MESC SPECIFICATION May 2005 SPE 74/038 Page 1 of 5

PIPE, SEAMLESS WITH CRA1 CLADDING ASTM A 333

1. SCOPE

This specification shall apply in addition to the applicable MESC Buying Descriptions and the referenced standards.

This specification is applicable to:

- seamless pipe to ASTM A 333, Grade 6, co-extruded with

- CRA cladding to ASTM B 444 - UNS N06625 (Alloy 625); - CRA cladding to ASTM B 423 - UNS N08825 (Alloy 825). - CRA cladding to ASTM A 312 - UNS S31254 (6 Moly) - CRA cladding to ASTM A 312 - UNS N08367 - CRA cladding to ASTM B 677 - UNS N08925.

2. REFERENCES

In this specification reference is made to the following publications: Note: Unless specifically designated by date the latest issue of each publication shall be used (together

with any amendments/supplements/revisions thereto).

ASME VIII, Div 1, App 8 Methods for liquid penetrant examination

ASTM A 262 Standard Practices for detecting susceptibility to intergranular attack in austenitic stainless steels

ASTM A 264 Standard specification for Stainless Chromium-Nickel Steel-Clad Plate

ASTM A 265 Standard specification for Nickel and Nickel-Base Alloy-Clad Steel Plate

ASTM A 312 Standard specification for seamless, welded and heavily cold worked Austenitic Stainless Steel Pipes

ASTM A 333

Standard specification for seamless and welded steel pipe for low temperature service

ASTM A 380 Standard practice for cleaning, descaling and passivation of stainless steel parts, equipment and systems

ASTM A 578 Standard specification for straight-beam ultrasonic examination of plain and clad steel plates for special applications

ASTM A 999 Standard specification for general requirements for Alloy and Stainless Steel Pipe

ASTM B 423 Standard specification for Nickel-Iron-Chromium-Molybdenum-Copper Alloy (UNS N08825 and UNS N08821) Seamless Pipe and Tube

ASTM B 444 Standard specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNS N06625 and UNS N06852) and Nickel-Chromium-Molybdenum-Silicon Alloy (UNS N06219) pipe and tube

ASTM B 677 Standard specification for UNS N08904, UNS N08925, UNS N08354 and UNS N08926 Seamless Pipe and Tube

1 Corrosion Resistant Alloy

MESC SPECIFICATION May 2005 SPE 74/038 Page 2 of 5

ASTM B 625 Standard specification for UNS N08904, UNS N08925, UNS N08031, UNS N08932, UNS N08926, UNS N08354, and UNS R20033 plate, sheet, and strip

ASTM B 829 Standard specification for general requirements for Nickel and Nickel Alloys seamless pipe and tube

ASTM G 48 Standard test methods for pitting & crevice corrosion resistance of stainless steels and related alloys by use of ferric chloride solution

ASTM E 165 Test method for liquid penetrant examination

ASTM E 213 Standard practice for ultrasonic examination of metal pipe and tubing

ASTM E 797 Standard practice for measuring thickness by manual ultrasonic pulse-echo contact method

MESC SPE 74/004 Pipe, carbon and alloy steel, ASTM A 333

3. GENERAL REQUIREMENTS

3.1 MANUFACTURING

Pipe shall be co-extruded seamlessly with internal CRA cladding.

The final product shall comply with the mechanical properties in accordance with ASTM A 333, Grade 6.

3.2 CRA CLAD THICKNESS

The CRA layer shall have a thickness of 3.0 mm with a tolerance of +2.00, -0.00 mm.

3.3 SURFACE FINISH

The CRA cladding surface shall be pickled and cleaned in accordance with ASTM A 380. Procedure shall be approved by the Principal.

3.4 TESTING

Testing shall be in accordance with ASTM B 829.

The bond integrity shall be tested in accordance with ASTM A 264 by three transverse face bend tests.

Samples for testing shall be taken from finished pipe.

Frequency of testing procedures, as defined in this specification, shall be sufficient for the manufacturer to assure that all standard products would pass such a test if subsequently performed.

3.5 HEAT TREATMENT

Where PWHT is required, tests to determine mechanical properties and corrosion resistance shall be carried out in the PWHT condition.

3.6 INSPECTION

Inspection shall be carried out in accordance with Appendix 1. All procedures shall be approved by the Principal.

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3.7 REPAIR OF DEFECTS

Repair by welding is not permitted.

3.8 MARKING

Marking shall be in accordance with the applicable manufacturing specification for the base pipe including the nominal pipe size and schedule number, followed by the material specification of the CRA cladding and nominal cladding thickness in millimetres. Where applicable, the specification used for manufacturing the clad base material shall be added.

3.9 CERTIFICATION

The specified inspection certificates shall be supplied to the purchaser unless the purchaser specifies that they shall be retained by the supplier.

4. SPECIFIC REQUIREMENTS

4.1 PIPE

4.1.1 ASTM A333, Grade 6

Base pipe material shall be ASTM A 333 Grade 6, in accordance with the relevant MESC buying descriptions and MESC SPE 74/004.

Pipe shall be furnished in the hot formed, normalised and tempered, or quenched and tempered condition. For hot-formed pipe, the finishing temperature shall be > 780ºC. Pipe finished at a lower temperature than 780 ºC shall be subjected to a further normalising heat treatment.

The maximum hardness shall not exceed 325 Hv10.

4.2 CRA CLAD

4.2.1 ASTM B 444 - UNS N06625 and ASTM B 423 - UNS N08825

Bond integrity shall be in accordance with ASTM A 265, Class 1.

Final heat treatment shall be annealed and rapid air-cooled.

4.2.2 ASTM A 312 - UNS S31254 and N08367

Bond integrity shall be in accordance with ASTM A 264, Class 1.

Final heat treatment shall be annealed and water-cooled.

Material shall be subject to a Ferric Chloride Test in accordance with ASTM G 48, Method A. Test temperature shall be 50 ºC and the exposure time shall be 24 hours. Test specimens shall be in the as-delivered condition. The test shall expose the external and internal surfaces and a cross section surface including weld zone in full wall thickness. No pitting is acceptable at internal or external surfaces at 20 times magnification. The weight loss shall be < 4.0 g/m2.

Material shall be subject to an Intergranular Corrosion Test in accordance with ASTM A 262, Practice E. Acceptance shall be by no visible corrosion at 20 times magnification.

4.2.3 ASTM B 677 - UNS N08925

Bond integrity shall be in accordance with ASTM A 264, Class 1.

Final heat treatment shall be annealed and water-cooled.

Nitrogen content shall be 0.18 ≤ N ≤ 0.22%

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Material shall be subject to a Ferric Chloride Test in accordance with ASTM G 48, Method A. Test temperature shall be 50 ºC and the exposure time shall be 24 hours. Test specimens shall be in the as-delivered condition. The test shall expose the external and internal surfaces and a cross section surface including weld zone in full wall thickness. No pitting is acceptable at internal or external surfaces at 20 times magnification. The weight loss shall be < 4.0 g/m2.

Material shall be subject to an Intergranular Corrosion Test in accordance with ASTM A 262, Practice E. Acceptance shall be by no visible corrosion at 20 times magnification.

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Appendix 1 – Inspection requirements

Pipe UT examination is allowed to be performed from the outer surface

1. Pipe body The whole pipe, except 100 mm edge

For disband Supplementary requirements S3, S4 and S6 of ASTM A 578 shall apply.

The scanning procedure shall be in accordance with Section 5.6 of ASTM A 578.

Acceptance shall be in accordance with Level A of ASTM A 578: but scanning coverage shall be 25% of the total area.

For bond and clad flaw N/A

For clad thickness measurement From outer surface: in parallel with thickness measurements.

Coverage: same as “for disband”.

Acceptance: refer to Section 5 of main part of this specification.

For thickness of base material Shall be in accordance with ASTM E 797 or equivalent for immersion technique.

Coverage: same as “for disband”.

Acceptance: (tnominal – 15%) < t < tnominal + 20%, variation in thickness < 5% and tnominal = tbase material + tclad layer

For laminations in base material From outer surface: in parallel with thickness measurements.

Coverage: same as “for disband”.

Sensitivity: 6.4 mm diameter Flat Bottom Hole at mid-wall depth equals Reference Sensitivity Level (0 dB or 80% Full Screen Height).

Supplementary requirements S3, S4 and S6 of ASTM A 578 shall apply. The scanning procedure shall be in accordance with Section 5.6 of ASTM A 578.

For longitudinal and transverse defect in pipe volume and outer surface.

Shall be in accordance with ASTM E 213 (UT) with a notch depth of 5% of wall thickness (N5-notch).

Coverage: full coverage in both upstream and downstream directions.

Acceptance shall be in accordance with ASTM A 999, Section 22.3.10.

2. Ultimate pipe end 100 mm

For disband

For bond and clad flaw

Same as per “Pipe body”

“For disband” and “laminations’” except full coverage.

Supplementary requirements S3, S4 and S7 of ASTM A 578 shall apply.

Acceptance shall be in accordance with Level C of ASTM A 578.

3. Bevel end

DPT or LPT shall be in accordance with ASTM E 165.

Acceptance: in accordance with ASME VIII, Division 1, Appendix 8.

4. Whole pipe surface

Base material (outer surface) Visual inspection

Clad surface Visual inspection