QPED-9742R1 Pipe Line Construction

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07.12.03

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16.11.03

ISSUED FOR USE

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BJD

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DESCRIPTION

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QP

ONSHORE ENGINEERING DEPARTMENT

PROJECT/CONTRACT No.: PROJECT TITLE:

DOCUMENT TITLE:

SPECIFICATION FOR PIPELINE CONSTRUCTION

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ONSHORE ENGINEERING DEPARTMENT DOC NO.

CONTRACT NO. QPED-9742

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DATE: 07 DECEMBER 03


FRONT PAGE CONTENTS ABBREVIATIONS

CONTENTS 1.0 SCOPE...................................................................................................................................5 1.1 GENERAL ..............................................................................................................................5 1.2 DEFINITIONS & ABBREVIATIONS .............................................................................................5

2.0 REFERENCE CODES, STANDARDS AND SPECIFICATIONS .................................5 2.1 2.2 2.3 2.4

CODES & STANDARDS ...........................................................................................................5 PROJECT SPECIFICATIONS ....................................................................................................6 QP STANDARDS ....................................................................................................................6 BP SPECIFICATIONS ..............................................................................................................6

3.0 PRE-CONSTRUCTION SURVEY......................................................................................7 4.0 FENCE AND TEMPORARY GATES ................................................................................7 5.0 GRADING OF CONSTRUCTION ROW AND CARE OF EXISTING FEATURES....7 6.0 UNLOADING, STOCKPILING, HAULING AND STRINGING OF MATERIALS.......9 7.0 DITCHING INCLUDING ROCK EXCAVATION ........................................................... 11 8.0 CROSSINGS...................................................................................................................... 13 9.0 FIELD BENDS ................................................................................................................... 14 10.0 LINING-UP AND WELDING............................................................................................ 15 11.0 PROTECTIVE COATING OF LINE PIPE AND FIELD JOINTS................................ 17 12.0 PRE-PADDING.................................................................................................................. 17 13.0 LOWERING-IN................................................................................................................... 17 14.0 TIE-INS................................................................................................................................ 18 15.0 WASHOUTS AND DRAINAGE....................................................................................... 19 16.0 PADDING AND BACKFILLING OF THE TRENCH .................................................... 19 17.0 SPECIAL INSTALLATIONS ON THE PIPELINE........................................................ 21 17.1 GENERAL ............................................................................................................................21 QPED-9742R1



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17.2 INSTALLATION OF VALVE STATIONS .....................................................................................22 17.3 INSTALLATION OF P IG L AUNCHERS AND RECEIVERS .............................................................22 17.4 INSTALLATION OF INSULATION JOINTS ..................................................................................23 17.5 INSTALLATION OF LOCATION IDENTIFICATION MARKERS .......................................................23

18.0 FINAL TESTING................................................................................................................ 23 19.0 CATHODIC PROTECTION TEST STATIONS AND LINE MARKERS.................... 23 20.0 IMPRESSED CURRENT GROUNDBEDS.................................................................... 24 21.0 FINAL CLEAN-UP OF THE CONSTRUCTION RIGHT-OF-WAY ............................ 24 22.0 AS-BUILT DRAWINGS AND PIPE BOOK ................................................................... 24 22.1 AS-BUILT ALIGNMENT SHEETS ............................................................................................25 22.2 PIPE BOOK ..........................................................................................................................25

23.0 QUALITY ASSURANCE.................................................................................................. 26

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ABBREVIATIONS QP

QPED-9742R1

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Qatar Petroleum

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1.0

SCOPE

1.1

General This specification covers the minimum requirements for the various activities to be performed by the Contractor for the installation of buried and above ground pipelines transporting gas and associated onshore facilities for Qatar Petroleum. Contractor shall execute the work in compliance with all local laws, by-laws, ordinances, regulations, and shall provide all plant, services and labour inclusive of supervision thereof. The Contractor shall provide all materials, equipment and appliances, whatsoever in nature required for the execution of the work, whether temporary or permanent. Contractor shall be deemed to have inspected and examined the work area(s) and its surroundings and to have satisfied himself, so far as practicable, as to the form and nature thereof, the extent and nature of work and the means of access to work areas. Contractor shall be deemed to have obtained all necessary information as above mentioned as to risks, contingencies and all other circumstances, which may influence the work. Special condition shall be applied in constructing pipelines in the Ras Laffan Industrial and Mesaieed Industrial Area.

1.2

2.0

Definitions & Abbreviations Client

QP

Contractor

EPIC Contractor

Consultant

Design Consultant to the EPIC Contractor

QP

Qatar Petroleum

EPIC

Engineering, Procurement, Installation and Commissioning

Contract

Agreement between QP and the EPIC Contractor

ROW

Right of Way

Easement

All land provided by QP to be used by Contractor to site plant

GIS

Geographic Information System

REFERENCE CODES, STANDARDS AND SPECIFICATIONS The work shall comply in all respects with the latest editions of the listed codes and standards, unless otherwise amended by this Specification.

2.1

Codes & Standards ASME B31.8

Gas Transmission and Distribution Pipeline Systems

API RP 1102

Steel Pipelines Crossing Railroads and Highways

API 1104

Standard for Welding of Pipelines and Related Facilities

PFI – ES -24

Pipe Bending Tolerances-Minimum Bending Radii. Minimum Tangents

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CSWIP

Certification Scheme for Welding Inspection Personnel

BS 7361

Cathodic Protection Part 1 - Code of Practice for Land and Marine Applications

ISO 9001 - 2000

Quality Management Systems-Requirements

NACE -RP 0572

Design, Installation, Operation and (latest edition/revision) Maintenance of Impressed Current Deep Ground Beds.

Project Specifications QPED-9724

Specification for LSAW Line Pipe (Amendments / Supplements to API Spec 5L)

QPED-9725

Specification for Seamless Line Pipe (Amendments / Supplements to API Spec 5L)

QPED-9750

Specification for Pipeline Pre-Commissioning

QPED-9746

Specification for Pipeline Hydrostatic Testing

QPED-9747

Specification for Pipeline Cleaning, Gauging and Flooding

QPED-4200

Specification for Impressed Current Cathodic Protection System for Pipelines

QPED-9744

Specification for Pipeline Markers

QPED-9749

Specification for Blasting and Use of Explosives

QP Standards QP-SPC-L-002

Standard Specification for Painting and Wrapping of Metal Surfaces

QSP-QC-09

Quality System Requirements for Projects Standard Specification Volume1 - Civil Works

2.4

QP-SPC-L-005

QP Technical Specification for Plant Applied FBE External Coating of Pipelines

QP-SPC-L-006

QP Technical Specification for FBE Coating for Field Applied Pipeline Earth Weld Joints

QP-SPC-L-007

QP Technical Specification for Heat Shrink Sleeves for Corrosion Protection of Pipeline Earth Would Joints

BP Specifications BP – GS 118-9

Welding of Transmission Pipelines - Supplementary to API 1104

In case of any conflict between the requirements of this specification and the referenced codes, standards and specifications, the following precedence shall be applicable: a. Laws and degrees of the State of Qatar b. This Specification c. Project Specifications QPED-9742R1



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d. QP Standards/Specifications e. BP Engineering Standards f.

Other International Codes and Specifications

3.0

PRE-CONSTRUCTION SURVEY

3.1

The proposed pipeline routing is shown on the Pipeline Alignment Sheets and routing Drawings enclosed with the Construction Contract. It shall be Contractor’s responsibility to perform a construction survey control and to stake the entire pipeline route on the ground from the data available on the Pipeline Route Plans for the pipeline. the construction survey control shall be staked at a maximum of 50 meter intervals on the tangents and at 10 meter intervals on the curves. The numbering system shall be continuous. All staking shall be on the ditch centreline with reference points established for each centreline stake, but offset by 25 meters from the ditch centreline. Contractor shall clear and level the construction easement to a degree required to support all WORK scope activities.

3.2

The Contractor shall not start any construction work on the easement until the Client has approved the right-of-way control staking.

4.0

FENCE AND TEMPORARY GATES

4.1

Prior to clearing or grading of right-of-way or stringing of pipe, the Contractor shall open fences during the construction right-of-way and install temporary gates therein. Adjacent Posts shall be adequately braced to prevent slackening of the wire. The Client shall approve material and construction of fences and temporary gates.

4.2

Before such fences are opened, the Contractor shall notify the owner or tenant and the Client, and where practicable, the opening of fences shall be in accordance with the wishes of said owner or tenant. After fences have been opened and temporary gates have been installed, the Contractor shall be responsible for any loss or inconvenience accrued by the owner or tenant by virtue of his fences having been opened or the gates not having been shut or attended at all time. The Contractor shall be liable to any damage, claims or actions arising from such temporary openings in fences.

4.3

Where woven, hog wire, or other special types of fences are encountered, the Contractor shall ensure that the temporary fences are made of similar material and are of suitable quality to serve the purpose of the original fence. In some cases, it may be necessary for the Contractor to station watchmen at gates in order to ensure that no stock or cattle get in or out of the field. The Contractor shall be particularly diligent in maintaining the gates and fences along and crossing the right-of-way and on access roads.

5.0

GRADING OF CONSTRUCTION ROW AND CARE OF EXISTING FEATURES

5.1

Contractor shall do such grading of the right-of-way as is required to properly perform the pipeline construction, and to provide access to the pipeline during the construction period.

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The permanent right-of-way for the pipeline shall be a strip of land 20m wide in total, 10m on either side of the pipeline centreline. 5.2

Contractor shall grade the right-of-way to eliminate sharp high points, fill all low points, minimise bending and maximise laying within the limits permissible for elastic bending in a way that combined stress due to (i) internal pressure and (ii) stress due to pipe bending does not exceed the allowable stress value for the pipe material. Calculations shall be submitted to show the stress generated due to bending and that combined stress (as explained above) is below allowable stress value for the pipe material. The calculations for pipe bending stress shall be carried out in accordance with ANSI B 31. 8. and performed with the aid of a proprietary stress analysis programme fully authenticated and accepted by the majority of the major companies in the oil and gas industry. For example The Caesar II programme marketed by COADE Int. Alternatively, the pipe can be cold bent to enable installation following the natural contour of the ground. In rocky sections Contractor shall excavate rock or other material, which cannot be graded off with normal grading equipment in order to build an adequate working space along the pipeline route. Locations where easement or permit restrictions limit the right of way width constitute an exception to the latter requirements, as do circumstances at specific locations where a lesser width is unavoidable for whatever reason.

5.3

The right of way width shall be as indicated in the typical pipeline installation standards enclosed with the Contract. Where the construction of the right-of-way passes over, through or along roads, paths, pole lines, or any other improved or confined areas, Contractor shall grade only the width of the right-of-way necessary for digging the pipeline trench and constructing the pipeline. In areas, which require a greater width for construction activities, prior approval of the Client shall be obtained. Where the construction R.O.W. passes through Sabkha (loose sand or soil) area, fill material duly approved by the Client, shall be provided to support construction equipment.

5.4

Contractor shall perform all necessary grading at road crossings and at any other location required to permit the passage of construction equipment.

5.5

Contractor shall submit to Client a detailed proposal of the precautions to be taken in providing temporary fencing and other protective devices according to each situation, to avoid damaging existing pipelines, electrical lines and cables, fences, roads, drainage, irrigation systems and any other existing above or below ground structures, or property, adjacent to or crossing the pipeline being constructed.

5.6

Contractor shall perform any clearing necessary to accommodate the installation of the pipeline and related facilities. Any tree shall be carefully removed by procedures agreed with the Client and relocated or replanted as directed by the Client. Great care shall be taken of cultivated ground. For these areas the topsoil shall be carefully removed and protected against erosion and contamination by blown sand and kept for reinstatement by Contractor after the pipeline is constructed.

5.7

Any archaeological monuments and remains uncovered during trenching and right-of-way clearance shall be brought to the attention of the Client immediately on discovery.

5.8

The Contractor shall stop operations in the area of an archaeological find until the significance and extent of the find is determined and the Client gives approval to proceed with the work and instruct Contractor of any special action(s) to be taken.

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5.9

During any work on pipelines influenced by high voltage lines, safety measures are necessary for the protection of personnel. These protective measures shall be detailed in Contractor's Safety Manual. This shall include protection to cranes, side booms and all other construction equipment.

5.10

Contractor shall obtain from the operator and owner of any existing pipelines a permit-to-work within 10 metres either side of existing pipelines. Provision of a permit-to-work by QP does not release Contractor from obligation of obtaining relevant permits to expose or work near utilities/facilities not under QP area or responsibility. Example: S.E.D., Q.N.T.S., M.E.W. Q-TEL etc.

5.11

When the bund is removed from any existing pipeline or cable for access by construction traffic, Contractor shall clearly indicate its buried route by pegs and warning signs. Contractor shall protect the existing facility from vehicle wheel loads (30t. axle load) by the placement of protective slabs as approved by the Client. Bunds of existing lines so removed shall be replaced to its original condition.

5.12

A maintenance access road shall be constructed by Contractor concurrent with the ROW along the route of the pipeline through all Sabkha areas. The road shall require compaction and grading as per other areas. The grade level of the ROW after consolidation and compaction of the fill shall be as per the applicable installation standards, drawings and other specifications issued with the Contract. The Contractor shall also grade a maintenance way along the ROW of the pipeline, such that year-round vehicular access along the pipeline routes is available, for maintenance. Contractor shall make full provision for ramps, temporary cross-overs, etc. for crossing tracks and above ground pipelines to permit the crossing of men and machinery for the purpose of continuous ROW preparation. Their continued availability to vehicular and other traffic shall be ensured. The banks and structure of each crossing shall be preserved. No existing crossings shall be filled or otherwise obstructed without approval of the Client. The Contractor shall be liable for any and all remedial work required as a result of damages to existing pipelines and associated equipment, tracks, roads, highways and all other utilities caused by him. The Contractor shall carry out remedial work as and when required by the Client.

6.0

UNLOADING, STOCKPILING, HAULING AND STRINGING OF MATERIALS

6.1

Contractor shall unload, stockpile, load, haul and string all materials and shall make all necessary arrangements and agreements and detailed procedures have to be submitted for the Client’s approval.

6.2

Contractor shall be responsible for maintaining the pipeline in good condition. All end caps removed for inspection shall be replaced. Nesting of pipes is not permitted. The method of stacking pipes shall be subject to review by the Client. It is Contractor's responsibility to ensure that no distortion of pipe shape or any other damage occurs during storage and pipe laying operations.

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6.3

Contractor shall be responsible for providing suitable trucks and equipment in sufficient quantity to transport materials to construction sites in accordance with agreed schedules.

6.4

Contractor shall prepare a procedure describing the methods of inventory and material transfer so as to provide accurate accountability of all material at all times during the contract.

6.5

Contractor shall use a Pipe Traceability System that shall enable control and tracing of all pipes from source through to its "as built" position.

6.6

Contractor shall handle pipe with equipment of a suitable capacity using approved, nonmetallic, non-abrasive slings, spreader bars, and protected hooks. The slings, spreader bars and hooks shall have necessary certificates of approval from approved Inspecting Authorities before loading or unloading is commenced. Pipes shall not be rolled into or from conveyances, nor handled in any manner, which distorts the round form of the ends, or scratches, gouges or dents the pipe. Pipes shall not be dragged along the ground.

6.7

Any damage to the bare pipe or coating resulting from hauling, stockpiling, subsequent handling or any other cause shall be repaired by Contractor at Contractor's expense. The Client shall be notified prior to any repairs taking place.

6.8

Pipes strung on the construction right – of - way shall be protected by setting the pipe in a manner that shall cause no damage to the pipe coating.

6.9

Pipe stringing in rock ditch areas shall not be permitted until ditching is complete.

6.10

Pipe shall be strung in such a manner as to result in the least amount of interference to the normal use of the land crossed, and gaps shall be left at approximately 500 m intervals or at existing tracks to permit the use of the land and the passage of equipment, or other normal traffic across the construction right-of-way.

6.11

Materials shall be stored, hauled to the site of the work and assembled on the site in accordance with vendor and supplier instructions and Contract Specifications as to prevent damage.

6.12

Contractor shall be fully responsible for providing and paying for all storage areas.

6.13

Contractor shall be responsible for construction and maintenance of any necessary temporary roads for the construction of the pipeline.

6.14

Contractor shall be responsible for any repairs to existing roads or any property damaged by hauling and stringing operations.

6.15

Pipe shall not be strung on the ROW more than three kilometres in advance of the mainline welding, unless specifically permitted in writing by the Client. All materials other than linepipe, shall not be stored on the ROW, but shall be transported to the installation site, in a covered conveyance on the day of use. The timing of issue of materials will be as per Client approved work schedule. Stored materials shall be protected from ground surfaces by use of timber. Ground surfaces in Storage areas shall be clean and flat. Fragile materials shall not be stored or transported in more than one layer. Welding Consumables shall be stored under clean, dry conditions in accordance with manufacturers recommendations, where possible, in their original unopened containers

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until required. Electrodes shall be stored and handled in an orderly manner to prevent damage. Coating materials shall be suitably stored and protected so that they do not deteriorate as a result of exposure to high thermal conditions or adverse weather conditions. Deteriorated materials shall not be used and shall be replaced by the Contractor.

7.0

DITCHING INCLUDING ROCK EXCAVATION

7.1

Contractor shall stake the centreline of the pipeline and flag the limits of the working area of the right-of-way in accordance with Construction Drawings approved by the Client. Contractor shall excavate the pipeline trench on the staked centreline of the pipeline in a manner and to a standard approved by the Client.

7.2

Contractor shall employ equipment and methods to keep the ditch to the line established regardless of the type of soil and rock encountered and regardless of the depth of excavation necessary.

7.3

Contractor shall furnish all equipment, materials and supplies necessary for the completion and maintenance of the ditch, including shoring, and sheet piling, dewatering and any other incidental for the completion of the work in an approved manner.

7.4

To minimize the required number of bends to lay the pipe in conformity with the contour of the ground and maintain the minimum standard cover, the Contractor shall cut the trench slightly deeper at the crest of ridges and by gradually deepening the trench in approaches to crossings of roads, highways, ditches, creeks, rivers, ravines and other water courses. The Contractor, wherever practicable, shall eliminate unnecessary bending by operating the trenching machine at various depths and not by grading the right – of - way.

7.5

Contractor shall carefully preserve all sets and/or benchmarks set by the Client. Contractor shall be liable for any extra expense due to his failure to maintain such stakes/bench marks.

7.6

All trenching shall be carried out in compliance with the applicable typical installation drawings issued with the Contract. Normally the trench shall be excavated to a minimum width so as to provide, on both sides of the installed pipeline, a clearance as indicated in the typical installation drawings and to a depth sufficient to provide the minimum cover specified. The minimum cover shall be measured from the top of the pipe coating to the top of the undisturbed surface of the soil, or top of graded pipeline right-of-way, whichever is smallest. Fill material or migrating sand (sand dune) in right-of-way will not be considered to add to the depth of cover. However, surface of the fill material placed to fill low points to accommodate pipe-bending limitations may be used to determine depth of cover subject to Client approval. When the construction pipeline passes through Sabkha areas, the pipeline shall be laid in accordance with the applicable typical installation drawings included in the Contract. A pad of selected bedding material shall be placed around the pipe to cover the pipe to a depth of 150 mm as specified in Clause 16.2 of this specification.

7.7

The use of explosive blasting techniques shall only be permissible upon written approval from QP. In sections where the Contractor requests to use explosive blasting techniques,

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Contractor shall keep trenching operations ahead of stringing, bending and welding operations unless permission to perform the construction work in another manner is obtained in writing from the Client. 7.8

No blasting shall be allowed without prior and due notice given to adjacent work crews and other interested parties and written approval of the Client. Every possible precaution shall be taken to prevent injuries and damages to persons and properties.

7.9

The Contractor shall apply for the necessary permits and shall fully comply with the laws, rules and regulations of the jurisdictional authority governing the importation, handling, hauling, storage, accounting/inventory control and use of explosives in QATAR.

7.10

The Contractor shall comply with requirements of applicable Project Specification enclosed with the Contract and the blasting procedures approved by the Client. Contractor shall comply with all local regulations in force at time of blasting and obtain all required approvals from relevant local Authorities and interested parties.

7.11

Contractor shall notify the Client of its intent to use explosives at least three (3) weeks in advance of any blasting or import of materials. The size of the charge shall be determined by Contractor in accordance with Project Specifications and approved procedures. The size shall be based on trial blasts performed at an approved location. Vibration levels shall be recorded at various distances from the blast location.

7.12

Contractor shall make use of blasting blankets and pads to prevent damage to coated pipe and nearby structures, including communication towers and power lines. Contractor shall protect ground structures, such as cables, conduits, pipelines, water springs, wells and underground watercourses in accordance with the approved procedure.

7.13

Contractor shall remove all scattered rock and debris caused by the blasting to dumping areas approved by the Client.

7.14

Contractor shall use only experienced workmen with proven experience and certification to supervise, handle and use explosives. The certification and licenses duly approved by competent authorities shall be submitted to the Client prior to work commencement.

7.15

Contractor shall properly dispose of all explosive packaging materials and in no case shall they be disposed of in the backfill of the trench. Disposal methods shall be described in the procedures and approved by the Client.

7.16

In all cases and in any locations where, in the opinion of the Client, the use of ditching equipment may cause damage to property crossed by the right of way, the ditch shall be hand excavated.

7.17

Contractor shall use detectors or other devices to locate foreign installations that may be crossed or encroached upon.

7.18

Contractor shall maintain the trench in good condition until the pipe is lowered in.

7.19

It is intended that there shall be a minimum amount of hand grading of the trench bottom. To accomplish this, Contractor shall, as far as practicable, excavate vertical faces and flat bottom for the trench. Contractor shall do such hand excavation in the trench as is necessary to free the bottom of the trench of loose rock and hard lumps and to trim other foreign matter from the

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bottom and sides of the trench. The trench bottom and sides shall be free from any hard objects (sharp rocks or otherwise) so that the pipe and coating are not damaged, punctured or abraded. 7.20

Contractor shall obtain plans and details of all existing and planned underground services from the relevant Local Authorities and shall follow these plans closely at all times during the performance of work. Contractor shall locate all existing underground utilities and structures by electronic scanning and by hand excavation in areas where services are known to exist.

7.21

Mechanical / hydraulic rock breakers shall not be used within two (2) meters of existing pipelines or cables.

7.22

If jackhammers are required to be used within two (2) meters of any buried pipelines and between any pipelines running in the same easement, circumferential pipe protection (approved by the Client) shall be provided by Contractor before commencement of work.

7.23

Existing pipelines, utilities and foreign installation shall be excavated using hand tools before allowing mechanical equipment to operate within five (5) meters. Precautions must be taken at these exposed pipe/bund areas to ensure that no erosion of the soft sand fill takes place during trenching operations.

7.24

Prior to exposure of any existing pipelines or utilities, Contractor shall erect a barrier in accordance with approved procedures to prevent any damage to the pipelines or utilities. This is particularly important where there are heavy vehicles in the vicinity and the possibility that removal of the bund for trenching operations opens up an unauthorised vehicle crossing. When trenching between pipelines in the same easement, vehicle access between the pipelines shall be maintained.

8.0

CROSSINGS

8.1

Where the pipeline crosses road, existing pipelines, water lines, cables, conduits or other underground structures of any kind, Contractor shall dig and grade the trench to a depth meeting the requirements indicated in the installation standards and drawings enclosed with the Contract. Contractor shall carry out necessary site investigations to establish all details that are required to install the crossing, Contractor shall prepare and submit to Client individual and detailed crossing installation procedure and drawings and obtain in writing the Client’s approval.

8.2

Contractor shall provide supports for all foreign services during the construction operations including concrete slabs/beams. A procedure shall be submitted to the Client for approval.

8.3

Prior to ditching, all buried services shown on Pipeline Route Plan Sheets shall be exactly located on site by Contractor, in order to prevent damages by heavy ditching equipment and proceed to expose the service by hand excavation.

8.4

In locations where the trench is cut across roads, paths, wadis, walkways, and other access routes, temporary bridges shall be provided. Contractor will evaluate each situation and the proposed solution will be submitted to the Client for approval.

8.5

Bypass roads as required by and in accordance with the regulations and code of practice of the State of Qatar Ministry of Public Works shall be constructed in accordance with

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procedure, in order to allow the passage of normal traffic with a minimum of inconvenience and interruption. Arrangements with local Police shall be made as required. 8.6

Whenever, it is permissible to open cut a paved road crossing, the paving shall be removed and replaced in accordance with the restrictions and requirements of the Ministry of Public Works having jurisdiction thereof.

8.7

Where possible Contractor shall arrange to complete the trenching, laying and backfilling of such crossings and to remove the temporary bridging before the end of the regular work day.

8.8

Warning signs and barricades shall be placed and maintained while such crossings are open. If the crossings are open at night, Contractor shall provide and use, electrically operated warning lights or lanterns in accordance with the requirements of the responsible authorities and, if necessary, provide a watchmen.

8.9

Breaks in the bund for a vehicle crossing at every Two Kilometer Post (KP) shall be constructed as a track crossing. This provision does not apply to pipelines in existing energy corridors where no corresponding crossing is provided over the existing pipelines. In existing energy corridors the Client will instruct Contractor on the correct location for such crossings. Crossing will be constructed in accordance with the approved drawings.

8.10

The sections of pipeline route crossing under overhead power line way shall be laid in accordance with the applicable typical installation drawings included in the contract. Contractor shall provide trench crossing at other location as necessary to permit other Contractors to perform their work with a minimum of inconvenience and interruption. Where the pipeline crosses above ground pipelines, a culvert shall be installed over the existing pipeline along the construction access road. The culvert and crossing shall be constructed in accordance with Client Approved drawings. Where the pipeline crosses buried pipelines, a concrete slab shall be installed over the existing pipeline along the construction access road. The slab and crossing shall be constructed in accordance with Client Approved drawings. Protection provided along the construction access roads shall be left in place to be used for maintenance and inspection purposes. The width and design axle loads shall be as per the Contract document.

9.0

FIELD BENDS

9.1

Contractor shall make all necessary pipe bends required in the construction of the pipeline, but may at his option use hot induction bends for installation at points where the use of such bends is preferable. Use of factory bends at any particular location shall have prior written approval of the Client.

9.2

Contractor shall furnish competent Clients and assistants necessary for determining location and size of all bends. The Client shall review such bends.

9.3

Contractor shall bend the pipe to conform to the grade and horizontal alignment of the trench. Field bends shall be required at all points where the change in grade or horizontal alignment is such that the pipe will not conform to such changes by elastic bending within the design stress value permitted by the Code.

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Field cold bending in no case shall be less than forty (40) times the outside diameter of the pipe being bent. In larger change of slope, elastic bend shall be permitted only where the combined stress (bending stress + stress due to internal pressure) does not exceed allowable stress value. No tie-in shall be performed on the elastic bend section. 9.4

The bending machine utilised shall be capable of making bends without wrinkles and buckles. The pads, dies and rolls of the bending equipment shall have soft surfaces to avoid damage to the pipe coating. Bending machines shall be of a type to be approved by the Client and shall be suitable for bending coated pipe in accordance with a Client approved procedure.

9.5

Contractor shall, before start of the work, submit and demonstrate to Client a bending procedure which shall conform with the recommendations of the manufacturer of the bending machine. The procedure shall include as a minimum, step-length, maximum degree per pull and method and accuracy of measurement during pulling of the bend. This procedure and the equipment used shall be submitted to Client for approval. Contractor shall employ an experienced Bending Client, who will supervise the bending of pipe in accordance with approved procedures and will ensure uniform bearing under the pipeline and will maintain the required depth of cover indicated on Alignment Sheets. Cutting of factory made bends and cold field bends for any purpose is not permitted.

9.6

All bends shall be of a uniform radius and the curvature shall be distributed over as great a length of pipe as is reasonably possible. The configuration of field bends shall be in accordance with the following: Bending shall not be made within 2 m of the end of a joint of pipe or girth weld. The longitudinal weld of the pipe shall be on the neutral axis of the pipe. For side bends, the longitudinal weld of the pipe shall be on the top of the pipe. For sag and over bends the longitudinal weld shall be on the side of the pipe. No bend shall be acceptable if the difference between the largest diameter of the pipe and the smallest diameter, at any point in the bend, is more than 2.5% of the inside diameter. Before any bend is incorporated in the pipeline it shall be tested for ovality with a gauging plate of a diameter not less than 95% of pipeline inside diameter.

9.7

All factory made bends shall be provided with anti-corrosion coating in accordance with QP standard QP-SPC-L-005

9.8

Damage to yard applied coating due to bending of line pipe shall be made good in accordance with QP standard QP-SPC-L-005.

10.0 LINING-UP AND WELDING 10.1

Contractor shall align and weld together the joints of pipe into a continuous pipeline, and all welds in the pipeline made by Contractor shall be of strength equal to that of the pipe. Welding acceptance criteria shall be in accordance with API Standard 1104 (latest edition) and as amended by BP 192.

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Welds shall comply with welding procedures to be submitted to the Client for approval. 10.2

Coated pipe shall be temporarily supported on padded supports giving a ground clearance not less than 0.3 m. according to detailed procedures to be submitted to the Client for approval.

10.3

Each pipe joint shall be thoroughly swabbed to remove all dirt and foreign matter from the inside of the pipe before the joints are lined up and welded. The swabbing operation shall not be carried out on more than six (6) pipe joints ahead of the stringer bead welders. Where the pipeline is welded in long sections by the firing line method, the ends of the long sections shall be capped in accordance with the procedures to be approved by the Client, until the long sections are tied-in. During the laying operations, close attention shall be given to open ends to insure an open and clean line free of any obstructions. All precautions shall be taken to prevent water from entering the pipeline. The open end of the line shall be securely closed at the end of each day's work to prevent entrance of small animals or the introduction of foreign matter of any nature and shall not be reopened until work is resumed. Contractor shall remove all obstructions in the line after the completion hereof. Tack welding of end caps to the line pipe is not permitted. Contractor shall be responsible for the repair of all internal and/or external pipe defects to the extent that they are acceptable to the Client. Acceptability of defects in the pipe detected during inspection at work site shall be determined in accordance with Project Specification for line pipes or ASME B31.8 whichever is more stringent. If, due to cutting or repairs, the pipe identification number is removed, the Contractor in the presence of Client shall reprint it immediately. No pipe without identification number shall be transported and/or welded into the pipeline.

10.4

Contractor shall ensure during the line-up operation that longitudinal welds are offset and are in accordance with API 1104 as amended by BP GS 118-9. All pipe joints 10” NPS and above shall be aligned with an internal line-up clamp approved by Client except for tie-in welds or other exceptional conditions approved by Client on which occasion an external line-up clamp may be used.

10.5

All welding procedures, welder and NDT personnel shall be qualified in accordance with the W.P.S. and all pipe fittings and Contractor shall furnish coupons required for these qualifications. The material used for qualifications shall be the same pipe as that procured for the Project. The material shall be metallurgically selected for the weld qualification test. A qualified authority approved by the Client shall certify all testing facilities, welding and Non Destructive Examination procedures used by Contractor. Pipelines constructed within the area of high voltage lines may be electrically influenced by these high voltage lines. The induced voltage caused by the influence may at times be high enough as to pose a danger to personnel working on the pipeline. The Contractor shall specify detailed safety aspects of working under such conditions in the Contractor’s Safety Manual.

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11.0 PROTECTIVE COATING OF LINE PIPE AND FIELD JOINTS 11.1

The pipeline shall be protected by an external coating as detailed in QP standard QPSPC-L-005.

11.2

Contractor shall furnish all materials, equipment, labour and supervision and shall be responsible for cleaning, priming and coating valves fittings, connections and appurtenances, together with re-cleaning, re-priming and re-coating to meet the specification.

11.3

The coating of pipeline field joints, tie-ins shall be made in accordance with QP standard QP-SPC-L-005 & QP-SPC-L-006 and procedure to be submitted to the Client for approval.

11.4

Repairs to coatings shall be made in accordance with the QP Standard QP-SPC-L-007 and to the procedure as recommended by the coating material manufacturer. Contractor shall make a detailed inspection of the coating for holidays and imperfections with a holiday detector immediately preceding the lowering in of the pipe as specified in QP Standard QP-SPC-L-007 for the pipe coating and QP standard QP-SPC-L-005 & QPSPC-L-006 for the field joints. Contractor shall furnish high voltage electric holiday detectors set to manufacturer's recommendations.

11.5

All holiday and damaged places in the coating shall be repaired by Contractor until the detector has passed over the entire pipe joint without disclosing any holiday or imperfections in the coating.

11.6

The Client shall inspect the coating condition shall be inspected by the Client prior to backfilling. Contractor shall handle coated pipe at all times with equipment designed to prevent damage to the coating according to a detailed procedure duly approved by the Client.

12.0 PRE-PADDING 12.1

All trenches shall be padded to the required depth before lowering-in of the pipeline. No padding shall be placed until the Client has inspected and approved the trench.

12.2

Only dune sand having a particle size of less than 3.0 mm shall be used as pre-padding material. The sand shall be free of rock, metal parts, nuts and other debris.

12.3

The bottom of the trench shall be padded with sand throughout its length, whether in normal ground or rock, so as to provide a minimum compacted thickness as specified in Contract Drawings.

13.0 LOWERING-IN 13.1

Contractor shall provide side booms, cradles slings and equipment to support the pipe during lowering in.

13.2

Contractor shall lower-in the pipe into the trench after the coating and wrapping of field joints.

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13.3

Pipe shall not be lowered into the trench until after pre-padding of trench bottom. Contractor shall request and receive approval from the Client prior to lowering-in any pipe.

13.4

Contractor shall be required to provide padded slings for handling coated pipe. The use of belting reinforced with wire cable shall not be permitted. Lowering-in method shall be described in a procedure to be submitted to the Client for approval. However, the use of pneumatic cradles is preferred. A holiday detection survey shall be run continuously behind the cradle and any repairs necessary shall be made prior to bedding the pipe in accordance with the approved procedure.

13.5

The handling of the pipe shall be done in such a way and in accordance with procedure, and shall ensure that the pipe in its final position in the trench is free of abraded spots or holidays.

13.6

Where water is present in the trench no lowering-in shall be permitted until the ditch has been dewatered to the extent and for the time necessary to make visual inspection by the Client of the bedding material on which the pipe is to be laid. Following such inspection the presence of water shall be permitted provided that it is not so high as to cause cave in of the walls of the trench or floating of the pipeline before padding and back filling, when weighting of the pipe is not provided. Where the expected water, after construction may cause flotation or buoyancy, weight coating approved by the Client shall be applied on the pipe.

13.7

Care shall be exercised while removing the slings from around the coated pipe after it has been lowered into the trench. No sling shall be put around field joint coating.

13.8

All measurements required for the preparation of “as-built” drawings, to the extent required, shall be made prior to backfilling.

14.0 TIE-INS 14.1

Contractor shall do all work necessary to tie-in separate welded sections of the pipeline into a continuous system.

14.2

All bevelling, aligning and welding shall be done in accordance with Specification. API 1104, as amended by BP Specification GS 118-9.

14.3

Welding after the pipe has been lowered into the ditch (bell hole welding) shall be done only where sufficient clearance had been provided to enable the welder to exercise normal welding skill and ability.

14.4

The provisions of Clause 6.6 of this specification as regards handling of the pipe shall apply.

14.5

The protective coating of tie-in welds shall be done in accordance with Clause 11.3 of this specification.

14.6

All pipes 2 meters or more in length cut off at tie-in points shall not be allowed to accumulate but shall be moved ahead daily as the work progresses and welded into the pipeline at tie-in locations as directed by Client.

14.7

Contractor shall observe the maximum and minimum tie-in temperature to be used based on the prevailing temperature conditions and the calculations reports as submitted by the Contractor for approval by the Client.

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Contractor shall perform tie-in as soon as practicable after lowering-in of the strings. Extended periods between lower - in and tie-in shall only be allowed when specified tie-in temperatures cannot be reached. Backfilling and tie-in temperature shall be determined by the contractor to ensure laying stresses are within acceptable limits. 14.8

If a pup is to be added for a tie-in, the minimum length that may be used shall be 1.5 m. Two or more such pipes shall not be welded together. All tie-in welds shall be 100% radiographically and ultrasonically examined. All welding and NDT shall be in accordance with the applicable specification enclosed with the Contract and the approved welding procedure.

15.0 WASHOUTS AND DRAINAGE 15.1

Wherever the possibility exists of washouts due to surface water run-off (e.g. wadis or upwelling of underground water), Contractor shall provide washout protection for the pipeline and install drainage so that the original watercourse is reinstated in accordance with approved Project drawing.

16.0 PADDING AND BACKFILLING OF THE TRENCH 16.1

Contractor shall pad and backfill the trench after the pipe is in place as set forth in the applicable typical installation standards and Client approved drawings.

16.2

Contractor shall supply all padding material for pipe bedding and padding. Only dune sand having a particle size of less than 3 mm shall be used for pipe bedding and padding.

16.3

If excavated material is the same material as described in Clause. 16.2, it shall be used for bedding and padding. In areas, where excavated material is not suitable for padding, the padding material to be placed around the pipe for a minimum cover, as specified in the Contract drawing and shall be as described in the Clause 16.2 above. The remaining backfill may be completed with excavated material provided it is free from organic material and does not contain stones larger than 100 mm in diameter. In Sabkha areas, Contractor shall supply and haul material to form the berm and bund in accordance with the approved drawings. In areas containing buried cables, backfilling shall not be performed until all tiles have been replaced and all cables have been supported and protected to Client’s satisfaction.

16.5

Contractor shall grade the trench bedding material to give the maximum amount of support to the pipeline when lowered into place. The material shall be compacted to the degree specified on the construction drawings and as approved by the Client.

16.6

Contractor shall place padding material in such a manner as to cause no damage to the pipe coating and compact it to the degree specified in the construction drawings as approved by the Client. The depth of padding shall be such as to give the pipe, in place, the specified clearance from the hard material, as per typical installation drawings approved by the Client.

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Contractor shall not commence the padding operation until the Client has inspected and approved the lowered-in pipe. If any backfilling is done without Client's approval, the Client shall have the right to require removal of the backfill for examination, and the cost of such uncovering shall be borne by Contractor. Contractor shall survey and record "as built" measurements, including location and record pipe joint numbers and welds before padding material is placed. Before backfilling the trenches at the crossings, inspection by other Government Departments and agencies including maintenance of their utilities shall be allowed.

16.8

Padding material to cover the pipe shall be applied immediately after the trench is approved for back-filling to give shade and protection. Padding material shall be as shown on the construction drawing, and as approved by the Client.

16.9

Pipe being lowered into the pipe trench shall be covered with padding material at the end of each working day to give shading and protection.

16.10 After padding operations are complete, the backfill and bund installation shall take place as specified in the typical installation standards and Client approved construction drawings. The bund shall not be constructed in areas where evidence of running water or wadi, can be found. Contractor shall obtain the Client’s approval for the wadi crossing proposals where the bund removed to allow the wadi flow to pass through. The pipeline construction in these wadi-crossing areas shall be buried and protected with concrete slabs as shown in the typical installation standards and as approved by the Client. 16.11 Backfill material shall be piled over the ditch to at least 1 metre above original ground and the exterior of the bund reinforced with rock as soon as possible for stabilization as specified on the approved construction drawings. 16.12 In rocky areas, the pipeline bund shall be constructed using desert fill or excavated material. Bund material shall be free from organic material and course graded. Fines shall be placed at the bottom of the bund with 150 mm particles and greater on the top. Bund angle shall be less than the normal angle of repose for the bund material as per the approved construction drawings. 16.13 Compaction of padding and bedding material shall be in accordance with typical installation standards and approved construction drawings. The backfill around existing facilities shall be compacted by hand. Where the trench has been excavated through tracks, etc., all backfill shall be thoroughly compacted to 95% Proctor Density. This will have to be followed up by stabilisation of the surface of the backfill with suitable material. In all cases, the Contractor shall comply with the requirement of Authorities concerned. At the end of each day’s work, backfill shall not lag more than 1000 metres behind the head end of lowered-in pipe, which has been approved for backfill. Where Wadis or roads are graded, trenched or otherwise disturbed, the Contractor shall restore the property to its original contour and conditions to the satisfaction of the Client and relevant Authorities.

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17.0 SPECIAL INSTALLATIONS ON THE PIPELINE 17.1

General

17.1.1 In addition to constructing the pipeline, Contractor shall also install other facilities and appurtenances as described in the Contract Scope of Work. The work required to complete the installations shall include all site surveys, site preparation, filling, grading, fencing, foundations, installation of block valves, side and vent valves, pipe work, pipe supports, pressure gauges, mechanical facilities, civil work, painting, electrical and instrumentation works. All works shall be as per applicable specifications, approved drawings and as directed by the Client. 17.1.2 Dimensional Tolerances The following dimensional tolerances apply to inline items and connections for other lines. These tolerances can be exceeded on items such as vents, drains, dummy supports, field supports, temperature and pressure connections, where the deviation will not affect another spool. a. General dimension such as face to face, face or end to end, face or end to centre, and centre to centre: ± 3 mm. b. Inclination of flange face from true in any direction: 4 mm per meter. c. Displacement of branch connection from indicated location: ± 1.6 mm. When multiple branches are involved, the displacement of the branches shall not exceed 3 mm from a common point. d. Rotation of flange boltholes shall not exceed 1.6 mm. 17.1.3 Flanged Connections Contractor shall ensure that all flange faces are parallel and centred, according to standard practice, prior to final bolting. For flanges 8” NPS and below, bolts shall be tightened in diagonal sequence and shall be centred with equal amounts of thread visible on both sides. For flanges 10” NPS and above, bolts shall be tightened by hydraulic tensioning (e.g. Hydrotight) alone. The hydraulic tensioning equipment and procedure shall be Client Approved. Bolts that yield during tightening shall be removed and discarded. It is mandatory that a torque wrench is used for bolt tightening. The effect of lubricants on bolts shall be taken into account in calculating the target torque. 17.1.4 Welded Connections Where the ends of the piping components being welded have an internal surface misalignment exceeding 1.6 mm, the wall of the component extending internally shall be trimmed by machining so that the adjoining internal surfaces will be approximately flush. Whenever the welding of pipes with different wall thickness is encountered, the Contractor shall apply weld profiles in compliance with the ASME B31.8. Required tapering shall be carried out by the Contractor accordingly. All welding shall be performed in accordance with API 1104 as amended by BP Specification GS 118-9. 17.1.5 All exposed surfaces such as piping, valves, structures, and miscellaneous appurtenances shall be painted in accordance with the Standard Specification QP-SPC-L002. The corrosion coating on pipe surface will end approximately 0.3 meter above the finish grade and it will be necessary for Contractor to provide a clean interface at junction QPED-9742R1



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of the protective coating and the paint. All buried flow tees, and other in-line fittings shall be coated with a suitable coating compatible with the main line coating. Factory made bends shall be applied with coating as per QP standard. Contractor shall develop a coating procedure and submit to Client for approval, prior to implementation. 17.2

Installation of Valve Stations Valve stations shall be installed as shown on the approved drawings. It is Contractor’s responsibility to have the units completely assembled, tested and made fully functional, including all related instruments, equipment, etc. Valves with flow arrows shall be installed according to the normal flow direction in the pipeline. During welding, the valves shall be in fully open position. Care shall be take to avoid entry of sand particles etc. to valve body, seals etc. during transportation, storage, assembly and installation. All inline assemblies shall be prefabricated and tested hydrostatically ex-situ as per applicable specification. All such assemblies shall be installed at the locations shown in the drawings only after successful completion of the hydrostatic test and dewatering. Contractor shall carry out necessary excavation, cutting, bevelling and welding of the tieins required for the installation of such assembly. The tie-in joints shall be radiographically examined over 100% length and also 100% ultrasonically examined prior to back filling. All works shall be executed in accordance with the relevant specifications issued for the purpose. Valve stations shall be provided with all relevant sign boards/markers as per the typical installation standards enclosed with the Contract and as per approved construction drawings.

17.3

Installation of Pig Launchers and Receivers Pig launcher/receiver stations shall be fabricated and installed as per the approved drawings and, whenever applicable, as per the requirements of Clause 17.2 of this specification. It is Contractor's responsibility to have the units completely assembled, tested and made fully functional including all instruments and related piping, equipment, etc. It shall be Contractor's responsibility to maintain elevations shown on the approved drawings and to carry out any pipe work adjustments, necessary for this purpose. Field cuts shall be square and accurate and field welds shall not be performed under stress of pipe ends. The hydrostatic testing of the pigging assemblies shall be performed after installation, in accordance with the relevant specifications. All pig handling devices including lifting devices shall be installed as per the manufacturer’s recommendations and as per the Client approved drawings. Pig launcher/receiver stations shall be provided with all relevant sign boards/markers as per the typical installation standards enclosed with the Contract and as per approved construction drawings.

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Installation of Insulation Joints Insulating joints shall be installed at the locations shown in the approved drawings. Insulating joints shall be electrically tested before welding into the pipeline. The electrical conductance test shall be carried out using a ‘Megger’. Measurement of the insulation resistance across the joint shall be approx. five (5) Mega Ohm. The tests shall be repeated after installation and welding of the joint into the pipeline to verify that the assembly is undamaged.

17.5

Installation of Location Identification Markers Location Identification markers shall be installed on the pipeline prior to backfilling in accordance with Clause 7.0 of Specification for Pipeline Markers No. QPED-9744.

18.0 FINAL TESTING 18.1

The pipeline shall be cleaned and gauged in accordance with Specification QPED-9747 and hydrostatically tested in accordance with Specification QPED-9746.

18.2

After completion of hydrotesting, the R.O.W. shall be repaired of any damage, which may have occurred during the testing operations.

18.3

An electromagnetic coating attenuation (DCVG) survey over the entire length of the buried pipelines shall be performed in accordance with the approved procedures. In addition, a “close-potential” survey shall be performed in accordance with approved procedure. If the condition of the coating is found to be unsatisfactory, the Contractor shall, at his expense, uncover the pipe, repair the coating and replace the padding and backfill.

18.4

Cooperation with other testing operations related to the pipeline construction shall be maintained by Contractor.

19.0 CATHODIC PROTECTION TEST STATIONS AND LINE MARKERS 19.1

Combined cathodic protection test stations and line markers shall be installed in accordance with approved Drawings.

19.2

Combined cathodic protection test stations/line markers shall be installed at every one (1) kilometer intervals and at road, track, wadi or foreign pipeline crossings and as shown on the Pipeline Route Plan Sheets. The markers shall be of an approved type visible from the air and as per the typical installation drawings enclosed with the contract.

19.3

A temporary system to protect the pipelines during construction and prior to the commissioning of the permanent system shall be installed as per Specification No. QPED-4200. Current span test stations shall be installed at all impressed current ground bed locations as shown on the Pipeline Route Plan Sheets and approved drawings as per Specification No. QPED-4200. Installation temporary and permanent cathodic protection items shall be pre-agreed with Client and Client shall witness the installation of CP system.

19.4

All test leads shall be checked according to the approved procedure for continuity after backfill, and those found broken or otherwise defective shall be repaired. All permanent

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cathodic protection items that require installation on the pipeline shall be installed prior to hydrotesting.

20.0 IMPRESSED CURRENT GROUNDBEDS Transformer rectifiers, anodes, carbonaceous backfill, cables and grounding cells shall be installed at the locations detailed in accordance with Specification QPED-4200 and Client approved drawings.

21.0 FINAL CLEAN-UP OF THE CONSTRUCTION RIGHT-OF-WAY 21.1

After material and rock bund placement above the back-filled trenches has been carried out in accordance with approved drawing, the construction right-of-way shall be restored to its original contour and condition to the approval of the Client.

21.2

All surplus and defective materials for the construction of the pipelines and all refuse and unusable spoil materials shall be collected for disposal in an appointed location. Special attention shall be given to the removal of left over electrodes in the ROW and the trenches. Electrodes shall be removed on a daily basis.

21.3

Selected loose rock exposed by the construction operations which is scattered over the right-of-way or adjacent property shall be graded and hauled by Contractor to an approved site.

21.4

The construction right-of-way shall be graded smooth and surface soil shall be carefully replaced in accordance with the procedure approved by the Client.

21.5

All fences cut or damaged shall be repaired by installing new sections of fencing equal to or better than the sections cut or damaged. Temporary gates shall be removed and replaced by new fence sections in accordance with typical approved drawings.

21.6

Crushed rock shall be applied to cover areas as shown on drawings. Disturbed areas during construction shall be dressed and gravel surfaced areas shall be reworked to finish condition. The crushed rock shall be limestone material.

21.7

Land drains disturbed by construction operations shall be reinstated to the satisfaction of the Client and owner.

21.8

The final right-of-way shall be graded smooth enough to provide access to regular maintenance vehicles.

21.9

Final clean up must not lag more than 5 kilometres behind the completion of backfilling.

22.0 AS-BUILT DRAWINGS AND PIPE BOOK Contractor shall prepare as-built drawings and Pipe Book for the complete works in accordance with the Project Specification no. QPED-9745, enclosed with the Contract. All data shall be in an electronic format suitable for inclusion in the QP GIS database. The data shall be provided in ESRI (Environmental System Research Institute) shape file format in Qatar National grid (QNG 95) co-ordinate system.

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As-Built Alignment Sheets Contractor shall take all readings and measurements necessary to incorporate as-built status of the pipeline, incorporating the following:

22.2

-

Horizontal location of the pipeline with regard to the Grid

-

Levels of the ground and pipeline with regard to Mean Sea Level

-

Changes of pipe wall thickness, material and pipe coating

-

Location and details of valves, fittings, bends, insulating joints, appurtenances etc. and fencing

-

Location and identification of buried utilities and pipe pipeline crossing the new pipeline

-

Location and identification of markers

-

Location and type of special backfill, padding and anchoring

-

Location of ROW with respect to pipeline

-

Type of soil/rock (sub-soil stratification)

-

Location of further appurtenances (Pig-signallers etc.)

-

Type of excavation method used

-

Reinstatement of roads, pavements etc.

-

Isometric drawings of pipeline facilities

Pipe Book Pipe and welding book shall contain the following information: -

Title of Project and segment thereof

-

Page sequential number

-

Length brought forward for pipes

-

Length to bring forward for pipes

-

Alignment sheet numbers

-

Diameter, wall thickness and material of the pipeline

-

Length of each pipe, including length of pipe per page

-

Pipe numbers

-

Location and identification of field bends, hot induction bends, and other in-line fittings

-

Cut and re-numbered pipe ends

-

Type of coating of the pipeline and field joint

-

Date of stringing

-

Date of welding

-

Weld number

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Welder number, and/or identification

-

Equipment used for radiography

-

Inspection and Testing Certificates

-

Operating / Maintenance Manual for mechanical, electrical and instrumentation equipment

Sample format of Pipe and Welding Book shall be submitted to the Client for approval prior to its implementation. In addition, other information such as crossing details, station drawings shall be updated to show the as-built status.

23.0 QUALITY ASSURANCE During the life of this Project, the Contractor’s Quality System Requirements shall be in accordance with QP Document no. QSP-QC-09 in conjunction with ISO 9001:2000. The Contractor shall ensure that his sub-contractors operate a Quality System meeting the specified conformance criteria. The Contractor’s Quality System shall be subject to approval prior to commencement of the works. The Client reserves the right to conduct a Quality Audit at any stage during the Project.

QPED-9742R1

QPED-9742R1 Pipe Line Construction

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