MASTER-30-99-23-0114-1

Table of Contents 1.

SCOPE OF THIS DOCUMENT............................................................................................ 4

2.

DEFINITIONS & ABBREVIATIONS .................................................................................... 4

2.1

DEFINITIONS.................................................................................................................. 4

2.2

ABBREVIATIONS............................................................................................................ 5

3.

REFERENCES, CODES, STANDARDS AND SPECIFICATIONS....................................... 6

3.1

REFERENCES ................................................................................................................ 6

3.2

CODES AND STANDARDS............................................................................................. 6

SECTION 1 AMENDMENTS / SUPPLEMENTS TO 31.40.50.30-Gen ................................................................8 1.3

Definitions .......................................................................................................................................................8

SECTION 2

GENERAL REQUIREMENTS ........................................................................................................8

2.1

Basic Requirements ......................................................................................................................................8

2.2

Pre-commissioning Plan...............................................................................................................................8

2.4

Pre-commissioning Records and Reports .................................................................................................9

SECTION 3

HEALTH, SAFETY AND ENVIRONMENT ........................................................... 9

3.1

Discharges......................................................................................................................................................9

3.2

Hazardous Materials ...................................................................................................................................10

SECTION 4

EQUIPMENT.......................................................................................................10

4.2

Filters, Pumps and Compressors..............................................................................................................10

4.4

Welding of Temporary Equipment ............................................................................................................10

SECTION 5 5.1

Pig Selection ................................................................................................................................................10

SECTION 6 6.1

DEWATERING....................................................................................................11

General .........................................................................................................................................................11

SECTION 7 7.1

PIGGING REQUIREMENT..................................................................................10

FINAL CLEANING ..............................................................................................11

Introduction ...................................................................................................................................................11

SECTION 8

DRYING ..........................................................................................................11

8.1

Introduction ...................................................................................................................................................11

8.2.1

General .........................................................................................................................................................12

Project No.: MASTER

Amendment/Supplement to Precommissioning of Pipelines

ADCO DOC. NO.: 30-99-23-0114 REV. 1 PAGE

DATE:SEP 2014 2 OF 17

8.3

Vacuum Drying ............................................................................................................................................12

8.3.1

General .........................................................................................................................................................12

8.3.7

Filling Phase .................................................................................................................................................12

8.4

Dry Air and Nitrogen Drying .......................................................................................................................13

8.5

Glycol Swabbing ..........................................................................................................................................13

SECTION 9

CONDITIONING AND PRESERVATION.........................................................13

9.1

Conditioning by Inhibition............................................................................................................................13

9.2

Preservation After Drying ...........................................................................................................................13

SECTION 11 11.1

COMMISSIONING ..........................................................................................14

General .........................................................................................................................................................14

APPENDIX 1 SCOPE OF WORK CHECKLIST .........................................................................15

Project No.: MASTER




1. SCOPE OF THIS DOCUMENT This specification defines the minimum requirement for Pipeline Pre-Commissioning and preservation to be used for onshore steel oil, gas and water pipelines unless otherwise exception has been specified in this specification. This specification shall be read in conjunction with the following other document: SHELL DEP Specification “Pre-commissioning of Pipelines” DEP 31.40.50.30-Gen (DEP Specification) version 36. All clauses of above referred SHELL DEP shall be applicable, unless specifically cancelled / amended by this Specification.

2. 2.1

DEFINITIONS & ABBREVIATIONS DEFINITIONS COMPANY

ADCO (Abu Dhabi Company for Onshore Oil Operations) Wherever the word “Principal” is used in SHELL DEP, the same shall be replaced by the word “COMPANY”, with the same authorities / responsibilities as defined in SHELL DEP

CONTRACTOR

The party which carries out all or part of the design, engineering, procurement, construction, commissioning or management of the project. Contractor includes its approved manufacturers, vendors, suppliers and subcontractors. Requirements of this specification shall be enforced at all levels of the contractor's procurement and construction process. The company shall have access to all contractor suppliers to the same extent as required of contractor.

VENDOR

Once the order ENTITY/SUPPLIER

SUBCONTRACTOR

Any person or persons, firm, partnership, corporation or combination thereof (not being an employee of CONTRACTOR), including vendors to whom any part of the works has been subcontracted by CONTRACTOR

SHALL

Indicates a mandatory requirement

SHOULD

Indicates a strong recommendation to comply with the requirements of this document

is

placed,

the

selected

Project No.: MASTER




2.2

ABBREVIATIONS ADCO ADNOC API

Abu Dhabi Company for Onshore Oil Operations Abu Dhabi National Oil Company American Petroleum Institute

ASME

American Society of Mechanical engineers

ASTM

American Society for Testing Materials

CS

Carbon Steel

DEP

Design & Engineering Practice

FEED

Front End Engineering Design

ID

Internal Diameter

ITP

Inspection and Test Plan

mm

Millimetres

MPS

Manufacturers Procedure Specification

NACE

National Association of Corrosion Engineers

NDE

Non Destructive Examination

NDT

Non Destructive Testing

OD

Outside Diameter

PWHT PQR PT

Post Weld Heat Treatment Procedure Qualification Record Dye Penetrant Test

SSCC

Sulphide Stress Corrosion Cracking

WAG

Water Alternative Gas

WPS

Welding Procedure Specification

WPQ

Welding Procedure Qualification

UAE

United Arab Emirates

UT

Ultrasonic Test

Project No.: MASTER




3.

REFERENCES, CODES, STANDARDS AND SPECIFICATIONS

3.1

REFERENCES This specification should be read in conjunction with the latest editions, revisions & amendments of the following Specifications, National or Industry Standards and COMPANY documents.

3.2

CODES AND STANDARDS ADCO Engineering Specifications: 30-99-00-0105

Additional ADCO’s Requirement Seamless Linepipe for Sour Service

for

API

5L

30-99-12-0026

Specification for Aboveground Pipeline Construction

30-76-12-1607

Specification for Underground Pipeline Construction

ADCO Amendments/Supplements to SHELL DEPs: 30-99-00-0044-1

Amendments/Supplements to Pipeline Engineering

30-99-00-0041-2

Amendment/Supplement to Welding of Pipelines and Related Facilities

31-40-40-38 A

Supplements to Hydrostatic Pressure Testing of New Pipelines

Shell DEPs: 31.40.40.38

Hydrostatic Pressure Testing of New Pipelines Pipeline Engineering

31.40.00.10-Gen. American Petroleum Institute (API): API 5L

Specification for Line Pipe

API 1110

Pressure Testing of Liquid Petroleum Pipelines

API 1104

Welding of Pipeline and Related Facilities

European Norms: EN 10204

Metallic Products Types of inspection Documents

American Society of Mechanical Engineers (ASME): ASME B31.4

Pipeline Transportation Systems Hydrocarbons and Other Liquids

for

ASME B31.8

Gas Transmission and Distribution Systems

Liquid

Project No.: MASTER




American Society for Non-Destructive Testing (ASNT) ASNT-SNT-TC-1A

Personal Qualification and Certification in NonDestructive Testing.

Europen Committee for Standardization(CEN) EN 10204

Metallic Products – Type of Inspection Documents.

British Standards (BS) BS EN 1011

Welding Recommendations for welding of metallic materials

BS EN 7448

Fracture Mechanics Toughness Tests Part 1: Method for determinationof KIc, Critical CTOD and critical Jvalue of Metallic Materials –AMD 10543;Part 2:Method for determination of KIc, Critical CTOD and critical Jvalue of welds in Metallic Materials

International Standards Organization (ISO): ISO 10474

Steel and Steel Products – Inspection Document First Edition

ISO 3183-3

Steel and Steel Pipelines – Technical Delivery Conditions- Part 3: Pipes of Requirement Class C

ISO 15156

Petroleum and Natuaral Gas Industries –Materials for use in H2S- Containing Environments in oil and gas production

ISO 9001

Quality Management: Model for quality assurance in design, development, production, installation and servicing

National Association for Corrosion Engineers (NACE): NACE TM-0177

Laboratory Testing of Metals for Resistance to Sulphide Stress Cracking in Hydrogen Sulphide (H2S) Environments.

NACE MR0175

Petroleum and natural gas industries - Materials for use in H2S-containing environments in oil and gas production

Project No.: MASTER




SECTION 1 AMENDMENTS / SUPPLEMENTS TO 31.40.50.30-Gen

1.3

Definitions Replace the word Principal in SHELL DEP by word “COMPANY” which has the following definition: COMPANY:

Abu Dhabi Company for Onshore Oil Operations (ADCO)

Wherever the word Principal is used in SHELL DEP, the same shall be replaced by the word “COMPANY”, with the same authorities / responsibilities as defined in SHELL DEP. SECTION 2

GENERAL REQUIREMENTS

2.1

Basic Requirements Replace first paragraph of specification with the following: The Contractor shall perform the pre-commissioning in accordance with this supplement to Shell DEP. Pre-commissioning should commence either immediately after completion of the hydrostatic test or prior to commissioning. As part of the Pre-commissioning Plan the Contractor will compile a data dossier for each pipeline containing all the information required to undertake the precommissioning activities. The information contained with in the dossier will be as a minimum as shown in APPENDIX 1 SCOPE OF WORK CHECKLIST.

2.2

Pre-commissioning Plan Replace second paragraph of specification with the following: The Contractor shall prepare the final pre-commissioning plan for submission to the Company for approval no later than three (3) months before commencement of the work unless otherwise specified.

NEW

Insert the following: The Contractor shall note that the Project - commissioning plan will require close coordination with the COMPANY Pipeline Operations Group for document review and approval.

Project No.: MASTER




2.4

Pre-commissioning Records and Reports Replace the first sentence from first paragraph of specification with the following: The Contractor shall take the records specified in this DEP and keep them for inclusion in the “Final Pre-commissioning Report”.

SECTION 3

HEALTH, SAFETY AND ENVIRONMENT Replace the first sentence from second paragraph of specification with the following: The Contractor shall identify and provide when gas detection and/or breathing apparatus are required for safe working practices and shall provide gas detector and/or breathing apparatus as required. Replace the second sentence from tenth paragraph of specification with the following: Maximum permissible noise levels for safe working shall be agreed with the Company and shall not be exceeded.

3.1

Discharges

NEW

Insert the following: Contractor shall not discharge to the environment any treated water, chemicals or other fluids used for dewatering or drying of the pipelines. Contractor shall submit procedures for approval by COMPANY for the collection and transportation of all treated water, associated chemicals and fluids to approved disposal sites. Contractor shall demonstrate in the procedures all contingency plans required for avoidance of any environmental damage during the works and include all necessary procedures for clean up in the event of accidental discharge of fluids to the environment, other than at agreed disposal sites. Contractor shall provide complete details of all chemicals, materials, equipment and vessels relating to potential pollution and toxicity levels, which may be used for the work. Contractor shall comply with all relevant environmental legislation and restrictions applicable to performing the works in UAE. Contractor shall be responsible for obtaining any Government permits / Approvals for the disposal of chemicals under the scope of work. Such permits shall be appended to the work permit for the start of pipeline dewatering and drying Project No.: MASTER




activities. Contractor shall allow sufficient time in his work program for Government approval of all import and disposal of any chemicals. 3.2

Hazardous Materials

NEW

Insert the following: The Contractor will identify any materials forming part of or associated with the pipeline product that would be hazardous to health or the environment during the operation and maintenance of the pipelines. Where such materials are identified, they will be analysed and COSHH data sheets (or equivalent) shall be produced for the hazardous materials.

SECTION 4

EQUIPMENT

4.2

Filters, Pumps and Compressors Relpace the third sentence from second paragraph of specification with the following: 50μm water filters, with a capacity sufficient for t he flow rates shall be provided.

4.4

Welding of Temporary Equipment Replace 4.4e of specification with the following: - welding shall be carried out accordance ADCO Engineering Specification 3099-00-0041-2

SECTION 5

PIGGING REQUIREMENT

5.1

Pig Selection Replace first paragraph denoted under (S) in the margin of specification with the following: Pigs shall be able to pass through pipelines with minimum bore and minimum bend radius and also through pipeline valves and fittings.

Project No.: MASTER




SECTION 6

DEWATERING

6.1

General Replace first paragraph from specification with the following: Hydrocarbon Service Pipelines: Pipelines shall receive full dewatering followed by low pressure nitrogen purging, to reduce the possibility of corrosion. Water Service Pipelines: Non internally coated carbon steel water pipelines also require full dewatering followed by low pressure nitrogen purging, to reduce the possibility of corrosion. However this may be waived if the water quality is considered satisfactory by the Company and final commissioning is to take place as soon as possible after precommissioning but not later than 4 weeks. The driving medium for dewatering operations shall be dry, oil free, compressed air or nitrogen. The nitrogen generation facilities or air compressors shall have sufficient volume and pressure capacity to enable the pigs to overcome the pipeline hydrostatic head.

SECTION 7

FINAL CLEANING

7.1

Introduction Delete first, second and third paragraph

NEW

Insert the following: Salt water shall not be introduced in any pipeline, however water quality shall be in accordance with ADCO amendment for SHELL DEP 31-40-40-38 A

SECTION 8

DRYING

8.1

Introduction Replace the first sentence of the first paragraph of specification with the following: The pipelines shall be dried using one of the following: 

Vacuum drying technique Project No.: MASTER






Dry air



Nitrogen

The minimum dew point requirements are as follows: Service

o

Temperature ( C)

Oil and Water flowlines

0

MOL & Transfer Lines

0

Gas Injection and production flowlines/trunklines/headers

-20

[NOTE-1]

NOTE-1: unless otherwise project specification calls for lower temperatures Valve body cavities, branch piping and dead ends shall be dewatered and dried in compliance with the defined drying procedures. 8.2.1

General Replace the first paragraph of specification with the following: Air introduced into the pipeline during dry air drying shall have a dewpoint of at o least 15 C below the final dewpoint of the pipeline.

8.3

Vacuum Drying

8.3.1

General Replace first paragraph of specification with the following: Water vapour shall be evacuated from the pipeline by vacuum units. The final dew point of the dry pipeline shall be -20°C, which is equivalent to a pressure of 1 mbar (abs).

8.3.7

Filling Phase Replace the first sentence of specification with the following: After the soak test has been successfully completed, the Contractor shall fill the pipeline with dry nitrogen to:

Project No.: MASTER




8.4

Dry Air and Nitrogen Drying Replace Section 8.4 with the following: Dry air or Nitrogen drying shall be executed consecutively in the following phases: 

Purging for drying; and



Purging for acceptance testing

Dry air or nitrogen to be introduced during drying shall have the minimum dewpoint as per section 8.2.1 of SHELL DEP 31.40.50.30-Gen 8.5

Glycol Swabbing Delete Section 8.5

SECTION 9

CONDITIONING AND PRESERVATION

9.1

Conditioning by Inhibition

NEW

Insert the following: Conditioning by inhibition shall be applicable for liquid hydrocarbon piggable pipelines at time of commissioning and introducing liquid hydrocarbon into the new pipelines. Also conditioning by inhibition shall be applied when introducing injection water into new water injection flowlines/system. Water injection system is not piggable and hense no pigs will be used. Delete Paragraphs one, two of specification and replace with the following: The Contractor shall condition the pipeline by swabbing slugs of inhibitor liquids contained between pigs through the line. The slug composition, required thickness of the liquid film on the internal pipe wall and driving medium shall be specified in the Contractor’s Pre-commissioning Plan and agreed by the COMPANY.

9.2

Preservation After Drying

NEW

Insert the following:

Project No.: MASTER




Nitrogen shall be used for pipeline inerting and preservation after drying completion. Delete bullet point one from specification and replace with the following: -

the final pressure to be achieved at the end of the filling operation for all pipelines shall be 1.5 barg above the ambient pressure at any point along the pipeline, plus a margin allowing for the maximum possible ambient temperature fluctuation during the post pre-commissioning period.

SECTION 11 COMMISSIONING NEW

Add new section

11.1

General

NEW

Insert the following: The Contractor shall execute or provide support for commissioning activities in conjunction with associated Company activities, under the direction of ADCO Operations personnel. Commissioning shall only commence following Company acceptance of pipelines dried to the requirements of this specification. The Contractor shall submit pipeline specific commissioning procedures and planned programme for Company review and approval prior to commencement of the commissioning works. This procedure shall cover all activities from displacement of dry air, pressurization of the pipeline, to normal flowing conditions. The Contractor shall execute the work in accordance with the commissioning procedure approved by the Company before commencement of work. Contractor shall be responsible for the provision of all equipment and consumables required for commissioning including any temporary piping and valves identified as being necessary for commissioning. All such temporary installations shall be removed by the Contractor on completion of satisfactory commissioning of the pipeline. Commissioning procedure shall include measures for hydrocarbon & air interfacing during commissioning for oil service pipelines.

Project No.: MASTER




APPENDIX 1 SCOPE OF WORK CHECKLIST The scope of work shall specify the pipeline precommissioning data and activities. An alphanumeric prefix references a section of Appendix A (see DEP Specification). Section Description Requirement / value 2.1 Commencement of precommissioning Yes [ ] No [ ] Immediately after hydrostatic pressure testing? Yes [ ] No [ ] or immediately prior to commissioning? ......................... Specify the date: 2.1 Sequence of precommissioning Yes [ ] No [ ] To be in accordance with this Amendment to DEP? If no, state the required sequence: ........................ ........................................................................ ........................ ........................................................................ ........................ ........................................................................ ........................ ........................................................................ 2.1/ Pipeline data 5.2 State the relevant pipeline data: .................. mm Outside diameter: .................. mm Nominal wall thickness: .................. mm Minimum bend radius: .................. mm Minimum bore: ..................... m Length: Internal volume: ................... m3 MAOP: ............bar (ga) Maximum / Minimum Design pressure: ....../........bar (ga) Maximum / Minimum Design temperature: ……../.......... °C Linepipe material: .......................... Flowcoating: Yes [ ] No [ ] Pig traps: Yes [ ] No [ ] Block valve stations: Yes [ ] No [ ] If yes, state number: .......................... Non-return valves and/or special fittings Yes [ ] No [ ] If yes, state type and number …………………… 2.1 Hydrotest water data Yes [ ] No [ ] Potable Water used for line-fill water Yes [ ] No [ ] Seawater used for line-fill water Yes [ ] No [ ] Are chemicals or a dye added to the line-fill water? If yes, state details: ........................ ........................................................................ ........................ ........................................................................ ........................ ........................................................................ 2.1/ Hazardous area classification 3 Do hazardous areas exist at precommissioning work Yes [ ] No [ ] sites? If yes, state the area classification: Zone................ ........................................................................ Zone................ ........................................................................ Project No.: MASTER




Section 2.2

2.4

Description Timing of the submission of the precommissioning plan To be in accordance with this Amendment to DEP?

Requirement / value

Yes [ ]

No [ ]

If no, specify the submission time of the plan in advance of the planned date of the first activity at the work site: Precommissioning records and reports Are more than three copies of the final report required?

Yes [ ]

If Yes, state the number of copies:

.............. copies

Is the submission date in accordance with this Amendment to DEP?

Yes [ ]

.................days No [ ]

No [ ]

.................days 3.

3.

4.2

4.3

A4.4

6.1

6.1

6.1

A6.1

If no, state working days: Gas detection devices & breathing apparatus Are gas detection devices required? If yes, state the number: Is breathing apparatus required? If yes, state the number: Maximum allowable noise level As specified in this Amendment to DEP? If no, specify the maximum allowable noise level as agreed: Filters, pumps and compressors Are filters of <50 micrometres required? If yes, specify size required Temporary pig traps Are temporary pig traps required? If yes, state number of pigs to be stored and length: Welding of temporary equipment As specified in this Amendment to DEP? If no, state welding specification to be used. Driving medium of dewatering operations Is compressed air the driving medium? If no, specify the medium: ........................................................................ ........................................................................ Dewatering pigs As specified in this Amendment to DEP? If no, state type: Dewatering with sleeping pigs Are sleeping pigs in the pipeline? If yes, state type and the number of pigs Purity of the fluid Is contamination of the fluid with chlorides acceptable?

Yes [ ] No [ ] ......................... Yes [ ] No [ ] ......................... Yes [ ] No [ ] .............. dB (A)

Yes [ ] No [ ] …………micrometres Yes [ ] No [ ] ....................pigs .......................m Yes [ ] No [ ] ………………… Yes [ ]

No [ ]

........................ ........................ Yes [ ] No [ ] ........................ Yes [ ] No [ ] ......................... Yes [ ]

No [ ]

Project No.: MASTER




Section A6.1

Description Duration of the post dewatering period To be in accordance with this Amendment to DEP? If no, specify the duration:

Requirement / value Yes [ ]

No [ ]

.................days 7.1

Final cleaning Is final cleaning required? If yes, state selected cleaning process and method: If water cleaning, state velocity: If air cleaning, state velocity: Drying Is drying required? If yes, state the drying process: Vacuum drying? Vacuum drying

8.1/ A8.1

8.3 8.3.1

8.3.7

9.1

General Is the evaporation/evacuation phase in combination with vacuum purging? If yes, state the medium: Dry air? Dry nitrogen? Are the dewpoint(s) in accordance with this Amendment to DEP? If no, specify the vacuum pressure required: Filling phase Is filling as specified in this Amendment to DEP? If no, specify the pressure: Conditioning by Inhibition Is inhibition required? If yes, state: Film thickness: Type of Inhibitor: Volume: Type of carrier medium: Volume:

Yes [ ] No [ ] ........................ ........................ High [ ] Low[ ] High [ ] Low[ ] Yes [ ]

No [ ]

Yes [ ] Yes [ ]

No [ ] No [ ]

Yes [ ]

No [ ]

Yes [ ] Yes [ ]

No [ ] No [ ]

............. mbar (abs)

Yes [ ] No [ ] ............. mbar (abs) Yes [ ]

No [ ]

.................. mm ........................ ................... m3 ........................ ................... m3

Project No.: MASTER




MASTER-30-99-23-0114-1

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