MASTER-30-99-00-0105-1

ENGINEERING SPECIFICATION

ES 30-99-00-0105

SEAMLESS LINE PIPE

2 April 07 SSE (M&W) SSpE(KG) HE(JD/FG) Revised in line with 43rd edition of API 5L

1 27/09/04 SSE (M&W) SSpE/HE (Bab) Issued as Unified Linepipe Specification for ADCO/ZADCO/ADMA-OPCO

REV. DATE ORIGINATOR REVIEWED (Custodian)

APPROVED (Forum Facilitator)

DESCRIPTION

THIS DOCUMENT IS INTENDED FOR USE BY ADCO AND ITS NOMINATED CONSULTANTS, CONTRACTORS, MANUFACTURERS AND SUPPLIERS.

ORIGINATOR: ENGINEERING SUPPORT DEPARTMENT

ADCO Doc. No. ES-30-99-00-0105-1 Project No. MASTER Pages 44

Project No.: MASTER

ADCO DOC. NO. 30-99-00-0105-1

REV. 2 DATE :April 2007

DOCUMENT TITLE:

SEAMLESS LINE PIPE

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INDEX

TABLE OF CONTENTS

I. INTRODUCTION 4 I.1 SCOPE 4

I.2 EXCLUSIONS 4

I.3 ABBREVIATIONS 4

I.4 DEFINITIONS 4

II. QUALITY ASSURANCE 5 II.1 QUALITY ASSURANCE SYSTEM 5

II.2 QUALITY PLAN 5

II.3 PRE-PRODUCTION MEETING 6

II.4 THIRD PARTY INSPECTION REQUIREMENTS 6

II.5 MEASURING AND TEST EQUIPMENT 6

III. TECHNICAL REQUIREMENTS (AMENDMENTS TO API 5L) 6 1. SCOPE 7

2. REFERENCES 8

3. DEFINITIONS 8

4. INFORMATION TO BE SUPPLIED BY PURCHASER 9

5. PROCESS OF MANUFACTURE AND MATERIAL 9

6. MATERIAL REQUIREMENTS 11

7. DIMENSIONS, WEIGHTS, LENGTHS, DEFECTS AND FINISHES 17

9. INSPECTION AND TESTING 19

10. MARKING 25

11. COATING AND PROTECTION 26

12. DOCUMENTS 26

14. HANDLING AND STORAGE – NEW SECTION 28

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FIGURE 9.3.6 : HARDNESS SURVEYS – LOCATION OF IMPRESSIONS 28 APPENDIX F: SUPPLEMENTARY REQUIREMENTS 29 ADDENDUM 1: MANUFACTURING PROCEDURE SPECIFICATION (MPS) 31 ADDENDUM 2: MANUFACTURING PROCEDURE QUALIFICATION (MPQ) 32 ADDENDUM 3: FULL RING TEST FOR SULPHIDE STRESS 35 CRACKING ( CAPCIS ).

ADDENDUM 4: PIPE FOR BENDING OR HEAT TREATMENT 36 ADDENDUM 5: LINE PIPE DATA SHEET – SEAMLESS PIPES 36 ADDENDUM 6: REFERENCED CODES, STANDARDS &

TECHNICAL DOCUMENTS. 38 ADDENDUM 7: ABBREVIATIONS 39

ADDENDUM 8: DEFINITIONS 40 ADDENDUM 9: SUMMARY OF TESTING AND INSPECTION 41 ADDENDUM 10: TPI REQUIREMENTS FOR 3.1.C CERTIFICATION 43

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I INTRODUCTION

I.1 Scope

This Specification, together with its attachments, defines the minimum requirements for the materials, manufacture, testing and inspection of seamless line pipe for pipeline projects in sour service. This Specification must be read in conjunction with API SPEC 5L (Forty Third Edition) which forms an integral part of this Specification, throughout Part III (Technical Requirements) which consists of modifications and additions to API SPEC 5L. All clauses of API SPEC 5L not so modified are requirements of this Specification.

I.2 Exclusions This Specification does not include SAW line pipe or electric resistance welded line pipes which are covered in other specifications.

I.3 Abbreviations

The abbreviations used in this Specification are listed in Addendum 7.

I.4 Definitions

I.4.1 General Definitions

Throughout this Specification, the words ‘will’, ‘may’, ‘should’ and ‘shall’, when used in the context of actions by the Company or others, have specific meanings as follows:

a. ‘Will’ is used normally in connection with an action by the Company and / or nominated representative rather than by a Contractor or Vendor.

b. ‘May’ is used where alternatives are equally acceptable.

c. ‘Should’ is used where provision is preferred.

d. ‘Shall’ is used where a provision is mandatory.

I.4.2 Specific definitions

a. The Contractor is the party which carries out all or part of the design, engineering, procurement, construction, commissioning of a project. The Company may undertake all or part of the duties of the contractor.

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b. The Manufacturer/Supplier is the party which manufactures or supplies equipment and services to perform the duties specified by the contractor.Company is the party which initiates the project and ultimately pays for its design and construction. The Company will generally specify the technical requirements. In this specification “Company” would mean ADCO.

Other specific definitions are covered in addendum 8 of this specification.

II. QUALITY ASSURANCE

II.1 Quality Management System

The manufacturer shall operate a Quality Management System (QMS) within his organisation, which ensures that the requirements of this Specification are fully achieved. The manufacturer's quality management system shall be based on the latest issue of ISO 9001 (or an equivalent) and accredited by a reputable certifying agency. The manufacturer's quality manual shall provide details for the preparation of a quality plan, which shall include provisions for the QA/QC of all raw materials, pipe manufacture, testing and final inspection. Where an approved Manufacturer revises their Quality Management system that effect any changes to Company approved Quality plan / Inspection & test plan, then the revised Quality plan / Inspection & test plan shall be submitted for Company approval before initiating any manufacturing process. The effectiveness of this quality system may be subject to monitoring by the Company or its representative and, may be audited following an agreed period of notice.

The manufacturer shall maintain sufficient Inspection and Quality Assurance staff, independent of his production management, to ensure that the Quality plan is correctly implemented and that all related documentation is available.

II.2 Quality Plan

The successful bidder shall submit project specific Quality Plan as well as Inspection and Test Plan (ITP) to the Company within one week after the award of Purchase Order. Evidence shall be included in the plan to prove that the quality section is independent of production management.

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Line pipe manufacturer shall also submit the mills operating procedures such as the Manufacturing Procedure Specification (MPS), Inspection, NDT, Hydrostatic testing, Handling, Storage etc for review by the Company. The documents submitted shall be reviewed by the Company and any queries resolved during pre-production meetings.

For the first order of each grade and / or size of seamless line pipe, the manufacturer shall submit a Manufacturing Procedure Specification (MPS) along with his offer for review / approval by the Company. This MPS shall be in accordance with Addendum 1. For subsequent order / supply of the same line pipe as indicated above, reference shall be made to the previously approved MPS as an alternative to submitting the document with the offer.

II.3 Pre-Production Meeting

Pre-production meetings shall be held between the Company and/or its representatives and the manufacturer, to clarify and resolve any technical issues. The first pre-production meeting shall be conducted within 14 days after the award of Purchase Order.

II.4 Third Party Inspection Requirements

The third party inspection requirements shall be as stated in the attached Addendum 10.

II.5 Measuring and Test Equipment

The accuracy of all measuring and test equipment shall be periodically verified and recorded as per manufacturer's quality management system and demonstrated to the Company or its representative throughout manufacturing.

III. TECHNICAL REQUIREMENTS (AMENDMENTS TO API 5L)

The technical requirements stipulated in this Specification for Line Pipe Materials are based on API SPEC 5L (Forty Third Edition). The numbering of the following items corresponds to the paragraph numbering in API SPEC 5L and reflects additions, modifications, and decisions by the Company indicated in the heading. All provisions of API SPEC 5L that are not revised remain in force.

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1. SCOPE 1.1 Purpose and Coverage

1.1 Modification:

The scope of this Specification covers only seamless line pipe for sour service conditions.

1.2 Product Specification Level (PSL)

1.2 Modification:

Where not otherwise modified by this Specification, PSL2 requirements shall apply.

1.3 Grades

1.3 Modification:

Replace the first paragraph by: This Specification covers grades up to and including grade X65. (SMYS = 65,000 psi, 448 MPa). Replace the last paragraph by: Higher grade pipe shall not be substituted for pipe ordered to a lower grade without the Company approval, irrespective of strength level.

1.5 Units

1.5 Decision:

Metric units shall apply.

Add new section: 1.6 COMPLIANCE

This specification adopts sampling as a method to determine batch compliance. Nevertheless the manufacturer is responsible to ensure and certify that all pipes meet the requirements of this specification.

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2. REFERENCES

2.1 Modification:

Where referred in this Specification the codes, standards and technical documents listed in Addendum 6 shall to the extent specified herein represent part of this Specification. Unless otherwise specifically indicated in writing by the Company, the Supplier shall work in accordance with the requirements specified herein and the applicable requirements of the latest editions of the referenced Codes, Standards and Technical Documents, whenever indicated in this Specification.

The requirements of this Specification shall take precedence over the referenced Codes, Standards and Technical Documents. Where this Specification states no overriding requirements, the referenced Codes, Standards and Technical Documents shall apply in full.

2.3 Modification:

Standard documents equivalent to those referred to herein shall not be substituted without written approval from the Company. Approval of equivalent Standard documents will not, in any way, remove responsibility from the Supplier to meet the requirements of the Standard documents referred to and amended herein, in the event of conflict.

The Supplier shall equip himself with copies of all the referenced Codes, Standards and Technical Documents referred in Addendum 6 of this Specification and shall make them readily available to all the Company, or nominated representative, personnel involved in the work.

3. DEFINITIONS

3.20 New Subsection:

The term “Purchaser” shall refer to the Company (ADCO) or its nominated representative.

3.21 New Subsection:

The definitions applicable to this Specification are contained in Addendum 8.

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4. INFORMATION TO BE SUPPLIED BY THE PURCHASER

4.2 Modification:

Purchaser information is contained in the Line Pipe Data Sheet (Addendum 5) or stated in the Purchase Order.

5. PROCESS OF MANUFACTURE AND MATERIAL 5.1 Process of Manufacture

5.1 Modification:

The steel shall be fully killed and manufactured by the electric furnace or basic oxygen process, and made to fine grain, low hydrogen and clean steel practice with a grain size of ASTM 7 or finer as defined in ASTM E 112. For quenched and tempered pipe, this grain size requirement shall not apply. The steel shall be vacuum degassed while molten and calcium treated for inclusion shape control to increase resistance to hydrogen-induced (blistering and stepwise) cracking (HIC). Note: Alternative processes in lieu of vacuum degassing may be acceptable provided the mill had adequate proven track record of past orders of sour service pipes similar to this specification. In this case, histograms of typical and maximum levels of nitrogen, oxygen and hydrogen obtained in the past orders along with details of test results of HIC, Charpy impact tests and SSC tests along with a full list of past orders delivered to a similar specification shall be submitted to Company for disposition. Seamless pipe shall be manufactured from continuously cast or ingot steel. Change of steel making sub-contractor shall necessitate repetition of first-day production testing.

The supplier shall provide the Company at the bid stage with a technical specification giving full details of all the characteristics of the proposed steel, the steel making process, castings, the pipe manufacturing process and the inspection procedures. The supplier's specification shall include as a minimum the information listed below concerning the steel making process:-

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a. Name of billet/plate manufacturer and mill.

b. Steel Making process including description of desulphurization technique (s), inclusion shape control, methods of monitoring shape control and de-oxidation practice.

c. Aim chemical composition, minimum and maximum working limits

(ladle and check) of chemical composition of base steel.

d. Delivery condition of pipe base steel (heat treatment), typical metallurgical microstructure.

e. Name of pipe manufacturing mill.

f. Pipe manufacturing procedure including details of temperature and

reduction of rolling and inspection procedures.

g. Suitability of material for field welding and weldability tests specification.

h. Previous test data on HIC and SSC from pipe body. i. Histograms of past performance showing chemical and mechanical

properties shall also be supplied as proof of capability to produce pipes according to this specification.

j. At supplier's option, any other technical information related to the

proposed pipe supply.

5.1.1 Modification:

The total strain associated with cold sizing and straightening shall not exceed 3% (as qualified by the tests in Addendum 2).

5.4 Heat Treatment

5.4 Modification:

All grade X60 and X65 line pipes supplied conforming to this Specification shall be in quenched and tempered condition. Pipes of lower grades shall be supplied either normalised or normalizing formed or quench & tempered.

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Note: Normalizing forming is a forming process in which the final deformation is carried out in a certain temperature range leading to a material condition equivalent to that obtained after normalizing. When normalizing forming is chosen, the finishing temperature shall be greater than 780 degrees C. Pipes finished at a lower temperature than 780 degrees C shall be subjected to a further normalizing heat treatment with a minimum holding time of thirty minutes..

5.7 Manufacturing Procedure Specification And Qualification - New

Subsection: The Manufacturer shall submit a Manufacturing Procedure Specification (MPS) for each product and manufacturing route. The minimum required contents of the MPS are listed in Addendum 1. The Manufacturing Procedure Specification shall be qualified by the Manufacturing Procedure Qualification (MPQ) testing, as detailed in Addendum 2. Qualification of the manufacturing processes shall be determined from the results of the first-day production tests. The Company may require that qualification be undertaken on a limited production quantity before allowing unrestricted production. No change may be made to a successfully approved and qualified Manufacturing Procedure Specification without the approval of the Company. The manufacturer shall submit the revised MPS and as part of the approval process, unless otherwise agreed by the Company, any change to the MPS shall require re-qualification.

5.8 Internal Surface Condition - New Subsection: The internal surfaces of the line pipe shall be made free from mill scale after quenching and tempering.

6. MATERIAL REQUIREMENTS

6.1 Chemical Composition

6.1.1 Modification:

The contractual limits on heat and product analysis shall be those defined in the Manufacturing Procedure Specification and agreed by the Company following qualification. They shall not, however exceed the limits stated in Table 6.1.1.

Delete Table 2B and substitute the following:

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Table 6.1.1: Chemical Composition

Element Maximum

permitted alloy content, wt %

Maximum variation on agreed composition

(see 9.2. 2.3)

Notes

Carbon (C) 0.16 0.03 1 Manganese (Mn)

1.40 0.30

Silicon (Si) 0.40. 0.25 Aluminium (Al) – Total

0.06. 0.03 2

Phosphorus (P)

0.015.

Sulphur (S) 0.008. Niobium (Nb) 0.05 0.02 3 Vanadium (V) 0.08. 0.02 3 Nickel (Ni) 0.30 0.10 5 Chromium (Cr) 0.30 0.05 5 Copper (Cu) 0.35. 0.10 5 Molybdenum (Mo)

0.10 0.05 4 & 5

Titanium (Ti) 0.04. 0.02 3 Nitrogen 0.012 Boron (B) 0.0005 Calcium (Ca) 0.006 6 Any other element

By agreement with the Company

7

Note 1: For quenched & tempered pipes, Carbon content shall be 0.12% maximum Note 2: Total Aluminium to Nitrogen ratio, Al/N, shall be at least 2:1 Note 3: The total percentage of Nb + V +Ti shall be a maximum of 0.15% Note 4: Molybdenum may be increased to 0.25% maximum for X65 grade only. Note 5: The total percentage of Cr+ Mo+ Ni+ Cu shall not exceed 0.60%. Note 6: The Ca/S ratio shall be > 1.0 for Sulphur content above 0.0015% Note 7: Total oxygen analysis shall be required for checking the effectiveness of de-

oxidation process. Oxygen content shall not exceed 0.0040%.

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6.1.2 Modification:

Delete paragraph (a) and substitute: For Grade B pipe, only C, Mn, Si, S and P levels shall be determined. For higher grades, analysis for other elements in the table shall also be performed. The intentional addition of elements not specified in Table 6.1.1 above shall not be permitted without prior written approval from the Company. For pipe grades other than Grade B, the elements listed in Table 6.1.2, below, shall be determined for the first three heats (on product) and shall not exceed the limits indicated in this table.

Table 6.1.2: Other Elements

Element Product Analysis (Weight %) Tin (Sn) 0.015 Antimony (Sb) 0.010 Bismuth (Bi) 0.005 Lead (Pb) 0.005 Arsenic (As) 0.020

Should the above analysis from the first three heats be below the maxima for all elements, the frequency of analysis for these elements may be reduced to one in ten heats.

6.1.3.2 Modification: CE (Pcm) < 0.22

CE (IIW) < 0.41

6.2 Mechanical Properties

6.2.1 Modification:

For steel grades X46 and higher, the maximum longitudinal and transverse yield strength shall not exceed the specified minimum yield strength by more than 120 MPa. The Yield Strength to Ultimate Tensile Strength ratio of line pipe material shall not exceed 0.90. For longitudinal tests using unflattened, full wall thickness test pieces, the ratio may be increased to a maximum of 0.93.

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The required minimum tensile elongation shall be determined according to the formula given in foot note (a) of Table 3B but shall be not less than 20%.

6.2.5 Fracture Toughness Tests – Modification:

6.2.5.2 For all pipe grades, Charpy V-notch impact tests shall be performed on each test ring taken for tensile testing and tested in accordance with Appendix “F”, section SR5.

Impact testing shall be carried out using 10 x 10, 10 x 7.5 or 10 x 5 mm cross section specimens. The largest possible specimen shall be used. Where the nominal pipe dimensions are insufficient to extract a 10 x 5 mm specimen, impact testing is not required.

For pipes of DN 250 ( NPS 10 inch) or less, impact test specimens shall be taken parallel to the axis of the pipe (i.e. longitudinal specimens shall be taken).

For pipes greater than DN 250 (NPS 10 inch), impact test specimens shall be taken transverse to the axis of the pipe, except where the wall thickness prevents extraction of a 10 x 5 mm specimen. In this case, longitudinal specimens shall be taken. The impact testing temperature shall be as follows:

Table 6.2.5A: Charpy V – notch test temperatures To °C as a

function of Tmin °C (Minimum Design Temperature)

Specified wall Thickness (mm)

Test temperature (degrees C)

t ≤ 20 T0=Tmin-10

20 < t ≤ 30 T0=Tmin-20

t > 30 T0 = Tmin-30

Impact Energy Requirements For pipe for use in liquid conveying pipelines, the minimum absorbed energy requirements for full size (10 x 10) specimens taken transverse to the pipe axis are given in the table 6.2.5.B below.

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Table 6.2.5.B: Charpy V-notch energy requirements GRADE MINIMUM AVERAGE

VALUE (J) MINIMUM INDIVIDUAL

VALUE (J) B 27 22

X42 30 24X46 32 26X52 36 30X56 39 33X60 42 35X65 45 38

For other specimen sizes and orientations, the values above shall be multiplied by the following factors:

Size Orientation Factor

10x10 10x7.5 10x7.5 10x5 10x5

Longitudinal Transverse Longitudinal Transverse Longitudinal

1.5 0.75 1.125 0.5 0.75

The shear area at the fracture surface of the test specimens shall be recorded. Each sample shall exhibit not less than 50% fibrous shear.

For pipe for use in dry, lean natural gas pipelines with a maximum allowable operating pressure of 80 bar or less, the Charpy impact energy shall meet the requirements of Table 6.2.5B above, except that for pipe grades below X60, the minimum average and individual minimum values shall be 40 Joules and 30 Joules respectively. The test temperature shall be determined from Table 6.2.5 A above.

Pipelines conveying the following fluids may have a higher Charpy impact energy requirement than specified above:

- rich gas

- multiphase fluid

- lean natural gas at pressures greater than 80 bar.

In these cases, the Charpy impact energy required to arrest a running ductile fracture and the test temperature should be determined by the Principal and advised to the pipe manufacturer.

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6.2.7 Drop weight tear tests (DWTT) Drop weight tear tests (DWTT) are required for pipelines with a pipe diameter of DN 400 (16 inch) or greater designed for multi phase sour fluids and gas service. Testing shall be in accordance with Appendix F, section SR6. The test temperature shall be 0°C, or 10°C below the minimum design temperature (whichever is lower) and the required minimum individual shear area shall be 85%.

6.2.8 Hardness Survey - New Clause:

Three specimens from one pipe shall be extracted from locations 120 degrees apart from a position chosen by the Purchaser, polished and etched for examination and checked for microstructure. A Vickers hardness survey at 10 kg load (HV10) shall be made on one of the above specimens selected by the Purchaser. Three traverses shall be made as shown in Figure 9.3.6. A minimum of twelve readings shall be taken at 5 mm intervals. The maximum hardness anywhere in the pipe body shall not exceed 230 HV10..

6.2.9 Hydrogen Induced Cracking Tests - New Clause:

Hydrogen Induced Cracking (HIC) tests shall be conducted as per NACE Standard TM0284 in solution “A”. The acceptance levels for HIC tests performed shall be: CSR = 2 % max CLR = 15 % max CTR = 5 % max

7. DIMENSIONS, WEIGHTS, LENGTHS, DEFECTS AND END FINISHES

7.2 Diameter

7.2 Modification: Pipe body

The outside diameter of the pipe body shall not vary by more than +/- 0.75% of the specified outside diameter in metric Table E-6C of API 5L or 3 mm whichever is lower.

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Pipe ends

The internal diameter within 100mm of each pipe end shall be ± 0.5 mm or ± 0.5 % of internal diameter (whichever is greater) but maximum + 1.6 mm, -0.8 mm.

Nominal I.D. = Nominal O.D. – 2 x Nominal W.T. The internal diameter shall be measured by internal callipers or a

measuring tape inside the pipe. The method and equipment shall be approved by the Company. While using internal callipers, measurement shall be made at three positions, equally spaced around the pipe. For pipe of DN200 (NPS 8 inch) and below, the internal diameter may be calculated by measuring the outside diameter with a circumference tape and subtracting twice the actual wall thickness from this value. Out of Roundness

The pipe end out-of-roundness tolerance shall not exceed 1% or 5 mm,

whichever is smaller. The tolerance shall be applied to the inside diameter.

7.3 Wall Thickness - Modification:

The wall thickness at any point shall not deviate by more than -10% or + 15% of the specified nominal wall thickness.

7.5 Length - Modification:

A minimum of 95% of pipes shall be between 11 and 12.2 metre in length. No pipe shall be less than 8 metre in length. No pipe shall be greater than 12.5 metre in length.

7.6 Straightness - Modification:

The deviation from a straight line shall not exceed 1.5 mm per meter of pipe length with a maximum deviation of 15mm per pipe length.

7.7 Jointers - Modification:

Jointers are not permitted.

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7.8 Workmanship And Defects 7.8.1 Dents - Modification:

Deviations from the original contour of the pipe shall not exceed 4mm in depth and shall not extend in any direction more than 1/3 of the pipe diameter. All cold formed dents with a sharp bottom gouge and all sharp gouges (without dents) deeper than 1.0 mm shall be considered defects requiring rectification or rejection. Gouges may be removed by grinding provided the wall thickness is not reduced below the specified minimum.

7.8.8 Hard Spots – Modification

Delete the first sentence and replace with: Any hard spot with a hardness greater than 22 HRC (248 HV10) shall be rejected.

7.8.9 Cracks, sweats and leaks-Addition:

The location of all cracks, sweats and leaks shall be clearly marked and the pipe length set aside for investigation by the inspector.

7.8.10 Laminations – Delete and Substitute:

Surface breaking laminations are not permitted on the machined bevel surfaces of pipes. Any surface tears and slivers on the body of the pipe having a depth of more than 5% of the nominal wall thickness shall be removed by grinding (provided the wall thickness is not reduced below the specified minimum).

7.8.14 Other defects - Modification:

All surface imperfections not described by the previous subsections

and clauses of the Specification shall be considered defects if they exceed the following depth:

Sharp - bottomed imperfections: 0.5mm Other imperfections : 5% of nominal wall thickness.

7.9 Pipe Ends

7.9.3 Plain Ends - Addition:

The pipe ends shall be cut square to the longitudinal axis within 1.6mm across any diameter.

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No repairs are permitted on the machined bevel ends.

Pipe shall be delivered with pipe bevel protectors with close ends allowing handling with hooks. However, open end bevel protectors may be acceptable for OD 168.3 mm and over.

The type of end protectors proposed shall be submitted to the Company for approval at the tender stage. Bevel protectors shall be re-usable type.

9. INSPECTION AND TESTING

Add a new section:

9.2.2.3 Product Analysis Variation The Manufacturer shall propose a nominal product analysis in the manufacturing procedure specification (MPS). The range of acceptable variations in the product analysis is given in Table 6.1.1. This shall be applied to the chemical composition proposed by the Manufacturer in the manufacturing specification. The maximum variation on agreed composition is allowed provided that the final maximum alloy content given in Table 6.1.1 is not exceeded.

9.3 Testing Of Mechanical Properties

9.3 Addition:

For all mechanical tests an inspection lot shall consist of 50 pipes or all pipes of one heat, heat treatment batch, diameter and wall thickness, whichever is the less.

9.3.1.1 Tensile test specimens - Addition:

Tensile properties shall be determined from specimens removed from pipe which has been subjected to all mechanical and heat treatment operations. Where stress relieving of pipe will be performed, e.g. for field welding, additional tensile testing of parent metal and weldments shall be performed on stress relieved specimens. The Purchaser shall specify on the purchase order if this condition applies (see Addendum 5). The testing procedure shall be in accordance with ASTM A 370. Tensile test specimen orientation shall be as shown in Figure 3.

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9.3.1.2 Tensile testing frequency For pipe diameters below 200 NB (8 inch NPS), two longitudinal tensile tests shall be required per inspection lot. For pipes of diameter 200 NB (8 inch NPS) and above, one longitudinal tensile test and one transverse tensile test shall be taken from the pipe body at a frequency of one per inspection lot. Longitudinal tensile test specimens shall be either non-flattened rectangular or round bar specimens. Transverse tensile properties shall be determined on flattened rectangular specimens.

9.3.5.1 Charpy test specimens - Modification:

Impact test specimens shall be taken from the pipe body at a frequency of two tests per inspection lot. Each test shall consist of three specimens taken at mid wall thickness.

9.3.6 Hardness Survey - New Clause:

A hardness survey shall be carried out, at a frequency of two per inspection lot, i.e. sections will be taken from both ends of the selected test pipe. The examination and survey shall be performed on the full section of pipe prepared to, at least, a 600 micron finish.

The hardness survey is to be carried out by Vickers hardness test at 10Kg load. The position of the impressions is given in Fig. 9.3.6 of this Specification. The maximum hardness value anywhere in the pipe body shall not exceed 230 HV10.

9.3.7 HIC Testing - New Clause:

Hydrogen induced cracking tests shall be conducted on one pipe from each of the first three heats and subsequently at a frequency of one set per ten heats of steel produced. The number, size, orientation, preparation and cleaning of each set of specimens shall conform to Section 4 of NACE Standard TM0284. HIC testing shall be carried out using solution “A”

9.4 Hydrostatic Tests

9.4.1 Hydrostatic Test Requirements – Modification

Hydrostatic testing shall be performed after cold expansion. The test pressure shall be held for a minimum of 10 seconds for all pipe sizes.

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9.4.3 Test Pressures - Modification:

The test pressure for all sizes of pipe shall be such that the hoop stress calculated on the basis of the minimum specified wall thickness and including stresses from end loading is at least 95% of the specified minimum yield strength. If applied, the end load compensation factor as determined by the formula given in (Appendix F, Section SR14) shall be used.

9.7 Visual Inspection Add the following: The full body of every pipe shall be visually examined, internally and externally, for surface defects.

9.8 Non - Destructive Inspection

9.8.1 Qualification of Non-destructive Inspection Personnel - New

Clause: All personnel performing NDT activities shall be qualified in the technique applied, in accordance with SNT-TC-1A or ISO 9712 or equivalent, subject to review and acceptance of the examination and training records by the Company For UT at least one level III qualified inspector shall be available to the mill (on call) for overall supervision. A level II inspector is required for shift supervision and calibration of all systems (both manual and automated). A level I inspector is acceptable for all other NDT methods. A level II inspector is acceptable for supervision of all other NDT methods

9.8.2 Addition

All NDT shall be performed in accordance with written procedures. These procedures shall have the prior approval of the Company. NDT for acceptance of the pipe (final inspection) shall take place after all heat treating and expansion operations. It may, however, take place before cropping, bevelling and end sizing.

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9.8.3 Methods of Inspection - Modification:

All pipes shall be subject to the following ultrasonic inspection:

a) Inspection for longitudinal imperfections as per ISO 9303 b) Inspection for transverse imperfections as per ISO 9305 c) Wall thickness measurement as per ISO 10543 d) Inspection for laminar imperfections in the pipe body as per ISO

10124 e) Inspection for laminar imperfections in the pipe ends as per ISO

11496

The following requirements shall apply for seamless pipes:

a) Ultrasonic thickness testing of the pipe body and ends of seamless

pipe shall be performed by scanning along a helical or straight pattern in such a way that at least 25% of the pipe surface is covered.

b) The body and ends of all seamless pipes shall be 100% ultrasonically tested for inside and outside surface defects as well as transverse and longitudinal defects.

c) Ultrasonic lamination testing of each seamless pipe body shall be performed using a helical pattern with at least 25% scanning coverage of the pipe surface.

9.8.5.1 Ultrasonic Equipment - Addition

The automatic ultrasonic equipment shall incorporate: 1. A device which monitors the effectiveness of the coupling.

In the case where a zero degree compression wave probe is used to monitor coupling, loss of coupling exists when the sensitivity (echo height) decreases by more than 10 dB relative to the static calibration. A clear acoustic warning system and an automatic paint spray system (or equivalent) shall be activated when loss of coupling occurs.

2. An automatic paint-spraying device, or equivalent system, which is activated when the received ultrasonic echo exceeds the preset acceptance limit. This alarm shall operate without any interference of the ultrasonic operator and shall be applied within 25 mm advancement past the detected defect. The reset time of the alarm system, after detection of a defect, to be again available for detection, shall be shorter than the time needed for 25 mm advancement in the scanning direction.

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9.8.5.2 UT Reference Standards - Addition The reference standard shall include at least one transverse and one longitudinal notch on both the internal and external surfaces for detection of surface defects and defects in pipe body and ends. The notch depth, in all cases, shall be 5% of the nominal wall thickness.

For lamination detection, flat bottomed hole with 6 mm diameter and drilled to the mid-wall position shall be used. The reference (calibration) standard shall have the same specified diameter and thickness as the product being inspected and shall be of sufficient length to permit calibration of ultrasonic inspection equipment at the speed to be used in production. The reference standard shall also be of the same material type and have the same surface finish and heat treatment as the product to be inspected. It shall be free from discontinuities or other conditions producing indications that may interfere with detection of the reference reflectors. For ultrasonic testing of longitudinal imperfections, the probe angle shall be 45 +/- 3 degrees. Full coverage shall be achieved at the examination sensitivity level under all scanning speeds. All sensitivity adjustments shall be carried out dynamically.

9.8.5.2.1 Automatic Ultrasonic Inspection Procedure - New Clause:

The Manufacturer shall demonstrate the effectiveness of the non-destructive testing procedures to the satisfaction of the Company. In the case of automatic ultrasonic inspection this shall require the operation of the equipment at production scanning speed and recording of the appropriate response level from the discontinuities in the calibration standard or similar test piece. All sensitivity adjustments shall be carried out dynamically.

9.8.5.4 UT Acceptance Limits - Modification

The acceptance level for longitudinal and transverse imperfections shall be L2/C of Table 1 & 2 of ISO 9303 and ISO 9305 respectively. Any signal greater than that received from the reference standard shall be considered a defect.

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The following modified acceptance criteria apply for laminar imperfections:

Table 9.8.5.4: Acceptance Criteria for laminar Imperfections

Zone

Maximum Permitted Imperfection (mm)

Minimum Imperfection Size Considered (mm)

Maximum population Density (Note 1)

Pipe Body Area 500 mm2

Area 150 mm2 Length 15mm Width 8mm

5 within reference area of 500mm x 500mm

Pipe End

Area 100 mm2 Width 6mm

Length 6mm 3 per length of 1000 mm

Note 1: The population density shall be the number of imperfections

smaller than the maximum permitted size and larger than the minimum imperfection size considered.

Note 2: Two or more imperfections shall be considered one imperfection if they are separated by less than the largest dimension of the smallest imperfection.

Note 3: The width of an imperfection is the dimension transverse to the longitudinal axis of the pipe.

9.8.5.7 Pipe Ends - New Sub-clause

After bevelling, the complete circumference of the pipe end shall be tested ultrasonically from the inside for laminations (this inspection shall cover a width of 100 mm). Alternatively the pipe may be tested from the outside prior to bevelling, in which case a band of at least 25 mm wide, to include the eventual bevelled area, shall be tested.

If UT has not been performed from the outside before cutting and if UT from the inside is not feasible because of dimensional limitations, then MT shall be applied to the bevel face in accordance with Section 9.7.5

For pipes previously subjected to 100% rotary ultrasonic inspection, the above requirements shall not apply.'

Laminations are not acceptable in this area.

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9.8.6.3 Magnetic Particle Inspection Reference Standard - Addition Add to existing section: Where Magnetic Particle Inspection is required by this specification, the same shall be performed in accordance with the requirements of ASTM E 709. Prior to the inspection, the surface to be examined and all adjacent areas within 25 mm shall be dry and free of all dirt, grease, lint, scale, welding flux and spatter, oil or other extraneous matter that could interfere with the examination.

9.8.6.5 MPI of pipe ends - New Sub-clause:

Where the pipe ends were not previously inspected by automated UT or manual UT, all finished weld bevels shall be examined by wet magnetic particle inspection. The method of magnetisation shall be approved by the Company. Any lamination on the weld bevel shall be considered a defect. Magnetic particle examination using current flow (prod) techniques shall not be used.

9.8.7 Residual Magnetism Measurement Requirements - Modification:

The residual magnetism in the finished pipes shall be checked by measurement of the magnetic flux density. Measurements shall be made immediately adjacent to both machined bevel ends of the pipe. The magnetic flux density shall not exceed 25 gauss when measured with a Hall-effect gauss meter, or equivalent values with other types of instruments.

9. 9a Disposition of Defects Add to existing clause: In all cases where grinding repairs are made as a result of imperfections being disclosed by NDT, the part of the pipe containing such repairs shall be subjected to additional NDT using the same technique, and MT, after the grinding operation.

9.9b Disposition of defects - Modification:

Weld repairs are not permitted on either the pipe end or body.

10. MARKING 10.1 Marking-General – Addition

For pipes DN100 and above, stencil markings required by this specification, shall be executed in white block capitals of minimum height 25 mm. For smaller pipe diameters, stencil marking height shall be a minimum 10 mm Marking of test pressures, size (diameter and wall thickness) and weight shall be in metric units.

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10.2 Location of Markings - Modification:

Delete the existing section and replace with the following: Unless specified otherwise on the purchase order, marking shall be located as follows: For pipe diameters DN450 (NPS18) and larger, all paint markings shall be on the inside surface. For smaller pipe diameters, the paint marking shall be on the outside surface.

10.3 Sequence of Marking - Modification / Addition: a. External markings and labelling shall include but not limited to the

following:

a1. ADCO a2. Purchase Order and Purchases Order item no. a3. Length

b. Internal marking shall include

b1. Heat Number b2. Unique pipe identification No.

11. Coating and Protection 11.1 Coating

Delete existing section and replace with the following:

Unless otherwise stated on the purchase order, pipe shall not be coated. Protective coating or varnishing of the pipe identity markings is, however, permitted.

12. DOCUMENTS

12.1 Modification:

The Manufacturer shall supply the Company with lists of pipe produced stating pipe identification numbers, heat numbers, dimensions, weights of lots of pipes or individual pipe lengths, purchase order numbers, type of certificates issued, and any further items that may be indicated on the purchase order. Documentation requirements shall be as defined by this Specification and as detailed in the Purchase Order. Material Certificate, Pipe Mill Tally Sheet, Inspection Certificate and Purchaser Inspection Release Certificate shall be submitted to and approved by the Company before shipment.

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Vendor data book / manual compiling all relevant data, documents test results, qualification; certificates in required number of bound volumes shall be submitted. Electronic file containing pipe manufacturing history shall be submitted on a CD-ROM in standard commercial software such as MS-Excel etc, pipe traceability and tracking.

12.3 Material and Test Certificates Requirements – New Subsection:

Unless agreed otherwise by the Company, pipe manufacturer shall provide material and test certification in accordance with the Company’s specification and ISO 10474 (or BSEN 10204 Type 3.2) type 3.1.C certification. However, for API 5L grade B pipe, type 3.1 B certification with TPI endorsement is acceptable with prior agreement /approval by the Company.

12.4 Records and Test Reports – New Subsection

The following records and test reports shall be submitted to the Company in an electronic format (3 sets of CD-ROM) in addition to hard copies as part of the deliverables at the time of pipe delivery at no cost to the Company. • Heat treatment records when any pipe is subject to heat treatment.

• Certified chemical analysis and mechanical properties tests.

• A report giving the results of the grain size evaluation.

• Charpy V-notch impact tests, DWTT and hardness tests results. • Histograms of chemical analysis of each element, IIW carbon

equivalent and Pcm for the supplied pipes for each pipe grade and size. • Histograms of mechanical properties (tensile, yield, yield/tensile ratio,

Charpy tests, hardness) for the supplied pipes for each pipe grade and size.

• Hydrogen induced cracking sensitivity test results and photographs.

• Results of SSC tests, full ring CAPCIS tests and weldability tests.

• Results of non-destructive tests

• Results of hydrostatic tests

• Approved Inspection & test plan (ITP), manufacturing procedure specifications (MPS) & procedures for heat treatment, NDE, pipe traceability & identification and welding procedure for weldability test.

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14. HANDLING AND STORAGE - NEW SECTION

Packing, protection, preservation, identification, storage & handling of line pipe shall as a minimum meet the requirements stipulated by this Specification All pipes shall be handled, loaded and shipped in accordance with API RP 5L1, Recommended Practice for Railroad Transportation of Line Pipe and API RP 5LW, Recommended Practice for Transportation of Line Pipe on Barges and Marine Vessels. The CONTRACTOR shall submit loading instructions and diagrams for approval for all pipe shipped by truck, rail, or marine, vessel, however approval of these shall not relieve the CONTRACTOR of his responsibility for any damage during shipment. All dimensional tolerance and pipe surface conditions specified herein and in API 5L shall apply to the pipe condition as received by the Company at the shipping destination.

FIGURE 9.3.6: HARDNESS SURVEYS - LOCATION OF IMPRESSIONS

1.5 + 0.5mm external surface

Mid Thickness

Internal surface 1mm + 0.5mm

Pipe Axis

Horizontal separation of impressions to be 5 mm

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APPENDIX F - SUPPLEMENTARY REQUIREMENTS

SUPPLEMENTARY REQUIREMENT SR5

SR5.1 Delete this section and replace with the following: The fracture toughness of the pipes shall be determined by Charpy V-notch impact testing in accordance with ASTM A 370. The impact test temperature shall be as specified in section 6.2.6 of this specification. A full Charpy V-notch transition curve shall be established on one pipe for the first day production tests.

SR5.4 Delete existing section and replace with the following:

Impact testing shall be carried out using 10x10, 10 x 7.5 or 10 x 5 mm cross section specimens. The largest possible specimen shall be used. Where the nominal pipe dimensions are insufficient to extract a 10 x 5mm specimen, impact testing is not required.

For pipes of DN 250 (10 inch) or less, impact test specimens shall be taken parallel to the axis of the pipe (i.e. longitudinal specimens shall be taken).

For pipes greater than DN 250 (10 inch), impact test specimens shall be taken transverse to the axis of the pipe, except where the wall thickness prevents extraction of a 10x5 mm specimen, in which case longitudinal specimens shall be taken.

SR5B.2 Delete existing section and replace with the following: One set of three specimens shall be taken from the mid-thickness location in the pipe wall.

SR5B.3


The minimum absorbed energy requirements are given in section 6.2.6 of this specification.

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SUPPLEMENTARY REQUIREMENT SR6 – DROP WEIGHT TEAR TESTING

SR6.1


Drop weight tear tests are required on welded pipes of DN 400 or (16 inch) and greater for Grade X52 or higher grades for pipelines conveying gas or multiphase fluid. SR6.2 Delete existing section and replace with the following:

Two transverse DWTT specimens shall be taken from one length of pipe from each heat supplied in the order. The specimens shall be taken at the locations shown in Fig. SR6.1. Tests shall be performed at 0 degrees C or at the minimum design temperature, whichever is lower.

Full transition curves shall be established for one heat out of ten, with a minimum of one. SR6.4 Delete existing section and replace with the following:

All specimens shall exhibit a minimum of 85% shear area on the fracture surface.

SUPPLEMENTARY REQUIREMENT SR15

SR15.1 Add to first paragraph:

The Manufacturer's certificate shall state that the pipe complies with this specification.

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ADDENDUM 1: MANUFACTURING PROCEDURE SPECIFICATION (MPS)

A1.1 Introduction

The manufacturer, prior to production shall submit a Manufacturing Procedure Specification to the Company for approval. As a minimum, the specification shall include the items listed in A1.2, A1.3 and A1.4 below. All these items shall be individually approved by the Company.

A1.2 Steel Supply

• Steelmaker

• Steel making and casting techniques including details of the following:

- Details of steel making process, including de-oxidation and desulphurisation practice, inclusion shape control method and the use of vacuum degassing.

- Details of casting process, i.e. ingot or continuous casting, including casting speed, vertical or curved caster, tundish superheat, gas shroud in tundish, segregation control measures.

- Details of slab reheating temperatures start and finish rolling temperatures and reduction ratios.

- Heat treatment details

- Chemical composition:

(a) Target chemistry;

(b) Ranges for deliberately added elements;

(c) Maxima for other elements specified in (Section 6.1) for combinations of elements (e.g, CE (IIW), CE(Pcm))

A1.3 Pipe Manufacture

a Pipe forming procedure b Pipe heat treatment procedure including temperatures, holding time, method of

quenching (external quenching or tank quenching), furnace type (batch furnace or “walking beam” furnace).

c Hydrostatic test procedures d Non-destructive inspection procedures

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A1.4 Pipe handling and transportation A Pipe handling, preservation and storage B. Transportation (by ship, rail or road)

ADDENDUM 2: MANUFACTURING PROCEDURE QUALIFICATION (MPQ)

A2.1 Introduction

The MPS shall be qualified by a Manufacturing Procedure Qualification (MPQ). An MPQ shall be carried out for each diameter and thickness combination. Unless otherwise agreed by the Company, any change to the MPS shall require re-qualification. For Qualification of the manufacturing procedure one pipe from among the first lot of 50 finished pipes produced from the same heat shall be selected by the Company’s Third Party Agency for inspection and tests. (Note: In the case of repeat orders of pipe of the same diameter and thickness, produced to the same MPS, the Company may agree a reduction in the level of MPQ testing). MPQ testing with prior agreement shall be carried out on one pipe out of 5 pipes selected by the Company appointed inspector, from the first inspection lot of 50 pipes produced. If production qualification is to be carried out on a small, pre-production run, the pipe for MPQ testing shall be selected from this run.

A2.2 Testing

A.2.2.1 General

The test pipe shall be subject to dimensional inspection to the requirements of Section 7, to non-destructive inspection as specified in Subsection 9.8 and hydrostatic testing to Subsection 9.4.

The test pipe shall then be subject to the following:

A2.2.2 Non-destructive Testing

The test pipe shall be subject to the following tests: The pipe body shall be subject to full visual examination for surface imperfections which shall be reported, regardless of size. Local magnetic particle inspection shall be used to assist identification of imperfections. Acceptance shall be to Subsection 7.8 as modified by this specification. The wall thickness shall be measured by ultrasonic inspection at intervals of one metre along the length of the pipe. Three readings, separated by 90°, shall be taken at each location. All readings shall be reported. The wall thickness shall not be less than the minimum specified wall thickness.

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A.2.2.3 Tensile Testing

For pipe diameters below 200 NB (8 inch NPS), two longitudinal tensile tests shall be taken from each end of the test pipe and tested in accordance with the specification. For pipes of diameter 200 NB (8 inch NPS) and above, one longitudinal tensile test and one transverse tensile test shall be taken from the pipe body at a frequency of one per inspection lot. The tests shall meet the requirements of Clause 6.2.1 as modified by this Specification.

A.2.2.4 Charpy Impact Testing

Charpy impact tests shall be carried out on all selected pipes in accordance with section 6.2.5 and 9.3.5.1 of this specification and Appendix F SR5.

A.2.2.4.1 Transition Curves

In addition to the above stated impact tests full transition temperature curves shall be produced. Sets of mid-thickness, Charpy impact tests shall be taken from the test pipe. For pipes of DN250 (NPS 10 inch) or less, longitudinal specimens shall be taken. For pipes greater than DN250 (NPS 10 inch), transverse specimens shall be taken except where the wall thickness prevents extraction of a 10 x 5 mm specimen, in which case longitudinal specimens shall be taken. They shall be tested at 10, 20 , 30°C etc below the production test temperature to produce full transition temperature curves showing impact energy (in Joules) and percentage shear (fibrous) of the fracture surface plotted against temperature over a temperature range sufficient to reproduce fracture appearance from 10% to 100% fibrous shear for the material. The results are for information.

A2.2.5 Hardness Survey

Sections shall be taken from both ends and at one metre intervals along the length of the test pipe for hardness survey in accordance with New Clause 9.3.6. The acceptance criteria are as specified in New Clause 6.2.8.

A2.2.6 Hydrogen Induced Cracking (HIC) Tests

HIC testing shall be carried out on samples of the test pipe in accordance with New Clause 9.3.7. Acceptance shall be in accordance with New Clause 6.2.9.

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A2.3 Weldability Tests

A2.3.1 General

The weldability of the line pipe material produced by the manufacturer shall be demonstrated to ensure that the as supplied material can be satisfactorily welded at site or on the lay barge without excessive precautions and preheat or post weld heat treatment. The steel mill shall submit past records of girth welding procedure qualification test records (PQRs) and recommended welding procedure specifications (WPS) for the grades of pipe supplied for Company records. Weldability tests shall be required for API 5L X60 and higher grades. Where several pipe diameters and wall thicknesses are produced for the same pipe grade by the same mill with the same MPS for a given order, then weldability test shall be conducted on the combination of thickest wall and largest diameter pipe from the first heat.

The pipe shall be subjected to weldability tests for girth welding with a procedure similar to the applicable field welding procedure, i.e. with cellulose coated electrodes of compatible mechanical properties to the grade of steel welded (E7010-P1 for X60 and E8010-P1 for X65) and welded in the 5G position with a downhill welding progression. The details of testing and acceptance criteria shall be in accordance with ADCO welding specification 30.99.00.0041-1, Shell DEP 61.40.20.30 and API 1104. The hardness in the weld and heat affected zone shall not exceed 248HV10 in the as-welded condition.

A2.3.2 Material

The material selected for weldability trials shall be representative of the highest carbon equivalent of line pipe casts produced. The cast of material to be used for weldability trials shall be approved by the Company designated inspector. However the steel cast used for weldability trial may have the production maximum carbon equivalent minus 0.02%.

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ADDENDUM 3: FULL RING TEST FOR SULPHIDE STRESS CRACKING (CAPCIS)

A3.1 General

The steel mill shall submit past records of full ring CAPCIS tests conducted on the same grades and similar pipe sizes and wall thicknesses for Company review at the bid stage. For pipelines in sour service, one or more girth welds shall be prepared and tested for resistance to HIC, stress orientated hydrogen induced cracking (SOHIC) and SSC using the full ring method developed by CAPCIS (Corrosion and Protection Centre Industrial Services, University of Manchester Institute of Science and Technology)

A3.2 Welding

Welding of the test rings shall be as for the full scale weldability trials, except that the length of the completed welded test piece shall be at least equal to the pipe diameter. One or more welding procedures shall be approved as representative of production welding specified by the purchaser and at least one ring per procedure shall be produced. If required by the Purchaser a test ring shall also be produced containing repair welds. On completion of welding, the ring(s) shall be radiographed. Radiographic method and acceptance criteria shall be as specified in the Principal’s specification, except that the position and description of all imperfections detected by radiography shall be reported.

A3.3 Testing

The test method shall be according to Offshore Technology Report OTI 95 635. Test solution A shall (unless otherwise specified) be in accordance with NACE TM0177. The internal surface of the ring shall be exposed to this solution for a period of 30 days. Unless otherwise specified by the purchaser the stress level shall be 72% of SMYS. The onset of corrosion induced damage shall be monitored by ultrasonic examination throughout the test. On completion of the 30 days or sooner if ultrasonic examination indicated severe damage, the internal surface shall be subject to magnetic particle inspection. Any imperfection found by either ultrasonic or magnetic particle inspection shall be investigated by sectioning and metallographic examination. All such features shall be reported with accompanying photo-micrographs.

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The acceptance standard shall be:

a) No individual HIC, SOHIC or SSC cracks greater than 1mm.

b) Total crack area (as determined by ultrasonic inspection) to be less than 3% of test area.

c) No de-lamination cracks greater than 5mm.

A3.4 Tests Required

Full ring SSC tests shall be required for API 5L X60 and higher grades only. Where several pipe diameters and wall thicknesses are produced for the same pipe grade by the same mill for a given order, then CAPCIS test shall be conducted on the combination of thickest wall and largest diameter pipe from the first heat.

ADDENDUM 4: PIPE FOR BENDING OR HEAT TREATMENT

If pipe is required for induction bending or if it is intended to be subject to heat treatment on installation, this will be stated in the Purchase Order. Where so required the pipe, shall be capable of retaining the mechanical and sulphide stress corrosion cracking resistant properties specified in this Specification after the induction bending process, which may include austenitising, quenching and tempering, normalizing heat treatment at a temperature proposed to be used during installation to be stated in the Purchase Order. The manufacturer shall supply evidence, acceptable to the Company, that these properties shall be met. This shall take the form of either the results of trials or records of previous production.

ADDENDUM 5: LINE PIPE DATA SHEET - SEAMLESS PIPES

The following information will be specified by the Company in accordance with Subsection 4.2 of this Specification. Project …………………………….. Reference ………………… Nominal Pipe Size …………………. Nominal Wall Thickness ………… Nominal outside diameter ……………… as per API 5L (43rd Edition) Pipe Grade ………………………… Design Pressure (bar.) ……… Min. Design Temperature (°C) ………… Max. Design Temperature (°C) ….. Process of Manufacture ………….. Service (Gas, Oil, Water) …………….. Project Specific Dimensional Requirements

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Weld Bevel

Blast Clean Internal Surface (Seamless pipes, gas service only)…………… … Pipe Required for Induction Bends …………………………………………… Pipe to be subjected to PWHT(Yes/No) ……… PWHT Temp (°C) ……. Drop Weight Tear Test Required (Yes/No) …… Test Temp (°C) ………….. as per SR-6 API 5L 43rd Edition. Weldability Tests (a) Full Scale Test Required (Yes/No) …………………………….. Full Ring Corrosion Tests Required (Yes/No) …………………… Stress Level………% of SMYS Other, Project Specific Requirements

ADDENDUM 6: REFERENCED CODES, STANDARDS & TECHNICAL DOCUMENTS Where referred in this Specification, the latest edition of Codes, Standards and Technical Documents listed below shall, to the extent specified herein, represent part of this Specification unless otherwise stated. American Petroleum Institute (API) API Specification 5 L Specifications for Line Pipe (43rd Edition) European Standards BSEN 10204 Metallic Products Types of inspection Documents

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International Organisation for Standards (ISO) ISO 9303 Full peripheral ultrasonic testing for the detection of longitudinal

imperfections ISO 9305 Full peripheral ultrasonic testing for the detection of transverse

imperfections ISO 10474 Steel and Steel Products, Inspection documents ISO 10124 Seamless and welded (except SAW) steel tubes for pressure

purposes- UT for the detection of laminar imperfections ISO 11496 Seamless and welded steel tubes for pressure purposes- UT of

tube ends for the detection of laminar imperfections ISO 10543 Full peripheral ultrasonic thickness testing

ISO 8501-1 Preparation of Steel Substrates before Application of Paints and

Related Products – Visual Assessment of Surface Cleanliness – Part 1: Rust Grades and Preparation Grades of Uncoated Steel Substrates and of Steel Substrates after Overall Removal of Previous Coatings.

ISO 9001 Quality Management Systems - Requirements

NACE International (NACE)

MR0175/ ISO 15156 Standard Material Requirements for Sulphide Stress Cracking Resistant Metallic Materials for Oil Field Equipment

NACE TM0177 Laboratory Testing of Metals for Resistance to Specific Forms of Environmental Cracking in H2S environments

NACE TM0284 Evaluation of Pipeline and Pressure Vessel Steels for Resistance to Hydrogen-Induced Cracking

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ADDENDUM 7: ABBREVIATIONS

ADCO Abu Dhabi company for Onshore Oil Operations ASNT American Society for Non-destructive Testing Inc. CE(IIW) Carbon Equivalent – International Institute of Welding Formula CE(Pcm) Carbon Equivalent – Parameter for crack measurement - Ito-

Bessyo Formula CLR Crack Length Ratio CSR Crack Sensitivity Ratio CTR Crack Thickness Ratio DWTT Drop Weight Tear Tests HAZ Heat Affected Zone HIC Hydrogen Induced Cracking ID Inside Diameter ITP Inspection and Test Plan KVL Charpy Value in Pipe Longitudinal Direction KVT Charpy Value in Pipe Transverse Direction MPa Mega Pascal MPQ Manufacturing Procedure Qualification MPS Manufacturing Procedure Specification OD Outside Diameter PSL Product Specification Level QA Quality Assurance QMS Quality Management System QC Quality Control SMTS Specified Minimum Tensile Strength SMYS Specified Minimum Yield Strength SOHIC Stress Orientated Hydrogen Induced Cracking SSC Sulphide Stress Cracking TPA Third Party Agency UTS Ultimate Tensile Strength YS Yield Stress

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ADDENDUM 8: DEFINITIONS Purchaser or Company ADCO or its Representative Manufacturer As defined by Subsection 3.9 of API SPEC 5L Representative The third party inspection agency (TPA) appointed by ADCO Quality Assurance All the planned and systematic activities necessary to ensure

quality, i.e to provided adequate confidence that the product or service will be fit for its intended service.

Quality Manual A document setting out the general quality policies, procedures

and practices of an organisation. Quality System The structure, organisation, responsibilities, activities, resources

and events that together provide organised procedures and methods of implementation to ensure the capability of the organisation to meet quality requirements.

Quality Plan A document prepared by the manufacturer setting out the specific

quality practices, resources and activities relevant to a particular project.

ITP Inspection & test plan prepared by the line pipe manufacturer reviewed and approved by ADCO highlighting the principal hold and witnessing points during the production of line pipe.

Defect (in NDT) a discontinuity or group of discontinuities whose indication(s) do

not meet specified acceptance criteria. Flaw /discontinuity: an interruption, which may be either intentional or unintentional,

in the (in NDT) physical structure or configuration of a pipe. Indication (in NDT): evidence of a discontinuity that requires interpretation to

determine its significance.

Minimum operating

temperature - the minimum temperature to which the pipeline or section of pipeline may be exposed during normal operational activities, including start-up and shut-down operations and controlled blow down, but excluding abnormal situations such as pipeline ruptures.

Pipe bevel the total weld preparation machined on the end of a pipe.

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ADDENDUM 9 - SUMMARY OF TESTING AND INSPECTION

First-day Production Tests During Production Types of

Test/Inspection Frequency Remarks Frequency Remarks

VISUAL INSPECTION

- dimensions all pipes all pipes - pipe end squareness all pipes 2 pipes per

shift

- straightness all pipes random - surface defects all pipes external all pipes external

ULTRASONIC EXAMINATION

- pipe ends all pipes 25mm of pipe ends

all pipes 25mm of pipe ends

- seamless pipe all pipes 25% of surface

all pipes 25% of surface

MT

- seamless pipe body all selected pipes

- bevel faces all pipes only if ultrasonic testing is impossible

all pipes only if ultrasonic testing is impossible

Project No.: MASTER

ADCO DOC. NO. 30-99-00-0105-1


DOCUMENT TITLE:

SEAMLESS LINE PIPE

PAGE 42 OF 44

ADDENDUM 9 - SUMMARY OF TESTING AND INSPECTION (continued)

First-day Production Tests During Production Types of Test/Inspection

Frequency Remarks. Frequency Remarks PHYSICAL TESTS - tensile test two selected

pipes two pipes per

inspection lot

- Charpy V-Notch - at temperature

in section 6.2.5

all selected pipes

as required for tensile test

- transition curve one pipe - Drop Weight Tear

Test

- transition curve one pipe one pipe per ten heats

- at minimum design temperature

all inspection lots

all inspection lots

- Macro, micro plus hardness

one pipe (3 specimens)

one pipe per inspection lot or after each stop in production

Hardness only for seamless pipes

HYDROTEST all pipes all pipes

CHEMICAL COMPOSITION

- Ladle analysis once per heat once per heat

- Check analysis twice per heat twice per heat

HYDROGEN INDUCED CRACKING TEST

first three heats one pipe per ten heats

Weldability tests Highest dia/WT pipe

See A.2.3 Not required

Full ring CAPCIS tests

Highest dia/WT pipe

See A.3.4 Not required

Project No.: MASTER

ADCO DOC. NO. 30-99-00-0105-1


DOCUMENT TITLE:

SEAMLESS LINE PIPE

PAGE 43 OF 44

ADDENDUM 10 – TPI REQUIREMENTS FOR 3.1C CERTIFICATION

ACTIVITY

REFERENCE DOCUMENT

CERTIFICATION LEVEL

DOCUMENT SUBMISSION REQUIRED

TPA INTERVENTION LEVEL

1. Scope This list covers the inspection and test requirements for carbon steel pipes used for oil and gas pipelines covered by API 5L

API 5L & this specification

2. Pre production Meeting H

3. General - Preliminary work

3.1 Status of sub-orders Production Plan R

3.2 Manufacturing Procedure Specification

MPS A R

3.3 Vendors Production Schedule R

3.4 Vendors Inspection & Test Plan This specification &

A R

3.5 Material test and certification This specification & PO

*3.1.B/ 3.1.C R

3.6 Procedures for rolling, heat treatment, inspection,, NDT and hydrostatic testing

API5L & this specification

A R

4. Production

4.1 Material Traceability and Examination Vendor Data Book

E

4.2 Heat analysis MPS R

4.3 Pipe rolling MPS E

4.4 Heat Treatments MPS & vendor procedure

E

4.5 Lining and Coating P.O specification E

(*)- Selection of Certification Levels for individual parts of the assembly shall be agreed with the Company A—Approval by Company prior to production. E- Examination or Checking during fabrication. H- Hold point. R- Review and endorse. W- Witness.

Project No.: MASTER

ADCO DOC. NO. 30-99-00-0105-1


DOCUMENT TITLE:

SEAMLESS LINE PIPE

PAGE 44 OF 44

ADDENDUM 10 – TPI REQUIREMENTS FOR 3.1C CERTIFICATION (continued)

ACTIVITY

REFERENCE DOCUMENT

CERTIFICATION LEVEL

DOCUMENT SUBMISSION REQUIRED

TPA INTERVENTION

LEVEL 5. Examination

5.1 Visual Dimensional Check Order specification E

5.2 NDE –UT calibration & inspection This specification W/R

5.3 NDE –pipe ends This specification W/R

5.4 Cutting, sampling and identification of test samples

This specification H

5.4 Mechanical testing for first-day production or MPQ

This specification H

5.5 Mechanical testing for production This specification W

5.5 HIC tests This specification W/R

5.6 Weldability tests This specification W

5.7 Full ring SSC tests This specification W

6. Testing

6.1 Hydrostatic Test This specification W/R

6.3 Hardness Test This specification R

7. Preparation for Despatch

7.1 Stamping & Colour Coding This specification E

7.2 Cleaning, Preservation and Surface Treatment

This specification E

7.3 Bevel Protectors This specification E

7.4 Inspection release note H

7.4 Preparation for Shipment and Packing

Packing list & loading records

E

8. Reports & Test Certification

8.1 Vendor Data Report including electronic documentation

R R

8.2 Material Test Certificates This specification *3.1.B/3.1.C R R

(*)- Selection of Certification Levels for individual parts of the assembly shall be agreed with the Company A- Approval by Company prior to production. E- Examination or Checking during fabrication. H- Hold point. R- Review and endorse. W- Witness.

MASTER-30-99-00-0105-1

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