Oil Movemnt Tanks.doc

Scope Of Work for Oil Movement Tanks

INDEX

FLOATING / FIXED ROOF AND SPHERE TANKSINSPECTION & REFURBISHMENT

SCOPE OF WORK

I- Part No. –01External and internal inspection and refurbishment of fixed roof tank1.0- Introduction2.0- Reference documents3.0- Detailed scope of work

II- Part No.- 02 External and internal inspection and refurbishment of floating roof tank1.0- Introduction2.0- Reference Documents3.0- Detailed Scope of Work

III- Part No. –03 Sphere tanks External and internal inspection and refurbishment. 1.0- Introduction2.0- Reference Documents3.0- Detailed Scope of Work

IV- Engineering Requirements.1.SPEC. For repairs to the bottoms of tanks2.SPEC. For repairs / replacement of tank roofs3.Calibration of storage tanks.4.Tank cleaning5.Shell opening6.Structural piping7.Erection8.Welding9.Inspection10.Painting

V- Annexes.Annex 01 Reference drawingsAnnex 02 RASCO’s General Narrative SPEC. (GNS).Annex 03 Tanks Specifications Floating Roof. Annex 04 Tanks Specifications Fixed Roof.Annex 05 Tanks Specifications Spheres.Annex 06 List of tanks to be inspected and refurbished Annex 07 List of floating tanks requiring seal system replacement.Annex 08 Lists Of Materials To Be Supplied By The Owner.Annex 09 Specification for Design And Fabrication Of Rubber Seal.Annex 10 Bill of QuantitiesAnnex 11 Preliminary Tank Schedule.Annex 12 Drawings cathodic Protection Test PointsAnnex 13 Drawings for bottom plates replacement typical detailAnnex 14 Drawings for Floating Roof supportsAnnex 15 Drawings for Heating Coils

FLOATING, FIXED ROOF AND SPHERE TANKS

1


GENERAL .

The scope of work consist of the refurbishment of a total number 25 storage tanks composed of

11 Floating roof type 11 Fixed roof type 03 Sphere tanks.

The overall construction schedule shall be limited to 06 years (Refer to the preliminary time schedule in annex 11).The contractor shall take in to consideration and integrate in the subject time schedule the inspection period required for the owner to carry out the inspection activities estimated to 03 weeks after internal disludging , cleaning and grit / sweep blasting.

The owner obligations shall be limited to the following :-1. Supply of utilities (Water, Electricity, service air, steam and gas oil for cleaning.), free

of charge. The contractor should provide the estimated quantities required from the a.m. utilities. The water will be supplied from the nearest point of the available pressure and flow. Contractor will use his own means to increase the pressure and / or to transport to work site if necessary.

2. Supply of tank steel plates of different thicknesses including annular plates, free of charge

3. Maintenance and calibration of existing valves / mixers , dismantling, transportation and re-installation shall be the contractor responsibilities.

4. Supply of required spare parts unless otherwise stated in the scope of work ,free of charge.

5. Closing the supply valves and emptying the tanks from the products to the possible minimum levels, disconnecting the instrumentation and power cables. The contractor shall be responsible for blinding of all inlet / outlet lines.

The contract price shall be based partly on lump sump for activities well defined such as surface preparation, painting, plates replacement, etc…. and unite price for unforeseen and / or undetermined items such as repair works including patching, build-up welding etc…(refer to B.O.Q. annex 10).

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SCOPE OF WORK – PART No. I

EXTERNAL, INTERNAL INSPECTION & REFURBISHMENT OF FIXED ROOF TANKS

1.0 INTRODUCTION .

The objective of this scope of work is to describe the minimum requirements for the activities to be carried out by the contractor under the supervision of RASCO’s inspector in order to be able to evaluate the extent of internal / external damaged parts and issue the related partial / complete repair / replacement method by build-up, patching or painting on one hand. On the other hand, the contractor shall be requested to carry out the described refurbishment work for the apparent items immediately after contract effective date.

2.0 REFERENCES DOCUMENTATIONS .

2.1- Drawings.Refer to Annex 01

2.2- Rasco General Narrative Specifications (GNS). Refer to Annex 02

2.3- Tank Specifications Refer to Annex 03

2.4- Standards

API 650 / API 2550 / API 620 ANSI B-31.3 ASME, Section IX ASME A-233 ASME – 1220, D – 1557 BS – 4027, 882 ASTM – 193 B7 / 194.2 H API – 605 NFPA No. 30 ASME Section IX and Section VIII ASME E-94

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3.0 DETAILED SCOPE OF WORK

3.1- External and internal mechanical / civil works refurbishment of fixed roof tanks.

3.1.1. Annular Outer Ring.

In order to facilitate inspection activities on annular outer ring, arrange to carry out the following: -

- Remove the existing bitumen layer and sand from annular ring around the tank.- Annular ring and lower part of tank shell (Approx. 100 mm) to be cleaned by grit

blasting, followed by RASCO’s inspection to evaluate the extent of damage of annular outer ring and lower part of the tank’s shell and issue inspection note recommending the complete / partial replacement, repair by build-up or patching.

3.1.2- Tank Foundation & Outer Ring-way.

Tank internal foundation & outer ring-way to be repaired as per API -650 STD.

If Rasco’s Inspector decided that the bottom plates and sand need replacement the scope of work shall consist of, but not limited to the following activities:

A- Mechanical Works (Internal).

- Cutting of opening in the shell of tank (necessary for access, soil replacement, plates replacement).

- Removal of the heating coil.- Removal of complete bottom plates by proper grinding the filler welding layer joint.- Cut in pieces the existing tank bottom plates and remove from site to an approved

disposal area (not more than 5km distance).- Prefabrication of new bottom plates (Thickness 8 - 10mm) & Annular plates

(11.1mm) which supplied by Rasco’s.- Painting of bottom of the new plates with coal tar epoxy ameron 78 HBB 400

microns (supplied by the contractor) . As per painting specification Annex – 02.- Laying and erection by welding the new bottom plates on related annular plates as

per as built drawings.- Apply vacuum test on the welding joints of bottom plates. - Renew of the heating coils .- Reinstate the tank to its original condition, ready for operation, re-install electrical

accessories, and related connections (Supply of insulation material for necessary repair on the tank shall be by the Contractor).

- Apply NDT on welding arrangement,- Radiographic testing is the contractor’s responsibility - Filling and hydrostatic test of the tank in accordance with the following:

i. API 650 Last editionii. Owner Specification.

iii. Site Inspection Requirements- De-watering the tank- Bottom plates internal and 1st coarse tank shell to be painted / lined as per approved

system procedure and specification.

B- Civil Work (Internal).4


- Remove of the following backfilling material according to drawing no. PE/C/Std / 01 ISSUE – 0 (Annex 13 ) .

- Remove 100 mm thick contaminated layer from top of the existing pad layer.- Remove if required all contaminated pad layer (Next to 100 mm above) to be

inspected as “hold” item by the engineer.- Install 100 mm firmly compacted new layer mix of natural sand with sulphate

resistant cement type V according to BS 4027.i. The minimum content of cement shall be 10% based on the dry weight of sand

ii. The minimum compressive strength of the sand cement mixture shall be 2.8 N/mm² at 7 days as per DWG. No. PE/C/Std / 01 ISSUE – 0

- This layer shall be thoroughly compacted by rolling with vibration roller up to 95% density as per ASTM D-1557 hold item.

- The final layer under the tank coated base plate (100 mm Thick.) to be replaced with dry washed sand to be inspected by the engineer and considered as a “hold” item.

- The sand used shall be natural grading zone, according to BS 882, chloride free, washed by clean and pure water, grade irregularities caused by movement of equipment and materials during construction to be corrected before bottom plates are placed for welding.

-Supply and installation of new cathodic protection test points according to DRW No. PE/C/SK-10, SD-A-274/1075 ( Annex 12 ) and manufacturer’s brochure if required.

C- Civil Work (External).Tank foundation bearm to be repaired as per repair procedure mentioned in the

engineering requirements ( Specification for repairs to the bottom of tanks item no. 1.2.2) drawing no. PE/C/Std / 01 ISSUE - 0 (Annex 13 ).

3.1.3- Tank Shell .In order to carry out the shell external inspection,

the requirements shall include but not limited to the erection of scaffolding, provision of Manlift, removal and re-installation of existing or new insulation whenever applicable, surface preparation by localized sand blasting or grinding as per inspection request.If repairs required and necessary on the shell, the shell should be patched, build up or replaced partially according to the standards and to be painted.

3.1.4- Wind Girder (Stiffener Ring). In order to carry out the complete wind girder

inspection clean by means of grit blasting from both sides if required.If inspection reveals that repairs are required on wind girder, related repairs should be in accordance with the applicable standard. (Complete / partial replacement, patching, build-up and painting). To facilitate inspection, scaffolding and manlift may be required.

3.1.5- Insulation.5


All damaged insulation including loose or missing screws and cut insulation stripes and loose insulation to be replaced.Insulation at welding joints between shell and wind girder, around the supports of spiral stairway, welded on tank shell, at the shell first course including insulation at selected points around the supports of fire fighting pipes welded on tank shell, to be removed partially or completely in accordance with the inspector’s requirement for inspection purpose and to be re-fixed after eventual repairs and painting if required, to the engineer satisfaction.

3.1.6- Tank Connected Nozzles, Piping, Vents with flame arrestors And Emergency Valves (Doors).

Repair / Replace all the damaged above mentioned items including insulation sheets from the tank connection to the bundwall including screws, straps and sealing with mastic.All rusty valves and nozzle shall be grit blasted, repaired / replaced and painted as per Rasco’s painting procedure and specifications. Accordance to the inspection results

3.1.7- Fire Fighting / Piping System. All pipelines clamps and supports shall be repaired or replaced and painted as per

inspection requirements. All the touching points between the pipe clamp and support shall be protected by sleeve or half sleeve (saddle) on the pipe. Piping system shall be subjected to pressure test to detect any leaks. Replace any damage, foam chamber, firefighting pipe section as per inspection recommendation and repaint all the piping system.

3.1.7- Steam Stations.All steam stations within the tank bund wall area to be replaced as per existing .

All corroded heat tracing pipes, valves and steam traps shall be replaced.

3.1.8- Roof Plates With Manhole Covers .Complete sweep blasting to applied on tank roof in order to

facilitate inspection activities. If repairs are required on the roof plates, complete / partial replacement, patching, buildup and complete painting shall be requested by the inspection with relevant repair procedure.

3.1.9- Steel Structure.A- Spiral Stairway, Vertical Ladders And Platform. Remove all steps and grit blast structures of spiral stairway and repair or replace

any damaged section as per inspection recommendations Replace all bolts, nuts, and washers. Complete weld seal between steps and steel structures to be carried. Repaint all steel structures of spiral stairway as per RASCO’s painting procedure. Repair and repaint all vertical ladders.

B- Tank Roof Hand Rail. Shall be cleaned by grit blasting, remove and clean all old welding joints, re-weld all welding joints followed by complete painting.

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C- Lower Bridge.Dismantle all bridge steps , clean by grit blasting all bridge structure to remove all corrosion scales / corrosion products and repair any damaged part or section.Re-weld all joints followed by complete painting.

3.2- Electrical And Instrumentation Detailed Activities. Repair all earth connections located in the tank, namely earth connections of the

junction boxes, tank, and valves. Replace the corroded bolts, nuts and replace earth cable lugs, if found severely

corroded, bonding surfaces shall be steel brushed to white metal finish and sheared with petroleum jelly. The complete earth connection should be covered with denso tape or approved equivalent material to prevent ingress of moisture.

Megger all earth connections to ground earth resistance which should not be greater than 1 ohm.

Grit blast and repaint motor operated valves (MOV's) as per inspection request and according to RASCO’s painting procedure.

Replace corroded supports of cable trays at tank roof and tank shell including damaged cable tray.

Repair / replace all lighting system including renewal of lamp holders, replacement of all clamps and supports of lighting stand pipe and electrical lighting connections checking.

Repair and carry out touch up paint of pipe level indicator. Install 4 no’s 6" PVC pipes, schedule 80, length 1.25 meters with PVC covers as

per drawing No. PE/SK/8 (Annex 12) after installation, PVC pipes to be filled with clean soil free from rocks.

Thermowell to be cut for cleaning and re-welded. Rubber flexible joints for level transmitter connection to be replaced. To repaint level transmitters, as per RASCO’s inspection request and painting

procedure. Repair and repaint corroded supports for temperature elements. Replace Mechanical level indicators.

3.3- Fixed Roof Tanks Internal Inspection And Refurbishment.

3.3.1- Bottom And Annular Plates.In order to facilitate inspection activities on bottom plates, annular plates and first

course of tank shell, the contractor shall be requested to carry out complete cleaning and sweep blast to the satisfaction of the inspector for the implementation of the following visual inspection and tests:

Vacuum box test on welding joints. Thickness measurements by UT on each plate (minimum 10 points). Magnetic particles and dye penetrante tests on all welding joints. Samples to be cut from tank bottom (minimum 5 pieces from selected locations). Floor scanner by UT, Shall cover 100% of tank bottom (if necessary).

If inspection reveals that repairs are required, complete / partial replacement patching, build up and painting, the works shall be executed to the standards.

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In the event of completed bottom plates replacement refer to Para 3.1.1.2 items A&B described above for the change of old sand and backfilling refer to drawing no. PE/C/STD/01 Issue 0 (Annex 13) .

3.3.2- Steam Heating Coil With Coil Supports.Steam Heating coil to be completely renewed and to be subjected

for NDT Examination as per relevant drawings (Annex 15).

3.3.3- Inner Steel Structure Of Tank Roof Supports & Columns. In view to be able to inspect the steel structure support of tank

inner side, contractor to arrange erection of adequate scaffolding on selected locations marked by inspection. Movable safe scaffolding would be preferable.

3.3.4- Tank Cleaning.Before carrying out the tank internal repairs, the oil shall be reduced

to a required minimum possible level by owner before handling over to the contractor who shall carry out further reduction in level and as per RASCO’s approved procedure and cleaning based on advanced technological method and standards using his own equipments to complete the internal tank cleaning to owner’s satisfaction i.e. safe working conditions, for hot working inside the tank i.e. maintenance works.

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SCOPE OF WORK – PART No. II

EXTERNAL , INTERNAL INSPECTION AND REFURBISHMENT OF FLOATING ROOF TANKS

1- INTRODUCTION.

The objective of this scope of work is to describe the minimum requirements for the activities to be carried out by the contractor under the supervision of RASCO’s inspector in order to be able to evaluate the extent of internal / external damaged parts and issue the related partial / complete repair / replacement method by build-up, patching or painting on one hand. On the other hand, the contractor shall be requested to carry out the described refurbishment work for the apparent items immediately after contract effective date.

2- REFURBISHMENT DOCUMENTS.2.1- Drawings

Refer to annex 012.2- RASCO’s General Narrative Specifications.

Refer to annex 022.3- Tanks Specifications.

Refer to annex 032.4- Standards.

API 650 / API 2550 ANSI B-31.3 and ANSI B-31.4 ASME section IX & VIII ASTM A-233 ASTM D-1220, D-1557 BS 4027, 882

3- DETAILED SCOPE OF WORK.

3.1- External , Internal Inspection And Refurbishment Of Floating Roof Tanks.3.1.1- External.

3.1.1.1- Annular outer Ring.In order to facilitate inspection activities on annular outer ring, the contractor shall carry out the following:

Remove of the existing bitumen and sand from annular ring around the tank. Complete annular ring steel plate and part of tank shell ( approximately 100

mm) to be cleaned by grit blasting after removal of insulation when applicable. After inspection, a report shall be issued by the owner to decide on the method

of repair to be used (Complete / partial replacement, partial repair by build up, patching or painting only).

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3.1.1.2- Tank Foundation & Outer ring-way. Annular ring and lower part of tank shell foundation and outer ring-way to be repaired as per API specification 650 STD, and RASCO’s drawing no. PE/C/std / 01 ISSUE 0 (Annex 13) . In the case of soaking of tank PAD due to hydrocarbon leak, sand and the other materials such as graded granular shall be removed to depth till dry soil free hydrocarbons is reached.

Note: for the other civil activities related to the internal tank bottom plate replacement refer to Part No.1 of scope of work Paragraph 3.1.2, items A & B.

3.1.1.3- Tank Shell. In order to carry out the shell external inspection, the requirements shall include but not limited to the erection of scaffolding, provision of Manlift, removal and re-installation of existing or new insulation whenever applicable, surface preparation by localized sand blasting or grinding as per inspection request.If repairs required, the shell should be patched, build up or replaced partially according to the standards and painted

3.1.1.4 Wind Girder. In order to carry out the complete wind girder

inspection clean by means of grit blasting from both sides if required.If inspection reveals that repairs are required on wind girder, related repairs should be in accordance with the applicable standard. (Complete / partial replacement, patching, buildup and to be painted.

- 3.1.1.5- Insulation.

Replace all damaged insulation, loose screws, cut insulation straps and repair loose insulation.To facilitate external tank inspection, insulation to be removed and reinstalled specifically at the welding joints between shell and walk way, around supports of spiral stairway .Removal of insulation at selected points around the supports of firefighting pipes welded to the tank’s shell and re-insulation.

3.1.1.6- Connected Nozzles And Pipelines.All damaged insulation sheets from the tank connection up to the bund wall shall be

replaced (Insulation sheets, screws, straps and sealing with mastic) all rusty valves, nozzles and piping, shall be grit blasted and inspected and decision to be taken by inspector for eventual / partial / complete replacement.

3.1.1.7- Fire Fighting Piping System.All pipelines clamps and supports shall be repaired or replaced and painted as per

inspection requirements. All the touching points between the pipe clamp and support shall be protected by sleeve or half sleeve (saddle) on the pipe.Piping system shall be subjected to pressure test to detect any leaks.Foam deflectors shall be dismantled out of the tank and dismantled to pieces cleaned by grit blasting and inspected to decide on the repair and /or painting method, damaged foam generators shall be replaced, replace any damaged firefighting pipe section as per inspection recommendation and repaint all the piping system.

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3.1.1.8 -Steam Stations.All steam stations within the tank bund-wall area to be replaced as per existing.

All corroded heat tracing pipes, valves and steam traps shall be replaced

3.1.1.9-Roof Top Plates And Pontoon Plates with Manhole Covers.Roof plates, pontoon and manhole covers shall be cleaned by sweep blasting, if

inspection reveals that repairs are required, partial / complete replacement, patching, build up and complete painting shall be executed according to approved standards. Repair / replace any damaged item or section of pontoon such as vents and manhole covers.

3.1.1.10- Rolling Ladder.Dismantle the rolling ladders out of the tank and dis-assemble into pieces, structures

to be cleaned by grit blast to remove all the corrosion scales and corrosion products, renew all bolts and nuts, reassembly of the rolling ladder pieces, complete seal weld at all welding joints instead of tack welds, erect the rolling ladder after complete re-painting as per RASCO’s painting procedure.

3.1.1.11- Rolling Ladder Runway.Structure shall be cleaned by grit blasting to remove all corrosion scales and

corrosion products, repair or replace any damaged ladder runway part, re-paint all rolling ladder runway structures.

3.1.1.12- Rain Water Sump With Check Valves. Clean water sump from sand, check valve to be inspected, repaired and / or replaced if needed.

3.1.1.13- Steel Structure.A-Spiral Structure With Platform.

- Remove all steps and grit blast structures of spiral stairway and repair or replace any damaged section as per inspection recommendations

- Replace all bolts, nuts, and washers.- Complete weld seal between steps and steel structures to be carried.- Repaint all steel structures of spiral stairway as per RASCO’s painting

procedure.

B- Hand Rail For Walkway And Wind Girder.Shall be cleaned by grit blasting, remove and clean all old welding joints, re-weld all

welding joints followed by complete painting.

C- Lower Bridge.All steps to be dismantled, bridge structures to be cleaned by grit blasting to remove

corrosion scales and corrosion products, repair or replace any damaged part of lower bridge structure, reweld all welding joints and repaint completely.

D- Gauges Platform (Upper Bridge).All steps to be dismantled, structures of gauges platform to be cleaned by grit

blasting to remove corrosion scales and products, repair or replace any damaged part of upper bridge structure, gauge hatch pipe and cover to be repainted, renew cover hinges if required.

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3.1.1.14- Roof Fabric Rubber Sealing System.To be replaced completely including rubber parts continuous

seal as per attached drawings and the metal parts of the sealing ring assembly such as the sealing ring seal clips, pantograph hangers and other accessories to be replaced.

3.1.1.15- Vents And Bleeders.To repair or replace any damaged items of vents and bleeders.

3.1.1.16- Electrical And Instrumentation. Repair all earth connections located in the tank, namely earth connections of the

junction boxes, tank, and valves. Replace the corroded bolts, nuts and replace earth cable lugs, if found severely

damaged, bonding surfaces shall be steel brushed to metal finish and sheared with petroleum jetty. The complete earth connection should be covered with denso tape or approved equivalent material to prevent ingress of moisture.

Megger All earth connections to ground earth resistance and should not be greater than 1 ohm.

Grit blast and repaint motor operated valves as per inspection recommendation and according to RASCO’s painting procedure.

Replace corroded supports of cable trays at tank shell including damaged cable trays.

Repair / replace all lighting system including renewal of lamp holder, replacement of all clamp and supports of lighting connections checking .

Repair and carry out touch up paint of pipe level indicators, level transmitters, corroded supports for temperature elements.

Install 4 nos 6" PVC pipes, schedule 80, length 1.25 meters with PVC covers as per drawing No. PE/SK/8 (Annex 12). After installation, PVC pipes to be filled with clean soil free from rocks as required.

Thermo-well to be cut for cleaning and re-welded.

3.1.2- Internal.

3.1.2.1.- Dislodging And Cleaning.Before carrying out the tank internal repairs, the oil shall be reduced

to a required minimum possible level by owner before handing over to the contractor who shall carry out further reduction in level required for disludging if necessary as per RASCO’s approved procedure and cleaning based on advanced technological method and standards using his own equipments to complete the internal tank cleaning to owner’s satisfaction i.e. safe working conditions, for hot working inside the tank i.e. maintenance works.

3.1.2.2- After complete tank emptying, cleaning and sweep grit blast and final cleaning of tank bottom plates, annular plates and tank shell, the following inspection methods shall be utilized to determine the extent of required partial / complete repair / replacement: -

Visual inspection. Vacuum box test on welding joints. Thickness measurements by UT on each plate (Minimum 10 Points).

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Magnetic particles and Dye penetrates test on all welding joints. Samples to be cut from tank bottom (Minimum 5 pieces from selected locations). Floor scanner by UT, shall cover 100% of tank bottom (if necessary).

If inspection reveals the necessity to carry out partial / complete replacement, patching, build up, tank bottom lining / painting. The work shall be executed as per RASCO’s procedures, refer to tank foundation replacement (Change of old sand and backfilling) according to attached drawing no. PE/C/STD/0 Issue 0 (Annex 13) Para 3.1.2 part No. 01.

3.1.2.3-Drain Pipe With Swing Joints.

Drain pipe to be subjected to hydrostatic specified test pressure by the inspector to detect any leak.Swivel joint; check valve to be checked for repair or replacement as existing.

3.1.2.4- Steam Heating Coil With Coil Supports.Steam heating coil with coil supports to be renewed as per relevant drawing (Annex 15).

3.1.2.5- Floating Roof Legs.All legs to be removed and cleaned using grit blast. Repair or replace the damaged legs marked by Rasco’s inspector as per relevant drawing (Annex 14).

All damaged pipe sleeves shall also be replaced.

3.1.2.6- Mechanical Level Indicator to be replaced.The mechanical level indicator to be replaced completely.

3.1.2.7- Gauge Well & Guide Pole For Level Indicator. Repaint pipe with supports. Rolls to be replaced by new ones . Repair / replace damaged dip hatch.

3.1.2.8- Stand Pipe For Level Transmittal.Paint stand-pipe, repair hinges , replace pins and replace rolls.

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SCOPE OF WORK – PART No. III

SPHERE TANKS EXTERNAL AND INTERNAL INSPECTION AND REFURBISHMENT

1.0- INTRODUCTION . The objective of this scope of work is to describe the minimum requirements for the activities to be carried out by the contractor under the supervision of RASCO’s inspector in order to be able to evaluate the extent of internal / external damaged parts and issue the related partial / complete repair / replacement method by build-up, patching or painting on one hand. On the other hand, the contractor shall be requested to carry out the described refurbishment work for the apparent items immediately after contract effective date.

2.0- REFERENCE DOCUMENTS .

2.1- Drawing.Refer to annex 01

2.2- RASCO’s General Narrative Specifications.Refer to Annex 02

2.3- Sphere Tanks Specifications.Refer to Annex 03

2.4- Standards. API 650 / API 2550 ANSI B-31.1 ASME, section VIII ASTM A – 233 ASTM – D – 1220, D-1557 BS-4027, 882

3.0- DETAILED SCOPE OF WORK. 3.1- External And Internal Inspection And Refurbishment Of Sphere Tanks.3.1.1- External.3.1.1.1- Tank foundation (Fire proofing Columns).

Fire proofing columns and steel structure to be subjected to thorough inspection.Remove all cracked fire proofing cement, check and inspect the columns by inspector to confirm the steel structures are free from any defects, repair all minor damaged cracks in the fire proofing cement, repair or replace damaged parts of columns steel structures.

3.1.1.2- Shell.In order to carry out inspection activities erect scaffolding or

provide manlift, carry out surface preparation by grinding or grit blasting at designated locations by the inspector.

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If inspection reveals that repairs partial / complete replacement are required, patching, build up or painting are to be carried out, inspection shall issue inspection notes according to approved standards, codes and specifications for the repair / replacement procedure.

3.1.1.3- Steel Structures.All steps to be dismantled structures of spiral stairway & top

platform shall be cleaned by grit blasting to remove all corrosion scales and products, repair, or replace any damaged part of spiral stairway and platform structure as per inspection recommendations, renewal of all corroded bolts with nuts, complete weld seal between steps and steel structures at designated locations, repaint all steel structures of spiral stairway as per owner’s painting procedure.

3.1.1.4- Tank Nozzles And Pipes.All connected pipes to be grit blasted , inspected and repaired ( partial /

complete replacement) and painted. All nozzles and valves to be grit blasted, inspected and repaired or replaced and painted.

3.1.1.5- Safety Valves. Remove and re-install all safety valves after painting calibration and testing.

3.1.1.6- Cooling Water And Fire System.Replace all piping clamps around the tank shell, all the contact points

between the pipe, clamp and supports shall be protected by sleeve (saddle) on the pipe, piping system shall be subjected to pressure test to detect any leaks for the inspection. Replace firefighting piping system damaged sections as per inspection recommendations and repaint all piping system.

3.1.1.7- Electrical And Instrumentation.

Repair or replace all electrical earth lugs located around the tanks including earth connections of junction boxes, tank, and valves.

Replace corroded cable trays and supports, corroded bolts, nuts, bonding surfaces shall be steel brushed to white metal finish and sheared with petroleum jetty. The complete earth connection should be covered with denso tape or approved equivalent material to prevent ingress moisture.

Megger all earth connections to ground earth, resistance should not be greater than 1 ohm.

Repair all lighting system, renew lamps holders and replace all clamps and supports of lighting stand pipe, check electrical connections of lighting and replace damaged parts of the system.

3.1.2 Internal.To carry out internal inspection activities, adequate scaffolding shall be

required for the following inspection activities:-

Internal visual inspection Ultrasonic flow detection on all welding joints. MP. & DP. Tests on welding joints. Radiography test on selected welding joints. Shell plate’s scanner by UT, cover 100% of tank (if necessary).

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The following sphere tanks internal parts shall be subject to inspection such as 4" pipe ring for LPG inlet recycle, internal platform, well pipes and supports. Should inspection results reveal repair requirements. (Partial / complete replacement, patching, build up and painting), inspection notes shall be issued for repair / replacement according to codes, standards and specifications.

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ENGINEERING REQUIREMENTS

1.0- SPECIFICATIONS FOR REPAIRS TO THE BOTTOM OF TANKS.

1.1- General. This specification covers repairs / replacement of tank bottom including bottom plates, defective welding and patching repairs.

1.2- Procedures.1.2.1- Repair / replacement of bottom / annular plates.

Prepare a suitable opening in the shell for removing the old plates and installing new plates inside the tank.

- Cut damaged / corroded bottom plates by gas or air ARC gauging.- Make the shell free from annular plates by removing the shell to bottom fillet welding

both from inside and outside.- Carry out internal repairs to tank foundation, if required after removing the bottom

plates according to API 650 STD (refer to scope of work part No. 01 Para 3.1.2 item B). civil works.

1.2.2- Tank Foundation Pad Renewal Shall Consist Of: -

- Removing the exist asphalt layer and minimum 150 mm thick portion of ground annular material of the damaged portion of tank pad as per inspection recommendation.

- Supply new graded granular material duly approved by the engineer, the deeply eroded fill to be replaced and completed with local stones of size 50/70 mm.

-Preparation of formation including compaction of soil at top of the berm and sloping side.- Lay down a thin layer (30mm) of lean concrete on the sloping side (SRC) grade 10

N/MM² - Build up sloping sides with local fair-faced stone 150 to 200 mm size bounded together

with concrete grade 20 N/ MM².- Expansion joint shall be provided every 10,500 mm on side slope berm around the tank

(12mm wide) and to be filled with flex cell bound and approved mastic sealant (polysulphide).

- Build up a solid working wall including 50mm thick lean concrete grade 10 N/ MM² as per referenced drawings.

- Compaction of soil at topside of the berm to minimum 95% dry density.- Casting 100 mm thick new concrete for top berm (S.R. cement type V) grade 25 N/

MM² with 5% slope, reinforced with one layer of wire mesh A 193, up to under side of the annular plate and the concrete surface to be brushed finished. Expansion joints shall be provided every 3500 mm on top berm around the tank (12mm wide) and to be filled with flex cell board and approved mastic sealant (polysulphide).

- The concrete surface under the annular plate shall be well rammed.- Bitumen mix shall be applied to fill the gap between annular plate and top of the new

concrete berm.- To install 4Nos. of 6" PVC pipes for cathodic protection prior to casting the new

concrete slab for the top bearm as per drawing. PE/SK/8 (Annex 12).- Apply new gum-asphalt seal leyco-plast AC layer on the annular outer ring.

17


2.0- SPECIFICATIONS FOR REPAIR / REPLACEMENT OF TANK ROOF.

2.1- GENERAL.This specification covers various technical requirements for partial /

complete repair or replacement for roof of both fixed and flooting roof tanks, nozzles replacement, renewal of roof supports, flexible draining pipes and sealing system for floating roof.

2.2- PROCEDURE. 2.2.1- Fixed Roof Tanks.

- Remove all the appurtenances mounted on the rooftop.- If required the nozzles shall be renewed.- Cut the corroded roof plates as marked by inspector in suitable sizes.- Provide mobile scaffolding inside the tank or any other means to provide suitable access to the inspector to inspect the tank roof structures thoroughly.- Cut and prefabricate the roof plates to required sizes and provide one coat

primer if required- Errect and lay the prefabricated plates in position as per relevant drawings and

carry out roof plate welding in a proper sequence so as to minimize any plates distortion.

- Carry out painting system as per Owner’s procedure.- Fix back all the appurtenances removed.

2.2.2- Floating Roof Tanks.- Remove all the fitting like automatic bleeder vent, if required.- Cut the corroded / damaged plates as marked by the inspector to suitable sizes

for ease of handling either in deck or pontoon section, cutting to be done in small section only.

- Cut out roof nozzles, roof supports or any other fittings in the damaged / corroded section of the plates marked by inspector and renewing of all damaged sections.- Fabricate, erect, and weld as indicated above.- Fix back all fittings removed.- Carry out painting system as per owner’s procedure.

2.2.3- Roof Supports Replacement.- Fabricate new supports as per relevant drawing (Annex 14) for the corroded /

damaged supports marked by inspector- Cut out suitable openings in the deck plates for roof support guides and weld

with reinforcement plate as per relevant drawings.- Fabricate the new locking pins, if required.

2.2.4- Roof Drain Pipe.- Carry out hydrostatic test of drain pipe at a pressure specified in the drawing to

detect the leaks, if any.- Remove the damaged portion of pipe including swivel joint, check valve,

structural, etc. as marked by inspector by cutting or unbolting the flange portion.- Prefabricate the removed portion and weld the same.- Carry out the pressure test.- Carry out painting of the pipe.

18


- In case any swivel joint is found defective, the same shall be sent to workshop for necessary overhaul and to be fixed back after reconditioning or using a new swivel joints.

- Check valve to be removed for testing and repairs and fixing Back the same, or using a new check valve.

2.2.5- Roof Sealing System. The roof sealing system should be changed as per specification for design & fabrication of rubber seal for floating roof tanks, SP – JOB 8460 (Annex 9).

3.0- CALIBRATION OF STORAGE TANKS.

3.1- General.This specification covers the requirements of calibration of petroleum storage

tanks both fixed and floating roof type in the refinery oil movement storage area.

3.2- Work Activities Standards And Codes.-The work of calibration of vertical storage tanks shall be carried out in

accordance with API standards 2250 method for liquid calibration of tanks (ASTM – D- 1220) latest edition or dry calibration method to be further specified and confirmed by owner.

- The tanks for crude oil and other petroleum products, which are intended in operation between companies, the calibration tables shall be considered under the aspect of critical measurement.The calibration tables for other tanks shall be considered under the aspect of “Functional control” (refer to API STD 2550 code section 10 paragraph B).

- The work will be performed after completion of hydrostatic test for the tanks in general unless otherwise specified, the tanks will be geometrically measured, including the following steps:-

Measurement of circumferences and various elevations to API Codes. Determination of bottom volume up to floor reference plate by water filling measured

by flow meter with accuracy not less than 0.5% and a capacity not less than 400 m³/hr. Survey of internal dimensions of perpendicularities and the position of measurement

fixed points. Tank measuring equipment with the standards laid down in API 2550 and ASTM D-

1220.

3.3- Calculations / Documents / Reports.oThe calculations of the capacities in liters shall be made up from zero level (reference

plate) for each CM height to the top edge of the tank at average temperature of product.

oA calibration table will be worked out, in which the volumes corresponding to the progressive height of the tank expressed in CMS and MM interpolates will also be indicated.

oFive Copies of tables and reports along with their transparencies are required.oCalibration report shall cover shell description, deduction for the variation of tank bottom,

correction for measured circumference, capacity of various shell rings, list of volume adding / reduction bodies with calculation and summary of data of tank calibration.

19


4.0- TANK CLEANING.Tank shall be cleaned and gas freed in accordance with approved procedure.

After cleaning the tanks shall be sweep blasted to clean the internal tank bottom and first course of tank shell for inspection purposes, procedure for cleaning of different categories of tanks shell be submitted for owner’s approval, sludge shall be disposed off as per owner’s recommendation.

5.0- SHELL OPENING.Wherever shell openings need stress relieving as per API 650 requirements,

the same shall be completely reassembled into the shell plate and complete unit shall be stressed relieved as per approved procedure duly approved by inspector before welding the same in position.All damaged roof and shell nozzles shall be replaced or fabricated if required.

6.0- STRUCTURALS / PIPING.All corroded / damaged structural shall be removed by cutting, required

portions shall be prefabricated as per relevant drawings for various tanks and to suit the site conditions, as well as per standard ANSI B-31.3 and piping specifications enclosed in annex 02.

7.0- ERECTION.Erection shall be according to section 5 of API 650 and relevant drawings,

specifications of tanks. Procedures for replacement / repairing various tanks sections are to be submitted by contractor for owner’s review and approval.These procedures and compliance with the given requirements not release the contractor from his responsibilities and guarantees.

8.0- WELDING. All welding and related activities shall comply with RASCO.

Specifications٭ and API 620 or 650 Std. respectively. The activities will be executed in accordance with contractors QA/QC program and procedures, which will be presented to RASCO for approval.

8.1- QA/QC program and proceduresThe contractor will prepare Quality Assurance and Quality Control

programs and procedure for the scope of work which will include all relevant activities on welding such as the following:Organization in contractors company on the project

Documentation.Personal (Weld. Engineers, Welders etc)Materials, including additional material for welding (purchasing, handling storage, identification)Calibration of equipment and instrumentations.Inspection and testing.Contractor for each critical work section as for example will prepare welding plans: Tank bottom, Shell, Roof, Steel structure, and Piping. The welding plans will be presented to RASCO for approval prior to commencement of welding.

Welding Procedure Specifications will be prepared and qualified to ASME B.& P.V cod Sect 1X. by contractor prior to commencement

20


of welding. The contractor will submit to RASCO with his WPS/PQR for approval. RASCO might choose for some special procedures to be qualified in presence of his representative.

WeldersQualified welders, in accordance with relevant standards mentioned in

Paragraph 1.0, will carry out the welding. The contractor will have a valid certificate for each welder and track record on his previous performance. However, if not specified before RASCO might require for each qualified welder to be tested before RASCO Inspector prior to commencement of welding.

:.RASCO Spec ٭SP-2000-WP-WS Piping weldingSP-2000- SS Spec. for steel structure

9.0- INSPECTION.Inspector shall have free access to the site radiography and other inspection

and testing shall be carried by the contractor and approved by inspector.

10.0- PAINTING.Painting of various sections of tank shall be carried out in accordance with

RASCO’s General Narrative Specification & painting procedures and shall be carried out after completion of all the activities including testing and inspection.

21


GENERAL PAINTING SPECIFICATION FOR TANKS

Specification for painting : According to Rasco specification. ``SP-2000-PA.

General:This specification covers the general requirements on surface preparation, inspection of

protective coating and various painting systems for different parts of both fixed, and floating roof atmospheric storage tanks. The painting shall be carried out at various levels up to a height of about 20m.

Painting system:

Various sections/parts of the tank as described below shall be coated in chronological order as per different painting system described in the Enclosed table . In case the contractor intends to use equivalent of paints / epoxies specified, the same shall be approved by Rasco’s inspector before application.

.Roof and shell of cone roof tanks A

B- Exterior of shell complete including foam deflectors for floating roof tank and all white products.

C- Floating roof, and internal surface of top shell plates to depth (1m).

D- Shell above wind girder, wind girder top surface, under side of wind girder and supports.

E-Steel structure, spiral stairway, landing, supports, walk ways, walk way supports.

F- Handrails.

G-Fire system completely.

H- Internal coating of (fuel oil, jet fuel, kerosene, and naphtha, gas oil , slopes) tanks bottom, shell up to a height of approx. (2m) From bottom, annular rings, underneath of bottom plates, roof supports legs & roof drain pip.

I- Internal coating (lining) of crude oil tanks (complete bottom 1st course of shell, roof supports legs, roof drain pipes and heating coil supports..etc.) .

J- Pipe in bound wall, safety valves, hand valves, Bodies of control valves (temp <100).

K-Under insulation {pipelines, bodies of control valves} (temp >120).

L-Motor operation valves (MOVs), control valves (actuators), electrical motors, and mixers.

M -Bodies of control valves (temperature>100).

22


TYPICAL PROCEDURE FORTANK EMPTYING AND CLEANING

1. PURPOSE . The objective is to carry out remaining tank's sludge emptying and thorough internal

tank cleaning for inspection purpose by owner's inspector. The intent of this procedure is to stipulate the minimum requirements of the

activities to be performed by the contractor.

2. TANK SPECIFICATIONS

Tank No. ………………. Location Ras Lanuf – Oil Movement Area Height ………………….. Type of roof ………………….. Type of bottom …………………. Height of crown ……………….. Tank Service ………………….. Capacity …………………

3. DETAILED JOB DESCRIBTION

3.1 EMPTYING AND CLEANING.Prior to handing over the tank to the contractor, Rasco operation will carry out the

following activities.3.1.1 Oil level in the tank shall be dropped to the lowest possible level by means of

transferring the product to one the neighboring tanks using available pumps.3.1.2 Temperature of the remaining oil is to be maintained above its pour point if

necessary. 3.1.3 Needed quality of ( circulation) LGO to clean the tank can be transferred from any

one of the neighboring Gas Oil storage tanks to fuel-oil recirculation header (fire emergency) using available pumps. Quantity of gas oil to be transferred will depend on the quantity of F.O. remaining in the tank, it should be able to reduce the pour point of F.O. to near ambient temperature if necessary.

23


3.1.4 The remaining oil in the tank at minimum level to be re-circulated by using a portable pump from one drain point to another point till an adequate mixing is reached if necessary.

3.1.5 Transfer the mixed oil, to slop oil tanks.3.1.6 Transfer the remaining quantity ( through drain point). Transfer can also be done to

a tank truck using a portable pump (from the drain point) for a 2nd transfer to the slop tank through the portable pump connection in the slop oil area by using portable pump. After completion the above activities, the expected sludge deposits require further manual cleaning by the contractor as follows:-

Transfer the remaining quantity ( through drain point). Transfer can also be done to a tank truck using a portable pump (from the drain point) for a 2nd transfer to the slop tank through the portable pump connection in the slop oil area by using portable pump.

Open top and bottom tanks manholes Isolate and blind all tanks inlets & outlets including steam and condensate system

isolation. Provide and install ventilation by connecting air movers at the top manhole of the tank. Issue tanks entry permit by RASCO's safety when the internal of the tank is free from

hydrocarbons gases and tested by safety inspector for personal safe entry with slandered protective equipment, as levels of hydrocarbons and benzene will be very low, and there will be no necessity for heavy breathing apparatus as the level for oxygen will be sufficient (0.2 > 2%, Hydrocarbon < 1000 mg/m³ and Benzene < 3.2mg/ m³)These gas levels are continuously monitored to ensure maximum safety standards for personal* In case Hydrocarbons level is high the use of breathing apparatus is therefore mandatory.

The leaning personnel shall enter inside the tank to remove any left over oil through all drain points by using water and steam hose to the oily waste water sewer.Care should be taken to avoid blocking the oily water lines preventing any introduction of high pour point or rust particles in excess quantity consisting mainly of sludge is estimated to 3000 m³.

Process with the removal of the oil residue through the manhole collected in suitable container using safe equipment duly approved by RASCO's safety officer. The sludge container is to be lifted out of the bund wall and transported for disposal in the designated dumping area by the Engineer approximately 3 to 5 Km from the job site.

After the emptying process remove the remaining product and clean the bottom plates and internal shell as required by RASCO's inspector to acceptable degree using steam lance and water jet, draining the water in the oily water drain when free from heavy suspended particles under RASCO's operation supervisor.

Internal tank to be wiped out of water to dry and make it suitable for inspection and eventual internal maintenance works.

4. ENGINEERING AND SAFETY REQUIREMENTS.

Rubber Hose to be of oil resistant type and suitable size with adequate clamps and fittings to avoid leaks.

Care must be taken to avoid spilling during transferring and emptying operations, therefore no spill of any hydrocarbon inside the bund wall area shall be permitted.

All tools, equipment used for the tank's emptying and cleaning shall be submitted for approval by RASCO's safety officer and used in accordance with the of practice.

24


Throughout the manual cleaning operation, the air mover at the top manhole should be in service to ensure adequate ventilation for the safety of the personnel carrying manual cleaning.

All necessary safety rules must be observed during entire cleaning operation of the tank.

Note: Should the contractor proposes a different cleaning procedure which differs from the above mentioned, contractor to submit the working procedure based on dispersing or fluidizing the sludge using chemicals, mechanical means or other process to be approved by the owner.

25


26


27


28


29


ANNEX – 01

DRAWINGS

30


ANNEX – 02

Rasco’s General Narrative Specifications

31


ANNEX – 03

Floating Roof Tank Specifications

32


ANNEX – 04

Fixed Roof Tank Specifications

33


ANNEX – 05

Sphere Tank Specifications

34


ANNEX – 06

List Of Tanks To Be Inspected And Refurbished

35


ANNEX – 07

List Of Floating Roof Tanks Requiring Seal System Replacement

36


ANNEX – 08

List Of Materials To Be Supplied By The Owner

37


X Supply Of Materials. X.1 Plates:Carbon Steel Plates. Conforming to ASTM STD-A-283 Gr. C

01

X.1.1- 1500mm x 600mm x 4.76mm thick.

E.A.

500

02

X.1.2- 1830mm x 10000mmx 6.35mm thick.

E.A.

450

03

X.1.3- 1830mm x 8000mm x 6.35mm thick.

E.A.

450

04

X.1.4- 1530mm x 6000mm 5mm thick.

E.A.

450

05

X.1.5- 1530mm x 8000mm x 5mm thick.

E.A.

400

06

X.1.6- 1830mm x 10000mm x8mm Thick.

E.A.

300

07

X.1.7- 1830mm x 8000mm x8mm Thick.

E.A.

300

0 X.1.8- 800 mm x E …

38


8 …….mm x 11.1mm Thick. (see Attached eng. Draw.)

.A.

……

ANNEX No. 09Specification for design & Fabrication of

Rubber Seals (SP – JOB 8460 )

39


ANNEX No. 10

40


BILL OF QUANTITIES

BILL OF QUANTITIES

Item No.

DESCRIPTION

UNIT

Estimated Quantities

Unit Rate

Total Price

A Tank disludging, emptying and cleaning. Gas freeing of the following tanks in accordance with API std-typical disludging and cleaning procedures for crude, slops oil and Products tanks for

41


reference.

A-1

Crude Oil tanks (Floating roof type)

A.1.1

- Ǿ 57.8 m, crude oil (CT-01)Sludge to be recovered

M³

3000

A.1.2

Ǿ 57.8 m, crude oil (CT-02) Sludge to be recovered

M³

3000

A.1.3

Ǿ 76.1m, crude oil (CT-03) Sludge to be recovered

M³

3000

A.1.4

Ǿ 76.1m, crude oil (CT-04) Sludge to be recovered

M³

4000

A-2

Slop oil tank (fixed roof type)

A.2.1

Ǿ 28.2m, slop oil (ST-01)

M³

400

A.2.2

- Ǿ 12.7m, slop oil (ST-03)

M³

150

A-3

Fuel Oil Tank (fixed roof type)

M³

3000

A.3.1

Ǿ 63.6 m, Fuel oil tank (Ft-02)

A.3.2

Ǿ 63.6 m, Fuel oil tank (Gt-07)

M³

3000

A.3.


M³

3000

42


3A.3.4

Ǿ 63.6 m, Light gas oil tank (Gt-04)

M³

2000

A.3.5


M³

1500

A.3.6


M³

2000

A.3.7

- Ǿ 63.6 m, Light gas oil tank (Gt-05)

M³

2000

A.3.8

Ǿ 19.1 m, Heavy gas oil tank (Gt-11)

M³

500

A.3.9


M³

500

A-4

Kerosene tank (Floating roof type)

M³ 350

A.4.1

- Ǿ 57.8 m, Kerosene tank (Kt-03)

A.4.2

- Ǿ 57.8 m, Kerosene tank (Kt-04)

M³

350

A.4.3

Ǿ 21.6 m Kerosene tank (Kt-05)

M³

100

A.4.3

- Ǿ 21.6 Kerosene tank (Kt-06)

M³

100

A-5

Naphtha tank (Floating roof type)

A.5

Ǿ 64.6 m, Naphta tank (Nt-01)

M³

250

43


.1A.5.2


M³

250

A.5.3

Ǿ 70.7 m, Naphta tank (Bt-01)

M³

300

B Bottom Plates (Fixed & Flouting roof tanks).

B.1

Complete replacement of bottom plates inclusive of annular plate with underneath painting, drain sump , roof support pads, and cathodic protection.

B.1.1

For Floating Roof Tanks

B.1.1.1

Ǿ 57.8 m, crude oil (CT-01)

M²

2624

B.1.1.2

- Ǿ 57.8 m, crude oil (CT-02)

M²

2624

B.1.1.3

- Ǿ 76.1m, crude oil (CT-03)

M²

4548.4

B.1.1.4

-Ǿ 76.1m, crude oil (CT-04)

M²

4548.4

44


B.1.2


B.1.2.1

Ǿ 57.8 m, Kerosene tank (Kt-03)

M²

2624

B.1.2.2


M²

2624

B.1.2.3


M²

366.4

B.1.2.4

Ǿ 21.6 Kerosene tank (Kt-06)

M²

366.4

B.1.3


B.1.3.1


M²

3276

B.1.3.2


M²

3276

B.1.3.3

Ǿ 70.7m, Naphtha tank (Bt-01)

M²

2624

B Slop oil tank (fixed roof type)

45


.1.4B.1.4.1


M²

624.26

B.1.4.2


M²

126.62

B.1.5


B.1.5.1


M²

3175

B.1.5.2


M²

3175

B.1.5.3


M²

3175

B.1.5.4


M²

3175

B.1.

Gas Oil Tank (fixed roof type

46


6B.1.6.1

Ǿ 34.5 m, Light gas oil tank (Gt- 09)

M²

934.35

B.1.6.2


M²

3175

B.1.6.3


M²

3175

B.1.6.4


M²

286.4

B.1.6.5


M²

286.4

B.2

Complete replacement of bottom plates excluding of annular plate with underneath painting, drain sump , roof support pads, and cathodic protection.

B.2.1

For Flauting Roof Tanks

B.2.1.


M²

2550

47


1B.2.1.2


M²

2550

B.2.1..3

Ǿ 76.1m, crude oil (CT-03)

M²

4451

B.2.1. 4


M²

4451

B.2.2


B.2.2.1


M²

2550

B.2.2.2


M²

2550

B.2.2.3


M²

339

B.2.2.4


M²

339

B.

Naphtha tank (Floating roof

48


2.3

type)

B.2.3.1


M²

339

B.2.3.2


M²

3175

B.2.3.3


M²

3175

B.2.4


B.2.4.1


M²

588

B.2.4.2


M²

111

B.2.5


B.2.5.1


M²

3100

B.2


M²

3100

49


.5.2 B.2.5.3


M²

3100

B.2.6

Gas Oil Tank (fixed roof type)

B.2.6.1


M²

3100

B.2.6.2


M²

891

B.2.6.3


M²

3100

B.2.6.4


M²

3100

B.2.6.5


M²

262

B.2.6.6


M²

262

50


B.3

Partial replacement (up to max. 50%) of bottom plates with underneath painting, drain sump, roof support pads and lifting of tank if necessary.

B.3.1-

Including annular plates (For tanks with roof support columns for fixed roof tanks).

B.3.1.1


M²

1312

B.3.1.2


M²

1312

B.3.1.3


M²

2274.2

B.3.1.4


M²

2274.2

B.3.2-


B.3.2.1


M²

1312

51


B.3.2.2


M²

1312

B.3.2.3


M²

183.2

B.3.2.4


M²

183.2

B.3.3-


B.3.3.1


M²

1638

B.3.3.2


M²

1638

B.3.3.3


M²

1312

B.3.4


B.3.4


M²

312.13

52


.1 B.3.4.2


M²

63.13

B.3.5


B.3.5.1


M²

1587.5

B.3.5.2


M²

1587.5

B.3.5.3


M²

1587.5

B.3.6


B.3.6.1


M²

1587.5

B.3.6.2


M²

467.175

B.3


M²

1587.5

53


.6.3B.3.6.4


M²

1587.5

B.3.6.5


M²

143.2

B.3.6.6


M²

143.2

B.4

Excluding annular plates i.e. sketch plates only (for tanks with roof support columns for fixed roof tanks).

B.4.1


M²

1275

B.4.2


M²

1275

B.4.3


M²

2225.5

B.4.4


M²

2225.5

B.4.5


B.4

Ǿ 57.8 m, Kerosene tank (Kt-03

M²

1275

54


.5.1B.4.5.2


M²

1275

B.4.5.3


M²

169.5

B.4.5.4


M²

169.5

B.4.6


B.4.6.1


M²

169.5

B.4.6.2


M²

1587.5

B.4.6.3


M²

1587.5

B.4.7


B.4


M²

294

55


.7.1B.4.7.2


M²

55.5

B.4.8


B.4.8.1


M²

1550

B.4.8.2


M²

1550

B.4.8.3


M²

1550

B.4.9


B.4.9.1


M²

1550

B.4.9.2


M²

445.5

B.4.9.


M²

1550

56


3B.4.9.4


M²

1550

B.4.9.5


M²

131

B.4.9.6


M²

131

B.5

Removal of defective fillet welding of tank at any location by grinding / gauging, cleaning and re-welding the same.

M²

50m²

B.6

Repairing of the existing damaged or corroded bottom / roof / shell plates by welding first and then covering up the area by welding a patch plate over and above the existing plate including the testing of the welding by vacuum test.

KG

C Foundation Pad

C.1

According to scope of work engineering requirements, tank foundation pad renewal.

C.1.1

- Complete repair of pad and berm

M²

……………

57


…C.1.2-

partial repair of pad and berm(Up to a max. 50%)

M²

……………..

C.2

Tank foundation repairs as per scope of work requirements and API SPEC 650 STD.

……………

C.2.1

Complete repair for internal tank foundation. Remove of the soil around the tank soaked with oil to depth till soil free of oil is reached, transportation to the scrap area and filling back the excavated area with well-compacted sand including supply

M²

C.2.2

Partial repair of tank bottom (up to a Max. 50%).

M²

C.3

Supply and apply bitumen mix between external annular plates and concert bearm. With new gum asphalt seal around the annular ring as Para 1.2.2 (engineering drawings).

D Tank Shell.D.1

Partial / Complete replacement of shell course plates with new plates excluding the nozzle

58


replacement.D.1.1

First and second course from bottom

M.T.

D.1.2

From 3rd to 5th course from bottom.

M.T.

D.1.3

Over and above 5th course from bottom.

M.T.

D.2-

Dismantling side entry mixers from the tanks, transporting to W/shops for overhauling and installation.

E.A.

8

E Fixed Roof.Partial / complete replacement of the damaged roof plates inclusive of all nozzles and attachments falling with in the replacement area, complete with inspection and testing as per API STD 650 for the following:

E.1

- Complete replacement

M²

18730

E.2-

Partial replacement (up to 50%Max.).

M²

152

E.3

Spot replacement of roof plates up to the renewal of 4-5 plates max.

M²

20

F Floating Roof.

F.1

Partial / complete replacement of

59


deck and/or pontoon plates inclusive of nozzles, attachments and existing roof supports legs falling with in the replacement area as per API Std 650 for the following:

F.1.1

Complete replacement of deck or pontoon

M²

3422

F.1.2

Partial replacement of deck or pontoon (50%).

M² .

277.15

F.1.3

Spot replacement of deck or roof plates up to the renewal of 4-5 plates max.

M²

20

F.2

All works pertaining to the complete replacement of roof drain system for the following roof tanks:

F.2.2

Ǿ above 57.8 m tank drain size Ǿ 6"

EA

05

F.2.3

Ǿ34.5 above 34.5 m tank drain size Ǿ 4

EA

06

F.3

hydrostatic test of the roof drain pipe to ascertain its condition and leaks, if any.

EA

11

F.4

Replacement of swivel joint of roof drain pipes with the new ones.

EA

33

F.5

Replacement of neoprene rubbers sheets including the secondary seal, if any with

EA

11

60


the new sheets.

F.7

Remove and clean of the roof supporting legs for the floating roof using grit blast and Repair / replace the damaged parts if necessary, as per relevant drawings including the reinforcement pad on roof and bottom plates.

E.A.

…………..

G Heating Coils

G.1

Supply and Renew of the heating coils, completed with 100% radiography of weld joints and hydrostatic test.

G-1.1

Tank # CT – 01 / 02

L.S.

858 m

G-1.2

Tank # CT – 3 / 4

L.S

1184 m

G-1.3

Tank # ST – 01 L.S

100.36 m

G- 1.4

Tank # ST – 03. L.S

59.479 m

G-1.5-

Tank # FT – 02 L.S

421 m

G-1.6

Tank # GT – 07 / 08

L.S

1263 m

G-

Tank # GT – 11 / 12

L.

195.52

61


1.7

S 4 m

G.2

Supply and Renew of the Finned Tube tanks heaters.

G-2.1

Tank # CT – 01 / 02

E.A.

24

G-2.2

Tank # CT – 3 / 4

E.A.

40

G-2.3

Tank # ST – 01 E.A.

08

G-2.4

Tank # ST – 03. E.A.

5

G-2.5

Tank # FT – 02 E.A.

12

G-2.6

Tank # GT – 07 / 08

E.A.

36

G-2.7

Tank # GT – 11 / 12

E.A.

12

H TANK CALIBRATION.Recalibration of tanks and sphere as per API STD 2550 and 2552

H.1

Floating Roof Tanks.

H.1.1

Ǿ 57.8m height 16.1m (CT-01/02, KT-03/04)

EA

……………

H.

Ǿ 64.6m, height 16.1m (NT-

E …

62


1.2

01/02) A ………….

H.1.3

Ǿ 70.7m, height 16.1m (BT-01)

EA

……………

H.1.4

Ǿ 76.1m, height 18.4m (CT-03 / 04)

EA

…………….

H.1.5

Ǿ 21.6m, height 14m (KT-05 / 06)

EA

H.2

Fixed Roof Tanks

H.2.1

Ǿ 12.7m, height 8m (ST-03).

EA

H.2.2

Ǿ 63.6m, Height 16.1m (FT-02, GT-01/03/04/05/07/08)

EA

H.2.3

Ǿ 34.5m, Height 16.1m (GT-09)

EA

H.2.4

Ǿ 19.1m, Height 14m (GT-11/12)

EA

H.3

LPG SPHERE.

H.3.1

Ǿ 19m (LT-01/02/03).

EA

I PIPING

I.1

Dismantling of existing damaged piping at various elevations and replacing the same with the

63


new piping code ANSI B-31.3

I.1.1

Pipe Dia - Ǿ 1" and below Sch 80

L.M.

250

I.1.2

Pipe Dia - Ǿ 1½" Sch 80

L.M.

250

I.1.3

Pipe Dia - Ǿ 2" Sch 80

L.M.

360

I.1.4


L.M.

400

I.1.5


L.M.

400

I.1.6


L.M.

400

I.1. 7


L.M.

250

J NOZZLES.

J.1

Reconditioning of the damaged nozzles of shell / roof of the tank at various elevations.

J.1.1

Nozzle Dia - Ǿ 2" and below Sch 80

E.A.

4

J.1.2

Nozzle Dia - Ǿ 3” Sch 80 #150

E.A.

4

J.1.3


E.A.

6

J.


E 6J Nozzle Dia - Ǿ E 2

64


.1.5

8” Sch 80 #150 .A.

J.1.6

Nozzle Dia - Ǿ 10"x 12.7mm thick #150

E.A.

6

J.1.7


E.A.

4

J.1.8


E.A.

2

J.1.9


E.A.

2

J.1.10


E.A.

4

J.1.11


E.A.

2

J.1.12


E.A.

2

J.1.13


E.A.

2

J.1.14


E.A.

2

J.1.15

Nozzle Dia - Ǿ 32"x 12.7mm thick #150 Dia

E.A.

2

J.

Nozzle Dia - Ǿ 36"x 12.7mm

E.

2

65


1.16

thick #150 A.

K Insulation Repairs.Removal of the existing insulation including mineral wool Insulation, loose screws, cut insulation straps complete with cladding from the following locations as required by the Engineer, and installing back the insulation using existing / new mineral wool and cladding including fabrication of new cladding if required and supply of fasteners necessary for the insulation work.

K.1

From tank shell of CT- 01/02/03/04 & FT - 02

M²

3000

K.1.

From the piping of any size including the piping, which was replaced during the work execution.

M²

1000

L Tank Hydrostatic Testing. Hydro testing of the tank by filling with water taking from nearest existing tie-ins, includes supply and laying of flexible hoses or

66


temporary piping and pumping facility to pump water if required.

L.1

Volume of hydro test > 50000M³

EA

10

L.2

Volume of hydro From 40 to 50000M³

E.A.

06

L.2

Volume of hydro test water From 15000 to 39000M³

E.A.

01

L.3

Volume of hydro test water < 15000M³

E.A.

10

M Radiography.To carry out the radiography examination of the butt-welding joints of shell plates / pipes using different size (10cm * 40cm & 10cm * 2cm) films type D-7 including the supply of chemicals, Gamma ray source and qualified operator etc. And submitting the developed film for the owner’s interpretation.

E.A.

100 films for Size

10cm * 40cm&

100 films for Size

10cm * 2cm

N Flange Reconditioning Reconditioning of the existing damaged flanges by weld build-up and machining the surfaces if required for the following sizes

67


N.1

Flange Dia- Ǿ 2" and Ǿ 3" # 150

E.A.

08

N.2

Flange Dia - Ǿ 4" and Ǿ 6" # 150

E.A.

08

N.3


E.A.

05

N. 4


E.A.

05

N.5


E.A.

05

P Painting.P.1

Sand Blasting and painting of the following sections of the tanks as per enclosed painting specifications:

P.1.1

External surfaces of the tank LPG sphere.

L.S.

3600

M²

P.1.2

Internal surfaces of top 2 m portion of tank shell of floating roof tanks.

L.S.

7200

M²

P.1.3

Internal surfaces of tank bottom plates and bottom shell course

L.S.

P1.4

External surfaces of fixed and floating roofs including all nozzles

L.S.

52650 M²

P.1.5

All steel structures at various elevations like spiral structure with platform, hand rail, wind girder, lower and upper bridges

L.S.

13450 M²

68


ladders, foam deflectors, rolling ladders, supports etc.

P.2

Sand Blasting and painting of pipes inclusive of all fittings and valves etc. In the following sizes as per the enclosed painting specifications.

P.2.1

Pipe Dia Ǿ ½" to 3"

M²

40

P.2.2-

Pipe Dia Ǿ 4" to 8"

M²

80

P.2.3

Pipe Dia Ǿ 10" and above

M²

30

P.3

Tank internal sweep blasting

M²

P.4

Tank internal grit blasting

M²

P.5

Tank Roof external sweep blasting

M²

P.6

Tank Roof external grit blasting

M²

P.7

Touch-up at any damaged locations of the tank, structural or piping at various elevation located within the bund wall area inclusive of cleaning the surface by grit blasting / Grinding and paint application as per enclosed painting specifications.

M² …

………

P Local surface M

69


.8

preparation using grit blasting / grinding at different elevations of the tank

²…………

Q StructuralDismantling the existing damaged structural like shell ladder, rolling ladder, platform, hand rail, wind girder, foam deflectors, and supports etc.. At any elevation fabrication and erecting of the new structure to replace the existing one.

M.T.

25

R Valve.

Remove of the existing valves of the following sizes from their initial position, blinding the open pipe ends after the valve removal, transportation to the work shop for reconditioning transporting it back to site and reinstallation in position of the

70


reconditioned / new valve.

R.1

valve- Ǿ 1½" * 800 Gate Valve

E.A.

12

R.2

Valve Ǿ 1½" * 800 Globe Valve

E.A.

02

R.3

Valve Ǿ 2" * 800 Gate Valve

E.A.

40

R.4

Valve Ǿ 2" * 800 Globe Valve

E.A.

08

R.5

valve Ǿ 3" * 150 Gate Valve

10

R.6


E.A.

04

R.7

valve Ǿ 3" * 800 Globe Valve

E.A.

02

R.8


80

R.9


E.A.

06

R.10


E.A.

13

R.11


E.A.

02

R.12


E.A.

08

R.13

Valve Ǿ 6" * 300 . Globe Valve

E.A.

04

71


R.14

Valve Ǿ 8" * 150 . Gate Valve

04

R.15

Valve Ǿ 8" * 150 . Globe Valve

E.A.

02

R.16

Valve Ǿ 10" * 150 . Gate Valve

04

R.17

valve Ǿ 10" * 150 . Globe Valve

E.A.

02

R.18

valve Ǿ 4" Check Valve

E.A.

06

R.19

valve Ǿ 6" Check Valve

E.A.

05

R.20

valve Ǿ 1½" * 300 butter fly Valve

E.A.

03

R.21

Valve Ǿ 6" * 300 butter fly Valve

E.A.

03

R.21

valve Ǿ 6" * 300 three way Valve

E.A.

03

S Seal Welding.Seal welding of the existing tack welded structure / plates by fillet weld to avoid corrosion at any locations as instructed by the inspector.

L.M.

3000

U Weld Build-up.

Repairing of

M²

100

72


the pitted / grooved surfaces of shell bottom roof plates and the structural at any elevation by weld build-up after thorough cleaning the surface and flushing the excess weld projection in the metal surface by grinding

V Miscellaneous Works

V.1

Fire fighting piping system including clamp and supports replacement and painting as per inspector’s requirements protection of touching points between the pipe clamp and support by sleeve or half sleeve (saddle) on the pipe.Piping system to be subject to hydro test to detect any leaks.Foam deflectors shall be dismantled cleaned by grit blasting and painted. damaged foam generators to be replaced. damaged firefighting pipe to be replaced and the hole piping system repainting.

E.A.

V Fire proofing

73


.2

columns at L.P.G Tanks

V.2.1

Partial repair of fire proofing cracked areas

M²

V.2.2

Complete repair of fire proofing cracked areas

L.M.

V.3

Gage well and guide pole for level indicator repaint pipe with supports for two meters upper section. Repair dip hatch.

E.A.

36

V.4

Paint stand pipe, repair hinges and replace pin.

E.A.

26

V.4.1

Replace rubber expansion joint for level transmitters

E.A.

14

V.5

Inspection method to be followed to determine the extent of required partial / complete repair / replacement.

V5.1

Vacuum box test on welding joints

E.A.

V.5.2

Thickness measurements by UT on each plate (Mini 10 points).

E.A.

V.5.3

Magnetic particles and dye penetrates test on all welding joints.

E.A.

V.5.4

Samples from tank bottom (Min 5 pcs from selected location).

E.A.

100 sa

mple

74


V.5.5

Floor scanner by U.T., shall cover 100% of tank bottom (if necessary),

M²

………….

V.6

Rainwater sump with check valves clean water sump from sand, check valve to be inspected, repair / replace if required.

E.A.

11

V.7

All tanks vertical ladders, spiral stair way, lower and upper bridge stairs all steps to be dismantled, ladders and bridges structures to be cleaned by grit blasting to remove corrosion scales and products, repair / replace damaged part of structure,

L.S.

70 M.T.

V.8

Automatic Bleeder Vent.To repair or replace any damaged items of vents (rim vent) and bleeders.

E.A.

24

V.9

Replace sliding wheels at floating roof tanks (Rolls).

E.A.

44

V.10

Supply & install of vents with flame arrestors Ø10".

E.A.

23

W Electrical And instrumentation

W. 1

Repair all earth connections located in the tank, namely earth connections of junction boxes, tank and valves.

E.A.

120 each

tank

has 4

poi

75


nts W.2

Replace the corroded bolts, nuts and replace earth cable lugs, if found severely corroded, bounding surfaces shall be steel brushed to metal finish and sheared with petroleum jetty. The complete earth connection should be covered with denso tape or approved equivalent material to prevent ingress of moisture.

E.A.

2000

W.3

Megger all earth connections to ground earth resistance and resistance and should not be greater than 1 Ohm.

E.A.

130

W.4

Replace corroded supports of cable trays at tank roof and shell including damaged cable trays.

E.A.

21

W.5

Repair all lighting system, replacement of all clamp and supports of lighting connections checking.

E.A.

168

W.6

Install 6" Pvc pipes, schedule 80, length 1.25 meters with Pvc covers as per Drw. No. PE/SK/8 after installation Pvc pipes to be filled with clean soil free from stones.

E.A.

100

W.10

Supply and replacement of mechanical level indicator

E.A.

22

76


X Supply Of Materials.

X.1

Structures Carbon Steel Structures. Conforming to ASTM STD A-36 or Equivalent.

X. 1.1

Channel 160 M 50

X. 1.2

Channel 140 M 50

X. 1.3

Channel 120 M 50

X. 1.4

Channel 100 M 50

X. 1. 5

Channel 80 M 50

X. 1. 6

Equal Angle 100 x 100 x 10mm

M 100

X. 1. 7


M 100

X. 1


M 100

77


. 8X. 1. 9


M 100

X. 1. 10


M 100

X. 1. 11


M 100

X. 1. 12


M 100

X. 1. 13


M 100

X. 1. 14


M 100

X. 1. 15


M 100

X. 1

Flat Bar 150 x 6mm

M 100

78


. 16X. 1. 17

Flat Bar 90 x 8mm

M 100

X. 1. 18

Flat Bar 80 x 6mm

M 100

X. 1. 19

Flat Bar 75 x 8mm

M 100

X. 1. 20

Flat Bar 70 x 6mm

M 100

X. 1. 21

Flat Bar 50 x 6mm

M 100

X. 1. 22

round Bar Dia. 40 mm

M 100

X round Bar Dia. M 100X. 1. 24


M 100

X.


M 100

79


1. 25X. 1. 26


M 100

X. 1. 27

round Bar Dia. 6 mm

M 100

X. 1. 28

round Bar Dia. 6 mm

M 100

X.2

Carbon steel cadmium plated U-bolts (material A-36). Suitable for following pipe sizes with nuts:

X.2.1

Dia. 8 inch using 18 mm rods.

3000

X.2.2


3000

X.2.3


3000

X.2.4


3000

X.2.5


3000

80


X.3

Rock Basaltic Wool Insulation Blankets 80 mm thick 100 Kg/m:

X.3.1

Size 2700mm x 600mm

E.A.

X.3

Aluminum Sheets in Roll. Al. Alloy 3105 (AL. MNO.5)

X.3.1

Size 1000mm Wide / 1mm Thick.

L.M.

400

X.4

Self Tapping Screw AISI 316/13mm Lg.

X.4.1

Dia 4.2 Box

200

X.5

Box Strapping AISI 316¾inch with 0.7mm tick.

K.G.

X.6

Grating flooring panels open rectangular pattern forge welded flooring, Type 33/50 constructed with plain load bearing bars at 33mm and twisted bars forge welded, Transversely at 52mm centers, Fitted with welding on binding bars, Material FE 37 UNI 5334 G4 (BS EN 10025 Gr S275 JR) bath Galvanized.

X.6.1

Section 30 x 3mm, Size 800x270mm.

E.A.

X.6.


E.A

81


2 .X.6.3


E.A

X.6.4


X.7

PIPE:Carbon Steel Seamless Pipe Conforming to API 5L Grade (A) Standard with Plain Ends:

X.7.1

Dia. 12 inch. SCH 80

M 50

X.7.2

Dia. 10 inch. SCH 80

M 100

X.7.3

Dia. 8 inch. SCH 40

M 50

X.7.4

Dia. 6 inch. SCH 40

M 100

X.7.5

Dia. 4 inch. SCH 40

M 200

X.7.6

Dia. 3 inch. SCH 40

M 200

X.7.7

Dia. 2 inch. SCH 80

M 300

X.7.8

Dia. 1½ inch. SCH 80

M 700

X.7

Dia. ¾ inch. SCH 80

M 700

82


.9X.7.10

Dia. 1 inch. SCH 80

M 700

X.7.11

Dia. ½ inch. SCH 80

M 700

Dia 2½ inch. SCH 8 API 5L Gr-B C.S.

M 300

X.7.13

Dia 6 inch PVC pipes for C.P test points

M 50

X.8

ELBOWS:Forged Carbon Steel Butt Welded Long Radius Elbows Conforming to ASTM A-234 WPB.

X.8.1

Dia. 4 inch. SCH 40. 90º

E.A.

70

X.8.2


E.A.

50

X.8.3


E.A.

50

X.8.4


E.A.

30

X.8.5

Dia. 2 inch. SCH 40. 90ºº

E.A.

70

X.8.6


E.A.

50

X Dia. 1½ inch. E 30

83


.8.7

SCH 40. 90º .A.

X.8.8

Dia. 1½ inch. SCH 40. 45º

E.A.

50

X.8.9

Dia. 1 inch. SCH 40. 90ºº

E.A.

70

X.8.10


E.A.

50

X.8.11

Dia. ½ inch. SCH 40. 90º

E.A.

50

X.8.12

Dia. ½ inch. SCH 40. 45º

E.A.

50

X.8.13

Dia. ¾ inch. SCH 40. 90º

E.A.

50

X.8.14

Dia. ¾ inch. SCH 40. 45º

E.A.

50

X.9

Reducers:Forged Carbon Steel Butt Welded Eccentric Reducers Conforming to ASTM Standard A-234 WPB Material & Dimensions as per ANSI B16.9 Standard:

X.9.1

Dia. 6 x 4 inch. SCH 40.

E.A.

15

84


X.9.2


E.A.

20

X.9.3

Dia. 2 x 2½ inch. SCH 40.

E.A.

20

X.9.4


E.A.

15

X.10

GASKETS:Compressed Asbestos Oil Resist Non-Graphite Gasket for following Raised face Flange.

X.10.1

Dai. 36 inch. 150 # Rating.

E.A.

10

X.10.2


E.A.

50

X.10.3


E.A.

10

X.10.4


E.A.

100

X.10.5


E.A.

25

X.10.6


E.A.

06

X.1


E.A

30

85


0.7

.

X.10.8


E.A.

10

X.10.9


E.A.

25

X.10.10


E.A.

200

X.10.11


E.A.

60

X.10.12


E.A.

40

X.10.13


E.A.

100

X.10.14


E.A.

20

X.10.15


E.A.

80

X.10

Dai. 1½ inch. 150 # Rating.

E.A.

80

86


.16X.10.17


E.A.

80

X.11

SOCKET WELDFITTING:Forged Carbon Steel Fittings Conformed to AST A-105 Material and Dimension as per ANSI B16.11 Standard:

X.11.1

Half coupling Dia. 1 inch s.w. 3000 # Rating.

E.A.

200

X.11.2

Half coupling Dia. 1 inch s.w. 3000 # Rating.

E.A.

200

X.11.3

Half coupling Dia. ½ inch s.w. 3000 # Rating.

E.A.

200

X.11.4

100 mm length Nipples Dia. 1 inch SCH 40.

E.A.

300

X.11.5

100 mm length Nipples Dia. ½ inch SCH 40.

E.A.

300

X.11.6

100 mm length Nipples Dia. 1½ inch SCH 40.

E.A.

300

X.12

VALVES:Forged Carbon Steel Gate Valve Screwed NPT Conforming to

E.A.

87


API Standard 602 having material conformed to ASTM A-105 and trim material conformed to ANSI 410C (11-13%GR).

X.12.1

- Dia. 2 inch. 800 # Rating. Gat Valve

E.A.

50

X.12.2

- Dia. 2 inch. 150 # Rating Gat Valve

50

X.12.3

- Dia. 2 inch. 800 # Rating. globe Valve

6

X.12.4

- Dia. 2 inch. 150 # Rating glob Valve

6

X.12.5

- Dia. 1 inch. 800 # Rating.

200

X.12.6

- Dia. ¾ inch. 800 150 # Rating.

500

X.12.7

- Dia. ½ inch. 800 150 # Rating.

500

X.12.8

Dia. 1½ inch. 150 # Rating gate valve

15

X.12.

Dia. 1½ inch. 800 # Rating gate valve

50

88


9X.12.10

Dia. 1½ inch. 150 # Rating Glob valve

4

X.12.11

Dia. 3 inch. 150 # Rating gate valve

16

X.12.12

Dia. 3 inch. 150 # Rating Glob valve

02

X.12.13


08

X.12.14


06

X.12.15


02

X.12.16


10

X.12.17


03

X.12.


04

89


18X.12.19


02

X.12.20


04

X.12.21


02

X.12.22


04

X.12.23

Dia. 10 inch. 150 # Rating glob valve

02

X-13

BOLTS:

X.13.1

- Stud Bolts 7/8 x 4 - ¾.

E.A.

2000

X.13.2

- Stud Bolts ¾ x 4 - ½.

E.A.

2000

X.13.3

- Stud Bolts 5/8 x 4.

E.A.

500

X-

SWIVEL JOINTS:Carbon Steel

90


14

Swivel Joints for roof drain system of floating roof tanks style 40. Annexure to be hydraulic tested before dispatch at 4 Kg/cm pressure to ensure leaks:

X.14.1

Dia. 6 inch. 150 # Rating, size as per Annexure “X”

E.A.

15

X.14.2

Dia. 4 inch. 150 # Rating, as per Annexure “X”

E.A.

18

X-15

PAINTING:As per chemical composition and technical data provided in attachment Annexure-II

X.15.1

Primer (2pack blasting –type A/E/F/G/H/J).

Liter

X.15.2

Finishes (MIO pigmented polyurethane high build type A)

Liter

X.15.3

Finishes (Aliphatic polyurethane type F, G, H).

Liter

X.15.4

Finishes (Polyamide high build epoxy – type E, J).

Liter

X.15.5

Finishes (Heat resistant silicon Aluminum type).

Liter

X.1

Primer (Polymide Epoxy Type D).

Lit

91


5.6

er

X.15.7

Primer (Coal Tar Epoxy Type K).

Liter

X.15.8

Finishes (High Build Coal Tar Epoxy Type K).

Liter

X.15.9

Thinner of item X-15.1 (

Liter

X.15.10

Thinner of items X-15.2, X-15.3, X-15.5

Liter

X.15.11

- Thinner of items X-15.4,

Liter

X.15.12-

Cleaner for all items.

Liter

X-16

Sand Grit MaterialSupply the sand grit material ( Copper Slug) size from 0.2 to 2.5).

Ton

X-17

Cathodic Protection System

X.17.1

Cu –Cu sulphate reference electrodes

E.A.

50

92


X.17.2

Electrical connection cables (2 * 16mm).

L.M.

X.17.3

Cable Joints

X.17.4

Test Stations E.A.

26

X-17

Supply rolls of flouting roof tanks.

44

X-18

Supply cable trays as existing ones.

M …………

X-19

Expansion Joint.Supply expansion joint for stand pipe of level transmitter

E.A.

14

93


ANNEX – 11

PRILIMENARY TIME SCHEDULE

94


ANNEX – 12

CATHODIC PROTECTION TEST POINTS

95


ANNEX – 13

BOTTOM PLATES REPLACEMENTTYPICAL DETAIL

96


ANNEX – 14

ROOF SUPOORTS

97


ANNEX – 15

HEATING COILS

98