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VENDOR / CONTRACTOR DOCUMENT REVIEW COVER SHEET

TINRHERT FIELD DEVELOPMENT PROJECT – EPC 1 Inlet Separation and Boosting Facility in Ohanet Petrofac Job No: JI – 2043

Purchase Order No.: / Service Agreement No.:

CT-G-T/007/SH/EPM/EP/G/18

Description:

Pipeline/Piping Construction/Welding -OSBL

Supplier/Contractor:

GCB

Contractor Document Number:

08572-TRHT-GCB-QC-AP-024

Document Description:

QCP – PIPELINE CONSTRUCTION

Total Nos. of Sheets:

15

Equipment / TAG No.

NA

REV :

A

Status

Status Code



1

APPROVED WITHOUT COMMENTS. (SUPPLIER can proceed with the subsequent work)



2

APPROVED WITH MINOR COMMENTS. (SUPPLIER can proceed with the subsequent work if SUPPLIER agrees to the comments; SUPPLIER to revise and resubmit for approval in code ‘1’)



3

NOT ACCEPTABLE. (SUPPLIER shall rework / redesign / re-specify the contents of documents according to PIUL’s comments.)



4

FOR INFORMATION ONLY (PIUL does not foresee need of approval.)



5

Cancelled / Deleted

Code Description

Reviewing Engineer’s Name, Sign and Date Name:

Sign:

Date:

REVISION HISTORY SHEET REV.

DATE

REASON FOR ISSUE

PREP’D

CHK’D

APR’D

09\11\2019

Issued for Approval

B.ICHRAK

MS.BELKHIRI

S.LARBI

08572-TRHT-GCB-QC-AP-027

Page 1 of 20

PROJECT: TINRHERT FIELD DEVELOPMENT PROJECT-EPC1 DOCUMENT:

QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

CONTENTS 1.0

PURPOSE

2.0

SCOPE

3.0

REFERENCES

4.0

DEFINITIONS

5.0

PROCEDURE

6.0

5.1

Survey, Setting out and Benchmark Control

5.2

Right of Way

5.3

Excavation

5.4

Road Crossing

5.5

Stockpiling of Pipes

5.6

Stringing and Hauling

5.7

Cold Bending

5.8

Welding General Requirements

5.9

Fit-Up and Main Line Welding

5.10

Non Destructive Examination

5.11

Welding Repair

5.12

Heat Shrink Sleeve Application

5.13

High Build Poly Urethane Application

5.14

Holiday Test / Lowering and Laying

5.15

Padding and Backfilling

5.16

Tie-In Welding

5.17

Pipeline Clearance Requirements

5.18

Weld Map and Pipe Book

5.19

Pipeline Marker

5.20

Cathodic Protection System

5.21

Final Clean-up

5.22

Cleaning, gauging, hydro static testing and dewatering

5.23

Documentation

5.24

Safety

5.25

Pipeline Facilities

ATTACHMENT

08572-TRHT-GCB-QC-AP-027

Page2

PROJECT: TINRHERT FIELD DEVELOPMENT PROJECT-EPC1 DOCUMENT:

QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

1.0 1.1

PURPOSE The purpose of this procedure is to provide the requirements of pipeline construction systems associated with the Tinrhert Fields Development Project – EPC 1, Inlet Separation, and Boosting Facility in Ohanet.

2.0

SCOPE

2.1

This procedure applies specifically and only for the execution of project “Pipeline construction systems associated with the Tinrhert Fields Development Project – EPC 1, Inlet Separation, and Boosting Facility in Ohanet”.

3.0

REFERENCES International Codes And Standards ASME B31.8

Gas Transmission and Distribution Piping Systems.

ASME B16.5

Steel Pipe Flanges and Flanged Fittings, Including Ratings for Class

ASME B16.9

Factory-Made Wrought Buttwelding Fittings

ASME B16.34

Steel Valves, Flanged and Butt Welding End

ASTM D 1267

Standard Test Method for Gauge Vapour Pressure of LPG (LP-Gas Method)

ASTN TC 1A

Standard Topical Outlines for Qualification of Nondestructive Testing Personnel

BS PD 8010-1

Code of practice for pipelines. Steel pipelines on land

API 6D

Specification for Pipeline Valves

API 5L

Specification for Line Pipe

API RP 1102

Steel Pipeline Crossings Railroads and Highways

API Std 1104

Standard for Welding Pipelines and Related Facilities

ISO 9001

Quality Management Systems – Requirements

NACE RP0274

Standard Recommended Practise High Voltage Electrical Inspection of Pipeline Coatings

08572-TRHT-GCB-QC-AP-027

Page3

PROJECT: TINRHERT FIELD DEVELOPMENT PROJECT-EPC1 DOCUMENT:

QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

Project Documents 08572-TRHT-TB-PL-18-OO-201

Pipeline Design Basis

08572-TRHT-SP-PL-18-OO-201

Specification for Seamless Carbon Steel Line pipe

08572-TRHT-SP-PL-18-OO-202

Specification for Pipeline valves

08572-TRHT-TB-PL-18-OO-202

Pipeline Stress Analysis Basis

08572-TRHT-CE-PL-18-OO-201

Pipeline Wall Thickness Calculation Report

08572-TRHT-CE-PL-18-OO-202

Pipeline Mechanical Calculations Report

08572-TRHT-SP-PL-18-OO-203

Specification for Barred tees

08572-TRHT-SP-PL-18-OO-204

Specification for Isolating Joints

08572-TRHT-SP-MS-18-VM-204

Mechanical Specification for Pig Launcher / Receiver

08572-TRHT-SP-MT-00-OO-204

Pipeline Coating Specification

08572-TRHT-SP-MT-00-OO-203

Painting and Coating Specification

08572-TRHT-AQ-QC-00-OO-212

Pipeline Welding Specification

08572-TRHT-SP-MT-00-OO-207

Corrosion Monitoring and Control Plan

08572-TRHT-RT-MT-00-OO-201

Material Selection Report - ISBL

08572-TRHT-RT-MT-00-OO-202

Material Selection Report - OSBL

08572-TRHT-SP-PL-18-OO-224

Specification for Pipeline Hydrotesting

08572-TRHT-SP-MT-89-EU-201

Cathodic Protection System Specification for Pipeline

08572-TRHT-TP-PL-18-OO-201

Pipeline Pigging Philosophy

08572-TRHT-DD-PL-18-OO-201

Pipeline Typical Drawings – Right of Way (Row) for Single Pipeline

08572-TRHT-DD-PL-18-OO-202

Pipeline Typical Drawings – Right of Way (Row) for Multiple Pipelines

08572-TRHT-DD-PL-18-OO-203

Pipeline Typical Drawings – For Existing Overhead Powerline Crossing

08572-TRHT-DD-PL-18-OO-204

Pipeline Typical Drawing – For Existing

08572-TRHT-GCB-QC-AP-027

Page4

PROJECT: TINRHERT FIELD DEVELOPMENT PROJECT-EPC1 DOCUMENT:

QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

Cable Crossing 08572-TRHT-DD-PL-18-OO-205

Pipeline Typical Drawings – Trench Details for Single Pipeline

08572-TRHT-DD-PL-18-OO-206

Pipeline Typical Drawings – Trench Details for Multiple Pipelines

08572-TRHT-DD-PL-18-OO-207

Pipeline Typical Drawing – For Concrete Slab

08572-TRHT-DD-PL-18-OO-208

Pipeline Typical Drawings – For Pipeline Markers

08572-TRHT-DD-PL-18-OO-209

Pipeline Typical Drawings – Road Crossing for Underground Pipeline

08572-TRHT-DD-PL-18-OO-210

Pipeline Typical Drawings - For Existing Underground Pipeline Crossing

08572-TRHT-DD-PL-18-OO-211

Pipeline Typical Drawings – For Wadi Crossing

08572-TRHT-DD-PL-18-OO-212

Pipeline Typical Drawings – For Mechanical Protection & Backfill Retaining Bags

08572-T RHT-DO-PL-18-OO-201

Pipeline Schematic Diagram

08572-TRHT-DD-PL-18-OO-231

Pipeline Route Map - Overall

08572-TRHT-RT-PL-18-OO-231 to 08572-TRHT-RT-PL-18-OO-275

Stress Analysis Reports for Flowlines and Trunklines

08572-TRHT-DG-PL-18-OO-201 to 08572-TRHT-DG-PL-18-OO-998

Pipeline Alignment Sheets for Flowlines and Trunklines

08572-TRHT-DK-PL-18-OO-201 to 08572-TRHT-DK-PL-18-OO-213

Pipeline Alignment Sheets Key Plan for Flowlines and Trunklines

08572-TRHT-GCB-QC-AP-027

Page5

PROJECT: TINRHERT FIELD DEVELOPMENT PROJECT-EPC1 DOCUMENT:

QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

4.0 4.1

DEFINITIONS Company

-

Sonatrach

4.2

PMT

-

Petrofac International Ltd. (PIUL)

4.3

contractor

-

GCB

4.4

Project

-

Tinrhert Field Development Project – EPC 1

4.5

Abbreviations

4.5.1 4.5.2 4.5.3 4.5.4 4.5.5 4.5.6 4.5.7 4.5.8

QA/QC U/G QAP IFC PPE ITP HSE ROW

5.0

PROCEDURE

5.1

Survey, Setting out and Benchmark Control

5.1.1

Project specific procedure doc.no. 08572-TRHT-EGCB-QC-AP-011 shall be used for survey, setting out and bench mark control.

5.2

Right of way

5.2.1

The ROW shall be constructed as per 08572-TRHT-EGCB-QC-AP-012 shall be maintained during entire activities of pipeline.

5.2.2

No excavation for pipeline shall be permitted before approval of right of way.

5.3

Excavation

5.3.1 5.3.1.1

Manual Excavation Slit trenches shall be done by hand excavation in all areas where interference with underground utilities are detected as indicated in construction drawings. Approval of Company shall be taken and permit shall be obtained prior to any manual excavation. All existing services shall be recorded in the attachment no.1.

5.3.2 5.3.2.1

Mechanical Excavation Pipeline center line shall be staked and flag the limits of the working area. Excavation by using machine shall be carried out only if slit trenching is completed especially on the areas wherein underground utilities are present, the side of trench excavation to a required depth shall be sloped in accordance with project specification and or shown in the Standard Project drawings. Approval of Company shall be taken and permit shall be obtained prior to any mechanical excavation.

5.3.2.2

Excavators of suitable capacity certified by third party shall be used.

08572-TRHT-GCB-QC-AP-027

Page6

-

Quality Control / Quality Assurance Under Ground Quality assurance procedure Issued for Construction Personal Protective Equipments Inspection and Test Plan Health, Safety & Environment Right Of Way

PROJECT: TINRHERT FIELD DEVELOPMENT PROJECT-EPC1 DOCUMENT:

QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

5.3.2.3

The excavation for concrete work shall be carried out with sufficient margin (working space) to be used as access for shuttering works, finishing touches and damp proofing as required.

5.3.2.4

Where excavation is limited to sloping, applicable shoring shall be installed, monitored by the contractor and company in accordance with the project specification and drawing.

5.3.2.5

The minimum width of the trench as measured at the horizontal centre line of the pipe when in place in the trench shall be 0.4 m greater than the outside diameter of the pipe.

5.3.2.6

Where excavation encounters unsuitable materials including hard object, large root in the sub-grade or existing underground utilities, it shall be excavated to depth and width in a manner specified by the Company in the areas required to be executed. Temporary supports for underground utilities shall be installed and if excavation will continue deeper, excavation will be done manually.

5.3.2.7

Suitable equipment and method shall be used to keep the trench to the line established regardless the type of soil and rock encountered and regardless of the depth of excavation necessary.

5.3.2.8

The bottom of all excavations shall be graded true to level, inspected and approved by the Company prior to fill of sand bedding.

5.3.2.9

The minimum depth of cover shall be as shown in drawing, where not shown, 1.0m depth of cover shall be from ground level and not from top of earth berm.

5.3.2.10

All excavated areas and open holes shall be barricaded before leaving the excavation site. The excavation work close to the traffic or along the road that requires cautioned to the motorist shall be barricaded with cones, lights where required, traffic barriers, and shall be approved by the Company. Precautions shall be taken at the expose pipe/berm areas to ensure that no erosion of the soft sand fill takes place during trenching operations.

5.3.2.11

When loader or other machine is utilized in excavation work, flagman will be assigned to ensure that machine will not come close to the trench. The flagman will assist the machine in crossing the road, install traffic sign and make sure that the motorist will be cautioned.

5.3.2.12

Dewatering of excavations at location of high water level shall be maintained and works shall be as per project specific procedure 08572-TRHT-EGCB-QCAP-011

5.4 5.4.1

Road crossing (Open Cut Method) Excavation by hand on slit trenches at both sides of the road to necessary depth to expose existing underground utilities.

5.4.2

Construct the detour road either on left side or right side portion whenever it is free at 7.0 m width overlay with 150mm thick gatch at well compacted grade. The diversion road shall be in accordance with approved project drawings. The contractor shall inform Company of the starting point and end point.

5.4.3

Once the detour road is ready, close the road affected by the excavation work by installing a traffic signboards, barricades, drums, electrically operated lights or lanterns and assign a flagman on both end of traffic affected area. The contractor shall place danger signs visible during dry light and red lanterns of flame visible during night 100 m from excavated road crossing in both direction

08572-TRHT-GCB-QC-AP-027

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PROJECT: TINRHERT FIELD DEVELOPMENT PROJECT-EPC1 DOCUMENT:

QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

of traffic. Danger signs are to be in English and French and must be recognisable at 100 m 5.4.4

Prior to commencement of the excavation, the centerline of the pipeline and the limit of road excavation will be marked up on the road surfaces, neat straight cut of the asphalted road surface will be carried out using saw cutter. The asphalt layer between the cuts will then be demolished and transported away to a dump yard approved by the Company.

5.4.5

As soon the excavation work is completed, inspected and accepted, pipeline work shall be carried out by mechanical team in accordance with relevant drawings.

5.4.6

The backfilling of the pipe trench/road crossing shall be done as per approved project drawings, specifications, and in accordance with project procedures.

5.4.7

Installation of reinforced concrete slabs above the top of the pipe on compacted backfill shall be implemented only on the area where track crossings or gatch road crossings are indicated on the drawings. Concrete slabs shall be in accordance with project drawings and specifications.

5.4.8

As soon as the area is cleaned, restored and accepted, remove all traffic signs, barriers, and drums etc. that are no longer required and re-open the road for traffic.

5.4.9

Crash barriers shall be installed on both side of road crossing as per the approved project drawing.

5.4.10

Inspection results shall be recorded in Attachment – 6.

5.4.11 5.4.11.1

Bored / Cased / Wadi Crossing Separate Method Statement shall be submitted for the execution of Road Crossing Activities by Bored / Cased / Wadi Crossing.

5.5 5.5.1

Stockpiling of Pipes Coated pipe shall not be stockpiled more than permitted levels high and must be placed on sleepers which support the ends of the pipe sections, to avoid distortion anywhere on pipes. Sleepers shall be shaped to prevent deformation or damage to the ends of the pipe sections or the coating and the following shall be followed: i)

Care must be taken not to overstress or kink the pipe during loading.

ii) Suitable slings and lifting hooks shall be used and shall be approved prior to use. iii) All pipes shall be suitably numbered and stacked for traceability, identification and easy removal for usage. iv) Attached sketch (Attachment-2) shall be referred for stock piling activities. 5.6

Stringing and Hauling

5.6.1

Stringing activities shall comply with the requirements of Project Specific procedure no.: 08572-TRHT-EGCB-QC-AP-022

5.7

Cold Bending

5.7.1

Cold bending shall comply with the requirements of Project Specific procedure no.: 08572-TRHT-EGCB-QC-AP-026

08572-TRHT-GCB-QC-AP-027

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PROJECT: TINRHERT FIELD DEVELOPMENT PROJECT-EPC1 DOCUMENT:

QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

5.8 5.8.1 5.8.2

Procedure -Welding General Requirements Welding procedure shall be qualified in accordance with the requirements of API 1104 and Company project specification 08572-TRHT-AQ-QC-00-OO-212 Welding Procedure qualification test shall be conducted in the presence of the Company Representative.

5.8.3

The welding procedure and welders shall be subjected to approval of Company before any production welding begins.

5.8.4

Welding machine shall be maintained in a condition that ensures acceptable performance, safety of personnel and continuity of operation.

5.8.5

Storage and control of consumables shall comply with the requirements of Project Specific Consumable Control Procedure 08572-TRHT-EGCB-QC-AP005

5.8.6

Welding procedure specifications shall be approved by the Company and shall be qualified in accordance with the applicable welding code. Previously approved welding procedure qualification record can be utilized after the Company approval.

5.8.7

A welder is only allowed to execute welding for which he has been qualified.

5.8.8

Earthing connection shall not be welded to the pipe and only suitable clamps which do not cause arcs, shall be used.

5.8.9

Separate Qualification test shall be carried out for Automatic or SemiAutomatic Processes.

5.9 5.9.1

Fit-up and Main line Welding Aligning and welding shall be made to form a continuous pipeline.

5.9.2

Coated pipes shall be supported on pads maintaining a ground clearance of minimum 40 cm which is suitable for welders to perform the welding and coating application.

5.9.3

Each pipe ends shall be thoroughly cleaned to remove all dirt from inside of pipe before laying in position for welding.

5.9.4

Heat resistant material shall be wrapped over the entire circumference of pipe on each side of cut back during welding to protect coating.

5.9.5

The open end of pipe shall be closed at the end of days work with an overnight cap and long section of piping ends shall also be capped.

5.9.6

Weld joints shall not be left in a partial completed state. If this is unavoidable, then minimum of 3 passes shall be welded, and joints shall be wrapped with Thermal insulating material for slow and uniform cooling.

5.9.7

Adequate weather shielding shall be provided before, and during welding.

5.9.8

No dirt or debris shall be allowed inside the pipe prior to alignment. All beveled pipe ends for each joint and the area adjacent there to, shall be thoroughly cleaned to remove paint, rust, mill scale or dirt to avoid defects in the weld.

5.9.9

Internal line-up clamps shall be used for all pipe sizes and shall not be removed prior to the completion of root pass. Where it is impracticable to use internal line-up clamps (tie-in welds, pipe to fittings, golden weld etc.,) external clamps shall be used. External Line-up clamps shall not removed until 50%

08572-TRHT-GCB-QC-AP-027

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PROJECT: TINRHERT FIELD DEVELOPMENT PROJECT-EPC1 DOCUMENT:

QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

minimum of the root pass has been completed and is evenly distributed around the pipe circumference. 5.9.10

For welding process, filler material, interpass temperature, removal of clamp and other parameters shall be as per approved WPS.

5.9.11

An individual joint identification number shall be given and marked with waterproof paint on the pipe surface adjacent to the joint prior to the commencement of the welding. Hard stamping shall not be used.

5.9.12

The pipe on both sides of the joint shall not be raised lowered or otherwise moved until both root and hot pass have been completed.

5.9.13

Daily Pipeline welding/visual inspection shall be carried out after completion of welding as per the ITP 08572-TRHT-EGCB-QC-AQ-012. Report shall be submitted to contractor, company for approval as per Attachment -3.

5.9.14

Proximity of welds a) Adjacent circumferential (girth) welds in pipelines shall be separated by a minimum distance of 500mm for pipes of outside diameter less than 450mm and 750mm for pipes of outside diameter equal to and greater than 450mm. This is applicable for welding of straight run pipelines which excludes piping and tubing systems. b) The minimum separation between the branches, fittings and attachment welds to other welds shall be greatest of :

5.9.15

-

Diameter of branch/fitting but not less than 150mm

-

Six (6) times the wall thickness of the thickest component

-

150mm

Weld seam orientation a) Where longitudinal seam welded pipe is used, the pipe shall be positioned such that the longitudinal weld is located in the upper half of the pipe circumference. In case of bends, the longitudinal seam shall be located in the neutral zone of bend. b) The longitudinal or spiral welds of adjacent pipes shall be offset by lesser of 90o or a circumferential distance of 250mm.

5.9.16

During Welding, the pipes shall be supported on pads at 2.0 meters either sides of the weld joint by maintaining the ground clearance of minimum 0.45 meters for SMAW welding & 0.6 meters for FCAW welding to perform the welding. After completion of welding one of the supported pads shall be removed.

5.10

Non Destructive Examination (NDE)

5.10.1

All NDE work shall be according to API 1104, and Company project specification 08572-TRHT-AQ-QC-00-OO-212

5.10.2

All NDE work shall be carried out by approved contractor and approved NDE procedures.

08572-TRHT-GCB-QC-AP-027

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PROJECT: TINRHERT FIELD DEVELOPMENT PROJECT-EPC1 DOCUMENT:

QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

5.11 5.11.1

Welding Repair WPS for weld repairs shall be submitted together with corresponding WPQR for Company approval prior to commence of the work. Welding repair shall be performed as per the qualified and approved repair WPS.

5.11.1

Welding repair shall be performed as per the qualified & approved repair WPS.

5.11.2

Only two attempts per repair shall be permitted.

5.11.3

Final NDE for repair welding shall be performed in accordance with the NDE requirements for the original welding.

5.11.4

All repair welding shall be recorded in Attachment -4.

5.12 5.12.1

External Coating using Heat Shrink Sleeve Heat shrink sleeve application shall comply the requirements of Project Specific Procedure 08572-TRHT-EGCB-QC-AP-025.

5.13

External Coating using High Build Polyurethane

5.13.1

External Coating using High Build Polyurethane Coating shall comply the requirements of Project Specific Procedure No.: 08572-TRHT-EGCB-QC-AP025

5.14

Holiday test/Lowering and Laying

5.14.1

Pipe sections shall be lowered into the trench after completion of Welding, NDT, Heat shrink sleeve application, holiday testing and necessary Trench survey clearance. Center line of pipeline to be marked inside the trench. The maximum welded section that can be lowered in one time shall be max. 1000mtr. Suitable capacity and sufficient number of side booms certified by third party shall be used at the time of Lowering and Laying.

5.14.2

All coated pipe shall be handled with approved cradles spreader bars and nonabrasive belts designed to prevent damage to the protective coating. Belts shall have a width suitable to the pipe diameter, and all lifting equipments shall be approved by the company prior to use.

5.14.3

When pipe is lifted off skids, immediately before lowering into the trench, a holiday detector set at the voltage specified for the type of coating, shall be run over the coated pipe. All defects shall be repaired in accordance with the applicable coating repair procedures applicable to the specific type of coating.

5.14.4

The trench shall be maintained in a dry condition during the pipe lowering operation. Depth of bedding shall be minimum 150 mm. Bedding material shall be soft sand with a maximum particle size of 3 mm. Bedding material may be graded desert fill, graded excavated material or dune sand and shall be free of organic material.

5.14.5

Inspection notification shall be given 24 hour prior to start lowering with the details of Sections to be lowered. In no case shall the bending stress induced on the pipe during laying operations exceed the design criteria as specified for the pipe material or 85% of the pipe SMYS

5.14.6

On completion of backfill and hydrostatic pressure test, Contractor shall perform an over the trench Pearson Survey to confirm the integrity of the coatings. Any section indicating holidays shall be repaired by Contractor

5.14.7

Pipeline Holiday testing and lowering shall be recorded in Attachment -5.

08572-TRHT-GCB-QC-AP-027

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QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

5.14.8

Road crossing section, casing pipe, carrier pipe, holiday test, spacer installation, carrier pipe insertion and lowering shall be performed as per project approved drawings, and shall be recorded as per Attachment -6.

5.15 5.15.1

Padding and Backfilling Padding material shall be graded desert fill, graded excavated material or dune sand but shall be free from organic matter. Depth of padding shall be minimum 150 mm. Soft sand shall be maintained at the both sides of the pipe.

5.15.2

Backfilling shall be performed as per the approved project drawing and Company specification. Backfill material no greater than particle size 50mm shall be graded desert fill or graded excavated material but shall be free of clay, coral, oil contaminated, organic or combustible materials, excessive fines, rock and debris.

5.15.3

Backfilling shall follow the lowering operation as closely as possible so the minimum amount of ditch will remain open but in no case more than 1,500 metres. The pipe shall be padded no later than the evening of the day that the pipeline was laid. Complete backfilling shall follow initial backfilling by no more than 48 hours. The selected fine padding material shall be carefully placed around the installed pipeline and carefully compacted until the level of 200 mm above the pipeline crown at compacted state is reached. Pipeline identification/warning tapes shall be provided approx. 200 mm above top of pipe. Following padding the trench shall be back filled and compacted in layers not exceeding 250 mm,with suitable excavated materials containing no rocks or other objects larger than 75 mm, no stumps, large clods of dirt, carbonaceous material or other foreign materials which could damage pipe coating or cause voids in the back fill. The density of the compacted backfill shall not be less than 95% of the adjacent undisturbed soil at the same depth.

5.15.4

5.15.5

5.15.6

5.15.7

Berm shall be constructed as per the approved project drawing and Company specification.

5.16 5.16.1

Tie-In Welding Welding work shall be performed as per the approved welding procedure and as per the applicable code API 1104 for tie-in welding.

5.16.2

During the line-up operation, longitudinal shall be offset as per the requirements specified under sections 5.9.14 and 5.9.15 - “Proximity of welds/Weld seam orientation” in this procedure.

5.16.3

Pipe number, heat number and length shall be transferred on any cut portion of the pipe for traceability.

5.16.4

A bell hole below the joint shall be prepared to perform tie-in welding. 5.16.6 All general requirements of welding shall be maintained during tiein welding.

5.16.7

Heat shrink sleeve application / High Build Polyurethane Coating and holiday test shall be performed on each tie-in locations, after approval of NDE.

5.16.8

All tie-in welding shall be recorded in Attachment – 4.

08572-TRHT-GCB-QC-AP-027

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DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

5.16.9

Soft sand Bedding, post padding and backfilling shall be carried out as specified in Para 5.14 & 5.15 of this procedure for tie-in locations.

5.17 5.17.1

Pipeline Clearance and Protection Requirements Clearance requirements for buried pipelines cables, underground structures Buildings and Housing Projects shall be as per Company Standard 08572-

5.18 5.18.1

Weld map & Pipe book All the records of welding of pipeline shall be incorporated in the form of weld map and shall be submitted to contractor, and company for review and approval as per Attachment -8.

5.18.2

All the records of pipeline construction shall be incorporated in the form of pipe book and shall be submitted to contractor, and company for review and approval as per Attachment-7.

5.19 5.19.1

Pipeline Marker Pipeline permanent marker shall be installed at every 1000 meter location along the pipeline above the centerline of the trench, also each point of intersection and each existing crossing.

5.19.2

Pipeline Marker format shall be as per approved project drawing, and shall be approved by company prior to fabrication and installation.

5.19.3

Pipeline Route Marker shall be installed as per the Specification 08572-TRHTSP-PL-XX-OO-XXX.

5.20 5.20.1

Cathodic Protection System Separate procedure shall be submitted for the Cathodic Protection System as per Company Specification 08572-TRHT-SP-MT-89-EU-201 Cathodic Protection and design requirements.

5.21 5.21.1

Final Clean-up All surplus and defective material lying after construction of pipe line, such as trash, refuse and unusable spoil material shall be collected and disposed off to a suitable location designated by the company.

5.21.2

ROW shall be maintained regularly to its original contour and condition.

5.21.3

All fencing, temporarily removed / relocated shall be reinstated to its original location and original conditions. All areas disturbed during construction shall be dressed up and restored to its original state.

5.22

CLEANING, GAUGING, HYDROSTATIC TESTING AND DEWATERING

5.22.1

Separate procedure shall be submitted for the cleaning,gauging, hydrostatic and dewatering as per Company Specification 08572-TRHT-SP-PL-18-OO224 and shall implement the requirements.

5.23.

Documentation

5.23.1

As-Built Drawings and Pipe Book shall be as per 08572-TRHT-SP-PL-18-OO224

08572-TRHT-GCB-QC-AP-027

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PROJECT: TINRHERT FIELD DEVELOPMENT PROJECT-EPC1 DOCUMENT:

QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

5.24 5.24.1

Safety Before commencement of excavation for each day relevant PTW (permit to work) shall be obtained by all concerned authorities.

5.24.2

All safety aspects shall be in accordance with Project HSE Plan and compliance with Company Fire and Safety Regulations.

5.24.3

At the start of each day’s work, all mechanical excavation equipments shall be inspected by Sub Contractors qualified mechanic to avoid interruptions in the day’s work.

5.24.4

During excavation, at the end of completion of each day’s work sufficient mechanical barricades will be provided all around periphery of excavation with safety warning tapes and flash lights.

5.24.5

PPE (Personnel Protective Equipment) like Safety shoes, helmets, safety glass, safety ear plugs, coveralls and protective gloves which are mandatory shall be worn by all the labor force during work.

5.25

PIPELINE FACILITIES Pipeline facilities shall be completed in accordance with the following requirements.

5.25.1

Above Ground Facilities All above ground facilities shall be constructed in accordance with the requirements of the alignment sheets, construction drawing and Specification supplied with the Contract. All aboveground facilities, including pipe spans, scraper traps, manifolds, valve assemblies, vent pipe and hoods, guard rails, marker posts, metering facilities, and other designated facilities shall be painted. At the transition from below ground to above ground the linepipe shall be coated with an additional layer of heat shrink sleeve for a vertical distance of 500 mm below and above the ground. The above ground section and 100 mm of the below ground section of the additional layer of heat shrink sleeve shall be coated with a layer of UV resistant coating to protect the heat shrink sleeve from the effect of UV.

5.25.2

Anchor Blocks When specified, anchor blocks shall be installed in accordance with the requirement of the construction drawings and alignment sheets. Foundation, formwork, reinforcement, and concrete shall be in accordance with the construction drawings .The anchor block shall be completed before hydrostatic testing.

08572-TRHT-GCB-QC-AP-027

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PROJECT: TINRHERT FIELD DEVELOPMENT PROJECT-EPC1 DOCUMENT:

QUALITY CONTROL PROCEDURE PIPELINE CONSTRUCTION

DOCUMENT NO: 08572-TRHT-GCB- QC-AP-027

6.0

ATTACHMENTS

6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8

Attachment-1 Attachment-2 Attachment-3 Attachment-4 Attachment-5 Attachment-6 Attachment-7 Attachment-8

08572-TRHT-GCB-QC-AP-027

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- Crossing of Existing Facilities - Sand Berm (Sketch) for Stock piling - Daily Pipeline Welding / Visual Inspection Log. - Daily Tie-In, Station and Repair Welding Log - Pipeline Holiday Test and Lowering Report - Road Crossing Section Report - Pipe Book - Weld Map

DAILY PIPELINE WELDING/ VISUAL INSTPECTION LOG CLIENT

CONTR NO.: PROJ. NO.:

PROJECT

Sub Contract No.:

CONTRACTOR Report No.:

SUB CONTRACTOR

WELDER IDENTIFICATION Material Spec.

Line No.: Length (Pipe 1)

Pipe Number (Pipe 1)

Heat Number (Pipe 1)

Length (Pipe 1)

Pipe Number (Pipe 2)

Heat Number (Pipe 1)

OD (inch)

Thickness (mm)

WELD NUMBER

WPS No.

FIT-UP DATE

CHAINAGE NO.

ALIGNMENT SHEET NO.

ROOT PASS

HOT PASS

L

L

R

R

L

FILLING

FILLING

FILLING

FILLING

1

2

3

4

R

L

R

L

R

L

CAP

Date of Welding

5 R

L

R

NAME DESIGNATION SIGNATURE DATE

08572-TRHT-GCB-QC-AP-027

Page16

VISUAL INSPECTION

Date:

PIPE DATA

HSS REQT.

08572-TRHT-GCB-QC-AP-027

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PIPELINE HOLIDAY TEST AND LOWERING REPORT CLIENT PROJECT

CONTR NO. : PROJ. NO :

CONTRACTOR

Sub Contract No.

:

Report No. SUB CONTRACTOR

Date

Line Identification. Pipeline Unit Section inspected

From

KP

To

KP

Holiday Test carried out

Length

YES

m

NO

PIPELINE CHARACTERISTICS Nominal pipe size

NPS

Pipe thickness

(mm)

Type of coating : Welding of section to be laid are all accepted

YES

NO

Coating of welding joints carried out

YES

NO

Trench as per Drawing

YES

NO

Trenching Clearance

YES

NO

Sand Bedding Clearance

YES

NO

Released for Lowering

YES

NO

CIVIL CLEARANCE

REMARKS :

NAME DESIGNATION SIGNATURE DATE

08572-TRHT-GCB-QC-AP-027

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CLIENT

CONTR NO.:

PROJECT

PROJ. NO.:

CONTRACTOR

SUB CONTR. NO.:

SUB CONTRACTOR

REPORT NO.: DATE: TRENCHING / BACKFILLING INSPECTION RECORD

Sl. No. 1

Description Trenching:

1.1

Type of Soil

1.2

Trenching as per Drawing

1.3

Trenching Clearance from Ch……….…….. to Ch………………

1.4

Sand Bedding from Ch……………….. to Ch………………….

1.5

Released for Lowering from Ch……….…….. to Ch…………….

2

Backfilling:

2.1

Top of Pipe Elevation as per Drawing (Ref. Report No. _ _ _ _ _ _ _ _ _ _ _ _ _)

2.2

Released for Post Padding

2.3

Backfilling

2.4

Final inspection

NAME DESIGNATION SIGNATURE DATE

08572-TRHT-GCB-QC-AP-027

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Result

Remarks

08572-TRHT-GCB-QC-AP-027

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