SPE 74-039 Pipes Welded With CRA Cladding

MESC SPECIFICATION May 2005 SPE 74/039 of 8

PIPE, WELDED WITH CRA1 CLADDING ASTM A 671

1. SCOPE

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

This specification is applicable to:

- welded pipe to ASTM A 671, Grade 65, Class 22, cladded with CRA plate

- to ASTM B 443 - UNS N06625 (Alloy 625); - to ASTM B 424 - UNS N08825 (Alloy 825); - to ASTM A 240 - UNS S31254 (6 Moly); - to ASTM A 240 - UNS N08367; - to ASTM B 625 - UNS N08925.

- welded pipe to ASTM A 671, Grade 65, Class 22, with CRA weld overlay cladding

- to UNS N06625 (Alloy 625) - to UNS N08825 (Alloy 825); - to UNS S31254 (6 Moly); - to UNS N08367; - to 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).

API RP 582 Welding guidelines for the chemical, oil and gas industries

ASME V Article 5 Ultrasonic Examination Methods (UT) Clauses T-542.8.3, T-542.8.5 and T-543

ASME VIII Div 1 App 6 Methods for Magnetic Particle Examination (MT)

ASME VIII Div 1 App 8 Methods for Liquid Penetrant Examination (PT)

ASME VIII Div 1 App 12 Ultrasonic Examination of Welds (UT)

ASME VIII Div 1 UW-51 Radiographic and Radioscopic Examination of Welded Joints

ASTM A 240 Specification for Heat-Resisting Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels.

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 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

1 Corrosion Resistant Alloy


Applications

ASTM A 671 Specification for Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures

ASTM B 424 Standard specification for Ni-Fe-Cr-Mo-Cu Alloy (UNS N08825 and UNS N08821) Plate, Sheet, and Strip

ASTM B 443 Standard specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNS N06625 and UNS N06852) and Nickel-Chromium-Molybdenum-Silicon Alloy (UNS N06219) Plate, Sheet, and Strip

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 E 165 Liquid penetrant examination

ASTM E 709 Standard Guide for Magnetic Particle Examination

ASTM G 48 Standard Test Methods for Pitting & Crevice Corrosion Resistance of Stainless Steels & Related Alloys by Use of Ferric Chloride Solution

AWS A5.01 Filler metal procurement guidelines

DEP 30.10.60.18-Gen Welding of metals

3. GENERAL REQUIREMENTS

3.1 MANUFACTURING

Pipe shall be made from plate with an internally

- metallurgically bonded CRA layer, or - CRA weld overlay layer, or - CRA weld overlay layer

The final product shall comply with the mechanical properties in accordance with ASTM A 671, Grade 65, Class 22.

3.2 CRA CLAD THICKNESS

For metallurgically bonded CRA layer, the layer shall have a thickness of 3.0 mm with tolerance +2.00, -0.00 mm.

For CRA weld overlay layer, the layer shall be applied in two beads and have a thickness of 3.0 mm with tolerance +2.00, -0.00 mm.

3.3 WELDING

Welding procedure shall be approved by the Principal.

Weld overlay shall be performed in accordance with API RP 582 and DEP 30.10.60.18-Gen.

3.4 SURFACE FINISH

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

3.5 EXAMINATION

For welding procedure qualification, the analysis shall be done by energy dispersive X-ray spectroscope at a point located 1 mm below the surface.


3.6 TESTING

Testing shall be in accordance with ASTM A 264.

The bond integrity shall be tested by three transverse face bend tests. Samples for analysis shall be taken from the 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.

3.7 INSPECTION

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

Maximum iron dilution shall be 5% unless substantiated by corrosion tests.

3.8 REPAIRS OF DEFECTS

Weld repair shall be subject to approval by the Principal.

3.9 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.

3.10 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 A 671, Grade CC65, Class 22

The carbon content shall be 0.23% maximum.

The carbon equivalent (CE) shall be 0.43 maximum and shall be determined by the following formula:

Ceq CMn

6 +

Cr + Mo + V

5 +

Ni + Cu

15= +

where the above values are in %.

Starting plate material shall be normalised.

The welded clad pipe shall be stress relieved, according to ASTM A 671 Grade 65, Class 22.

4.2 CRA CLAD PLATE

4.2.1 ASTM B 443 UNS N06625 and ASTM B 424 UNS N08825

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

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


The longitudinal weld shall be overlay welded on the inside using a UNS N06625 filler material. For girth welds welded from both sides, the requirements for the longitudinal weld shall apply. For girth welds welded from one side only, UNS N06625 shall be used throughout.

The welds 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.

The welds 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.

4.2.2 ASTM A 240, Grades UNS S31254 and UNS N08367

Final heat treatment shall be annealed and water-cooled.

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


Material (including welds) 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 (including welds) 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 625 UNS N08925

Nitrogen content shall be 0.18 ≤ N ≤ 0.22%.

Final heat treatment shall be annealed and water-cooled.

Bond integrity and quality requirements shall be in accordance with ASTM A 264 Class 1.


Material (including welds) 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 (including welds) 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.


4.3 CRA CLAD WELD OVERLAY

4.3.1 UNS N06625

The weld overlay at the depth specified in Section 3.5 shall conform to the chemical composition specified in ASTM B 443 UNS N06625.

For gas shielded processes, the gas shall not contain nitrogen. Filler materials shall be batch tested as per schedule H of AWS A5.01 with a batch defined as Class C3 controlled by heat number for covered electrodes, and Class C2 controlled by heat number for bare solid electrodes. Batch certificates shall be included in the inspection documents. Change of filler metal brand name and manufacturing location shall be an essential variable.

4.3.2 UNS N08825

The weld overlay at the depth specified in Section 3.5 shall conform to the chemical composition specified in ASTM B 424 UNS N08825.

For gas shielded processes, the gas shall not contain nitrogen. Filler materials shall be batch tested as per schedule H of AWS A5.01 with a batch defined as Class C3 controlled by heat number for covered electrodes, and Class C2 controlled by heat number for bare solid electrodes. Batch certificates shall be included in the inspection documents. Change of filler metal brand name and manufacturing location shall be an essential variable.

4.3.3 UNS S31254, UNS N08367 and to UNS N08925.

The weld overlay at the depth specified in Section 3.5 shall conform to the chemical composition specified in respectively ASTM A 240 Grades S31254, N08367 or ASTM B 625 UNS N08925.

The nitrogen content for ASTM B 625 UNS N08925 shall be 0.18 ≤ N ≤ 0.22%.


Appendix 1 – Inspection requirements

Plate

1. Skelp The whole plate, 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

All edges 100 mm



Pipe

1. Ultimate pipe end 100 mm



2. Bevel end

Dye Penetrant Testing (DPT) or Liquid Penetrant Testing (DPT) in accordance with ASTM E 165; Acceptance: shall be in accordance with ASME VIII, Division 1, Appendix 8.

In case of ferritic materials: Magnetic Particle Testing (MPT) in accordance with ASTM E 709; Acceptance: shall be in accordance with ASME VIII, Division 1, Appendix 6.

3. Longitudinal weld seam The full length, including the ultimate end of weld seam:

Cap and root toe Dye Penetrant Testing (DPT) or Liquid Penetrant Testing (DPT) in accordance with ASTM E 165; Acceptance: shall be in accordance with ASME VIII, Division 1, Appendix 8.

In case of ferritic materials: Magnetic Particle Testing (MPT) in accordance with ASTM E 709; Acceptance: shall be in accordance with ASME VIII, Division 1, Appendix 6.

Weld bevel preparation > 15 deg (open bevel) ≤ 15 deg (steep bevel)

Wall thickness < 15.9 mm ≥ 15.9 mm < 12.7 mm ≥ 12.7 mm

Radiography (RT)

Ultrasonic Testing (UT)

Radiography (RT)


Longitudinal defects ASTM A 671 referring to ASME VIII-UW 51, acceptance

Shall be applied see Note 1&3

ASTM A 671 referring to ASME VIII-UW 51, acceptance



Transverse defects criteria included

Radioscopic Techniques and Digital Radiography are not allowed.


criteria included Radioscopic Techniques and Digital Radiography are not allowed.


4. Girth weld Only when applicable in shop

Cap and root toe Dye Penetrant Testing (DPT) or Liquid Penetrant Testing (DPT) in accordance with ASTM E 165; Acceptance: shall be in accordance with ASME VIII, Division 1, Appendix 8.

Weld bevel preparation > 15 deg (open bevel) ≤ 15 deg (steep bevel)

Wall thickness < 15.9 mm ≥ 15.9 mm < 12.7 mm ≥ 12.7 mm

Radiography (RT)


Radiography (RT)


Longitudinal defects Shall - see

be applied ”Warning”

Shall be applied ”Warning” - see

Transverse defects

ASTM A 671 referring to ASME VIII-UW 51, acceptance criteria included


Shall be applied - see “Warning”

ASTM A 671 referring to ASME VIII-UW 51, acceptance criteria included


Shall be applied - see “Warning”

Warning For double sided weld: See Note 1 & 3

For single sided weld: See Note 2 & 3

For double sided weld: See Note 1 & 3

For single sided weld: See Note 2 & 3

Notes

Note 1 The longitudinal weld seam

The weld seam is of a hybrid type with an inner part austenitic and a middle and outer part ferritic material. The ultrasonic examination of the pipe should take this aspect into account.

Examination method and criteria for the acceptable signal to noise ratios is given in Note 3. Acceptance criteria shall be in accordance with ASME VIII, Division 1, Appendix 12.

Note 2 The girth weld

The weld seam is of a full austenitic type. In case the weld bevel angle is steep (i.e. smaller than 15 deg.) a shear wave tandem arrangement to examine the weld bevel for lack of Sidewall Fusion shall be applied. In case the weld bevel angle is “open” (i.e. larger than 15 deg.) one of the probe angles shall be complementary to the weld bevel angle within 5 degrees.

Examination method and criteria for the acceptable signal to noise is given in Note 3. Acceptance criteria shall be in accordance with ASME VIII, Division 1, Appendix 12.


Note 3

ASME V, Article 5 – Clause T542.8.5, referring to Article 1 - Clause T150 applies. ASME V, Article 5 – Clause T542.8.3 applies, but when the signal to noise ratio for angle beam shear waves is below 10 dB, angle compression wave and creep wave probes are to be used and adaptations to be made accordingly.

The criteria for successful UT angle beam shear wave examination: the dynamic signal to noise ratio for ultrasound shall be better than 10 dB.

SPE 74-039 Pipes Welded With CRA Cladding

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