after removing all traces of oil or grease. Junction boxes shall be provided with gasketed covers to render them dust and damp proof. The conduit accessories having pull outlet for conductors shall only be used in all conduit installation.

Where specified, P.V.C. conduit conforming to IS: 7537 (Part-III) shall be used. The thickness of P.V.C.conduit shall be adequate to withstand mechanical inju-ries. PVC conduit accessories conforming to IS: 3419-1976 shall be used along with P V C conduit.

The entire conduit system shall be effectively earthed by means of suitable earthing conductors and the resistance from any point to earth shall not be more than one OHM.

After installation of conduit pipes and fittings are completed in all respects, the exposed outer surfaces of the conduit and accessories shall be painted with two coats of approved enamel paints or aluminium paint over a coat of red oxide primer as required to match the surrounding wall finishing. To protect against rust the bare thread portion shall be painted with anti-corrosive preservative.

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CONCEALED WIRING

This system of wiring shall comply with all the requirements of surface conduit wiring system specified in Causes 5.1 to 5.6 in addition to the following points:

Making of chase : The chase in the wall shall be filled up neatly made and be of ample dimensions to permit the conduit to be fixed in the manner desired. In case of buildings under construction, chases shall be provided in the wall, ceiling etc. at the time of their construction and shall be filled up neatly after erection of conduit and brought to the original finish of the wall. Specially for ceiling, conduit shall be laid before casting.

Fixing of conduit in chase : The conduit in chase in the wall shall be fixed by means of staples or by means of saddles not more than 60 cm apart. Fixing of standard bends or elbows shall be avoided as far as practicable and all curves maintained by bending the conduit pipe itself with a long radius which will permit easy drawing of PVC insulated wires. All threaded joints of conduits shall be treated with some approved preservative compound to secure protection against rust.

Inspection boxes : Suitable inspection boxes shall be provided to permit periodical inspection and to facilitate removal of wires, if necessary. These shall be provided with inspection box covers.

Types of accessories to be used : All outlets, such as switches, wall sockets, etc. may be either flush mounting type or of surface mounting type.

The outlet box shall be mounted flush with the wall. The metal box shall be effectively earthed with conduit by an approved means of earth attachment.

Fish wire : 1 x 18 SWG G.I. wire inside the conduit and accessories to be provided with an extension of 250 mm at both the conduit ends.

Conduit laying in floor/ roof slabs before casting : M.S./ G.I./ rigid PVC (as specified in BOQ) shall be laid straight as far as practicable and properly placed including binding with the steel reinforcement rods with 22 SWG G.I. binding wire so that proper positions of conduits are maintained.

While laying the conduits for concealed wiring in the cealing / beams / columns / walls before casting, the contractor shall ensure that both ends of the conduit are plugged by means of dead-end sockets or otherwise to prevent the entry of any foreign material against conduit choking.

All precaution must be taken while laying the conduits in the slabs, R.C. walls, columns, etc. and the contractor shall rectify at his own cost, if any defects are found during process of drawing cables through the concealed prelaid conduits.

Each M.S. / G.I. conduit shall be provided with protruding length of 150 mm on free end of the conduits with sockets under the bottom level of slab/ beam.

Each rigid PVC conduit shall be provided with protruding length of 150 mm on free end of the conduits under the bottom level of slab/ beam.

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There shall be no intermediate joints in one straight run of conduit.

All ceiling outlets shall be terminated in a round M.S./ G.I. circular box (80 mm depth minimum)/ deep box to suit standard size ceiling rose or/ and rectangular M.S. junction box or Fan Hook Box as the case may be.

It will be mandatory for the contractor to get the layouts approved by the Engineer-in-charge/Consultant, measurements are checked when the conduits are laid and bound to steel reinforcement rods, before he can release the work for casting of slabs/ floor/ beams etc.

Connector Boxes, Draw-in-Box, Junction Boxes :

These shall be constructed from 16 SWG M.S. sheet and have M.S. cover. Minimum size for connector box is 150mm x 100mm and for Draw-in-Box is 100mm x 100mm with required depth upto 80mm.

Fan Hook Box : These shall be 100mm dia x 80mm depth, constructed from 14 SWG M.S. sheet and provided with one 12 mm dia. M.S. rod of 300mm long having 'U' bend inside the box.

Painting : Both inside & outside wall of switch board, connection box, draw-in-box and other M.S. accessories shall be painted with two coats of anti-corrosive paint in addition to other painting instructions given elsewhere.

WIRES

Unless otherwise mentioned in the schedule of quantities, only single core PVC insulated / PVC insulated & sheathed cable consisting of multistrand / flexible copper conductor and of approved manufacturers conforming to relevant I.S. shall be used for wiring in conduit system.

The maximum number of wires drawn in one conduit shall not be greater than the recommended number given in the Table – 1 given in this section.

P V C INSULATED WIRING LAID ON HARD WOOD BATTEN

Unless otherwise mentioned in the schedule of quantities only single core PVC insulated wire of 1100 volts grade consisting of multistrand copper conductor conforming to I S :694 shall be used for exposed batten wiring.

All P V C wires shall run on well seasoned perfectly straight hard wood battenvarnished on four sides but not less than 10mm finished thick and the width of which is such as to suit total width of cables laid on batten. Prior to the erection, these shall be painted with one coat of varnish. The battens shall be screwed to the walls and ceiling by flat head wood screws to wood plugs or other approved plugs at an interval not exceeding 750mm. The flat head wood screws shall be counter sunk within wood batten and smoothened down with a file.

Link clips shall be conforming to IS:2412-1975 and these shall be so arranged that one single clip shall not hold more than four single core P V C insulated wire upto 2.5 sq. mm, above which a single clip shall hold two single core wire. The clips shall be fixed on varnished wood batten with brass pins

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spaced at intervals of 100mm in the case of horizontal runs and 150 mm in the case of vertical runs. The link clips shall be made of heavy tinned brass sheet or Aluminium sheet, the thickness being not less than 27 gauge.

Where wires pass through walls/floors these shall be protected from mechanical injury by means of rigid steel conduit. The end of the conduit shall be neatly bushed with bakelite. The conduit shall extent 1.5 mm above the floor and flush with the ceilings or walls.

After erection, the P. V. C. wiring along the batten shall be painted with one coat of synthetic enamel paint of an approved colour.

INSTALLATION AND WIRING OF DISTRIBUTION BOARD/ MCB DISTRIBUTION BOARD.

Where fixing of distribution board/ MCB DB on double teak wood board is specified only hinged type wooden board with brass hinge shall be provided and the size of the board shall be such as to match the size of the Distribution board/ MCB DB. A minimum margin of 25 mm shall be provided on all sides of the distribution board/ MCB DB. The outgoing circuit shall be taken out through a horizontal slot at the rear side of the distribution board/ MCB DB enclosure.

Where fixing of Distribution board/ MCB DB on M.S. frame is specified, the frame shall have sufficient mechanical strength to carry the weight of the DB./ MCB DB.

Where fixing of Distribution board/ MCB DB will be of concealed type, the chase in the wall shall be neatly made and be of ample dimensions to permit the DB to be recessed in wall and flushed with finished wall surface.

The cable / wires shall be connected to the terminal only by soldered or crimped lugs, unless the terminal is of such a form that it is possible to securely clamp them without cutting away of cable strands.

All bare conductors shall be rigidly fixed in such a manner that a clearance of at least 25 mm is maintained between conductors and material other than insulating material.

EARTHING

All non current carrying metallic part of various electrical equipments as well as cable armouring, metallic conduit, cable racks/ trays, brackets, supporting structures, etc. shall be effectively earthed by not less than two separate and distinct earth connection in accordance with Indian Electricity Rules, and the relevant Indian Code of Practice for earthing 3043-1987.

EARTH ELECTRODE

PIPE ELECTRODE

The earth electrode for earthing station shall comprise G.I. pipe 'B' Class of 50mm internal diameter and 3 Mtr long in one single piece with holes 12mm dia on all sides at 150 mm centre, upto a minimum height of 2.5 metre from

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bottom. Removable caps / wire mesh funnel shall be provided at the top of pipe to facilitate pouring of water. Suitable clamps made of 40mm x 6mm galvanised M.S. flats complete with bolt and nut shall be provided with the electrodes at 100 mm from the top end for connecting earth conductor. No joints will be allowed in the earth electrode. The electrode shall be driven at least 2 metre clear from masonry structure and the distance between two electrode shall be not less than 2 metre when installed in parallel and preferably placed twice the length of the electrode i.e. 6 metre. A masonry inspection pit of inside dimension 300mm x 300mm x 300mm deep (unless otherwise stated) shall be built with 125 mm thick cement mortar (6:1) brick work both inside and outside plastered with 20mm thick and neatly cemented 1.5 mm thick, inside top and outside around the top of the earth pit, so that the top of the G.I. pipe is 250 m below the finished ground level and the opening on top shall be provided with C.I. manhole ring having lockable C.I. cover fixed & flush with the outside finished ground level.

PLATE ELECTRODE

Where plate electrode for earthing is to be employed, the size of the plate shall not be less than 600 mm x 600 mm x 6.3 mm for G.I. plate in thickness and 600 mm x 600 mm x 3.15 mm thickness in case of copper plate.

The plate shall have a drilled hole 14 mm dia. at the centre. The G.I. flat of not less than 40 mm x 6 mm (1 no. 25 mm x 6 mm G.I. flat for lightning conductor installation) should be connected to the plate by means of a 65 mm long 12 mm dia galv. bolt, double nuts using double galv. washers. In case of copper plate, copper flat of not less than 25 mm x 6.0 mm shall be used as the earth lead. The flat shall first be fastened on one side of the plate, leaving adequate length of flat, which shall be taken over to the other side i.e. to the earth busbar, switchboard, pole, continuous earth wire for O.H. line, service bracket, lightning arrestor or the object to be earthed and be fastened as per the details of IS:3043-1987. No joint on the earth lead conductor is permitted. Every care shall be taken to ensure that the ends of the wire/ flats have been securely clamped by the bolt on cleaned surface of the plate and establish a good electrical contact.

The plate shall be buried vertically at a minimum of 3.6 M below the ground level for sandy soil and 2.0 m below the ground level for normal soil. In order to place the same at the prescribed depth, the dimension of pit to be excavated shall be 900 mm x 900 mm x 4 m deep. The G.I. plate shall be placed in position by the contractor only after the inspection of excavated pit and approval is obtained from the Consultant/ Employer.

After placing the plate the earth lead conductor shall be protected by means of a continuous length of G.I. pipe (Class B) having 50 mm dia (minimum) bore or route depending upon the size of the lead, right from the plate upto a height of 600 mm metre (2 ft.) above ground level. The whole length of pipe shall be filled with bituminous compound of approved make and brand. The molten compound shall be poured from the top end of the pipe and topped upto overflowing.

A masonry inspection pit for the earth station of inside dimension approximately 300 mm x 300 mm x 300 mm depth (unless otherwise stated) shall be built with 125 mm thick cement morter (6:1) brick work with 1st class bricks, both inside and outside plastered with 20 mm thick and neatly cemented 1.5 mm thick,

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inside, top and outside around the top of the earth pit. The opening on top shall be provided with C.I. manhole ring having lockable C.I. cover fixed and flush with the outside finished ground level.

Electrodes shall be buried at least 2 metre away from masonry structure/ building/ pole or object to be earthed. However, earthing electrodes for L.C. installations should be as close to the down conductors as possible. Electrodes when installed in parallel, shall not be placed less than 2 metre apart and preferably placed at distance greater than 6 metres.

All the excavations shall be duly back filled, dressed and rammed.

EARTH BUSBAR

GALVANISED M.S. FLAT

Unless otherwise specified in the schedule of quantities, the earth busbars shall be of heavily galvanised M.S. Flat of cross section 50mm x 6mm having adequate number of drilled holes with 10mm galvanised steel bolts, nuts, plain and spring washers for securely connected the earth leads and the continuity of conductor. The busbar shall be fixed on wall, having clearance of 6mm from wall with spacing insulators with 13mm dia G.I. rag bolts, spaced about 50mm apart.

COPPER FLAT

To be used, as specified in the schedule of items, where earthing requirements are more stringent, with use of brass bolts, nuts, washers for connections.

EARTH LEAD CONDUCTOR

The earth lead for each electrode shall be 7/10 S W G stranded G.I. wire connected securely to the earth electrode and earth busbar. The earth lead shall be mechanically protected with a continuous length of 25mm dia G.I. Pipe (Class 'B') right from the electrode to the earth busbar and the pipe shall be filled with bituminous compound.

Galvanised M.S. Flat earth conductor directly buried in ground shall generally be taken at a depth of 600 mm and shall be provided with one coat of bituminized paint, one layer of half lapped bituminized tape and a final coat of bituminized paint to prevent corrosion.

The earth conductor when laid inside building/ sub-station shall be taken either exposed on cable racks/ trays, walls, ceiling, etc. or embedded in concrete depending on installation. Galvanised M.S. saddles clamped to M. S. flat spacers with tapped holes shall be used for clamping earth conductor. Flats shall be supported at intervals not exceeding 500 mm and stranded wires at intervals of 300mm.

Connection of earthing leads to earth electrodes and termination of flat earth continuity conductor to equipment shall be made by means of bolting. Connection of stranded earth wire to earth bus as well as to equipment shall be made through crimping type lugs and bolting. Jointing and tapping of flat earth conductor shall be done by means of welding.

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The earth resistance from any point of the earthing system shall not be more than one ohm.

WORKMANSHIP AND INSTALLATION WORK

The workmanship shall be of good commercial quality and all supply material and installation work shall be completed to the full satisfaction of the Consultant/ Engineer-in-Charge.

CEILING FANS AND REGULATORS

The ceiling fans and regulators shall conform to IS: 374-1979. The fans shall have totally enclosed capacitor start and run motors suitable for operation on 230/ 240 Volt, single phase, 50 Hz. A. C. system. The regulator shall have an 'ON' -'OFF' position next to the lowest speed contact and shall be provided with at least five running positions.

EXHAUST FANS

The Exhaust fans shall conform to IS:2312-1967 and suitable for operation on 230/ 240 Volt single phase. 50 Hz. A.C. system. The fans shall be ring mounted type designed to give maximum air volume changes under free air flow conditions.

SWITCHES

Light and fan switches shall be rated for 6 amp. 250 volts and of Piano-key type and suitable for flush mounting on sheet steel board with moulded bakelite cover (manufactured by switch manufacturer). The switches shall be of approved make & acceptable to the Consultant/ Engineer-in-Charge. The switches shall comply with relevant I.S.

SOCKET OUTLET AND PLUG

These shall be of 3 pin type and of rating 6 amps (for light) and 16 amps. (for power). Each socket outlet shall be complete with controlling switch and plug top. Protective fuse links shall be provided with 16 amps. power socket outlet. The socket outlets shall have piano-key type switches of approved make and acceptable to the Consultant / Engineer-in-Charge. The socket outlet and plug shall comply with the relevant I.S. specifications.

SWITCH BOXES

Sheet metal (16 SWG) switch boxes/ connection boxes with 3 mm thick bakelite top cover flushed in wall by housing the box after cutting brick wall. Sheet metal boxes shall be treated against corrosion by passivation or other approved method.

TUBULAR POLE/G.I. PIPE POLES

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Where tubular steel pole are specified (either swagged or stepped), the same should be manufactured and supplied as per I.S. 2713 part I to III - 1980. Where G.I. pipe pole are specified the same should be approved to I.S.

LOOP-IN JUNCTION BOX

The junction boxes shall be drip proof type dust and verminproof construction fabricated from 2mm thick sheet steel having internal dimensions of 200 x 150 x 130mm depth for single phase distribution system and 250 x 200 x 130 mm depth for three phase distribution system. These shall have moulded bakelite base connector block with anti-vibration nickel plated brass terminals of suitable size and rating and porcelain fuse fittings.

MANUFACTURER'S DRAWING

The successful tenderer shall submit for approval General arrangement and dimensioned drawings for Power and Lighting distribution switch board, Motor Control centre, Bus-duct arrangement, Miniature circuit breaker distribution board, Distribution board, Interlocked Switch socket outlets, Clock switch control panel, T P Power Cable junction box and cable rack etc. as required in three sets before commencing manufacture. WORKMANSHIP AND INSTALLATION WORK

The workmanship shall be of good commercial quality and all supply materials and installation work shall be completed to the full satisfaction of the Consultant/ Engineer-in-Charge.

CONTRACTORS RATE TO INCLUDE

Apart from other factors mentioned elsewhere in this contract, the rates for the above shall include for the following :

i: All labour, materials, tools and construction equipment required for fabricating and fixing of above stated items. ii: Scaffolding including erection and removal. iii: Making good of all damaged civil work, if any.iv: Necessary modification of pre-laid conduit including supply & fixing of Metal/ PVC conduits and accessories, chase cutting, etc. as required to complete the work.

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3. TECHNICAL SPECIFICATION FOR SANITARY FIXTURES

1.0 SCOPE OF WORK :

1.1 Work under this section shall consist of furnishing all material and labour necessary and required to completely install all sanitary fixtures, chromium plated fittings and accessories as required by the drawings specified hereinafter and given in the Schedule of Quantities.

1.2 Without restricting to the generality of the foregoing the sanitary fixtures & C.P. fittings shall include the following:

a) Sanitary fixturesb) Chromium plated fittingsc) Stainless steel sinksd) Accessories e.g toilet paper holders, coat hook, dispenser etc. e) Mirror

1.3 Whether specifically mentioned or not all fixtures and appliances shall be provided with all fixing devices, nuts, bolts, screws, hangers as required.

1.4 All exposed pipes within toilets and near fixtures shall be chromium plated brass or copper unless otherwise specified.

2.0 GENERAL REQUIREMENTS:

2.1 All materials shall be new and of best quality confirming to specification and subject to the approval of the Architect/Consultants. Wherever particular makes are mentioned, the choice of selection shall remain with the Owner/Architect.

2.2 Sanitary fixtures shall be of the best quality approved by the Owner/Architect. Wherever particular makes are mentioned, the choice of selection shall remain with the Owner/Architect.

2.3 All Appliances, fixtures and fittings shall be provided with all such accessories as are required to complete the item in working condition whether specifically mentioned or not in the Schedule of Quantities, specifications, drawings. Accessories shall include proper fixing arrangement, brackets, nuts, bolts, screws and required connection pieces.

2.4 Fixing screws shall be half round head chromium plated brass screws with C.P. washers where necessary.

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2.5 Porcelain sanitary ware shall be glazed vitreous china of first quality free from warps, cracks and glazing defects confirming to I.S. 2556.

2.6 Sinks for pantry or kitchen shall be stainless steel or as specified in the schedule of quantities.

2.7 Chromium plated fittings shall be cast brass chromium plated of the best quality approved by the Owner/Architects.

2.8 All Appliances, fittings and fixtures shall be fixed in a neat workmanlike manner true to level and heights shown on the drawings and in accordance with the manufacturers recommendations. Care shall be taken to fix all inlet and outlet pipes at correct positions. Faulty locations shall be made good and any damage to the finished floor, Filing Plaster, Paint, insulation or terrace shall be made good by the Contractor at his own cost.

2.9 Sanitary appliances, subject to the type of appliance and specific requirements, shall be fixed in accordance with the relevant standards and the following :

a) Contractor shall, during the entire period of installation and afterwards protect the appliances by providing suitable cover or any other protection so as to absolutely prevent any damage to the appliances until handing over. (The original protective wrapping shall be left in position for as long as possible).

b) The appliance shall be fixed in a manner such that it will facilitate subsequent removal if necessary.

c) All appliances shall be securely fixed. Manufacturers’ brackets and fixing methods shall be used wherever possible. Compatible rust- proofed fixings shall be used. Fixing shall be done in a manner that minimizes noise transmission.

d) Pipe connections shall be made with demountable unions. Pipe work shall not be fixed in a manner that it supports or partially supports an appliance.

e) Appliances shall be fixed so that water falls to the outlet.

f) Appliances shall be fixed true to level firmly fixed to anchor or supports provided by the manufacturer and additional anchors or supports where necessary.

2.10 Sizes of Sanitary fixtures given in the Specifications or in the Schedule of Quantities are for identification with reference to the catalogues of makes considered. Dimensions of similar models of other makes may vary within + 10% and the same shall be provided and no claim for extra payment shall be entertained nor shall any payment be deducted on this account.

3.0 EUROPEAN WATER CLOSET:

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a) WC shall be single or double siphonic wash down type floor/ wall mounted set, as shown in the drawings, flushed by means of a flushing cistern.

b) Each W.C. set shall be provided with a solid plastic seat of colour given in the schedule of quantities, rubber buffers and chromium plated hinges. Plastic seat shall be so fixed that it remains absolutely stationary in vertical position without falling down on the W.C.

c) Flush pipe/bend shall be connected to the Water Closet by means of suitable rubber adapter.

d) Wall hung Water Closet shall be supported by C.I. chair.

4.0 URINALS:

4.1 Urinals shall be lipped type half stall white glazed vitreous china of best quality and size as mentioned in the Schedule of Quantities.

4.2 Half stall urinals shall be provided with 15 mm dia C.P. spreader, 32

mm dia C.P. domical waste and C.P.cast brass bottle trap with pipe and wall flange and shall be fixed to wall by C.I. brackets, C.I. wall clips and CP brass screws as recommended by manufacturer complete as directed by Architect/Consultants.

4.3 Flushing for urinals shall be by means of no hand operation, infra-red electric flush valve with complete kit of plumbing, infra-red photo cells, solenoid valve. The automatic flush sensor plate shall be flush and press fitted and be of high quality mirror polish finish. Each urinal shall be provided with one flush valve unit.

4.4 Flush pipes shall be GI pipes concealed in wall chase but with chromium plated bends at inlet and outlet or as given in Schedule of Quantities. These shall be measured and paid for separately.

4.5 GI waste pipes shall be provided for urinals wash basin, sink.

5.0 URINAL PARTITIONS:

5.1 Urinal partitions shall be white glazed vitreous china of size specified in the Schedule of Quantities.

5.2 Porcelain partitions shall be fixed at proper heights with CP brass bolts, anchor fasteners and MS clips as recommended by the manufacturer and directed by the Architect/Consultants.

6.0 WASH HAND BASIN :

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6.1 Wash basins shall be coloured or white glazed vitreous china of best quality, size, shape and type specified in the Schedule of Quantities.

6.2 Each basin shall be provided with painted MS angle or CI brackets and clips and the basin securely fixed to wall. Placing of basins over the brackets without secure fixing shall not be accepted. The MS angle shall be provided with two coats of red oxide primer and two coats of synthetic enamel paint of make, brand and colour as approved by the Architect/Consultants.

6.3 Each basin shall be provided with 32 mm dia C.P. waste of standard pattern with pop-up waste or rubber plug and chain as specified in the Schedule of Quantities, 32 mm dia C.P. brass bottle trap and angle valve with C.P.pipe to wall and flange as given in the schedule of quantities.

6.4 Each basin shall be provided with single hole mixing fitting or as specified in the Schedule of Quantities.

6.5 Basins shall be fixed at proper heights as shown on drawings. If height is not specified, the rim level shall be 80 cms or as directed by Architect/Consultants.

7.0 SINKS :

7.1 Sinks shall be white glazed fireclay or vitreous china or stainless steel or any other material as specified in the Schedule of Quantities.

7.2 Each sink shall be provided with M.S. or C.I. brackets and clips and securely fixed. Counter top sinks shall be fixed with suitable painted angle iron brackets or clips as recommended by the manufacturer. Each sink shall be provided with 40 mm dia C.P. waste with china and rubber plug with CP Brass chain as given in the Schedule of Quantities. The MS Angle shall be provided with Two coats of red oxide primer and two coats of synthetic enamel paint of make, brand and colour as approved by the Architect/Consultants.

7.3 Each sink shall be provided with hot and cold mixing fittings or CP taps as specified in the schedule of quantities.

8.0 MIRRORS :

8.1 Mirrors shall be electro coated copper 5.5mm thick of approved make. The size shall be as specified in the Schedule of Quantities or as shown on the drawings. The image shall be clear and without waviness at all angles of vision.

8.2 Mirrors shall be provided with backing of 12mm thick marine plywood

or 6mm thick cement asbestos sheet fixed with CP brass semi round

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headed screws and cup washers or CP brass clamps as specified or

instructed by Architect/Consultants.

9.0 TOILET PAPER HOLDER :

9.1 Toilet paper holder shall be of CP brass, powder coated/S.S. heavy duty of approved make and colour or as specified in Bill of Quantities.

10.0 HAND DRIER :

10.1 The hand drier shall be no touch operating type with solid state time delay to allow user to keep hand in any position.

10.2 The hand drier shall be fully hygienic, rated for continuous repeat use (CRU).

10.3 The rating of hand drier shall be such that time required to dry a pair of hands up to wrists is approximately 30 seconds.

10.4 The hand drier shall be of wall mounting type suitable for 230V, single phase, 50 Hz, AC power supply.

11.0 TOILETS FOR DISABLED(IF PROVIDED IN THE DWGS):

11.1 Where specified in washroom facilities designed to accommodate physically handicapped, accessories should be provided as directed by the Project Manager.

11.2 Stainless steel grab bars of required size suitable for concealed or exposed mounting and non-slip gripping surface shall be provided in all washrooms to be used by physically handicapped as directed by the Project Manager.

12.0 ACCESSORIES:

12.1 All C.P. bib taps and Angle valves shall be quarter turn-type washerless fittings. The angle valve shall be provided with stainless steel mesh filter.

12.2 Contractor shall install all chromium plated stainless steel and powder coated accessories as shown on the drawings or directed by Architect/Consultants and given in the Schedule of Quantities.

12.3 All C.P. accessories shall be fixed with C.P. brass half round head screws and cut washers in wall with rawl plugs or nylon sleeves and shall include cutting and making good as required or directed by Architect/Consultants.

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12.4 Joints/ gaps between all sanitary appliances/fixtures and the floor/ walls shall be caulked with an approved mildew resistant sealant, having anti-fungal properties, of colour and shade to match that of the appliance/ fixture and the floor/ wall to the extent possible.

13.0 TESTING :

All appliances, fixtures and fittings shall be tested before and after installation. Water seals of all appliances shall be tested. The Contractor shall block the ends of waste and ventilation pipes and shall conduct an air test with a pressure of 38mm water gauge for minimum of 3 minutes in accordance with BS:5572.

14.0 MEASUREMENT

14.1 Sanitary fixtures shall be measured by numbers.

14.2 Rate for providing and fixing of sanitary fixtures, accessories shall include all items, and operations stated in the respective specifications and Schedule of Quantities and nothing extra is payable.

14.3 Rates for all items under specifications paras above shall be inclusive of cutting holes and chases and making good the same, C.P. brass screws, nuts, bolts and any fixing arrangements required and recommended by manufacturers, testing and commissioning etc. complete.

14.4 Mirrors shall be measured on surface area basis in sqm/Nos.

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B) SOIL, WASTE, VENT & RAIN WATER PIPES:

1.0 SCOPE OF WORK :

1.1 Work under this section shall consist of furnishing all labour, materials,

equipments and appliances necessary and required to completely install all

soil, waste, vent, AHU drain, Rain water pipes, drainage sump riser and

fittings as required by the drawings and given in the Schedule of Quantities.

1.2 Without restricting to the generality of the foregoing, the soil, waste, vent pipe rain water system shall include the following :-

a) Horizontal and Vertical C.I. soil, waste and vent pipes, and fittings, Drip seal joint, clamps and connection to fixtures.

b) Floor and Urinal traps, Floor Drain, Cleanout plugs, G.I. inlet fittings and CP brass/stainless steel grating.

c) Waste pipe connection from all fixtures e.g wash basins, sinks, urinals, kitchen equipments and plant room equipment.

d) uPVC/CI Rain water pipes/CI(LA) Drainage/Sewage Sump Pump Riser.

e) uPVC sump vent pipe and fittings.

2.0 GENERAL :

2.1 All materials shall be new of the best quality conforming to IS codes and

specifications and subject to the approval of Consultants.

2.2 Pipes and fittings shall be fixed truly vertical, horizontal or in slopes as

required in a neat workman like manner.

2.3 Pipes shall be fixed in a manner as to provided easy accessibility for

repair and maintenance and shall not cause obstruction in shafts, passages

etc.

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2.4 Pipes shall be securely fixed to walls and ceilings by suitable clamps at

intervals specified.

2.5 Access doors for fittings and cleanouts shall be so located that they are easily accessible for repair and maintenance.

2.6 All work shall be executed as directed by the Engineer-in-charge.

3.0 CENTRIFUGAL CAST IRON (SPUN) PIPE :

3.1 Soil, waste, vent and anti-siphonage pipes, fittings and accessories shall be centrifugal cast iron (spun). All pipes shall be straight and smooth and their inside free from irregular bore, blow holes, cracks and other manufacturing defects. Pipes shall be centrifugally cast (spun) iron soil pipes conforming to IS: 3989-1984.

3.2 Standard weight, dimensions and pig lead required for joints shall be as follows:

For pipes conforming to IS:3989-1984 (centrifugally spun C.I pipes)

S.No.

Nominal Diameter

Thickness

Approximate mass including mass of Socket for pipe length1.80m

Internal diameter of socket

Depth of lead

Weight Of lead yarn

Mm mm Kg mm Mm Kg1 75 3.5 12.5 99 25 0.6002 100 4.0 18.8 126 25 0.8503 150 5.0 34.9 178 25 1.3004 200 6.0 51.0 2.00

37.0 Tolerance:

Acceptable tolerance for pipes to IS:3989 shall be as follows:

a) Wall thickness - 15%b) Length +20 mmc) Weight -10%

4.0 FITTINGS :

4.1 Fittings shall conform to the same Indian Standard (IS : 3989-1984) for pipes. Contractor shall use pipes and fittings of matching specifications.

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4.2 Fittings shall be of the required degree of curvature with or without access door as detailed in the drawings or as directed.

4.3 Access door shall be made up with 3mm thick insertion rubber washer and white lead. The bolts shall be lubricated with grease or white lead for easy removal later. The fixing shall be air and water tight.

5.0 FIXING :

5.1 All vertical pipes shall be fixed by MS clamps truly vertical. Branch pipes shall be connected to the stack at the same angle as that of the fittings. No collars shall be used on vertical stacks. Each stack shall be terminated at top with a cowl (terminal guard).

5.2 Horizontal pipes running along ceiling shall be fixed on structural adjustable clamps of special design shown on the drawings or as directed. Horizontal pipes shall be laid to uniform slope and the clamps adjusted to the proper levels so that the pipes fully rest on them.

5.3 Contractor shall provide all sleeves, openings, hangers, inserts during the construction. He shall provide all necessary information to the building Contractor for making such provisions in the structure as necessary. All damages shall be made good by the Contractor at his own cost to restore the surfaces.

6.0 CLAMPS :

6.1 Holder bat clamps shall be of standard design fabricated from MS flats 40x3mm thick and 12mm dia MS rod and 6mm nuts and bolts; painted with two coats of black bitumen paint before fixing. The clamps shall be fixed in cement concrete 1:2:4 mix (1 cement : 2 sand : 4 stone aggregate 20mm nominal size) blocks 100x100x100mm deep.

6.2 Where holder bat clamps are to be fixed in RCC column or slotted angles, walls or beam they shall be fixed with 40x3mm flat iron “U” type clamps with anchor fasteners of approved design.

6.3 Structural clamps shall be fabricated from MS structural members e.g. rods, angles, channels, flats as per detailed drawing or as directed. Contractor shall provide all nuts, bolts, welding material and paint the clamps with one coat of red oxide and two or more coats of black enamel paint to give an even shade.

6.4 Wherever MS clamps are required to be anchored directly to brick walls, concrete slabs, beams or columns, nothing extra shall be payable for clamping arrangement, RCC block and making good with cement concrete 1:2:4 mix (1 cement : 2 sand : 4 stone aggregate 20mm nominal size) as directed by the Architect/Consultants.

7.0 TRAPS :

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7.1 Floor Trap:

Floor trap shall be cast iron ‘P’ Trap with or without vent horn (deep seal with an effective seal of 50 mm). In case of Sunken slab in the Toilets, the trap and waste pipes shall be set in cement concrete blocks of size 300mm x 300mm and of required depth, firmly supported on the structural floor. The blocks shall be in 1 :2 :4 mix (1 cement : 2 coarse : 4 stone aggregate 20mm nominal size) and extended to 40mm below finished floor level. Contractor shall provide all necessary shuttering and centering for the blocks at no extra cost. ). In case of flat slab instead sunken slab in the Toilets, Contractor shall provide all sleeves, openings, hangers, inserts during the construction for fixing the floor traps and etc.

7.2 Urinal Trap:

Urinal traps shall be cast iron P or S traps with or without vent horn and set in cement concrete block specified under Clause 7.1 Floor Trap without extra charge.

7.3 Floor Trap Inlet/GI Inlet Fitting:

Traps and connections shall ensure free and silent flow of discharging water. Where specified, Contractor shall provide a special type cast iron or G.I. inlet hopper without or with one or two or three inlet sockets to receive the waste pipe. Joint between G.I. waste pipe and hopper inlet socket shall be Drip seal joint. Hopper shall be connected to a CI ‘P’ or ‘S’ trap with at least 50mm seal (hopper and traps shall be paid for separately). Floor trap inlet hoppers and the traps shall be set in cement concrete blocks/and supports as specified under clause 7.1 Floor trap above without extra charge.

8.0 CP/S.S. GRATING :

Floor and Urinal Traps, Floor drain shall be provided with 80-125 mm square or round C.P./stainless steel grating with rim of approved design and shape. Minimum thickness shall be 4 mm or as specified in the Schedule of Quantities.

9.0 JOINTING :

Soil, waste, vent and anti-siphonage pipes shall be jointed with Lead joint/Drip seal joint as mentioned in the BOQ.

The following minimum procedures shall be complied with while making the pipe joints :-

a) Ensure that the pipes are clean internally and undamaged.

b) The pipes shall be cut square with sharp tools.

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c) The cut ends of the pipes shall be filed/ reamed and finished smooth.

d) Any deformed ends shall be re-rounded.

e) It shall be ensured that the pipe ends shall enter the fittings and sockets to full depth of the jointing area.

f) The pipe work shall be assembled in a manner such that it does not entail making of joints in restricted locations.

g) Each metal pipe spigot shall be centered with three lightly wedged pieces of hardwood or folded lead.

h) The jointing surfaces shall be cleaned to remove any coatings or cutting oils, etc.

10.0 CI (LA) PIPE AND FITTING:

10.1 Sump Pump discharge Pipe/Rain Water horizontal header/soil waste header running at Basement ceiling/Rain Water Pipe running underground shall be centrifugally cast [spun] iron pressure pipe {class LA] conforming to IS 1536:2001

10.2 Dimension, Standard weight shall be as follows

Nominal Diameter DN mm

BarialSocket Mass

kg

Total for one working Length L in kg (Approved is Length)

DE mm

E mm

Mass for 1

Meter kg

3.66 m 4 m 4.5 m 5 m 5.5 m

80 98 7.2 14.7 5.5 59 64 72 79 87100 118 7.5 18.6 7.1 75 82 91 100 109125 144 7.9 24.2 9.2 97.8 106 118 130 142150 170 8.3 30.1 11.5 122 132 147 162 177200 222 9.2 44.0 16.8 178 193 215 237 259250 274 10 59.0 22.9 240 260 290 319 349300 326 10.8 76.5 29.8 310 336 374 412 450350 378 11.7 96.3 37.5 390 423 471 519 567

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10.3 Fitting for CI (LA) Pipe shall confirm to IS : 1538 – 1967 where possible junction from branch pipe shall be made by a ‘Y’ Tee.

11.0 CLEAN OUT PLUGS :

11.1 Contractor shall provide cast brass clean out plugs as required. Clean out plugs shall be threaded and provided with key holes for opening. Clean out plugs shall be fixed to the pipe by a GI socket and lead caulked joint.

12.0 WASTE PIPE FROM APPLIANCES :

12.1 Waste pipe from appliances e.g. washbasins, sinks and urinals etc. shall be of Galvanised-iron (GI) heavy duty (class ‘c’) conforming to IS : 1239 Part I as given in the Schedule of Quantities.

12.2 All pipes shall be fixed in gradient towards the outfalls of drains. Pipes inside a toilet room shall be in chase unless otherwise shown on drawings. Where required pipes may be run at ceiling level in suitable gradient and supported on structural clamps as directed by the Architect/Consultants. Spacing for the clamps shall be 3000mm for vertical runs and 2400mm for horizontal runs.

12.3 Pipes shall be galvanized steel tubes conforming to IS : 1239 (Heavy Class) and quality certificates shall be furnished. Pipes shall be provided with all required malleable fittings conforming to IS : 1879 e.g. tees, couplings, bends, elbows, unions, reducers, nipples, plugs etc. All GI waste pipes shall be terminated at the point of connection with the appliance with an outlet of suitable diameter. Pipes in chase shall be painted with two coats of black bitumestic paint and exposed pipes with one coat of red oxide primer and two or more coats of synthetic enamel paint or as given in the Schedule of Quantities.

TECHNICAL SPECIFICATION OF WC PAN CONNECTOR:

13.1 The WC pan connector shall be flexible/soft and shall be made of single body construction with integral fins, made from EVA (Ethgl vingl Acetate). The pan connector must confirm to BS 5627: 1984. The pan connector must be supplied with one seal made of TPE (Thermo plastic Elastomeric). The pan connector must be supplied with factory fitted spring loaded seal guard.

13.2 The connector shall not be allowed to come in contact with mineral oil, grease, putty or any compound containing mineral oil or grease.

13.3 The pan connector must be stared away from direct sun light and flames.

13.4 FIXING:

The soil pipe must be reasonably clean and smooth an the diner surface, in case the soil piping is in C.I material then supplier supplied bush/adaptor shall be used.

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The connector socket is pushed fully home on to the pan spigot, the reafter the WC is placed in position gently pushing the fitment to ensure that the connector end filts into the spigot of the pipe.The pan connector must be pushed in such an way as to ensure that the seats and fins turn inward to ensure proper sealing.

14.0 CEMENT CONCRETE:

Cast iron soil and waste pipes under floor in sunken slabs and in wall chases (when cut specially for the pipe) shall be encased in cement concrete 1:2:4 (1 cement: 2 coarse sand: 4 stone aggregate 12 mm size) 75 mm in bed and alround. When pipes are running well above the structural slab, the encased pipe shall be supported with suitable cement concrete pillars of required height at intervals of 1.8 m.

15.0 PAINTING :

15.1 Soil, waste, vent and anti-siphonage pipes in any exposed location in shafts, pipe spaces etc. shall be painted with two coats of primer and two or more coats of synthetic enamel paint of colour as specified to given an even shade.

15.2 Pipes shall be painted with paint of approved quality and shade in accordance with approved pipe colour code.

15.3 GI waste pipes in chase shall be painted with two coats of bitumen paint. Exposed pipes shall be painted with two or more coats of synthetic enamel paint over two coats of etch primer.

15.4 CI soil and waste pipes below ground and those covered in cement concrete shall not be painted.

16.0 CUTTING AND MAKING GOOD HOLES/ CHASES :

16.1 Pipes shall be fixed and tested as the building work proceeds. Contractor shall provide all necessary holes, cut outs and chases in structural members as the building work proceeds. Wherever holes are cut or left originally, they shall be made good with cement concrete 1 : 2 : 4 (1 cement : 2 coarse sand : 4 stone aggregated 20mm nominal size) or cement mortar 1 : 2 (1 cement : 2 coarse sand) as directed by the Architect/Consultants and the surface restored as in original condition to the entire satisfaction of the Architect/Consultants at no extra cost.

17.0 TESTING :

17.1 Testing shall be done in accordance with IS : 1172 and IS:5329 except as may be modified hereinunder.

17.2 Before use at site all CI pipes shall be tested by filling up with water for at least 30 minutes. After filling, pipes shall be struck with a hammer and

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inspected for blow holes and cracks. All defective pipes shall be rejected and removed from the site within 48 hours.

17.3 Soil and waste pipes shall be tested in sections after installation, by filling up the stack with water. All openings and connections shall be suitably plugged as approved by the Architect/Consultants. The total head in the stack shall be 4.5m at the highest point of the section under test. The period of test shall be two (2) hours minimum as directed by the Architect/Consultants. If any leakage is visible, the defective part of the work shall be cut out and made good.

17.4 The Contractor shall test all vent pipes by a smoke testing machine. Smoke shall be pumped into the stack after plugging all inlets and connections. The stack shall then be observed for leakages and all defective pipes and fittings removed or repaired as directed by the Architect/Consultants.

17.5 A test register shall be maintained and all entries signed and dated by Contractor and Architect/Consultants. A proforma of the proposed test register shall be submitted to the Architect/Consultants for approval.

17.6 All pipes in wall chase or meant to be chased or buried shall be hydro tested before the chase is plastered or the pipe encased or buried.

18.0 UPVC PIPES & FITTINGS:

18.1 UPVC PIPE AND FITTINGS FOR RAIN WATER DISPOSAL SYSTEM :

18.1.1 Rain water pipe shall be UPVC SWR Type A conforming to IS : 13592-1992.

18.1.2 Dimension of SWR Pipe Fittings shall be as per DIN 19531 and DIN 19534 and conforms to IS : 14735-1999.

Rubber ring shall be conforming to IS : 5382.

18.1.3 DIMENSION OF SWR PIPES CONFORMING TO IS : 13592-1992

S.No.

NominalOutside

diameter(D)mm

ToleranceOf

Outsidediameter

Wall Thickness –Type A (t) mm

Wall Thickness –Type B (t) mm

Min in Max Min Max

1. 75 +0.3 1.8 2.2 3.2 3.82. 90 +0.4 1.9 2.3 3.2 3.83. 110 +0.4 2.2 2.7 3.2 3.84. 160 +0.5 3.2 3.8 4.0 4.6

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18.1.4 Maximum Support Distance in Meter :S.No. Size (mm) Horizontal Support Distance

(m)Vertical SupportDistance (m)

1. 40 0.4 1.22. 50 0.5 1.53. 75 0.75 2.04. 110 1.1 2.05. 160 1.6 2.0

18.1.5 Rubber ring shall be of make and type approved by Pipe and fitting manufacturer. Rubber ring joint shall be made in an approved manner as recommended by the manufacturer.

18.1.6 For testing, seal hermetically at all opening below the top of the section to be tested. The water level shall then be raised to a height of not less than 3m above the highest point of the section being tested or as the inspection offer may direct. Every joint shall be carefully examined for leaks.

19.1. TECHNICAL DETAIL :

[1] Dimension of Unplasticized PVC Pressure Pipes [Ring Fit/Ring Tight Rigid PVC Pipes [As per IS : 4985-2000].

Nominaloutside

Diameter

(Nominal

Size) 

Mean Outside

Diameter

WALL THICKNESSClass 1

0.25 MpaClass 20.4 Mpa

Class 30.6 Mpa

Class 40.8 Mpa

Class 51.0 Mpa

Class 61.25 Mpa

Min Max Min Max Min Max Min Max Min Max Min Max Min Max

20 20.0 20.3 - - - - - - - - 1.1 1.5 1.4 1.8

25 25.0 25.3 - - - - - - 1.2 1.6 1.4 1.8 1.7 2.1

32 32.0 32.3 - - - - - - 1.5 1.9 1.8 2.2 2.2 2.7

40 40.0 40.3 - - - - 1.4 1.8 1.8 2.2 2.2 2.7 2.8 3.3

50 50.0 50.3 - - - - 1.7 2.1 2.3 2.8 2.8 3.3 3.4 4.0

63 63.0 63.3 - - 1.5 1.9 2.2 2.7 2.8 3.3 3.5 4.1 4.3 5.0

75 75.0 75.3 - - 1.8 2.2 2.6 3.1 3.4 4.0 4.2 4.9 5.1 5.9

90 90.0 90.3 1.3 1.7 2.1 2.6 3.1 3.7 4.0 4.6 5.0 5.7 6.1 7.1

110 110.0 110.4 1.6 2.0 2.5 3.0 3.7 4.3 4.9 5.6 6.1 7.1 7.5 8.7

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Nominaloutside

Diameter

(Nominal

Mean Outside

Diameter

WALL THICKNESSClass 1

0.25 MpaClass 20.4 Mpa

Class 30.6 Mpa

Class 40.8 Mpa

Class 51.0 Mpa

Class 61.25 Mpa

Min Max Min Max Min Max Min Max Min Max Min Max Min Max125 125.0 125.4 1.8 2.2 2.9 3.4 4.3 5.0 5.6 6.4 6.9 8.0 8.5 9.8

140 140.0 140.5 2.0 2.4 3.2 3.8 4.8 5.5 6.3 7.3 7.7 8.9 9.5 11.0

160 160.0 160.5 2.3 2.8 3.7 4.3 5.4 6.2 7.2 8.3 8.8 10.2 10.9 12.6

180 180.0 180.6 2.6 3.1 4.2 4.9 6.1 7.1 8.0 9.2 9.9 11.4 12.2 14.1

200 200.0 200.6 2.9 3.4 4.6 5.3 6.8 7.9 8.9 10.3 11.0 12.7 13.6 15.7

225 225.0 225.7 3.3 3.9 5.2 6.0 7.6 8.8 10.0 11.5 12.4 14.3 15.3 17.6

250 250.0 250.8 3.6 4.2 5.7 6.5 8.5 9.8 11.2 12.9 13.8 15.9 17.0 19.6

280 280.0 280.9 4.1 4.8 6.4 7.4 9.5 11.0 12.5 14.4 15.4 17.8 19.0 21.9

315 315.0 316.0 4.6 5.3 7.2 8.3 10.7 12.4 14.0 16.1 17.3 19.9 21.4 24.7

355 355.0 356.1 5.1 5.9 8.1 9.4 12.0 13.8 15.8 18.2 19.6 22.6 24.1 27.8

400 400.0 401.2 5.8 6.7 9.1 10.5 13.5 15.6 17.8 20.5 22.0 25.3 27.2 31.3Notes :

1. The table is based on metric series of pipe dimension given in ISO 161/1 in respect of pipe dimensions and ISO DIS 4422.

2. The wall thickness of pipe is based on a safe working stress of 8.6 MPa at 27oC. The working pressure gets reduced at sustained higher temperatures. Occasional rise in temperature, as in summer, with concurrent corresponding reduction in temperature during nights has no deleterious effect on the working pressure of the pipes considering the total life of pipe.

20.0 MEASUREMENT AND RATES :

20.1 General :

a) Rates for all items shall be inclusive of all work and items called for in the specifications given above and the Schedule of Quantities as applicable for the work under floors, in shafts or at ceiling level at all heights and depths.

b) All rates are inclusive of cutting holes and chases in RCC and masonry work and making good the same.

c) All rates are inclusive of pre testing at site and final testing of the installations, materials and commissioning.

20.2 Pipes :

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a) The unit of measurement shall be linear metre to the nearest centimeter.

b) All UPVC & CI soil, waste, vent, anti-siphonage and rain water pipes, AHU Drainage & sump riser shall be measured net, when fixed correct to a centimeter, including all fittings along their length after fixing. The length shall be taken along center line of the pipes and fittings. No allowance shall be made for the portions of pipe lengths entering the sockets of the adjacent pipes or fittings. The above shall apply to all cases i.e. whether pipes are fixed on wall face or pillars or embedded in masonry or pipes running at ceiling level. The quoted rate shall include lead jointing.

c) GI pipes shall be measured in running metre correct to a centimeter for the finished work which shall include fittings e.g. bends, tees, elbows, reducers, crosses, sockets, nipples, nuts, unions etc. The length shall be taken along center line of the pipes and fittings. All pipes and fittings shall be classified according to their diameter, method of jointing and fixing substance, quality and finish. The diameters shall be nominal diameter of internal bore. In case of fittings of unequal bore, the largest bore shall be considered.

20.3 Pipe Encasing/ Supports :

Cement concrete around pipes shall be measured along the center of the pipe line measured per linear metre and include any masonry supports, shuttering and centering, curing, cutting etc. complete as described in the relevant specifications.

20.4 Angles/ Channels

Slotted angles/ channels shall be measured per linear metre of finished length and shall include support bolts and nuts, length embedded in the cement concrete blocks of 1 : 2 : 4 (1 cement : 2 coarse sand : 4 stone aggregate 20mm nominal size) formed in the masonry walls; nothing extra shall be paid for the cement concrete block and making good the masonry wall, anchor fastners etc. complete.

20.5 Traps

Unit of measurement shall be the number of pieces. All urinal traps, trap gratings, hoppers, clean out plugs shall be measured by number and shall include all items described in the relevant specifications and Schedule of Quantities. Cockroach traps shall not be measured separately and are deemed to be included in the rate for traps.

20.6 Painting

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Painting of pipes shall be measured per running metre for each diameter of pipe and shall be inclusive of all fittings and clamp. No deduction shall be made for fittings.

C) WATER SUPPLY SYSTEM :

1.0 SCOPE OF WORK

1.1 Work under this section consists of furnishing all labour, materials equipment and appliances necessary and required to completely install for water supply system (Cold Water Supply + Hot Water Supply) as required by the drawings, specified hereinafter and given in the Schedule of Quantities.

1.2 Without restricting to the generality of the foregoing, the water supply system shall include the following :-

a) Water supply works inside the building etc. including connection to vertical stack / main line.

b) Pipe protection and painting.

c) Connections to all fixtures etc.

d) Ball valve/butterfly valve/Non Return valve.

2.0 GENERAL REQUIREMENTS :

2.1 All materials shall be new and of the best quality conforming to specifications. All works executed shall be to the satisfaction of the Project Manager.

2.2 Pipes and fittings shall be fixed truly vertical, horizontal or in slopes as required in a neat workmanlike manner.

2.3 Short or long bends shall be used on all main pipe lines as far as possible. Use of elbows shall be restricted for short connections. As far as possible all bend shall be formed by means of a hydraulic pipe bending machine for pipe up to 65 mm dia.

2.4 Pipes shall be laid in a manner as to provide as far as possible easy accessibility for repair and maintenance and shall not cause obstruction in shafts, passage etc.

2.5 Valves and other appurtenances shall be so located as to provide easy accessibility for operations, maintenance and repairs.

2.6 Pipe shall be securely fixed to wall and ceiling by suitable clamps at intervals specified.

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3.0 GI PIPES, FITTINGS AND VALVES :

3.1 All pipes inside the buildings and where specified, outside the building shall be galvanized steel tubes conforming to IS: 1239 of Class specified. When Class is not specified they shall be Heavy Class.

3.2 Fittings shall be of malleable cast iron galvanized of approved make. Each fitting shall have manufacturer’s trade mark stamped on it. Fittings for G.I pipes shall include couplings, bends, tees, reducers, nipples, unions, bushes etc. Fittings etc. shall conform to IS : 1879. (Part 1 to X) 1987.

3.3 Pipes and fittings shall be jointed with screwed joints using Teflon tape suitable for water pipes. Care shall be taken to remove burr from the end of the pipe after cutting by a round file. All pipes shall be fixed in accordance with layout and alignment shown on the drawings. Care shall be taken to avoid air pockets. Necessary vents and drains shall be provided at all high and low points respectively. G.I pipes inside toilets shall be fixed in wall chases well above the floor. No pipes shall be run inside a sunken floor as far as possible. Pipes may be run under the ceiling or floors and other areas as shown on drawings.

3.4 Pipe Support :

3.4.1 All pipes clamps, supports, hangers, pipe support shall be factory made galvanized MS steel or alternatively galvanized after fabrication to suit site requirement pipe supports.

3.4.2 G.I pipes in shafts and other locations shall be supported by G.I clamps of design approved by the Architect/Consultants. Pipes in wall chases shall be anchored by iron hooks. Pipes at ceiling level shall be supported on structural clamps fabricated from MS structurals. Pipes in shafts shall be supported on slotted angles/ channels as specified/ as directed.

3.4.3 Anchor Fasteners

3.4.4 All pipe supports, hangers and clamps to fixed on RCC walls, beams, columns , slabs and masonry walls 230 mm thick and above by means of galvanised expandable anchor fasteners in drilled holes of correct size and model to carry the weight of pipes. Drilling shall be made only by approved type of power drill as recommended and approved by manufacturer of the anchor fasteners. Failure of any fastening devices shall be the entire responsibility and contractor shall redo or provide additional supports at his own cost. He shall also compensate the owner for any damage that may be caused by such failures.

3.5 Unions :

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3.5.1 Contractor shall provide adequate number of unions on all pipes to enable easy dismantling later when required. Unions shall be provided near each gunmetal valve, stop cock or check valve and on straight runs as necessary at appropriate locations as required for easy dismantling and/ or as directed by Architect/Consultants.

3.6 Flanges :

3.6.1 Flanged connections shall be provided on pipes as required for maintenance/ ease in dismantling or where shown on the drawings, all equipment connections as necessary and required or as directed by the Architect/Consultants. Connections shall be made by the correct number and size of the GI nuts/ bolts as per relevant IS Standards and made with 3mm thick insertion rubber washer/ gasket. Where hot water or steam connections are made insertion gasket shall be of suitable high temperature grade and quality approved by the Architect/Consultants. Bolt hole dia for flanges shall conform to match the specification for CI sluice valve as per IS:780. Gaskets shall conform to IS:11149.

3.7 Trenches :

3.7.1 All G.I pipes below ground shall be laid in trenches with a minimum cover of 600mm. The width and depth of the trenches shall be as follows :-

S. No. Dia of pipe Width of trench Depth of trench1 15mm to 50mm 300mm 750mm2 65mm to 100mm 450mm 1000mm3 150mm and above 600mm 1200mm

3.8 Sand Filling :

GI pipes in trenches shall be protected with fine sand 150mm all around beforefilling in the trenches.

4.0 Painting :

4.1 All pipes above ground shall be painted with one coat of red oxide and two coats of synthetic enamel paint of approved shade and quality. Pipes shall be painted to standard colour code specified by the Architect/Consultants.

5.1 Pipe protection :

5.2.1 Where specified in the schedule of quantities all pipes in chase below ground shall be protected against corrosion by applying two coats of bitumen paint wrapping with polythene tape and finishing with one more coat of bitumen paint.

5.2.3 PIPING INSTALLATION:

35

Tender drawings indicate schematically the size and location of pipes. The contractor on the award of the work, shall prepare detailed working drawings, showing the cross-section, longitudinal sections, details of fittings, locations of isolating and control valves, drain valves and all pipe support, structural supports. He must keep in view the specific openings in buildings and other structures through which pipes are designed to pass.

a. Piping shall be properly supported on or suspended from clamps, hangers as specified and as required. The contractor

shall adequately design all the brackets, saddles, anchors, clamps and hangers and be responsible for their structural

sufficiency.

b. Pipe supports shall be of steel, adjustable for height and primer coated with rust preventive paint and finish coated back. Where pipe and clamps are of dissimilar materials a gasket shall be provided in between. Spacing of pipe supports shall not exceed the following:

S Pipe Size Spacing between Supports

1 Upto 12 mm 1500 mm (1.5m)2 15 to 150 mm 2000 mm (2.0 m)3 150 mm & over 2500 mm (2.5m)

c. Vertical risers shall be parallel to walls and column lines and shall be straight and plumb. Risers passing from floor to floor shall be supported at each floor by clamps or collars steel structural supports attached to pipe and with a 15 mm thick rubber pad or any resilient material. Where pipes pass through the terrace floor, suitable flashing shall be provided to prevent water leakage. Risers shall have a suitable clean out at the lowest point and air vent at the highest point.

d. Pipe sleeves, 50 mm larger diameter than pipes, shall be provided wherever pipes pass through walls and slabs, and annular space filled with fiberglass and finished with retainer rings.

e. All pipe work shall be carried out in a workmen like manner, causing minimum disturbance to the existing services, buildings, roads and structure. The entire piping work shall be organized in consultation with other agencies work so that particular area work shall be carried out in one trench.

36

f. Cut outs in the floor slab for installing the various pipes are indicated in the drawings. Contractor shall carefully examine the cut outs provided and clearly point out wherever the cut outs shown in the drawings, do not meet with the requirements.

g. The contractor shall make sure that the clamps, steel structural supports brackets, clamp saddles and hangers provided for pipe supports are

adequate. Piping layout shall take due care for expansion and contraction in pipes, and include expansion joints where required.

h. All pipes shall be accurately cut to the required sizes in accordance with relevant codes and burrs removed before laying. Open ends of the pipes shall be closed as the pipe is installed to avoid entrance of foreign matter. Where reducers are to be made in horizontal runs, eccentric reducers shall be used for the piping to drain freely. In other locations, concentric reducers may be used.

5.2.3 BALL VALVES:

All ball valves shall be heavy duty of approved make. Valves shall have suitable for test pressure of 25 Kg/Sqcm. Ball valves shall conform to the following specifications.

Size Construction Ends

15 to 50 mm

Bronz body S.S. Working Part stainless steel balls, spindle, t eflon seating and gland packing

Screwed

6.0 BUTTERFLY VALVE:

All butterfly valves shall be heavy duty cast iron of approved make. The valves shall be suitable for 15 Kg/Sqcm test pressure & shall conform to the following specifications Butterfly valve shall be of best quality conforming to IS: 13095:

Size Construction Ends

65 mm and above Cast iron Flanged

6.1.1 NON-RETURN VALVES:

All non-return valves shall be provided as shown in the drawings conforming to relevant Indian Standards and in accordance with the following specifications.

Size Construction Ends

Upto 50 mm. Gun metal Screwed

65 mm and above Gun metal/cast iron Flanged

37

Non-return valves shall be of approved make.

6.1.2 TECHANICAL SPECIFICATION OF PRESSURE REDUCING VALVE:

PRV in brass housing (DZR) with G ¼ “pressure gauge connection part,

spring bonnet with adjustable opening having adjustable knob for

pressure adjustments. The diaphragm shall be in fibre- reinforced NBR

and seals in NBR. The adjustment spring shall not be in touch with

water at any given time.

WORKING:

The force of the diaphragm shall operate against the force of an

adjustable spring. The inlet pressure shall have no influence in either the

opening or closing the valve, hence, inlet pressure fluction shall not

influence the outlet pressure shall remain constant at all times.

ADJUSTMENT OF PRESSURE:

The knob fitted on top of the PRV shall be turned toward (-) or (f) sign to reduce/ increase the outlet pressure as desired.

RANGE:

a. Inlet pressure : Max 16 bar

b. Outlet pressure : 1.5 to 6 bar adjustable

c. Operating temperature : Max to Degree C

d. Maximum pressure drip : 1 bar

7.0 HIGH DENSITY POLYETHYLENE PIPES (HDPE)

7.1 PE

Indian Standard lays down requirements for high density polyethylene pipes from 16 mm to 1000 mm diameter of pressure rating from 0.25 MPa to 1.60 MPa in material graders of PE 63, PE80 and PE 100 for buried water mains and services and for supply above ground both inside and outside.

38

7.2 REFERENCES:

Indian Standards listed below are necessary to this standard:

To Title

963 Methods of test for polyethylene moulding materials and polyethylene compounds.

968 Methods for random sampling.

992 High density polyethylene materials for moulding and extrusion (first revision)

986Method of analysis for the determination of specific and /or overall migration of constituents of plastics materials and articles intended to come into contact with food stuffs (first revision)

1982 Positive list of constituents of polyethylene in contact with foodstuffs, pharmaceuticals and drinking water.

1982 Polyethylene for its safe use in contact with foodstuff, pharmaceutical and drinking water.

Table-I Classification of Pipe Material

(Clause 5)Material Grade

MRS (Minimum Required Strength) of Material in MPa, at

20oC, 50 years.

Maximum Allowable Hydrostatic Design Stress (O), MPa

At 20oC At 30oC(2) (3) (4) (5)

PE 63 6.3 5.0 4.0PE 80 8.0 6.3 5.0PE 100 10.01 8.0 6.3

7.3 DESIGNATION:

7.3.1 Pipes shall be designated according to the grade of material (4.2.2) followed by pressure rating (see 4.2.3) and nominal diameter (see 4.2.4). For example, PE 63 PN 10 DN 200 indicates a pipe pertaining to material grade 63, pressure rating 1.0 MPa and outside nominal diameter 200 mm.

7.3.2 Grade of Material.

7.3.2.1 Pipes shall be classified according to the grade of materials as given in Table-I.

7.3.2.2 The maximum allowable hydrostatic design stress © of a pipe is obtained by a applying the design co-efficient of 1/25 (min) to the MRS value of the material, taking into consideration the temperature at which the pipe is to be designed for.

39

7.3.2.3 The material grading shall be given by the raw material supplier and in case of master batch, by the pipe manufacturer.

7.3.3 Pressure Rating:

Pipes shall be classified by pressure rating (PN) corresponding to the maximum permissible working pressure at 30oC, as follows:

Pressure Rating of Pipe Maximum permissible Working PressurePN 2.5 0.25 MPa PN 4 0.40 MPaPN 6 0.60 MPaPN 10 1.00 MPaPN 12.5 1.25 MPaPN 16 1.60 MPa

Note: These pipes are recommended for maximum water temperature of +45oC. The pipes may also be used up to ambient temperature of –40oC. The recommended maximum working pressure for the material at 20oC in a pipe form is 5 MPa for 50 years of life. The creep rupture strength of the pipe diminishes with the increase in temperature above 27 oC and the working pressure should be modified.

7.3.4 High Density Polyethylene:High density polyethylene (HDPE) used for the manufacturer of pipes shall conform to designation PEEWA-45-T-006 of IS 7328: 1992. HDPE conforming to designation PEEWA-45-T-012 of IS 7328:1992 may also be used with the exception that melt flow rating (MFR) shall not exceed 1.10 g/10 minutes. In addition the material shall also conform to 5.6.2 of IS 7328:1992.

7.3.4.1 The specified base density shall be between 940.5 Kg/m3 and 946.4 Kg/m3 (both inclusive) when determined at 27oC according to procedure prescribed in Annex A of IS 7328:1992. The value of the density shall also not differ from the nominal value by more than 3Kg/m3 as per 5.2.1.1 of IS 7328:1992.

7.3.4.2 The MFR of the material shall be between 0.41 and 1.10 (both inclusive) when tested at 190oC with nominal load of 5 Kgf as determined by method prescribed in 7of IS 2530:1963. The MFR of the material shall also be within + 20 percent of the value declared by the manufacturer.

7.3.4.3 The resin shall be compounded with carbon black. The carbon black content in the material shall be within 2.5 + 0.5% and the dispersion of carbon black shall be satisfactory when tested according to the procedure described in IS 2530:1963.

7.3.5 Anti-oxidant:

40

The percentage of anti-oxidant used shall not be more than 0.3 percent by mass of finished resin. The anti-oxidant used shall be physiologically harmless and shall be selected from the list given in IS 10141:1982.

Dimension of HDPE Pipes for Material Grade PE-63 as per IS 4984 : 1995

All Dimensions in Millimeters

WALL THICKNESS OF PIPES FOR PRESSURE RATINGS OF Nomina

l Dia PN 2.5 PN 4 PN 6 PN 8 PN 10 PN 12.5 PN 16

DN Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.

(1) (2) (3) (4) (5) (6) (7) ;(8) (9) (10) (11) (12) (13) (14) (15)20 - - - - - - - - 2.3 2.8 2.8 3.3 3.4 4.025 - - - - - - 2.3 2.8 2.8 3.3 3.4 4.0 4.2 4.932 - - - - 2.3 2.8 3.0 3.5 3.6 4.2 4.4 5.1 5.4 6.240 - - 2.0 2.4 2.8 3.3 3.7 4.3 4.5 5.2 5.5 6.3 6.7 7.650 - - 2.4 2.9 3.5 4.1 4.6 5.3 5.6 6.4 6.8 7.7 8.4 9.563 2.0 2.4 3.0 3.5 4.4 5.1 5.8 6.6 7.0 7.9 8.6 9.7 10.5 11.875 2.3 2.8 3.6 4.2 5.3 6.1 6.9 7.8 8.4 9.5 10.2 11.5 12.5 14.090 2.8 3.3 4.3 5.0 6.3 7.2 8.2 9.3 10.0 11.2 12.2 13.7 15.0 16.7110 3.4 4.0 5.3 6.1 7.7 8.7 10.0 11.2 12.3 13.8 14.9 16.6 18.4 20.5125 3.8 4.4 6.0 6.8 8.8 9.9 11.4 12.8 13.9 15.5 16.9 18.8 20.9 23.2140 4.3 5.0 6.7 7.6 9.8 11.0 12.8 14.3 15.6 17.4 19.0 21.1 23.4 26.0160 4.9 5.6 7.7 8.7 11.2 12.6 14.6 16.3 17.8 19.8 21.7 24.1 26.7 29.6180 5.5 6.3 8.6 9.7 12.6 14.1 16.4 18.3 20.0 22.2 24.4 27.1 30.0 33.2200 6.0 7.0 9.6 10.8 14.0 15.6 18.2 20.3 22.3 24.8 27.1 30.1 33.4 37.0225 6.0 7.8 10.8 12.1 15.7 17.5 20.5 22.8 25.0 27.7 30.5 33.8 37.5 41.5250 7.6 8.6 12.0 13.4 17.5 19.5 22.8 25.3 27.8 30.8 33.8 37.4 41.7 46.1280 8.5 9.6 13.4 15.0 19.6 21.8 25.5 28.3 31.2 34.6 37.9 41.9 46.7 51.6315 9.6 10.8 15.0 16.7 22.0 24.4 28.7 31.8 35.0 38.7 42.6 47.1 52.5 58.0355 10.8 12.1 17.0 18.9 24.8 27.5 32.3 35.8 39.5 43.7 48.0 53.0 59.2 65.4400 12.2 14.3 19.1 22.2 28.0 32.4 36.4 42.1 44.5 51.4 54.1 62.5 - -450 13.7 16.0 21.5 25.0 31.4 36.4 41.0 47.4 50.0 57.7 - - - -500 15.2 17.7 23.9 27.7 34.9 40.4 45.5 52.6 55.6 64.2 - - - -560 17.0 19.8 26.7 31.0 39.1 45.2 51.0 58.9 - - - - - -630 19.1 22.2 30.0 34.7 44.0 50.8 57.3 66.1 - - - - - -710 21.6 25.1 33.9 39.2 49.6 57.3 - - - - - - - -800 24.3 28.2 38.1 44.1 55.9 64.5 - - - - - - - -900 27.3 31.6 42.9 49.6 - - - - - - - - - -1000 30.4 35.2 47.7 55.1 - - - - - - - - - -

41

Dimension of HDPE Pipes for Material Grade PE-80 as per IS 4984 : 1995

WALL THICKNESS OF PIPES FOR PRESSURE RATINGS OF Nominal Dia PN 2.5 PN 4 PN 6 PN 8 PN 10 PN 12.5 PN 16

DN Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15)20 - - - - - - - - - - 2.3 2.8 2.8 3.325 - - - - - - - - 2.3 2.8 2.8 3.3 3.5 4.132 - - - - - - 2.4 2.9 3.0 3.5 3.6 4.2 4.5 5.240 - - - - 2.3 2.8 3.0 3.5 3.7 4.3 4.5 5.2 5.6 6.450 - - 2.3 2.8 2.9 3.5 3.8 4.4 4.4 5.3 5.6 6.4 6.9 7.563 - - 2.5 3.0 3.6 4.2 4.7 5.4 5.3 6.6 7.0 7.9 8.7 9.875 - - 2.9 3.4 4.3 5.0 5.6 6.4 6.3 7.8 8.4 9.5 10.4 11.790 2.3 2.8 3.5 4.1 5.1 5.9 6.7 7.6 8.2 9.3 10.0 11.2 12.5 14.0110 2.7 3.2 4.3 5.0 6.3 7.2 8.2 9.3 10.0 11.2 12.3 13.8 15.2 17.0125 3.1 3.7 4.9 5.6 7.1 8.1 9.3 10.5 11.4 12.8 13.9 15.5 17.3 19.3140 3.5 4.1 5.4 6.2 8.0 7.0 10.4 11.7 12.8 14.3 15.6 17.4 19.4 21.6160 4.0 4.6 6.2 7.1 9.1 10.3 11.9 13.3 14.5 16.3 17.8 19.8 22.1 24.6180 4.4 5.1 7.0 7.9 10.2 11.5 13.4 15.0 16.4 18.3 20.0 22.2 24.9 27.6200 4.9 5.6 7.7 8.7 11.4 12.8 14.9 16.6 18.0 20.3 22.3 24.8 27.6 30.6225 5.5 6.3 8.7 9.8 12.8 14.4 16.7 18.6 20.0 22.8 25.0 27.7 31.1 34.5250 6.1 7.0 9.7 10.9 14.2 16.9 18.6 20.7 22.0 25.3 27.8 30.6 34.5 38.2280 6.9 7.8 10.8 12.1 15.9 17.7 20.8 23.1 25.5 28.3 31.2 34.6 38.7 42.8315 7.7 8.7 12.2 13.7 17.9 19.9 23.4 26.0 28.7 31.8 35.0 38.7 43.5 48.1355 8.7 9.8 13.7 15.3 20.1 22.4 26.3 29.2 32.3 35.8 39.5 43.7 49.0 54.1400 9.8 11.5 15.4 18.0 22.7 26.4 29.7 34.4 36.4 42.1 44.5 51.4 55.2 63.7450 11.0 12.9 17.4 20.3 25.5 29.6 33.4 38.7 44.0 47.4 50.0 57.7 - -500 12.2 14.3 19.3 22.4 28.4 32.9 37.1 42.9 45.5 52.6 55.6 64.2 - -560 13.7 16.0 21.6 25.1 31.7 36.7 41.5 48.0 51.0 58.9 - - - -630 15.4 18.0 24.3 28.2 35.7 41.3 46.7 54.0 57.3 66.1 - - - -710 17.4 20.3 27.4 31.8 40.2 46.5 52.6 60.7 - - - - - -800 19.6 22.8 30.8 35.7 45.3 52.3 - - - - - - - -900 22.0 25.5 34.7 40.2 51.0 58.9 - - - - - - - -1000 24.4 28.3 38.5 44.5 56.7 65.5 - - - - - - - -

Dimension of HDPE Pipes for Material Grade PE-100 as per IS 4984 : 1995

42

Wall Thickness of Pipes for Pressure Rating ofNominal

Dia PN 6 PN 8 PN 10 PN 12.5 PN 16

DN Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)20 - - - - - - - - 2.3 2.825 - - - - - - 2.3 2.8 2.9 3.432 - - - - 2.4 2.9 2.9 3.4 3.7 4.340 - - 2.4 2.9 3.0 3.5 3.7 4.3 4.6 5.350 2.3 2.8 3.0 3.5 3.7 4.3 4.6 5.3 5.7 6.563 2.9 3.4 3.8 4.4 4.7 5.4 5.7 6.5 7.1 8.175 3.5 4.1 4.5 5.2 5.6 6.4 6.8 7.7 8.5 9.690 4.1 4.8 5.4 6.2 6.7 7.6 8.2 9.3 10.2 11.5110 5.0 5.7 6.6 7.5 8.1 9.2 10.0 11.2 12.4 13.9125 5.7 6.5 7.5 8.5 9.2 10.4 11.3 12.7 14.1 15.8140 6.4 7.3 8.4 9.5 10.3 11.6 12.7 14.2 15.8 17.6160 7.3 8.3 9.6 10.8 11.8 13.2 14.5 16.2 18.1 20.2180 8.2 9.3 10.8 12.1 13.3 14.9 16.3 18.2 20.3 22.6200 9.1 10.3 12.0 13.4 14.8 16.5 18.1 20.2 22.6 25.1225 10.3 11.6 13.5 15.1 16.6 18.5 20.4 22.7 25.4 28.2250 11.4 12.8 15.0 16.7 18.4 20.5 22.6 25.1 28.2 31.3280 12.8 14.3 16.8 18.7 20.6 22.9 25.3 28.1 31.6 35.0315 14.4 16.1 18.9 21.0 23.2 25.8 28.5 31.6 35.5 39.3355 16.2 18.1 21.2 23.6 26.2 29.1 32.1 35.6 40.0 44.2400 18.2 21.2 23.9 27.7 29.5 34.2 36.2 41.9 45.1 52.1450 20.5 23.8 26.9 31.2 33.1 38.3 40.7 47.1 50.8 58.7500 22.8 26.5 29.9 34.6 36.8 42.6 45.2 52.2 56.4 65.1560 25.5 29.6 33.5 38.8 41.2 47.6 50.6 58.4 - -630 28.7 33.3 37.7 43.6 46.4 53.6 56.9 65.7 - -710 32.3 37.4 42.4 49.0 52.3 60.4 - - - -800 36.4 42.1 47.8 52.2 58.9 68.0 - - - -900 41.0 47.4 53.8 62.1 - - - - - -1000 45.5 52.6 - - - - - - - -

7.4 INSTALLATION FOR HDPE PIPES:

7.4.1 BUTT WELDING : A RELIABLE METHOD FOR LEAKPROOF JOINTS OF HDPE PIPES:

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BUTT WELDING is the most important jointing method in HDPE pipes. This method is known as a heat pressure related process by which the pipe end material of two pipes are melted together under pressure creating a homogenous pipe structure. Simple in its idea, the butt fusion process demands high accuracy to give the final product i.e. a BUTT WELD. However, the method is very simple and reliable.

1. The two pipes to be welded are clamped in a welding machine &

are brought in axial alignment.

2. Ends of pipes are cleaned using damp cloth and scraper to ensure that welding faces are free from dust and other foreign materials.

3. The pipe ends are pressurised against the hot plate with a specified temperature (between 2000- 2100C), pressure and specified time. The pipe material melts forming a circular bid on periphery of both the pipe ends.

4. When the ends of pipes melted and bid formation is over, the hot plate is removed and the melted ends are pressed against each other to make a Butt Weld. The welding 4pressure is specified and welded time as well.

When the weld has been cooled down the pipes are taken out from the machine and preparation of next joint can start.

8.0 AUTOMATIC AIR VENT (AAV): Automatic air vents, shall be furnished at the top of main water risers,

supply and return pipes.

A shut-off valve shall be provided at the inlet of each automatic air vent. The outlet shall be piped to the nearest drain.

Air Release Valves shall be capable of automatically releasing accumulated air from a fluid system while that system is in operation and under pressure.

To assure drop tight shut-off, a viton orifice button shall be used to seal the valve discharge orifice when the valve is in a closed position. The orifice diameter will be sized for use within a given operating pressure range to insure maximum discharge capacity.

9.0 DUCTILE IRON PIPES & FITTINGS

DI pipes (Class K9) and fittings (Class 12) shall be in accordance with IS 8329 and IS 9523 respectively. Pipes and fittings shall be procured

44

from reputed manufacturers. The Contractor or their authorized representative shall at all reasonable times have free access to the place where the pipes and fittings are manufactured for the purpose of examining and testing the pipes and fittings and for witnessing the test and manufacturing.

The pipes and fittings shall be stripped, with all precautions necessary to avoid warping or shrinking defects. The pipes and fittings shall be free from defects. In the case of spigot and socket pipes and fittings the socket shall be without the centre ring.

In the case of flanged pipes, the flanges shall be at the right angles to the axis of the pipe and machined on face. The bolt holes shall be drilled and located symmetrically off the centre line. The bolt holes shall be concentric with the bore and bolt holes equally spaced. The flanges shall be integrally cast with the pipes and fittings and the two flanges of the pipe shall be correctly aligned.

Materials

The materials used in the manufacture of pipes and fittings shall comply with requirements specified in IS 8329 and IS 9523. Dimensions and Tolerances

The internal diameter, thickness and length of barrel, dimensions of pipes and fittings shall be as per relevant tables of IS 8329/IS 9523 for different class of pipes and fittings. Each pipe shall be of uniform thickness throughout its length.

The tolerances for pipes and fittings regarding dimensions, mass, ovality and deviations from straight line in case of pipes shall be as per IS 8329/IS 9523.

Testing

Mechanical Tests

Mechanical tests shall be carried out during manufacture of pipes and fittings as specified in IS 8329 / IS 9523. The frequency and sampling of tests for each batch of pipes shall be in accordance with IS 8329. The test results so obtained for all the pipes and fittings of different sizes shall be submitted to the Contractor or his authorized representative. The method for tensile tests and the minimum tensile strength requirement for pipes and fittings shall be as per IS 8329/IS 9523.

Brinell Hardness Test

For checking the Brinell hardness, the test shall be carried out on the test ring or bars cut from the pipes used for the ring test and tensile test in accordance with IS 1500. The test shall comply with the requirements specified in IS 1500/IS 8329.

(a) Retests

If any test piece representing a lot fails in the first instance, two additional tests shall be made on test pieces selected from two other pipes from the same lot. If both the test results

45

satisfy the specified requirements, the lot shall be accepted. Should either of these additional test pieces fail to pass the test, the lot shall be liable for rejection.

(b) Hydrostatic Test

For hydrostatic test at works, the pipes and fittings shall be kept under test pressure as specified in IS 8329 / IS 9523 for a period of minimum 15 seconds, during which the pipes shall be struck moderately with a 700 g hammer for conformation of satisfactory sound. They shall withstand the pressure test without showing any leakage, sweating or other defect of any kind. The hydrostatic test shall be conducted before surface coating and lining.

Joints

General

Jointing of DI pipes and fittings shall be done as per IS 12288 and manufacturer's recommendations. After jointing, extraneous material, if any, shall be removed from the inside of the pipe. Rubber sealing rings/gaskets used for jointing shall conform to IS 638, IS 12820 and IS 5382.

Spigot and Socket joints

These shall have sockets which are integral with the pipe and incorporate an elastomeric rubber ring gasket conforming to IS 12820.

In particular that the spigot end of the pipe shall be ensured to be jointed is smooth and has been properly chamfered, so that the rubber ring as per IS 12820 and IS 5382 is correctly positioned in line, before the joint is made. The rubber rings and any recommended lubricant shall be obtained only through the pipe supplier.

Gaskets for Flanges

All gaskets used between flanges of pipes shall be of Styrene Butadyne Rubber or EPDM thickness 3 mm suitable for clear water conveyance and as specified by manufacturer.

Flanged joints

These shall be of PN 16 rating and shall comply with dimensions and drilling details as specified in IS 8329. These shall have isolation gaskets between the flanges, isolation sleeves around all bolts and isolation washers under all bolt heads and nuts. All material shall be supplied by a reputed manufacturer. Each bolt should be tightened a little at a time taking care to tighten diametrically opposite bolts alternatively.

Coatings

(a) General

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Unless otherwise specified, DI pipes and fittings shall be coated with Bitumen in accordance with relevant IS specification. All buried DI pipes and fittings shall also have factory or site applied polythene sleeving. Coating shall not be applied to pipe and fittings unless its surface is clean, dry and free from rust. Pipe coatings shall be inspected at site and any damage or defective areas shall be made good.

(b) Coating

Bitumen coating shall be of normal thickness of 75 microns unless otherwise specified. It shall be cold applied compound complying with the requirements of relevant Indian standards, suitable for tropical climates, factory applied in accordance with the manufacturer's instructions.

The outer surface of the pipe shall have Zinc coating with finishing layer of Bitumen over it as per IS 8329.

Damaged areas of coating shall be repainted on site after removing any remaining loose coating and wire brushing any rusted areas of pipe.

(c) Cement mortar lining

All pipes and fittings shall be internally lined with cement mortar in accordance with IS: 8329. Cement mortar lining shall be applied at the factory in conformance with the above mentioned standards. Pipe linings shall be inspected on site and any damage or defective areas shall be made good. Lining shall be uniform in thickness all along the pipe. The minimum thickness of factory applied cement mortar lining shall be 3mm for up to DN 300 mm pipes.

(d) Marking

Marking shall be done as per IS 8329 and IS 9523 or any other relevant IS codes.

10.0 STERILIZATION OF INSTALLATION:

10.1 The water supply installation shall be sterilized as per standards and as follows :-

a) Tanks and pipes shall be filled and flushed out.

b) All bib cocks (taps) shall be closed.

c) Tanks and pipes shall be re-filled while adding a sterilizing admixture containing 50 parts chlorine to one million parts water.

d) When the installation is filled all bib cocks (taps) shall be opened progressively and each allowed to run until the water smells of chlorine.

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e) The installation shall be topped up and more sterilizer added.

f) The installation shall then be left for three hours and shall then be tested for residual chlorine, if none is found, the installation shall be drained and the process repeated.

g) The installation shall be finally drained and flushed with potable water before use.

D) EXTERNAL SEWERAGE & STORM WATER DRAINAGE :

1.0 Scope of Work:

1.1 Without restricting to the generality of the foregoing, the drainage system shall interalia include:

a) Sewerage/Storm water drainage system including, earth works for excavation, disposal, backfilling and compaction, pipe lines, manholes, catch basins and connections to Rain water Harvesting or connected as indicated by the Architect/Consultants.

b) Overflow from Rain Water Harvesting Pit shall be discharged to existing Storm Water drain either by gravity or by submersible

drainage pump.

2.0 General Requirements:

2.1 All material shall be of the best quality conforming to specification and subject to the approval of the Engineer-in-charge.

2.2 Storm Water Drainage lines and open drains shall be laid to the required gradients and profiles.

2.3 All drainage work shall be done in accordance with the local municipal bye-laws.

2.4 Contractor shall obtain necessary approval and permission for the drainage system from the municipal or any other competent authority if required.

2.5 Location of all manholes, catch basin etc shall be got confirmed by the Architect/Consultants before the actual execution of work at site. As far as possible, no drains or sewers shall be laid in the middle of road unless otherwise specifically shown on the drawings or directed by the Architect/Consultants in writing.

3.0 Excavation :

3.1 Alignment and Grade:

The drains are to be laid to alignment and gradients shown on the drawings but subject to such modifications, as shall be ordered by the

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Construction Manager/Consultants from time to time to meet the requirements of the works. No deviations from the line, depths of cutting or gradients of sewers shown in the plans and sections shall be permitted except by the express direction in writing of the Construction Manager/Consultants.

3.2 Opening out Trenches:

In excavating the trenches at the road metaling, pavement kerbing etc are to be placed on one side and preserved for rein statement when the trench or other excavation shall be filled-up.

Before any road metal is replaced, it shall be carefully shifted. The surface of all trenches and holes shall be restored and maintained to the satisfaction of the Construction Manager/Consultants. The contractor shall not cut or break down any live fence or trees in the line of the proposed works but shall tunnel under them unless the Construction Manager/Consultants shall order to the contrary.

The contractor shall scrub up and clear the surface over the trenches and other excavations of all stumps, roots and all other encumbrances affecting execution of the work and shall remove them from the site to the approval of the Construction Manager/Consultants.

3.3 Construction Across the Roads:

All works across the roads shall be carried out as per the directions of the Construction Manager/Consultants.

3.4 Excavation to be taken to proper depth:

The trenches shall be excavated to such a depth that the sewers shall rest as described earlier so that the inverts may be at the levels given on the section/plan. If the strata found as slushy/with block cotton soil etc, the Construction Manager/Consultants may order the contractor to excavate to a greater depth than that shown on the drawings and to fill up the excavation to the level of the sewer with such materials as decided by Construction Manager/Consultants in writing.

3.5 Refilling:

After the sewer or other works have been laid and proved to be water tight, the trench or other excavation shall be refilled. Utmost care shall be taken in doing this, so that no damage is caused to the sewer and other permanent works. Filling in the trenches upto 50 cms above the crown of the sewer shall consist of the finest selected materials placed carefully in 15 cms layers watered to optimum moisture level and consolidated. After this has been laid, the trench and the other excavation shall be refilled

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carefully in 15 cms layers with materials taken from the excavation, each layer being watered and consolidated.

3.6 Contractor shall restore settlement and damages:

The contractor shall at his own cost make good promptly during the whole period the works are in hand, any settlements that may occur in the surfaces or roads, beams, footpaths, gardens, open spaces etc. Whether public or private caused by his trenches or by his other excava-tions and he shall be liable for any accidents caused thereby.

He shall also at his own expense and charges, repair and make good any damage done to the building and other properties.

3.7 Disposal of Surplus Soil:

The contractor shall at his own cost and charge, dispose off from the site all surplus excavated material not required to be used on the works.

3.8 Timbering of Sewer and Trenches:

The contractor shall at all times support efficiently and effectively the sides of the sewer trenches and other excavations by suitable timbering. piling, sheeting, etc in loose or sandy strata and below the surface of the sub soil water table without extra cost.

All timbering, sheeting and piling with their walls and supports shall be of adequate dimensions and strengths and fully broad and strutted so that there is no risk of collapse or carrying in the walls of the trench.

The Contractor shall be held accountable and responsible for the sufficiency of all timbering, bracing, sheeting and piling used, and for all damage to persons and property resulting from the improper quality, strength, planning, maintaining or removing of the same.

3.9 WIDTH OF TRENCH :

a) Recommended width of trenches at the bottom shall be as follows or as specified in the CPWD /BIS specification :-

100mm dia pipe Outer dia of pipe + 45cms

150mm dia pipe Outer dia of pipe + 45cms

200-250 dia pipe Outer dia of pipe + 45cms

300mm dia pipe Outer dia of pipe + 45cms

450mm dia pipe & above outer dia of pipe +45cms

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b) Recommended width of trench at top shall be as follows or as specified in the CPWD /BIS specification :-

Depth up to 1.5m - width of Bottom = width of top

Depth from 1.5m to 3m - Bottom width + (2X500mm)

Depth From 3m to 4.5 m - Bottom width +(4X500mm)

Depth From 4.5m to 6.0 m - Bottom width + (6X500mm)

3.10 Protection of Existing Services:

All pipes, water mains, cables etc encountered in the course of excavation shall be carefully protected and supported.

4.0 SALT GLAZED STONEWARE PIPES :

4.1 Stoneware pipes shall be of first class quality salt glazed and free from rough texture, inside and outside and straight. All pipes shall have the manufacturers name marked on it and shall comply to IS : 651-1971.

4.2 Laying:

The pipes shall be carefully laid to the levels and gradients shown on the plans and sections.

4.3 Jointing:

Hemp rope soaked in neat cement wash shall be passed round the joint and inserted in it by means of caulking tool. More skein of yarn shall be added and rammed home. Cement mortar with one part of cement and one part of sand and with minimum water content but on no account soft or sloppy, shall be carefully inserted, punched and caulked into the joint and more cement mortar added until the space of the joint has been filled completely with tightly caulked mortar. The joint shall then be finished off neatly outside the socket at an angle of 45 degree.

4.4 Curing:

The joint shall be cured for atleast seven days.

4.5 Testing:

All lengths of the sewer and drain shall be fully tested for water tightness by means of water pressure maintained for not less than 30 minutes. Testing shall be carried out from manhole to manhole. All pipes

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shall be subjected to a test pressure of atleast 3.0 metres head of water at the highest point of the section under test. The pipes shall be plugged preferably with standard drain plugs (with rubber rings) on both ends. The upper end shall, however, be connected to a pipe for filling with water and getting the required head.

The contractor shall give a smoke test to the drains and sewers at hisown expense and charges, if directed by the ConstructionManager/Consultants.

4.6 Gully traps :

4.6.1 Gully traps shall be of the same quality as described for stoneware pipes under para Salt Glazed Stoneware Pipes.

4.6.2 Gully traps shall be fixed in cement concrete 1:4:8 mix and a masonary chamber 300 x 300 mm. The CI sealed cover and frame shall weigh not less than 7.3 kg. Where necessary, sealed cover shall be replaced with

CI grating of the same size.

5.0 Reinforced Cement Concrete Pipes :

5.1 All underground storm water drainage pipe shall be centrifugally spun S & S RCC Pipe of specified class. Pipes shall be true and straight with

uniform bore, through out cracked, wrapped pipes shall not be used on the work. All pipes shall be tested by the manufacturer and the Contractor

shall produce, when directed a certificate to that effect from the manufacturer.

5.2 Laying of R.C.C. Pipes:

Loading, transporting and unloading of concrete pipes shall be done with care. Handling shall be such as to avoid impact. Gradual unloading by inclined planes or by chain block is recommended. All pipe sections and connections shall be inspected carefully before being laid. Broken or defective pipes or connections shall not be used. Pipes shall be lowered into the trenches carefully. Mechanical appliances may be used. Pipes shall be laid true to line and grade as specified. Laying of pipe shall proceed upgrade of a slope.

If the pipes have spigot and socket joints, the socket end shall face upstream, in the case of pipe with joints to be made with loose collars, the collars shall be slipped on before the next pipe is laid. Adequate and proper expansion joints shall be provided where directed.

In cases where the natural foundation is inadequate, the pipes shall be laid either in concrete cradle supported on proper foundation or on any other suitable designed structure as specified. If a concrete cradle bedding is used, the depth of concrete below the bottom of the pipe shall extend up the sides of the pipe at least to distance of 1/4th of the outside diameter of pipe. The pipe shall be laid in this concrete bedding before the concrete has set.

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When the pipe is laid in a trench in rock hard clay, shale or other hard material, the space below the pipe shall be excavated and replaced with an equalizing bed of concrete, sand or compact earth. In no place shall pipe be laid directly on such hard material.

When the pipes are laid completely above the ground, the foundations shall be made even and sufficiently compacted to support the pipe line without any material settlement. Alternatively the pipe line shall be supported on p.c.c. saddle blocks. Similar arrangement shall be made to retain the pipe line in the proper alignment, such as by shaping the top of the supports to fit the lower part of the pipe. The distance between the supports shall in no case exceed the length of the pipe. The pipe shall be supported as far as possible close to the joints. In no case shall the joints come in centre of the span. Care shall be taken to see that superimposed loads greater than the total load equivalent to the weight of the pipe when running full shall not be permitted.

5.3 Jointing of Pipes:

Joints are generally of rigid type. Where specified flexible type joints may also be provided.

5.4 Spigot and Socket Joint (rigid):

The spigot of each pipe shall be slipped home well into the socket of the pipe previously laid and adjusted in the correct position. The opening of the joint shall be filled with stiff mixture of cement mortar in the propor-tion of 1:2 (1 cement :2 fine sand) which shall be rammed with caulking tool.

After a day's work any extraneous material shall be removed from the inside of the pipe and the newly made joint shall be cured.

5.5 Collar Joint (rigid):

The two adjoining pipes shall be butted against each other and adjusted in corrected position. The collar shall then be slipped over the joint, covering equally both the pipes. The annular space shall be filled with stiff mixture of cement mortar 1:2 (1 cement :2 fine sand) which shall be rammed with caulking tool.

After a day's work any extraneous material shall be removed from theinside of the pipe and the newly made joint shall be cured.

5.6 The Testing of Joints, Refilling of Trenches:

The testing of joints, refilling of trenches for concrete pipes shall be similar to Specification for stone ware pipes.

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6.0 Cement Concrete for Pipe Support :

a) Wherever specified or shown on the drawings, all pipes shall be supported on a bed, all around or in haunches. The thickness and mix of the concrete shall be as given in the Schedule of Quantities. Width of the bedding shall be under para Width of Trenches.

b) Unless otherwise directed by the Architect/Consultants cement concrete for bed, all around or in haunches shall be laid as follows:

Upto 1.5 m Depth Upto 3 m Depth Beyond 3 m Depth

StonewarePipes in

open ground (no sub soil water)

All round (1:5:10) In haunches (1:5:10) In haunches (1:5:10)

RCC or SW in sub soil water All round (1:5:10) In haunches (1:5:10) In haunches (1:5:10)CI Pipes (in all conditions) All round (1:3:6) In haunches (1:3:6) In haunches (1:3:6)

RCC Pipes or CI pipes under building All round (1:3:6) In haunches (1:3:6) In haunches (1:3:6)

(1=Cement, 3/5=Coarase sand, 6/10 =Stone aggregate 40 mm nominal size)

c) RCC pipes or CI pipes shall be supported on brick masonry or precast RCC or in situ cradles as shown on the drawings or as directed by the Architect/Consultants.

d) Pipes in loose soil or above ground shall be supported on brick or stone masonry pillars as shown on the drawings or as directed by the Architect/Consultants.

7.0 Manholes and Chambers :

7.1 All manholes, chambers and other such works as specified shall be constructed in brick masonry in cement mortar 1:5 (1 cement: 5 coarse sand) or as specified in the Schedule of Quantities.7.2 All manholes and chambers, etc shall be supported on base of cement concrete of such thickness and mix as given in the Schedule of ] Quantities or shown on the drawings.

7.3 Where not specified, manholes shall be constructed as follows:

(All dimensions are clear internal dimensions in mm)

Size of Manholes Type of Manhole 900x800Rect.

1200x900Rect.

910 diaCircular

1520 diaCircular

Maximum Depth 1000 2400 2500 5000Average thickness of RCC slab 150 150

Reinforcement As directed by Architect/ConsultantsSize of Cover and Frame 600x450 560dia 560dia 560dia

Weight of CI/SFRC Cover and Frame38 kg light duty208 kg heavy duty208 kg heavy duty208 kg heavy duty

7.4 All manholes shall be provided with cement concrete benching in 1:2:4

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nominal mix (1 cement: 2 coarse sand: 4 stone aggregate 20mm nominal size). The benching shall have slope of 1:10 towards the channel. The

depth of the channel shall be full diameter of the pipe. Benching shall be finished with a floating coat of neat cement.

7.5 All manholes shall be plastered with 12/15mm thick cement mortar 1:3 (1 cement: 3 coarse sand) and finished with a floating coat of neat cement inside. Manhole shall be plastered outside as above but with rough plaster with waterproofing compound.

7.6 All manholes with depths greater than 1m shall be provided with 20 mm square or 25 mm round CI foot rests set in cement concrete blocks 250x100 mm in 1:2:4 mix (1 cement: 2 coarse sand: 4 stone aggregate 20 mm nominal size), at 300 mm centre to centre vertically and staggered. Foot rests shall be coated with coal tar before embedding.

7.7 All manholes shall be provided with cast iron covers and frames and embedded in reinforced cement concrete slab. Weight of cover, frame and thickness of slab shall be as specified in the Schedule of Quantities or given above.

8.0 Testing :8.1 All testing shall be done in accordance with IS:1172 and IS:5329 except

as may be modified herein under.

8.2 All lengths of the sewer/drain/pipelines shall be fully tested for water tightness by means of water pressure. Testing shall be carried out from manhole to manhole. All pipes shall be subjected to a test pressure of at least 2.5m head of water. The test pressure shall, however, not exceed 6m head at any point. The pipes shall be plugged preferably with upper end shall, however, be connected to a pipe for filling with water and getting the required head. The sewer/drain/pipeline shall be filled with water and left to stand for 2 hours and topped up. The leakage over 30 minutes shall then be measure and the loss in water shall not exceed 2 litres/cm of diameter/km of pipeline measured during the last 10 minutes of the period of test.

8.3 Sewer lines shall be tested for straigheness by:a) Inserting a smooth ball 12mm less than the internal diameter of the

pipe. In the absence of obstructions such as yarn or mortar projecting at the joints the ball should roll down the invert of the pipe and emerge at the lower end,

b) means of a mirror at one end and a lamp at the other end. If the pipe line is straight the full circle of light shall be seen otherwise obstruction or deviation shall be apparent.

8.4 A test register shall be maintained which shall be signed and dated by the Contractor and the Architect/Consultants.

8.5 The pipeline shall be covered only after the testing is successfully completed.

9.0 Measurement and Rates :

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9.1 Stoneware/RCC/CI pipes shall be measured for the finished length of the pipeline per linear metre.

Lengths between manholes shall be recorded from inside face of one manhole to inside face of other manhole.

Length between gully trap and manhole shall be recordedbetween socket of pipe near gully trap and inside face of

manhole. Rate shall include all items given in the Schedule of Quantities and specifications.

9.2 Gully Traps : Gully traps shall be measured by the number and rate shall include

all excavation, backfilling, foundation, concrete brick masonry, cement plaster inside and outside, CI grating and sealed cover and

frame etc complete.

9.3 Manholes :a) All manholes shall be measure by numbers and shall include all

items specified above and necessary excavation in all types of soils, refilling, compaction and disposal of surplus earth.

b) Manholes with depths greater than that specified under the main items shall be paid for under “extra depth” and shall include all items as given for manholes. Measurement shall be done to the nearest centimetre. Depth of the manholes shall be measured from top of the manhole cover to bottom of channel.

10.0 Reference Standards

National Building Code of India - 2005 SP 35 : 1987 Handbook on Water Supply and Drainage CPHEEO Manual Delhi By-Laws (Relevant Local Bylaws) Following Relevant Bureau of Indian Standards as amended up to

30th April, 2003 and other International Standard

1. General

BIS : 779 Specification for water meters (domestic type).

BIS : 1172 Code of Basic requirements for water supply drainage and sanitation.

BIS : 1367 (Part 1) Technical supply conditions for threaded steel fasteners: Part 1 introduction and general information.

BIS : 2470 (Part 1) - 1985 Reaffirmed 2001

Code of Practice for installation of septic tanks

BIS : 1742 Code of practice for building drainage.

BIS : 2064 Selection, installation and maintenance of sanitary

56

appliance code of practice.

BIS : 2065 Code of practice for water supply in buildings.

BIS : 2104 Specification for water meter for boxes (domestic type)

BIS : 2373 Specification for water meters (bulk type)

BIS : 4111 (Part 1) Code of practice for ancillary structures in sewerage system: Part 1 manholes.

BIS : 5329 Code of practice for sanitary pipe work above ground for buildings.

BIS : 8419 (Part 1) Requirements for water filtration equipment: Part 1 Filtration medium sand and gravel.

BIS : 8419 (Part 2) Requirements for water filtration equipment: Part 2 under drainage system.

BIS : 9912 Coal tar based coating materials and suitable primers for protecting iron and steel pipe lines.

BIS : 10500 Drinking water – Specification

BIS : 12183 (Part 1)

Code of practice for plumbing in multi-storeyed buildings: Part 1 water supply.

BIS : 12251 Code of practice for drainage of building basements.

BIS : 5572 Code of practice for sanitary pipe work.

BIS : 6700 Specification for design, installation, testing and maintenance of services supplying water for domestic use within buildings and their cartilages.

BIS : 6700 Code of practice for Installation of Septic tanks

BIS : 8301 Code of practice for building drainage.

5. Pumps & Vessels

BIS : 1520 Specification for horizontal centrifugal pumps for clear cold fresh water.

BIS : 5600 Specification for sewage and drainage pumps

BIS : 8034 Specification for submersible pump sets for clear, cold, fresh water.

BIS : 8418 Specification for horizontal centrifugal self priming pumps.

Pipes and Fittings

BIS : 458 Specification for pre-cast concrete pipes (with and without reinforcement)

BIS : 651 Salt glazed stone ware pipes and fittings.

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BIS : 1536 Centrifugally cast (spun) iron pressure pipes for water, gas and sewage.

BIS : 1537 Vertically cast iron pressure pipes for water, gas and sewage.

BIS : 1538 Cast Iron fittings for pressure pipes for water, gas and sewage.

BIS : 1729 Sand Cast iron spigot and socket soil, waste and ventilating pipes, fittings and accessories.

BIS : 1879 Malleable cast iron pipe fittings.

BIS : 1978 Line pipe

BIS : 1979 High test line pipe.

BIS: 4984 High Density Polyethylene Pipes for potable water supply and Sewage etc.

BIS : 2643 (Part 1) Dimensions for pipe threads for fastening purposes: Part 1 Basic profile and dimensions.

BIS : 2643 (Part 2) Dimensions for pipe threads for fastening purposes: Part 2 Tolerances.

BIS : 2643 (Part 3) Dimensions for pipe threads for fastening purposes: Part 3 Limits of sizes.

BIS : 3468 Pipe nuts.

BIS : 3989 Centrifugally cast (spun) iron spigot and socket soil, waste and ventilating pipes, fittings and accessories.

BIS : 4346 Specifications for washers for use with fittings for water services.

BIS : 4711 Methods for sampling steel pipes, tubes and fittings.

BIS : 6392 Steel pipe flanges

BIS : 6418 Cast iron and malleable cast iron flanges for general engineering purposes.

BIS : 7181 Specification for horizontally cast iron double flanged pipe for water, gas and sewage.

Valves

BIS : 778 Specification for copper alloy gage, globe and check valves for water works purposes.

BIS : 780 Specification for sluice valves for water works purposes (50 mm to 300 mm size).

BIS : 1703 Specification copper alloy float valves (horizontal plunger type) for water supply fittings.

BIS : 2906 Specification for sluice valves for water works purposes (350 mm to 1200 mm size)

BIS : 3950 Specification for surface boxes for sluice valves.

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BIS : 5312 (Part 1) Specification for swing check type reflux (non return) valves: part 2 Multi door pattern.

BIS : 5312 (Part 2) Specification for swing check type reflux (non return) valves: part 2 Multi door pattern.

BIS : 12992 (Part 1)

Safety relief valves, spring loaded : Design

BIS : 13095 Butterfly valves for general purposes

Water Heaters

IS 2082 : 1993 Stationary storage type electric water heaters – specifications

Pipes and Fittings

EN 1057( Formerly BS 2871), Table ‘X’

Specification for Copper Pipes

EN 1254-1( Formerly BS 864 : Part 2)

Specification for Copper Fittings

ASTM D 2846 5 CPVC Pipes and Fittings

ASTM F 493 CPVC solvent cement

WHO Standard For Drinking water Quality

4. PARTICULAR TECHNICAL SPECIFICATION FOR FIRE FIGHTING AND PREVENTION SYSTEMS

01.00 PORTABLE FIRE EXTINGUISHERS.01.01 All the portable extinguishers shall be of free standing type and shall be

capable of discharging freely and completely in upright position. Each extinguisher shall have the instructions for operating the extinguisher on its body itself and shall be supplied with initial charge with accessories as required.

01.02 Portable type extinguishers shall be provided with suitable clamps for mounting on walls or columns and shall be painted with durable enamel paint of fire red colour, conforming to relevant Indian standards or NFPA standard 10.

01.03 The Water CO2 type extinguisher shall comprise of suitable thickness sheet body coated with leaded tin alloy internally and externally (by electrolytic deposition process), an inner container, a CO2 gas cartridge, a plunger rod for CO2 release and other accessories. It shall conform to IS:940.

01.04 Foam type extinguisher shall comprise of suitable thickness sheet steel body coated with leaded tin alloy internally and externally (by electrolytic disposition process), inner receptacle of lead coated brass, polished gun metal fittings with a locked handle. It shall conform to IS:10204

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01.05 Carbon-di-oxide type extinguisher shall comprise of high pressure steel cylinder body with wheel type valve, braided reinforced hose, non-conducting horns and accessories, wheeled trolley or mounting clamp, etc. It shall conform to IS:2878.

01.06 Dry chemical extinguisher shall comprise of suitable thickness sheet steel body coated with leaded tin alloy internally and externally (by electrolytic deposition process), an inner container, a carbon-di-oxide gas cartridge, a plunger rod for carbon-di-oxide release, a high pressure hose, a nozzle, a nozzle holder, wall mounting brackets and other accessories. It shall confirm to IS:2171. The powder shall confirm to IS:4861 or IS:4308.

01.07 Any other kind of portable fire appliances provided shall confirm to NFPA standard 10 and of approved make.

02.00 FIRE WATER PUMP02.01 The pump shall be of horizontal centrifugal type and designed for continuous

operation at its best efficiency point. The pump shall have continuously rising head characteristic from operating point towards shut-off. The drive unit of the

pump shall be suitably rated, so that the same can take the load of full open condition. The pump set alongwith its drive unit shall run smoothly without

undue noise and vibration. Parts of pump like impeller, shaft sleeve, wearing ring etc. shall be of non-corrosive metal.

02.02 Under certain conditions, there may be occasions when fluid flow through the pump would be reversed, as in case of loss of power to the pump drive. The pump should be so designed that the impellers and other accessories are not damaged under such conditions of flow reversal. The coupling between pump and motor shall be of pin bush type.

03.00 ELECTRIC MOTOR.03.01 Notwithstanding anything stated in this specification, the motor has to satisfy

the requirement of the mechanical system during normal and abnormal conditions. All induction motors shall be of squirrel cage type and shall conform to the latest applicable Indian Standard (IS:325) & IEC.

03.02 The motors shall be suitable for continuous duty in the specified ambient temperature and the enclosure shall be dust proof as per IS:4691and equivalent to IP-22 (for Motor above 15 KW) or IP-54 (for Motor 15KW & below). The starting current of the motor at rated voltage shall not exceed six (6) times the rated full load current subject to tolerance as given in IS:325.

04.00 PUMP STARTING PANEL.04.01 The panel should be of free standing floor / wall mounting consols as required

and out of CRCA sheet steel. Suitable terminal blocks shall be provided for termination of external cable / wires. The panel feature shall be able to match the system description or philosophy for water based fire protection system.

04.02 The panel shall be suitable to accept electric feeding of 440 ( + 10% ) Volts, 3 phase & 50HZ ( + 5% ) A.C. supply. The panel shall have the visual indication for power supply and of pump status. The starting interlock of the pump motor shall meet the system philosophy. The starter for Fire Pump shall be of Star-Delta type and that of Jockey Pump shall be of D.O.L. type.

04.03 The make of components and SLD of the panel shall be in accordance with the approval of Purchaser / Architect / Consultant.

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05.00 HYDRANT / LANDING VALVE.05.01 The Hydrant Valve (Alloy Steel) should conform to IS:5290 type ‘A’ and

should be suitable for indoor or outdoor installation. The hydrant valve must be completed in all respect i.e. with blank cap & chain. It should have flanged inlet suitable for 80mm Nb and oblique type female instantaneous coupling outlet of 63mm size to receive male coupling as per IS:903.

06.00 PIPING06.01 Mild Steel Black Pipe should be as per IS:1239, Part-I, medium grade /

IS:3589 (6mm thick). The complete piping system should withstand hydraulic test pressure equal to 1.5 times of maximum working pressure. Piping to be laid overground shall be supported properly on wall / column / beam /floor to suit site condition. Piping to be buried under ground shall be provided with protection of the outer surface, against soil corrosion by using one wrap of 3mm thick anticorrosion tape.

06.02 Outer surface of overground pipes shall be thoroughly cleaned of mill scale, rust etc. by wire brush, there after, one coat of red lead primer shall be applied. Finally two coats of synthetic enamel paint of approved colour shall be applied.

07.00 BRANCH PIPE WITH NOZZLE07.01 The Branch Pipe (Alloy Steel) with Nozzle should conform to IS:903. The

branch pipe should have male inlet connection of 63mm size at one end and other end should be threaded with a nozzle of 18mm bore.

08.00 HOSE WITH COUPLING.08.01 63mm size controlled percolation hose should conform to IS:8423 / IS:636 and

of 7.5M/15M long. Both the end of the hose should be properly riveted and G.I. wire bounded with pair of male & female Alloy Steel Hose Coupling as per IS:903.

09.00 FIRE SERVICE INLET (4 -WAY / 3 -WAY).09.01 Fire Service Inlet connection should generally conform to IS:904 and complete

with four / three 63mm dia instantaneous type gunmetal inlets with builts in check valves and 150mm Nb / 100mm Nb connection for installation with the fire main.

10.00 SWINGING HOSE REEL.

10.01 First aid fire fighting swinging Hose Reel should conform to IS:884 and complete with reputed make 20mm dia rubber hose of 30 M / 33 M. long. It should be powder coated and should be complete in all respect i.e. with swivel joint, nozzle, etc.

11.00 SLUICE VALVE / GATE VALVE11.01 Valves 40mm and below shall be heavy pattern gunmetal valves with cast iron

wheel tested to 16 Kg./Cm2 pressure. Valves shall be leader or equivalent make.

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11.02 Sluice Valves 50mm and above shall be cast iron double flanged with non rising spindle. Sluice valves below ground shall be provided with suitable valve chamber. Sluice valves in exposed locations i.e. pumps house etc. shall be provided to with cast iron wheels. Sluice valves shall conform to IS:14846 class PN 1.0 / PN 1.6. Sluice valves shall be of approved make.

12.00 BUTTER FLY VALVE.12.01 The valve shall be of cast iron double flanged with lever operated. The valve

shall generally conform to IS: 13095, Class PN 1.0 / PN 1.6 and shall be of approved make.

13.00 NON-RETURN VALVE13.01 Non-Return valve shall be of cast iron double flanged & Swing Check type.

The valve should have a permanent “ Arrow ” inscription on its body to indicate direction of flow of water. The valve shall generally conform to IS: 5312. The pressure rating of the valve shall be in accordance with the system design and the make shall be of approved type.

14.00 ANALOGUE ADDRESSABLE TYPE FIRE ALARM SYSTEM.

The fire detection and alarm system shall be designed to facilitate accurate identification of the source of heat / smoke / fire in their early stages to minimize occurrences of false alarms due to faulty equipments, electrical transients, system faults etc.

Facilities are provided to constantly monitor and check the following circuits and fault conditions :

The power supply to the loop/sFor open-circuit, short-circuit, earth fault and any other fault condition in the loop wiring For communication failure and errors in all cards and loops.For faults in keyboard.Monitoring of all devices status to create a table of each 1 analogue channel for event analysis

All devices i.e. Detectors, MCP’s, etc. shall be installed on the same loop.

Any event i.e. Fire, fault or warning shall be recorded with time, date and place of occurrence in the memory of FACP.

Provision shall be done at the fire alarm control panel to silence the alarm sounders but the visual indication shall remain until the system is reset.

The main fire alarm control panels shall be located either in the Control Room or at the Ground Floor. The main FACP shall be capable of accommodating 99 detectors and 99 devices per loop.

All major component of fire alarm system shall be product of a single manufacturer and shall conform to the requirement of EN 54 / NFPA 72, LPCB / UL approved and be designed in line with EN 54, BS 5839, NFPA 72 Fire alarm systems CODE OF PRACTICE FOR SYSTEM DESIGN, INSTALLATION AND SERVICING. The power supply breakers for FDA system shall be marked “ DO NOT DISCONNECT FIRE ALARM SUPPLY ”

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The Fire Alarm System consists of the following elements.

1) Analogue Addressable Photo-Electric Smoke Detectors for the above and below false ceiling areas pertaining to Meeting Rooms, Cabins, Stores, Offices, Open Work-station areas and areas alike.

2) Analogue Addressable Thermal Detectors to detect unusual rate of rise of temperature for Basement areas, Electrical installation areas, Kitchen, Pantries and areas alike.

3) All fire sensors shall mount on a common base to facilitate the changing of sensor type if building conditions change.

4) If the Fire Alarm Panel determines that the sensor is in alarm, the Fire Alarm Panel shall command the sensor LED to remain on to indicate alarm.

5) Each sensor shall be capable of being tested for alarm via command from the Fire Alarm panel.

6) Each sensor shall respond to Fire panel scan for information with its type identification to preclude inadvertent substitution of another sensor type. The Fire Alarm panel shall operate with the installed type but shall initiate a mismatch (trouble) condition until the proper type is installed or the programmed sensor type changed.

7) Each sensor shall respond to Fire Alarm Panel scan for information with an analogue representation of measured fire related phenomena (smoke density, particles of combustion, temperature). Such response proves end-to-end sensor including the operation of the sensor electronics.

8) The detector shall meet the requirements of either EN 54 or shall be listed with LPCB. It shall be possible to test the detector’s working both from the panel as well as locally by means as designed by the Contractor and approved by the Engineer-in-charge. The approved coverage per detector for unhampered areas shall not be less than 50 Sq. M. The detector shall be capable of being reset automatically after any alarm condition.

9) Addressable Manual Call Points are proposed to be installed at each Exit Staircase, Lobby areas on each floor to comply with relevant standard / norms or recommendation of local fire brigade authority.

10) Each device shall be assigned a unique address via easily understood decade (01 to 99) switch. Address selection via binary switches or by jumpers is not acceptable. Devices that take their address from their position in the circuit are unacceptable because if devices are later added, existing addresses, descriptors and commands need to be reprogrammed.

11) Each device shall contain screw terminals with rising plates for positive termination suitable for 1.5 Sq.mm. copper conductor wire.

12) The Fire Panel shall be capable of displaying the address of the occurrence of the smoke and shall be capable of activating Hooters. It shall have the provision for external actuation like ventilation fan control, fire damper control, if any and system should provide Open Protocol in case connectivity is required with BMS (Building Management System).

It shall be possible to program the Fire Panel such that meaningful alphanumeric descriptions can be assigned to each Detector Address. This shall be useful

in identifying the location of Fire very quickly and easily.

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13) It is important to note the ESSENTIAL REQUIREMENT from the system mentioned as under. As it has been stated the SYSTEM REQUIREMENT ARE ESSENTIAL IRRESPECTIVE OF WHETHER ANY OF THE DEVICES OR COMPONENTS MENTIONED ARE PRESENTLY BEING USED AS PER BILL OF MATERIAL / QUANTITY OR A FUTURE REUQIREMENT.

Every detector should be loop powered and addressable by itself.Every Manual Call point should be loop powered and addressable by itself.Every Sounder / Hooter should be loop powered and addressable by itself.

Every Linear Beam Detector should be loop powered and addressable by itself.Every Zone Monitor Interface (for connecting to Conventional detectors and Devices) should be loop powered and addressable by itself.No separate power supply should be used for the Sounders / Hooters which are supposed to be only loop powered. The system thus is general will be based on only loop cable.No separate Addressable interface unit / module should be used for the Sounders / Hooters which are supposed to be self Addressable type.

No separate Addressable interface unit / module should be used for the Zone Monitor Interface (for connecting to Conventional detectors and Devices) which are supposed to be self Addressable type.Every Module in general Monitor module, Mini / Micro Monitor Module, Control Module, Isolator Module etc. should be loop powered and addressable by itself.Panel configuration should strictly follow EN – 54 in terms of failure of devices if quantity are more than 512.

The alarm sounder shall consist of necessary solid state electronic circuit or printed circuit card, suitable to accept impulse from fire alarm panel. If required, necessary line matching transformer shall also be included with the sounder. The speaker of the sounder shall preferably be housed in a suitable box.

15.00 P.A. SYSTEM 15.01 Suitable Public Address System comprising micro phone & amplifier unit shall

be coupled with the fire alarm system in such a way that the P.A. System will come into operation in case of fire alarm, having the manual override facilities.

16.00 SAFETY SIGNAGE (EXIT SIGN WITH ARROW / FLOOR NUMBER & FIRE ORDER)16.01 The “Exit” Board & “Arrow” marking to indicate direction of escape route

shall be of size 150mm X 300mm & 150mm X 150mm and Floor Number shall be of size 150mm X 200mm. The signage shall be of Photoluminescent nature. The signage shall get charged from the existing light present in the area and shall come alive to glow as soon as the light goes out by the luminous crystals containing mainly zinc sulphide in protective glass-like shell which is non toxic & non radioactive or non hazardous. The intensity of glow in the dark of the said signage shall decrease continuously but should last not less than 4 hours and strongest glow should produce during first 30 minutes of darkness.

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16.02 The Fire Order should be on Acrylic sheet of approximate size 450mm X 300mm. The Fire Order / Notice should be printed by bright lettering.

IT WILL BE RESPONSIBILITY OF THE CONTRACTOR TO OBTAIN NOC FROM DIRECTORATE OF FIRE SERVICES AFTER SATISFACTORY EXECUTION OF THE WORK.

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CODES & STANDARDS.

All the systems and equipments within the scope of this tender shall be of reputed proven makes, designed and manufactured in accordance with the stipulations of latest versions of Indian Codes or recommendations of W.B.F.S / T.A.C. / F.O.C. / N.F.P.A.

When an equipment is offered conforming to standards other than those listed below, it shall be clearly brought in Schedule of Deviation .

01. IS:1646 : Code of practice for fire safety of building (general), Electrical Installations.

02. IS:1648 : Code of Practice for fire safety of buildings (general), Fire Fighting Equipment and its Maintenance.

03. IS:3034 : Code of Practice for Fire of Industrial Buildings, Electrical Generating and Distributing Stations.

04. IS:884 : First Aid Hose Reel for Fire Fighting ( For Fixed Installations).

05. IS:2171 : Portable Fire Extinguisher, Dry Powder Type.06. IS:2878 : Portable Fire Extinguishers, CO2 type.07. IS:1239 : Part - I : Mild Steel Tubes (upto 150mm).

Part - II : Mild Steel tubulars and other wrought steel pipe fittings.

08. IS:778 : Gunmetal gate, globe and check valves for general purposes.

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09. IS:13095 : Butter Fly Valve.10. IS:14846 : Sluice Valve for water works purposes (50 to 1200mm size) –

Specification.11. IS:5312 : Swing Check type Reflux (Non-Return) Valves.12. IS:940 : Portable Fire Extinguisher ,Water CO2 Type.13. IS:10204 : Portable Fire Extinguisher, Foam Type.14. IS:2190 : Code of practice for selection, installation and maintenance of

portable First - Aid Fire Appliances.15. IS:1520 : Horizontal Centrifugal Pumps for clear, cold and fresh water.16. IS:5290 : Landing / Hydrant Valve. 17. IS:8423 : Controlled Percolation Hose for fire fighting.18. IS:903 : Fire Hose Delivery Couplings, Branch Pipe, Nozzles & Nozzle

spanner.19. IS:2062 : Structural Steel (Fusion / Welding Quality ).20. IS:325 : Three Phase Induction Motor.21. NBC : National Building Code, Chapter – IV (Amendment No.3,

January 1997).22. IS:2189 : Code of practice for selection, installation and maintenance of

Automatic Fire Detection and Alarm System.23. IS:732 : Code of practice for electrical wiring installations.24. IS:2217 : Recommendations for providing first aid fire fighting

arrangements in public buildings.25. IS:3844 : Code of practice for installation of internal fire hydrant in

multistoried buildings.26. IS:3589 : Mild Steel Tubes (200mm and above).

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APPROVED LIST OF MATERIALS

SL.No NAME OF ITEMS LIST OF APPROVED MANUFACTURERS / BRAND / APPLICATORS

CIVIL1 Cement Ultra-Tech, ACC, Grasim,

Lafarge2 Reinforcement Bars Fe500 grade of TATA, SAIL,

RINL3 White Cement Birla, J.K4 Ceramic Floor Tiles Premium quality NITCO,

JOHNSON, VERMORA5 Ceramic Tiles for Dado Premium NITCO, JOHNSON,

VERMORA, Bell6 Vitrified/ Rectified Tiles Premium Quality NITCO,

JOHNSON, VERMORA7 Glass Mosaic Tiles Italia, Lamosaic, Littleglass8 Float Glass Modi/ Saint Gobin/ Indo-Asahi9 Concrete Interlocking Pavement

Tiles and Concrete Paver BlockWondercrete, Eurocon, AP Galaxy, Ultra, Stylish Interlocking Pvt. Ltd.

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10 Flush Door Centurydoor, Greenply flush door, Truwood door, Duradoor, Sarda

11 Block Board/Prelaminated particle board/ Plywood/ decorative veneers

Kit ply, Sarda Ply, Greenply, Uro ply

12 FRP Doors Dolphin Foam Industries or equivalent

13 Cylindrical locks/ locks Godrej/ Aligarh lock store/ Ramson

14 Extruded Aluminium sections (unless otherwise specified in BOQ)

INDAL, JINDAL,HINDALCO

15 Aluminium Composite Panel Alstrong, Aluco-bond, Aludecor, Durabuild

16 Al door, window, partition system Domal, Shuko or equivalent17 Structural glazing system WICONA, Shuko or equivalent18 Reflective Glass for glazing AIS, Saint Gobian, Pilkington19 Acoustic Panel Techno-acoustic panel of

Chanyaka Technologies India pvt ltd or equivalent

20 Minarel board false ceiling Armstrong/ AMF / OWA21 Gypsum false ceiling Gypsum India Ltd.22 E-grid classic false ceiling Everest23 Metal false ceiling system Hunter Doglus or equivalent24 E-glass AIS, Pilkington, Sejal25 Vertical Blinds Classic/ Hunter Doglus26 Autometic Sliding gate Godrej (to be executed by

authorized vendor of Godrej)27 Laminated flooring system Pergo or equivalent28 High pressed Clay tiles SBTC, confetti export29 Wall coverings (interior) Elimento lifestyle pvt. Ltd or

equivalent.30 UPVC rain water pipes with fittings Oriplast, Supreme.31 Polysulphide Sealant Choksey, Sika Qualcrete,

Degussa, Fosroc32 Polycarbonate Sheet GE Plastic or Equivalent33 Exterior type acrylic based paint Excel of Nerolac, Weathercoat

of Berger, or equivalent of ICI, Apex

34 Distemper Asian Paint, Berger, ICI, Nerolac

35 Plastic emulsion Paint Premium emulsion of Asian Paints, Delux acrylic emulsion of ICI, Rangoli fashion of Berger, Allscape of Nerolac

36 Synthetic Paint Asian Paint, Berger, ICI, Nerolac

37 Zinc Chromate Primers Shalimar, Asian Paint, Berger, ICI

38 Glass Modi/ Saint Gobin/ Asani39 Chemical / Mechanical Anchor

FastnersHILTI, FISCHER

40 Hydrolic door closer Hardwyn make (Eddy) or equivalent

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41 Floor spring for aluminium door Hardwyn, Garnish42 Fittings for Aluminium doors and

windows.Ebco, Doorline

43 Water Proofing Compound/ Admixtures

Choksey, Sika Qualcrete, Degussa, Fosroc

44 Epoxy Grout for tile fixing Laticrete, Bal endula, Sika or equivalent.

45 Specialist vendor for spider glazing works, ACP works

Ajit (India) Pvt. Ltd, Aline Curtain Walls Pvt Ltd., Alunilite Pvt Ltd.

46 Modular Furnitures, Modular Partions , Chairs etc.

Featherlite, Godrej, Blowplast

SANITARY ITEMSSanitary Fittings and Fixtures:

1 Porcelain Goods(Vitreous China and Fire Clay Sanitaryware)

Parryware,Hindustan Sanitaryware,

2 PVC Cistern (with all fittings and accessories):

Parryware, Commander

3 Plastic Seat Covers with frame Parryware, Commander4 CP on brass fittings and

AccessoriesEssco (Delux model/series), Jaquar ( Continental series), Grabtree aqualine (Maple series)

5 Stainless-Steel Sinks (with or without drain-board and having integrated waste fittings)

Nirali, AMC, Parryware

Soil Pipes and Fittings:6 Centrifugally Cast (spun) Iron Pipes

& fittingsRIF, BIG, NECO or approved equivalent make conforming to IS: 3989

7 Sand Cast (spun) Iron Pipes & fittings (conforming to IS: 1729)

AMC, ALC, Bengal Iron

8 Pig Lead (for caulking of joints) Locally available best quality with minimum 99% purity

9 C.I. Manholes Kirloskar, IVC10 C.I. Double Flanged non-return Kirloskar or equivalent11 PVC Tank Sintex, Patton or equivalent

Water Supply Pipes and Fittings:12 G.I. Pipes TATA, JINDAL, 13 G.I. Fittings R, KS, HB, UI14 Centrifugally Cast Iron Pressure

Pipes (LA class) and Fittings with connection pieces for flanged connection where required.

Electrosteel, Keshoram, IISCO

14 UPVC pipes Oriplast, Supreme15 Gunmetal Valves Leader, Zoloto, Annapurna16 Cast Iron Valves Leader,Venus, Upadhyay,

Sarkar, Ghosh Engineering.17 Strainers Locally available best quality

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material matching with concerned valve

18 PVC Pipes and strainers for Tubewell (Medium casing pipe and matching thickness strainers conforming to IS: 12818)

Oriplast, Supreme

19 MS Top nipple Pipe for Tubewell Locally available best quality material having minimum thickness of 8mm

20 Lift Pump set BE/ Kirloskar PumpsCrompton/Siemens Motors

21 Submersible Pump set KALAMA Pumps & Motor , KSB Pump & Motor

Instruments & Elecricals22 Pressure Gauge & Pressure Switch H. Guru, Danfoss, Fiebig23 Water proof flat Cable Finolex or equivalent24 Electrical accessories to Motor

Control PanelL&T, Havells, Siemens

Sewerage and drainage25 Stoneware pipes and fittings Hind Ceramic, Orind, Perfect,

Burn26 RCC Hume pipes and Collars West Bengal Concrete

Industries , Laxmi, Sood & Sood, Jain & Co or equivalent

27 C.I. Covers D.N.Singha or equivalent28 RCPC Cover/ RGT grating West Bengal Concrete

Industries, Frenco Cement Works Pvt. Ltd.

29 Mirror Akoi, Atul, Silver, Fish, Jolly30 STP Thermax, Ionexchane

ELECTRICALS

1 H.T. Switch-Gear Siemens,CromptonGreaves, BIECCO,AREVA, ABB, Andrewyule

2 Distribution Transformer Crompton, Volt Amp, TRUVOLT, Universal Electric

3 Diesel Engine CUMMINS, GREAVES, TIL, Kirlosker

4 A.C. Alternator KRILOSKER, CROMPTON, STAMFORD

5 ACB, MCCB, SFU, CFS,HRC Fuse Siemens, ABB, L&T, Schneider, C&S

6 Contactor Siemens, ABB, L&T, GE, Schneiderc,BCH

7 Relay ALSTOM, Siemens, L&T, Ashida

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8 MCB DB, MCB, RCCB MDS, Siemens, Hager, ABB, L & T

9 Ammeter, Voltmeter, PF Meter AE,IMP, L&T

10 Ammeter/ Voltmeter selector switch Kaycee, L&T, SWITRON

11 11 KV XLPE (E) Aluminium Cable Fort Gloster, NICCO, Havells, Asian Cables,Polycab

12 1100 Volts grade PVC insulated steel armoured and over all PVC sheathed cable.

Fort Gloster, NICCO, Havells, Asian Cables,Polycab

13 1100 V grade PVC insulated stranded/ flexible copper conductor wire with size in sq.mm. embossed on cable surface.

Finolex, R.R. Kable, L&T, Rajnanigandha, Meseab

14 Rigid PVC Conduit with ISI marked and accessories

PRECISION, BEC,Harse

15 Galvanised Steel Pipe Tata Iron & Steel Co. , Jindal, Bansal

16 Current Transformer Crompton Greaves, L & T , Kappa

TPN switch fuse unit / switch fuse unit with HRC fuses

Siemens, L& T, GE, C&S, Schneider, Cromton Greaves,

10 DP/SPN SFU/ SDFUwith HRC fuse LK, HPL, Havell’s, L&T, Cromton Greaves, Siemens, Gerard, C&S

12 KWH Meter Alstom, HPL-SOCOMEC,L&T, Havell’s.

14 Motor Starter Siemens, L& T, Schneider (CG), GE, T & C.

16 Changeover Switch L & T, ELECON/ Gerard, Havell’s, Clipsal

21 Rigid PVC Conduit B.E.C., Plaza, Kalingha, AKG, Precision, Gerard

22 Black stove enamelled conduit and galvanised steel conduit with ISI marked embosed on conduit surface

B.E.C., NIC, AKG, Supreme

23 Decorative Electrical Switch Board cover with white top Lamination

Hylam or equivalent

24 Metal clad socket & plug having scraping earth arrangement

Hager, Schneider (CG), MDS, L & T, Gerard

25 250 Volt 6 Amp. Piano reed type switch/ Buzzer Push (Flush type), 250 Volt 16 Amp. 3 Pin socket with switch combined

Anchor, CPL, Precision, SSK, Magic.

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26 250 Volt 6 Amp. Ceiling rose, 250 Volt : 16 Amp 3 pin socket with switchcombined

Anchor, CPL, Precision, SSK, Magic

27 Modular type 6 A & 16 A switch. 6 A & : 16 A socket, front plate, mounting box.Regulator/Dimmer

Wraparound of MK, Mosaic of Legrand, Ethena of Crabtree

28 Modular Electronic Regulator/Dimmer

Wraparound of MK, Mosaic of Legrand, Ethena of Crabtree

29 Clock switch/time switch L & T, MDS, Hager, GIC30 ‘CLIP ON’ Terminal assembly Tosha, Elmex31 Measuring Instrument (Ammeter,

Voltmeter, P.F. meter).Automatic Electric, Industrial Meter (I.M.P), Universal Electric, L&T, Rishab, ENERCON

32 ON/OFF Rotary Switch/ Selector Switch/ programme switch

Siemens, Hager, Larsen & Toubro, Kaycee

33 Cable Glands COMIC, Raychem34 Cable Tray Pilco, MEK35 Battery EXIDE, STANDARD36 Fluorescent light fittings (All types) &

lamp. Philips,Thorn, Bajaj

37 Decorative wall bracket/ ceiling mounted Luminaire for PL /incandescent lamp

Philips,Thorn, K-litr, Bajaj, Metal Coats

38 Fluorescent Street Light Luminaire & lamp

Philips,Thorn, K-litr, Bajaj, Metal Coats

Lighting Arrestors with earth station ABB or equivalent39 Halogen spot luminaire & lamp. Philips,Thorn, K-litr, Bajaj, 40 Metal halide luminaure & lamp Philips,Thorn, K-litr, Bajaj, 42 Exhaust Fan G.E.C., Crompton, Polar,

USHA43 Ceiling Fan Crompton, Orient, Polar, USHA44 Busbar Trunking/Rising Main Control & Switchgear (C & S),

Zeta.49 Decorative Street Light Poles Metal Coats or equivalent50 Sodium vapour, Murcury vapour

MHL fittings and lampsPhilips, Crompton, Bajaj

52 CCTV system Godrej or equivalent (work to be executed by authorized vender of godrej or equivalent)

FIRE FIGHTING AND PREVENTION WORKS

1 MS pipes Jindal / BANSAL / TATA

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2 Sluice/NRV Kalpana / H.Sarkar / Venus3 Air Release Valve Sukan / Leader4 Fire Hydrant Valve Newage/Ghosh Engg.5 GM Coupling Ghosh Engg. / ISI Marked6 Pumps Kirloskar / Mather & Platt / KSB7 Fire Extinguisher D.Flame / Minimax/ Cease Fire8 Rubber tube for hose reel Dunlop / Jyoti 9 Paint Asian / J & N / Berger10 Hose Reel Zenith / Ghosh Engg./

Equivalent11 Anti vibration elimentors Dunlop / Kanwal / Resitoflox12 GM Sismese connection Ghosh Engg. / Zenith13 Pressure Switch Indfoss / Switzer14 Pressure guage H.Guru / Feibig15 Wire Finolex / National 16 PVC Conduit BEC / Steelcraft / Precision17 Switch gear L & T / EE / Siemens18 Foot Valve with Strainer H.Sarkar / Venus19 Electric Motors Kirloskar / Crompton / Siemens20 Cables CCI/Universal/Fortgloster21 Cable end termination Dowell / Comet22 Sprinkler Grinell / Best / Tyco23 Manual Call Points & speaker Edward, Notifier, Honeywell,

System Sensor24 Detector Smoke Edward, Notifier, Honeywell,

System Sensor25 Detector Heat Edward, Notifier, Honeywell,

System Sensor26 HOOTER Philips, Minimax, Agni27 Panel for fire alarm system Philips, Agni, Minimax,

Edward, Notifier, Honeywell, System Sensor

28 Zonal Panel Philips, Agni, Minimax29 Fire Door Pacific / Equivalent31 Main panel with ACB’s –

(Febricator)L&T,GE Power Control, Siemens, Madhu Electric

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