AC DUCT FINAL Rajkot ENQUIRY

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WEB SITE : www.tender.gov.in

www.allindiaradio.gov.in TEL : 022-22016685

PRASAR BHARATI (INDIA’s PUBLIC SERVICE BROADCASTER)

O/o THE ADDITIONAL DIRECTOR GENERAL (E) (WZ) ALL INDIA RADIO & DOORDARSHAN

OLD CGO BUILDING, 3RD FLOOR, PRATISHTHA BHAVAN, 101, M. K. ROAD, MUMBAI-400 020.

No. ENGP (300 KW DRM TR Rajkot ) 11 TR /2014 Date: 29.09.2014

TENDER ENQUIRY

Sub.: Supply, Fabrication, Erection & Commissioning of Insulated Supply, Return Air Ducts, Supply

Air Diffusers and Return Air Grills for Water cooled 6X15 Ton package Type A/C Plants at 300KW MW Transmitter Building, All India Radio, HPT Rajkot as per the AIR specifications and enclosed drawing. Dear Sir, This office is interested in purchase of following work as per details given below & attached specifications and invites your quotation.

Sr.No. Description of Work

1.

Supply, Fabrication, Erection & Commissioning of Insulated Supply, Return Air Ducts, Supply Air Diffusers and Return Air Grills for Water cooled 6X15 Ton package Type A/C Plants at 300KW MW Transmitter Building, All India Radio, HPT Rajkot as per the AIR specifications and enclosed drawing no. TM-16412.

CONSIGNEE: Installation Officer, AIR, 300 KW MW TR HPT, AIR Rajkot. The interested agencies/firms may visit the actual site on any working day during office hours with prior intimation and appointment from DDG(E), HPT, AIR Rajkot. * The successful tenderer will be decided on the basis of total cost involved per site. 2. The quotation should specifically mention make, type of the items, delivery date, terms and condition of supply.

The prices given should be firm and as under. (a) The prices quoted shall remain fixed during the entire period of supply/contract and shall not be subject to variation

on any account. (b) The „Unit‟ Price should be for the Unit as indicated in the tender enquiry.

(c) Prices quoted should be for F.O.R. Station of destination in India and Inclusive of charges as packing customs, etc., wherever applicable.

3. In case of Quotation of F.O.R Station of dispatch basis, the purchaser will not pay separately transit insurance and the

supplier will be responsible until the stores arrive in good condition at the destination. Tender/quotation in which transit insurance has been specified as an additional item of expenditure is liable to be ignored.

4. EMD: Earnest Money amounting to Rs. 19400/- for work at AIR HPT Rajkot- in the form of Demand Draft on

Nationalized Bank / Commercial Bank drawn in favour of Prasar Bharati, CE(WZ), AIR & DD, Mumbai should accompany the tender. Tenders without EMD shall be summarily rejected and their bid will not be opened at the time of tender opening and shall be rejected as non responsive at the bid opening stage and returned to the bidder unopened [EMD exemption is applicable for those who are registered with the Central Purchase Organization, National Small Industries Corporation (NSIC) or the Concerned Ministry or Department [ MIB / DG:AIR / DG:DD]. If the Tenderer requires EMD exemption, he should submit the copy of certificate that particular firm is exempted by competent authority otherwise Tender will be rejected.

5. TAXES: a. Payment o f E n t r y T a x / O c t r o i D u t y and Toll T ax (on ultimate products). As the material, which is to be

transported to the consignee, belongs to the Government of India / Prasar Bharati and therefore is exempted from Entry Tax / O ctroi Duty / T oll Tax. However, if the State Governments / Statutory Local Bodies are bound to levy such taxes, the taxes will be paid by supplier / contractor. Supplier / Contractor should indicate such taxes on their prices quoted.

b. Sales Tax / Service Tax leviable and intended to be claimed from the purchaser should be distinctly shown along with

prices quoted. Where this is not done no claim for Sales Tax / Service Tax will be admitted at any later stage and on any ground whatsoever.

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* Please note that this Office will not issue any Form such as ‘C’, ‘D’ etc.

6. Security Deposit : Security Deposit at the rate of 5% to be furnished by successful tenderer. The Security Deposit

shall be furnished in the form of Demand Draft / Bank Guarantee/ FDR from nationalised Bank drawn in favour of the CE(WZ), AIR & DD, Mumbai-20. The Security Deposit will be returned in full on completion of successful Guarantee / Warranty Period.

7. The contractor shall make his own arrangement for storage of all equipments and Materials bought to site from time

to time and their safe custody at site till they are taken over by the indentor/his representative. The contractor shall make his own arrangement for providing accommodation for his workmen at site.

8. The contractor shall make his/her own arrangements for procuring necessary labour, skilled and unskilled. He should

confirm to all local government laws and regulations covering labour and their employment. 9. The contractor and his employees shall comply with the regulation in force for controlled entry into premises where

work is being carried out. 10. Contractor liability for damage caused during installation work and imperfections noticed:

If the contractor or his/her workmen or servants shall break, deface, injure or destroy any part of the building in which they may be working or building road kerb, fence,

enclosure, water pipe, cable, drain, electric or telephone posts or wires, trees, grass or grasslands or any Technical Equipment in the premises on which the work or any part of it as being executed, or if any defect, shrinkage or other faults appear in the work the contractor shall make good at his/her own expense, or in default, the indentor may get the same rectified and deduct the expense from any amount that may be than due or at any time there after may become due to the contractor.

11. The contractor shall take insurance for his men while working at AIR, site, against Any injury, accidents death etc. Similarly the equipment, instruments, tools etc, Belonging to the constrictor shall be insured against damage, loss, theft etc.

12. While engaging labour for carrying out obligations under the contract, the contractor Shall satisfy the conditions laid

down under contract labour (Regulation and Audition

Act 1970 and (Central) Rules 1971 as amended from time to time and Observe all formalities required as per said Act/Rules. The contractor shall also Observe the provision under minimum wages Act 1948 (Central)Rules 1950 amended from time totime while engaging labour.

13. The contractor shall indemnify and hold harmless the purchaser against all claims in respect of injury to any person

howsoever arising out of the work in the course of such installation. The contractor shall discharge his entire obligation under the Indian Workmen Compensation Act in as for as it affects workmen in his Employment.

14. DELIVERY PERIOD : The entire work shall be completed within Two Months from the date of placement of order. 15. TERMS OF PAYMENT: 100% payment will be released on the basis of bill submitted alongwith the certificate from consignee / IO for

satisfactory delivery of entire materials / stores and successful completion of work on each site. 16. The quotation should be sent in a sealed cover addressed to the undersigned, by name, so as to reach on or before

13/10/2014, 2.30 P.M. below mentioned address :

PRASAR BHARATI (BCI), O/O ADDITIONAL DIRECTOR GENERAL (E) [WZ],

ALL INDIA RADIO AND DOORDARSHAN, OLD CGO BUILDING, 3RD FLOOR, PRATISHTHA BHAVAN,

101, M. K. ROAD, MUMBAI-400 020.

THE COVER SHOULD BE SUPERSCRIBED WITH THE FOLLOWING: a. Supply for which quotations are enclosed. b. Reference to letter of enquiry. c. Due date of opening quotation.

17. The Quotations will be opened in this office at 3.00 P.M. on 13/10/2014 in the presence of tenderers or their agents such

as they may choose to attend.

18. QUOTATIONS NOT PROPERLY SUPERSCRIBED WILL NOT BE CONSIDERED.

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19. The quotations submitted shall remain open for acceptance for a period of 60 (Sixty) days from the date of opening of the Tender. If any Tenderer/ Suppliers withdraws his Tender/Quotation before the said period or makes any modifications in the Terms & Conditions on the Tender/Quotation which are not acceptable to the Department, then the Government shall, without prejudice to any other right or remedy, be at the liberty to forfeit 50% of the Earnest Money as aforesaid.

20. Your PAN - Permanent Income Tax Account Number, TIN - Tax Identification Number & Service Tax number as

applicable should be definitely indicated in your quotation. Service tax act/ Rules has been provided exemption to small scale service provider from service tax upto

aggregate value of taxable services provided of 10 Lakh in a financial year as per Ministry of Finance (Department of Revenue) Notification No. 33/2012- Service Tax dated 20-6-2012.

The service providers, who comes under this exemption, need to submit an undertaking to this effect alongwith the tender.

The tenderers having aggregate value of taxable services more than 10 Lakh in a financial year, must clearly mention The service tax on works or/ and sales tax on supply of items as applicable, in the price quoted, otherwise their tender will be rejected.

21. RIGHT OF ACCEPTANCE: The undersigned reserves the right to reject the lowest tender or all the tenders without

assigning any reasons whatsoever. Further, the undersigned reserves him self the right to increase or decrease upto 50% of the quantity of goods and services specified in the schedule of the requirement without any change in the unit price of the order quantities or other term conditions at the time of award of contract. All Quotations/Tenders in which any of the prescribed conditions are not fulfilled or are incomplete in any respect are liable to be rejected. The competent authority on behalf of Prasar Bharati reserve himself the right of accepting the whole or any part of the Tender shall be bound to perform the same at the rate quoted.

22. Canvassing whether directly or indirectly, in connection with Tender/quotation is strictly prohibited and the

Tender/quotation submitted by the Contractors / suppliers who resort to canvassing will be liable to rejection. 23. LANGUAGE / UNITS: All information supplied by the Tenderer & all markings, notes, designation on the drawings &

associated write-ups shall be in “English/Hindi language" only. All dimensions, units on drawings, all references to weights, measures & quantities shall be in MKS.

24. In case this is second enquiry, your Quotation in response to the first enquiry should be presumed to be valid up to

180 days from the last date mentioned in para 11 above unless we hear from you.

25. Eligibility Criteria: The tenderer should give documentary proof for having successfully supplied similar type of material /equipment/stores.

26. FAILURE AND TERMINATION CLAUSE Time and date of delivery shall be essence of the contract. If the Contractor / Supplier

fails to deliver the stores / execute SITC / SETC, or any installment thereof within the period fixed for such delivery in the schedule or at any time repudiates the contract before the expiry of such periods, the purchaser may without prejudice to any other right or remedy, available to him to recover demurrages for breach of the contract:-

(a) Recover from the Supplier/Contractor as agreed, liquidated demurrages including Administrative expenses and not

by way of penalty, a sum equivalent to 0.5% per week up to maximum limit of 10% of the contract value for such delay or part thereof (this is an agreed, genuine pre-estimate of demurrages duly agreed by the parties) which the supplier/contractor has failed to deliver thereof is accepted after expiry of the aforesaid period, provided that the total demurrages so claimed shall not exceed 10% of the contract price of the stores / SITC / SETC. After full period of extension, termination of the contract will be considered by the Organization.

(b) Purchase or authorize the purchase elsewhere on the account and at the risk of the contractor/supplier, of the

stores not so delivered / SITC / SETC not carried out or other of a similar description (where stores exactly complying with the particulars are not in the opinion of the purchaser, which shall be final, readily procurable) by serving prior notice to the contractor/supplier without cancelling the contract in respect of the installment not yet due for delivery or,

(c) Cancel the contract or a portion thereof by serving prior notice to the Contractor/Supplier and if so desired

purchase or authorize the purchase of the stores not so delivered / SITC / SETC not carried out, or

others of a similar description (where stores not delivered / SITC / SETC not carried out, exactly complying

with particulars are not in the opinion of the purchaser, which shall be final readily procurable) at the risk and cost

of the Contractor/Supplier. If the Contractor/Supplier had defaulted in the performance of the original contract, the

purchaser shall have the right to ignore his tender for risk purchase even though the lowest, where the contract is

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terminated at the risk and cost of the firm under the provisions of this clause, it shall be in the discretion of the

purchaser to exercise his discretion to collect or not, the Security deposit from the firm on whom the contract is

placed, at the risk and expense of the defaulted firm.

(d) Where action is taken under sub-clause (b) or sub-clause (c) above, the contractor shall be liable for any

loss which the purchaser may sustain on that account, provided the purchase or if there is an agreement, to purchase, such agreement is made in case of failure to deliver the S tores/Services, within 6 months from the date of such failure and in case of repudiation of contract the Contractor/Supplier shall not be entitled to any gain on such the entire discretion of the purchaser to serve a notice of such purchase on the Contractor/Supplier.

(e) It may further be noted that clause (a) above provides for recovery of liquidated demurrages on the cost of

contract price of delayed supplies (whole unit) at the rate of 0.5% per week up to maximum limit of 10% of the contract value for such delay or part thereof. Liquidated demurrages for delay in supplies thus accrued will be recovered by the paying authority on instruction as specified in the supply order, from the bill for payment of the cost of materials / works submitted by the supplier / contractor in accordance with terms of supply order on instruction from Purchaser regarding liquidated demurrages amount.

(f) Notwithstanding anything stated above, equipment and materials will be deemed to have been delivered / SITC /

SETC will be deemed to have been carried out only when all its components, parts are also delivered. If certain components of stores are not delivered in time / SITC / SETC not carried out in time, the stores / SITC / SETC will be considered as delayed until such time all the missing parts are also delivered.

27. ARBITRATION OF CONTRACTUAL DISPUTES:

If a dispute arises out of or in connection with the contract, or in respect of any defined legal relationship associated therewith or derived there from, the parties agree to submit that dispute to arbitration under ICADR Arbitration Rules, 1996.The Authority to appoint the arbitrator(s) shall be the International Centre for Alternative dispute resolution. The International centre for Alternative Dispute Resolution will provide administrative services in accordance with the ICADR Arbitration Rules, 1996.

a) The number of arbitrator(s) shall be one who has legal as well as Technical Background. b) The place of arbitration proceedings shall be Mumbai only.

28. GENERAL:- All the pages of the tender document should be duly signed, stamped and serially numbered on submission, failing which the tender may not be considered as qualified tender

Web Site: https://tenders.gov.in Web Site: https:// allindiaradio.gov.in

( Vivek Singh )

Dy. Director (Engg.) for ADG (E-WZ)

Tele: 022 -22053528 Copy to, 1. Deputy Director General (E), High Power Transmitter, All India Radio, Rajkot for information please.

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ANNEXURE-I

GENERAL TERMS AND CONDITIONS FOR SUPPLY ORDER 1) NAME OF PURCHASER : Prasar Bharati 2) PAYING AUTHORITY : The ADG(E-WZ), AIR & DD, Mumbai. 3) PAYMENT TERMS 100% payment will be released on the basis of bill submitted alongwith the certificate from consignee / IO for

satisfactory delivery of entire materials / stores and successful completion of work on each site. 4) BILLS :

All the supplies and works shall be in conformity with the order and all the part bills shall be prepared in quadruplicate in the same format as that of the Supply Order. All those part bills shall be submitted to the consignee for necessary certificates and onward transmission to the paying authority.

5) DESPATCH INSTRUCTIONS:

The packing and marking of goods shall be as laid down in clause-12 of general conditions of contract DGS & D69 (revised).

6) The contractor shall arrange to dispatch the goods duly insured direct to the consignee under prior intimation for

delivery at site by whichever mode of transport he may choose, to ensure safe delivery of goods at site. Unloading shall be done at site at the contractor‟s expense. The consignee will provide only storage space. The contractor will provide his own security like locking etc., and store the materials at his own risk.

7) INSPECTION : The material will be inspected at manufacture,s workshop. All necessary tools/ equipments will be arranged by the

manufacturer / tenderer. If required any other tests required to be necessary wil required to be carried out for which arrangement is to be made by the manufacturer / tenderer. In case of disputes third party inspection will be carried out as per BIS standard for which charges will be born by the firm / tenderer. If any damages are found, material will be rejected.

8) INSURANCE:

The contractor shall arrange for the insurance covering the risk during transit, storage etc. Also, the contractor shall take insurance for his men, while working at AIR site, against any injury, accidents, death etc. Similarly, the equipments, instruments, tools etc. belonging to the contractor shall be insured against damage, loss, theft etc. All the charges for such insurance shall be borne by the contractor.

9) ADDITIONAL QUANTITIES:

The purchaser reserves the right to place order for additional quantity up to 100% of the ordered quantity at the same rates and terms and condition during the currency of the contract.

10) PENALTY FOR DELAY

If the contractor is unable to complete the supply, installation, testing and commissioning within the stipulated time limit the purchaser may at his option allow such additional time as may be considered justified with/without penalty and without altering terms and conditions of the order. In the event of failure of the contractor to complete the supply, installation testing and commissioning within the stipulated time or the extended time, the purchaser has the right to impose penalty of 0.5% per week or part thereof the contract price. The Contractor‟s liability for delay, however, shall not exceed 10% of the total contract price.

11) GUARANTEE/ WARRANTY:

The contractor shall accept clause-18 of the Form no. DGS & D-71 with exception that his obligation shall be limited for a period of 12 months from the date of taking over completion of the successful performance excluding down time during which the equipment was not working satisfactorily due to defective parts, faulty material/ design/workmanship or faulty erection. During the guarantee period the contractor shall repair or replace free of charge any parts that will become defective due to faulty material design, workmanship.

12) CONDITIONS OF CONTRACT:

a. DGS & D-68 (Revised) and DGS & D-71 as amended up to date. However, such of these conditions stipulated on this tender shall supercede corresponding conditions in DGS & D-71.

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b. The contractor shall submit the duplicate copy of supply order duly signed and stamped alongwith acceptance letter and Security Deposit within 2 weeks. No supplies will be made and no work shall start unless the acceptance is signed by the contractor.

13) ARBITRATION OF CONTRACTUAL DISPUTES:

If a dispute arises out of or in connection with the contract, or in respect of any defined legal relationship associated therewith or derived there from, the parties agree to submit that dispute to arbitration under ICADR Arbitration Rules, 1996.

The Authority to appoint the arbitrator(s) shall be the International Centre for Alternative dispute resolution. The International Center for Alternative Dispute Resolution will provide administrative services in accordance with the ICADR Arbitration Rules, 1996.

a) The number of arbitrator(s) shall be one who has legal as well as technical background. b) The place of arbitration proceedings shall be Mumbai.

14) FORCE MAJEURE:

a. If any time during the continuance of the contract the performance in while or in part by the contractor shall be prevented or delayed by reason of any war, hostility acts of the public enemy. Civil commotion, sabotage, fires, floods, explosions, epidemics, Quarantine restrictions, strikes, lock-outs or acts of God (therein after restrictions refer to as events and provided notice of happenings of any such eventuality is given by the contractor within 21 days from the date of occurrence thereof, the purchaser shall by reason of such event, neither be entitled to cancel this order not shall have any claim for damages against the contractor in respect of such non-performance or delay in performance and delivery shall be resumed as soon as practicable after such events have come to an end or ceased to exist.

b. Provided further that if the performance in whole or part or any obligation under this order is prevented or delayed by reasons of any such event for a period exceeding 180 days, the purchaser and the contractor shall meet to find a neutral agreement to any effect resulting the reform or the purchaser may at his option cancel order provided also if the order is cancelled under this clause, the purchaser shall be at liberty to take over from the contractor at order prices all unused, un-damaged and acceptable material bought out components and stores in course of manufacture in the possession of the supplier at the time of such cancellation or such portion thereof as the purchaser may deem fit accepting such material, bought out components and stores as the supplier may with the concurrence of the purchaser elect to retain.

15) CANCELLATION:

The purchaser reserves the right to cancel the order in the event of non-performance / delay in execution of the work or unsatisfactory performance by the contractor and recover payment already made if any, along with losses/ damages incurred.

( Vivek Singh )

Dy. Director (Engg.) for ADG (E-WZ)

Tele: 022 -22053528

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TECHNICAL AND OTHER PARTICULALARS TO BE COMPLIED BY THE TENDERERS AGAINST REQUIREMENTS AS GIVEN BELOW

SECTION—I

1. CODES, STANDARDS AND REGULATIONS: All works under this contract shall be complied with the following Indian Standards of latest version.

The contractor shall make available copies (upon Award of Contract) of the above standards for reference of the Owner.

SHEET METAL WORKS :

IS 277 Galvanized Steel sheet

IS 513 Cold rolled low carbon steel sheets.

IS 655 Metal Air ducts

THERMAL INSULATION :

IS 3069 Glossary of terms, symbols & units relating to thermal insulation materials

IS 3346 Method of determination of thermal conductivity of thermal insulation materials

INTERNATIONAL STANDARDS :

SMACNA HVAC Systems – Duct Design

SMACNA HVAC Air duct leakage test manual

SMACNA HVAC duct construction standards – Metal & flexible

SMACNA Rectangular duct construction

SMACNA Round duct construction

2. SPECIFICATION – AIR DISTRIBUTION SYSTEM 2.0 AIR DISTRIBUTION SYSTEM: Tenderer’s

Compliance

Scope: Scope of this section comprises of the supply, installation, testing and

commissioning of Air Distribution System conforming to the specifications and in accordance with the requirement of drawings and of the Schedule of Quantities. This section covers the general requirements for sheet metal ductwork with associated items like air outlets and inlets, fresh air intake, dampers etc.

2.1 SHEET METAL DUCT WORK:

2.1.1 Unless otherwise specified here, the construction, erection, testing and performance of the ducting system shall conform to the SMACNA-1995 standards (“HVAC Duct Construction Standards-Metal and Flexible-Second Edition- 2005” SMACNA).

2.1.2 RECOMMENDED SPECIFICATIONS :

DU

CT

SIZ

E-M

M

GU

AG

E

MM

GU

AG

E-

SW

G

CO

NN

EC

TO

R

TY

PE

TH

ICK

NE

SS

OF

FO

RM

ED

CH

AN

NE

L

-MM

GU

AG

E

RO

D D

IA-

MM

AN

CH

OR

FA

ST

NE

R

0-750 0.63 24 C&S 1.5 16 8 M 8

751-1000 0.08 22 TDF 1.5 16 8 M 8

1001-1300 0.80 22 TDF 2.0 14 10 M 10

1301-1500 0.80 22 Slip On 2.0 14 10 M 10

1501-1800 1.00 20 Slip On 2.4 12 12 M 12

1801-2100 1.00 20 Slip On 2.4 12 12 M 12

2101-2700 1.25 18 Slip On 2.4 12 12 M 12

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2.1.3 Selection of G.I. Gauge and Transverse Connectors: Duct Construction shall be in compliance with 1” (250 Pa) wg Operating Pressure norms as per SMACNA.

2.1.4 The specific class of transverse connector and duct gauge for a given duct dimensions shall be 1”(250 Pa) pressure class. Transverse joint must be able to withstand 1.5 times maximum operating pressure without deformation or failure.

2.1.5 Non-toxic, AC-applications grade P.E. or PVC gasketing shall be provided between all mating flanged joints. Gasket sizes shall conform to flange manufacturer‟s specification.

2.1.6 The fabricated duct dimensions shall be as per approved drawings and all connecting sections shall be dimensionally matched to avoid any gaps.

2.1.7 All fabricated dimensions shall be within ± 1.0 mm of specified dimension. To obtain required perpendicularity, permissible diagonal tolerances shall be ± 1.0 mm per metre.

2.1.8 Transverse Joints : Where a transverse joint acts as a reinforcing member its maximum allowable deflection will be 0.25” (6.25mm) for ducts up to 48” (1220 mm) width (W), and (W/200) for greater widths.

2.1.9 For duct sizes below 750 mm, Slip joints (S or standing S cleats) or alternating Slip and Drive („C‟ cleats) may be used. Under no circumstances should Drive („C‟) cleats be used on all four of the duct sides. All such joints to be spot sealed to avoid visible gaps at the cleat interfaces.

2.1.10 Corners : It shall be inserted into the hollow web of the slip – on flanges. 4 corner pcs. Are required for each rectangular frame, 8 corners pcs, per joint.

2.1.11 Gasket – Neoprene / PVC: Self adhesive, micro-cellular, cross-linked, polyethylene foam/ UV resistant PVC foam/neoprene.

2.1.12 .Bolts, Nuts And Washer: Electro – galvanized, square neck carriage bolts, nuts and washers. Each joint requires 4 sets.

2.1.13 Fabrication Equipment and Processes: All cutting, folding, notching, beading, shearing operations must be done by machines (CAD/CAM equipment preferred) for accuracy of parts and speed of fabrication.

2.2 MATERIAL :

2.2.1 All ducting shall be factory fabricated out of Galvanised Steel Sheet (GSS) Lock Forming Quality (LFQ) conforming to the standards of ASTM A653 and A924 or conform to grade D of IS 1079:1988 or IS 513:1986 as specified in IS277:1992. The coating of zinc shall conform to class VIII.

2.2.2 The G.I. raw material should be used in coil-form (instead of sheets) so as to limit the longitudinal joints at the edges only, irrespective of cross-section dimensions.

2.2.3 Only new, clean and bright sheets without watermarks shall be used.

2.2.4 Flanges and stiffeners used in duct sections shall be rolled steel angles. All nuts, bolts and washers shall be of zinc plated steel and all rivets shall be galvanized or made of aluminium alloy. Gaskets shall be of 3mm-neoprene rubber and shall be leak proof. Four sets for each joints.

2.2.5 CLEATS: GI Metal Clear 150 mm long can be snap-fitted or slid over the mating flanges.

2.2.6 GASKET-NEOPRENE / PVC: UV resistant, self-adhesive, 10 mm wide and 4.5 mm thick.

2.2.7 BOLTS, NUTS AND WASHER: Electro-galvanised, square-necked carriage bolts, nuts and washers. Each joint requires 4 sets.

2.2.8 The ducts will be formed with sheet metal flange and to be cross self ribbed for reinforcement. However where ever the size of the duct either on its width or on its height (breadth) exceeds 750mm the same will have welded angle iron metal flange of size

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2.3.3 All edges to be machine treated using lock formers, flanges and rollers for turning up edges.

2.3.4 Ducts shall be straight and smooth on the inside. Longitudinal seams shall be airtight and at corners only, which shall be either Pittsburgh or Snap Button Punch as per SMACNA practice, to ensure air tightness.

2.3.5 Changes in dimensions and shape of ducts shall be gradual (between 1:4 and 1:7). Turning vanes or air splitters shall be installed in all bends and duct collars designed to permit the air to make the turn without appreciable turbulence.

2.3.6 Plenums shall be shop/factory fabricated panel type and assembled at site. The plenum chamber to be formed with 20 SWG GP/GI sheets. The plenum chamber is a formation of multiple ducts. These ducts are provided with 40X40X6mm thick angle iron welded flanges. The plenum ducts to be connected with 6mm thick thermo rex foam by means of GI MX hexagonal bolt 40X8mm and nut.

The Plenum chamber is to be connected to the respective A/C plants with ducts and these are tailor made according to the opening provided in the plant. Thus formed plant connection supply air ducts with multiple joints as required with control dampers to open or close provisions.

2.3.7 Great care should be taken to ensure that the duct work does not extend outside and beyond height limits as noted on the drawings.

2.3.8 All air turns of 45 degrees or more shall include curved metal blades or vanes arranged so as to permit the air to make turn without an appreciable turbulence. Turning vanes shall be securely fastened to prevent noise or vibration.

2.3.9 The flexible joints are to be between 75 MM and 250 MM between faces.

2.3.10 The duct work should be carried out in a manner and at such time as not to hinder or delay the work of the other agencies especially the boxing or false ceiling Vendors.

2.3.11 The plenum chamber will be erected over the supports made by the tenderer. The supports for the plenum chamber to be made with 150 mm X 100 mm MS RS joist duly fixed by penetrating the two end of the wall and are duly concreted and plastered with sand and cement mortar.

2.3.12 Suitable volume control dampers shall be provided in the branch ducts for balancing air quantities.

2.3.13 Ducts shall be supported independently from the building structure and adequately to keep the ducts true to shape. The ducts are to be hoisted and supported at regular intervals not exceeding 2000mm by drawing 8mm MS threaded rods, fixed to the ceiling hooks. and the ducts are to be rested on support angle formed with 40X40X6mm.

25X25X3mm The angle iron frames as flange to be riveted the surface with MS rivets rigidly. All the ducts are to be joined together with 8mm GI hexagonal bolt and nut at distance not exceeding 250mm.

2.3 CONSTRUCTION AND INSTALLATION :

2.3.1 Duct shall be fabricated as per details shown on approved shop drawings. All ducts shall be rigid and shall be adequately supported and braced where required with standing seams, tees, or angles of sample size to keep the ducts true to shape and to prevent bulking, vibration and breathing.

2.3.2 Fabrication of the ducting including details of transverse joint connections etc shall be as per SMACNA-2005. The ducts should be rigid and should have very minimum leakages. All the supply air and return air ducts which has a size less than 1200mm either on its width or on its height are to be made with 24SWG GP/GI sheets. And ducts with larger size of 1200mm and will have to be formed with 22SWG GI/GP sheets.

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2.3.14 Where ducts cannot be suspended from ceiling, wall brackets or other suitable arrangements as approved by the AIR Officials shall be adopted.

2.3.15 Neoprene or other vibration isolation packing of minimum 6 mm thickness shall be provided between ducts and the angle iron supports / brackets.

2.3.16 Rat proofing consisting of 16 gauge galvanised weld mesh, with about 4 mesh per inch, shall be provided in supply air ducts at AHU / Fan outlets, in return air openings of AHU room wall, and above return air slits in conditioned spaces.

2.3.17 In all branch ducts and at salient locations, suitable splitters and control dampers shall be provided to facilitate air balancing. All dampers shall be provided with suitable links, levers and quadrants with position indicators and locking arrangement.

2.4 MEASUREMENT :

2.4.1 Measurements for the ducting shall be taken at centre line.

2.4.2 Duct measurements (for insulated ducts) shall be taken before application of insulation.

2.4.3 Duct work shall be measured section wise on the basis of external surface area by multiplying the axial length from flange face to flange face for each section by the corresponding duct perimeter in the centre of that section length.

2.4.4 Measurement sheet should cover each fabricated duct piece showing dimensions and external surface area along with summary of external surface area of duct gauge-wise.

2.4.5 Uniformly tapering straight sections shall also be measured as in above.

2.4.6 However, for special pieces like tees, bends etc. area computations for surface areas shall be done as per shape of such pieces.

2.4.7 For each drawing, all supply of ductwork must be accompanied by computer generated detailed bill of material indicating all relevant duct sizes, dimensions and quantities. In addition, summary sheets are also to be provided showing duct areas by gauge and duct size range as applicable.

2.4.8 The quoted unit rate for external surfaces of ducts shall include all wastage allowances, flanges, gaskets for joints, vibration isolators, bracings, hangers and supports, inspection chambers/access panels, splitter dampers with quadrants and levers for position indication, turning vanes, straightening vanes, and all other accessories required to complete the duct installation as per the specifications. These accessories shall not be separately measured.

2.4.9 All duct pieces shall have a part number, corresponding to the serial number assigned to it in the measurement sheet. The above system shall ensure speedy and proper site measurement, verification and approvals.

2.5 LOUVERS:

2.5.1 Fresh Air Intake Louvers shall be provided as indicated in the drawings. The Louvers shall be fabricated out of extruded aluminium sections and shall be powder coated.

2.5.2 Bird / Insects screen will be provided at the outer surface of the louvers. The lowest louver member shall extend out of the bottom frame work, so that rain water can drain off. Wherever specified all fresh air louvers shall be provided with volume control dampers.

2.5.3 These dampers shall be fitted integrally on the inside surface of the louvers. The damper shall be fabricated out of extruded aluminium sections.

2.5.4 Weather proof Louvers shall be made out of extruded aluminium and colour should match with the building finish or as approved by AIR Officials and these shall be of rain protection and metal bird screen to be fitted on the inner surface. The louvers shall have nylon mosquito net and pre filter.

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2.5.5 The louvers shall additionally be provided with heavy duty expanded metal (aluminium-alloy) bird screen and also 20micron filter for fresh air intake.

2.6 GRILLES / DIFFUSERS

2.6.1 Grilles shall be linear type made out of heavy extruded aluminium sections. All the grilles shall be powder coated with approved colour shade.

2.6.2 Diffusers shall be square in shape and made out of heavy extruded aluminium sections with removable core and concealed fixing screw. Opposed blade volume control dampers made out of aluminium extruded sections shall be provided for supply air diffusers.

2.6.3 SIZING: Grilles / Diffusers shall be sized within limits of sound pressure level NC-25 curve .

2.6.3 Supply and return air diffusers shall be shown on the drawings and indicated in schedule of quantities. The supply air diffuser shall be provided with removable key operative volume control dampers. Aluminium supply and return air diffusers shall be powder coated and to have colour of AIR Officials‟ choice or shall be extruded aluminium.

2.6.4 Supply/return air linear diffuser shall be Extruded aluminium construction, square, rectangular, or round diffusers with flush fixed pattern or adjustable flow pattern.

2.6.5 Diffusers for different spaces shall be selected in consultation with AIR Officials.

2.6.6 Supply air diffusers may be equipped with fixed air distribution grids, removable key-operated volume control dampers, and anti smudge rings as per requirements of schedule of quantities.

2.6.7 Linear Supply air / Return Air Grilles: This shall be extruded aluminium construction with fixed horizontal bars at 0 / 15deg inclination and flanged on both side. The thickness of fixed bar louvers shall be at least 5.5mm and angle shall be 20mm/30mm inside. The grilles shall be suitable for concealed fixing volume control damper of extruded. Aluminium construction with black anodized finished shall be provided in SA duct collars.

2.6.8 The colour of powder coating shall be decided by AIR Officials. All supply air grilles / diffusers shall have volume control dampers, factory fitted.

2.6.9 The return air grilles / diffusers shall be similar to the supply air grille/diffusers except that they shall not be having volume control dampers.

2.6.10 Before ordering out of grilles/diffusers, the Vendor shall furnish samples of the same to DDK Officials and upon their approval only the grilles shall be procured.

2.6.11 All ceiling diffusers and side wall grilles should be fixed on to the supply collars of the ducts, with proper GI sheet metal cleats, and not on to the False ceiling / boxing. Suitable removable core diffusers and grilles should be provided to facilitate this.

2.6.12 For ceiling diffusers, the drop collar duct size should be made equal to the diffuser neck size. After fixing the diffusers, the mating portion of the collar and diffuser should be sealed air tight with proper sealant.

2.6.13 When continuous grilles are used, and when the ducts are visible through the grilles, the ducts should be painted with black Matt finish paint.

2.6.14 All supply grilles and diffusers including slot diffusers shall be provided with volume control dampers, turning vanes, deflectors which can be adjusted and set through the grille/diffuser face.

2.6.15 When grilles/diffusers which are not allowed to rest on the false ceiling, the A.C. Vendor shall suspend them from the ceiling slab through adjustable suspension system. Cost of this suspension shall be included in the price of the grilles/diffusers.

2.6.16 All Return/Exhaust grille/diffusers shall be supplied without volume control dampers

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unless otherwise specified or required.

2.6.17 All supply grilles & diffusers shall have box type dampers, having vanes, deflectors which can be adjusted through the grille/diffuser face.

2.6.18 Bars longer than 45cm shall be reinforced by set-back vertical members of approved thickness.

2.6.19 The supply air grills/diffusers are be fitted with (VCD) volume control dampers to control the flow of air, fixed to the collars of the ducts openings. The return air grills are to be formed with aluminium extruded profile with an inclination of 15 degree.

2.7 SPLITTER DAMPERS:

2.7.1 The design, method of handling, and control shall be suitable for the location and service required.

2.7.2 At the junction of branch duct with main duct and split off main duct, Low leakage aluminium volume dampers must be provided whether or not indicated on the drawings, but shall be provided for the proper volume control and balancing the system.

2.7.3 All dampers shall be louver dampers of robust construction and tightly fitted. The design, method of handing and control shall be suitable for the location and service required.

2.7.4 Material Specifications: Factory fabricated Aerofoil-blade Aluminium dampers with compressible jamb seals and extruded-vinyl blade edge seals, in opposed-blade arrangement with steel operating rods rotating in nylon bearings mounted in a single extruded 2 mm thick aluminium frame, and with hard PVC / Nylon gear arrangement for common linkage between blades.

2.7.5 Frames and blades to be constructed from high quality extruded aluminium sections. Frame with flat frontal face to suit flanged connections with the ducts. Frames to be screw fixed and sealed to eliminate casing leaks. Blades to be pivoted on PVC bushes and operated through PVC gear system to be fully enclosed within the damper frame.

2.7.6 The volume dampers shall be of an approved type, lever operated and complete with locking devices, which will permit the dampers to be adjusted and locked in any positions.

2.7.7 The dampers for fresh air inlet shall additionally be provided with stainless steel fly mesh screen, on the outside of 0.8 MM thickness with fine mesh.

2.7.8 After completion of the ductwork, dampers are to be adjusted and set to deliver airflow as specified on the drawings.

2.7.9 Blades shall be pivoted to the frame with Nylon bushes, so as to provide smooth and accurate operation.

2.7.10 In shop drawings it should be clearly marked 300 x 300 access door in suspended ceiling wherever the damper installed, so that at the time of Air balancing, damper location above suspended ceiling should be clearly identify.

2.7.11 All dampers shall be louver dampers of robust construction and tightly fitted. The design, method of handing and control shall be suitable for the location and service required.

2.8 MEASUREMENTS :

2.8.1 Grilles and diffusers (except linear diffusers) shall be measured by the cross sectional areas, perpendicular to the airflow, and excluding the flanges. Volume control dampers, where provided shall not be separately accounted for.

2.8.2 Linear slot type diffusers shall be measured by linear measurements only, and not by cross-sectional areas, and shall exclude flanges for mounting of the linear diffusers. The supply air plenum for linear diffusers shall be measured as described above for ducting.

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SPECIFICATION – INSULATION WORK

3.2.5 INSTALLATION PRE-CHECKS :

All joint should be butted firmly against each other, seal all joint with 75mm reinforced aluminum foil tape. no gluing in joints is required

Insulated each duct separately. Flanges should be insulated with a120mm wide strip of insulation material.

No additional vapor barrier or coatings are required.

All supporting hangers should be lined with the same insulation material to avoid excess compression of insulation .(refer manufacturers instruction )

Ensure no air pocket during the installation of the insulation to the duct.

Any minor surface cuts should be covered with aluminum foil type

All joints should be butted firmly together & sealed with high grade aluminum foil such as PPC 493 or equivalents

3.4 ACOUSTIC INSULATION OF DUCTS(only for supply Duct) :

3.4.1 Material of construction shall be fibre-free elastomeric nitrile rubber foam with open cell structure .

3.0 INSULATION WORK:

Scope: Scope of this section comprises of the supply and fixing of insulation work conforming to the specifications and in accordance with the requirement of drawings and of the Schedule of Quantities.

3.1 GENERAL CONDITIONS :

3.1.1 The Vendor shall ensure that samples of all forms of insulation material to be installed are submitted to AIR Officials for their approval within 10 days from the date of issue of Work Order. AIR shall have the right to reject all subsequent supplies that do not conform to the approved samples.

3.1.2 All insulating materials in the form, which it is used and under the condition anticipated, shall not ignite, burn, support combustion or release toxic gases when subject to fire or heat.

3.1.3 All adhesives used to stick insulation shall also be non-flammable.

3.1.4 Manufactures recommendation for application & safety shall be strictly adhered to.

3.2 THERMAL INSULATION FOR DUCT :

3.2.1 Ducts shall be Thermally insulated with 19 mm thick flexible thermal insulation made out of Cross Linked closed cell polyolefin/ polyethelene foam, factory fused to a reinforced 9 micron aluminium foil and longitudinal and transverse joints sealed with self adhesive tape of same material.

3.2.2 MATERIAL SPECIFICATIONS

Cross linked, closed cell polyolefin foam with factory applied, reinforced aluminum foil.

Optional factory applied acrylic adhesive backing

Density : 25kg / m3

Thermal conductivity: Maximum 0.032W/m.k @ 23°C.

Moisture absorption : non hydroscopic

Water vapor permeability : better than .8gm/m2/24hrs(90%RH, 38° C)

Minimum service temperature : - 80° C

Maximum mean duct service temperature : 90° C

Maximum service temperature : 100° C

3.2.3 The material should confirm to class 0, self extinguishing, does not drip due to reaction with fire, dust, CFC, HCFC and fibre free with zero ODB.

3.2.4 FIRE RATING: Minimum fire rating properties of the insulation material when tested to BS476 part 6&7 - Class 0

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3.4.2 The density of the same shall be within 140-180 Kg/m3.The material should have a thermal conductivity not exceeding 0.05 W/mK. Thickness of the material shall be 25 mm.

3.4.3 The maximum surface temperature the material should withstand is 105º C and minimum temperature should be -20ºC. The Thickness of the material shall be 15mm. The material should conform to Class 1 rating for surface spread of Flame as per BS 476 Part 7.

3.4.4 The insulation board has to be faced with tissue paper and supported by 26 SWG perforated aluminium sheet fixed with GI roofing bolt and nuts of 40X6mm with GI washers and nut. The nut to be on the outer surface of the duct to avoid air cutting noise and the nut are to be applied with red oxide primer for tack and hold. The perforation of Aluminium sheet should not be less than 30 %..

3.4.5 The corrugated surface shall be fixed facing the air path and flat surface stuck to the inside duct surface facing as specified or shown on the drawings.

3.5 ACOUSTIC INSULATION OF PELINUM DUCT :

. The plenum ducts are to be acoustically lined with 50mm thick resin bonded fibre glass wool with a density of 32Kg/Cu.M duly wrapped with fibre glass RP tissue mat and covered duly with 26SWG Al. Perforated sheets, The insulation panels are held in position to the inner peripheries of ducts by means of 75X6mm GI roofing bolt and nuts with GI washers on either side. Due care to be taken while fixing insulation panels by covering the glass wool completely with Al. perforated sheets with necessary over lapping so that glass fibres are not exposed and do not fly while the A/C plant are in operation. Similarly the GI roofing bolt head should be placed adjoining al. Perforated sheet and the nut over the external surface of the duct so as to avoid air cutting noise of the protruding roofing bolts

LIST OF DRAWINGS 4.0 LIST OF DRAWINGS

The following drawings are enclosed as part of the tender. The job involves design as part of the scope. The vendor should be fully capable of undertaking professional design of the system and submit good for construction drawings based on actual site measurements and requirements within 10 days from the date of issue of Work Order to be submitted for approval. AIR will not be in position to furnish any civil / building drawings and the vendor has to make necessary arrangements to re-create drawings based on as built site conditions. The drawings furnished along with tender documents are only for guidance purposes and cannot be construed as good for construction drawings.

4..1 DRAWING NAME CONTENT

4.1.1 TC 16412 Layout Plan of Supply & Return air Duct Drawing of 300 kW

MW Transmitter, AIR, Rajkot.

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DESCRIPTION OF WORK WITH ESTIMATE PRICE

Name of Work : Supply, Fabrication, Erection & Commissioning of Insulated Supply, Return Air Ducts, Supply Air Diffusers and Return Air Grills for Water cooled 6X15 Ton package Type A/C Plants at 300KW MW Transmitter Building, All India Radio, HPT Rajkot as per the AIR specifications and enclosed drawing No. TC-16412.

Supply, Installation and Testing of insulated Supply , Return air ducts , Diffusers and Grills for Water cooled 6X15T

package Type AC Plant at HPT, AIR Rajkot comprising of following items:

Sr. Description Quantity (m²)

Rate Amount

1 Supply air ducts with thermal and acoustic insulations 205 3000 615000

2 Return air ducts with thermal insulations 94 2100 197400

3 25X25X3mm welded angle iron frames for supply air ducts in New Transmitter Room

One Job 40000 40000

4 Supply air grill/Diffuser 850x500 mm with VCD (3 Nos.) 1.275 7500 9562.5

5 Supply air grill/Diffuser 500x350 mm with VCD (5 Nos.) 0.875 5000 4375

6 Supply air grill/Diffuser 1100x600 mm with VCD (1 No.) 0.66 9500 6270

7 Supply air grill/Diffuser 1000x600 mm with VCD (1 No.) 0.6 9000 5400

8 Return air Grill 15deg. Deflections 1000x600 mm (3 Nos.) 1.8 4000 7200

9 Return air Grill 15deg. Deflections 1500x850 mm (2 Nos.) 2.6 6000 15600

10 Return air Grill 15deg. Deflections with sliding shutters 1500x850 mm (2 Nos.)

2.6 8000 20800

11 Louvers for Fresh Air Duct 1100x600 mm 1 No. 3000 3000

12 Splitter Dampers 8 Nos 3000 24000

13 Control Dampers with String operation from floor (3 Nos.) 3 Nos 4000 12000

14 Control Dampers (2 Nos.) 2 Nos 2500 5000

TOTAL 965607.5

ESTIMATE Rupees: Nine Lakh seventy thousand only. 970000

Dimensions are clear inner size of the duct etc. after providing inner lining / insulation. Tenderer has to arrange all necessary hardware like proper size nuts and bolts etc. to complete the above job.

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ANNEXURE-II

Schedule of Requirement

Name of Work : Supply, Fabrication, Erection & Commissioning of Insulated Supply, Return Air Ducts, Supply Air Diffusers and Return Air Grills for Water cooled 6X15 Ton package Type A/C Plants at 300KW MW Transmitter Building, All India Radio, HPT Rajkot as per the AIR specifications and enclosed drawing No. TC-16412.

Supply, Installation and Testing of insulated Supply , Return air ducts , Diffusers and Grills for Water cooled 6X15T

package Type AC Plant at HPT, AIR Rajkot comprising of following items:

Sr. Description Quantity (m²)

Rate Amount

1 Supply air ducts with thermal and acoustic insulations 205

2 Return air ducts with thermal insulations 94

3 25X25X3mm welded angle iron frames for supply air ducts in New Transmitter Room

One Job

4 Supply air grill/Diffuser 850x500 mm with VCD (3 Nos.) 1.275

5 Supply air grill/Diffuser 500x350 mm with VCD (5 Nos.) 0.875

6 Supply air grill/Diffuser 1100x600 mm with VCD (1 No.) 0.66

7 Supply air grill/Diffuser 1000x600 mm with VCD (1 No.) 0.6

8 Return air Grill 15deg. Deflections 1000x600 mm (3 Nos.) 1.8

9 Return air Grill 15deg. Deflections 1500x850 mm (2 Nos.) 2.6

10 Return air Grill 15deg. Deflections with sliding shutters 1500x850 mm (2 Nos.)

2.6

11 Louvers for Fresh Air Duct 1100x600 mm 1 No.

12 Splitter Dampers 8 Nos.

13 Control Dampers with String operation from floor (3 Nos.) 3 Nos.

14 Control Dampers (2 Nos.) 2 Nos.

TOTAL

Excise Duty ( If any )

Sales Tax ( If any )

Octroi Duty / Entry Tax ( If any )

Service Tax

GRAND TOTAL

Rupees:

(Signature) Seal of the Agency

Date :- Place :-

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ANNEXURE-III

Particulars to be filled in by the tenderer

1 Name of the Agency

2 Date of establishment of the agency

3 Detailed office address of the Agency with Office Telephone Number, Fax No. etc,

4 Mobile Number and name of the contract person

5 Whether registered with all concerned Government Authorities (Copies of all certificates of registration to be enclosed.)

6 PF Registration No :

7 ESI Registration No :

8 Labour License ; (Attach photocopy of the Certificate)

9 PAN /TAN Number (copy to be enclosed)

10 Service Tax Registration Number (copy to be enclosed)

11 Whether the firm is blacklisted by any Government Department or any criminal case is registered against the firm or its owner/ partners anywhere in India, (if no, a certificate is to attached in this regard)

12 List of clients and experience in the field.

13 Details of Contracts executed of similar works

14 Whether a copy of the terms and conditions (Annexure – I ), duly signed, in token of acceptance of the same, is attached.

(Signature) Seal of the Agency

Date : Place :

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