1. Scope^*

1.1 This specification² covers steel pipe, electric-fusion-welded with filler metal added, fabricated from pressure-vessel quality plate of any of several analyses and strength levels and suitable for high-pressure service at moderate temperatures. Heat treatment may or may not be required to attain the desired properties or to comply with applicable code requirements. Supplementary requirements are provided for use when additional testing or examination is desired.

1.2 The specification nominally covers pipe 16 in. [400 mm] in outside diameter or larger with wall thicknesses up to 3 in. [75 mm], inclusive. Pipe having other dimensions may be furnished provided it complies with all other requirements of this specification.

1.3 Several grades and classes of pipe are provided:

1.3.1 Grade designates the type of plate used.

1.3.2 Class designates the type of heat treatment performed during manufacture of the pipe, whether the weld is radiographically examined, and whether the pipe has been pressure tested as listed in 1.3.3.

1.3.3 Class designations are as follows (Note 1):

Class	Heat Treatment on Pipe	Radiography (see Section)	Pressure Test (see Section)
10	none	none	none
11	none	9	none
12	none	9	8.3
13	none	none	8.3
20	stress relieved, see 5.3.1	none	none
21	stress relieved, see 5.3.1	9	none
22	stress relieved, see 5.3.1	9	8.3
23	stress relieved, see 5.3.1	none	8.3
30	normalized, see 5.3.2	none	none
31	normalized, see 5.3.2	9	none
32	normalized, see 5.3.2	9	8.3
33	normalized, see 5.3.2	none	8.3
40	normalized and tempered, see 5.3.3	none	none
41	normalized and tempered, see 5.3.3	9	none
42	normalized and tempered, see 5.3.3	9	8.3
43	normalized and tempered, see 5.3.3	none	8.3
50	quenched and tempered, see 5.3.4	none	none
51	quenched and tempered, see 5.3.4	9	none
52	quenched and tempered, see 5.3.4	9	8.3
53	quenched and tempered, see 5.3.4	none	8.3

Note 1—Selection of materials should be made with attention to temperature of service. For such guidance, Specification A20/A20M may be consulted.

1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

2. Referenced Documents

2.1 ASTM Standards:³

A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates
A530/A530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
A577/A577M Specification for Ultrasonic Angle-Beam Examination of Steel Plates
A578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
E109 Method for Dry Powder Magnetic Particle Inspection; Replaced by E709(Withdrawn 1981)⁴
E138 Method for Wet Magnetic Particle Inspection; Replaced by E709(Withdrawn 1981)
E110 Test Method for Rockwell and Brinell Hardness of Metallic Materials by Portable Hardness Testers
E165 Practice for Liquid Penetrant Testing for General Industry
E709 Guide for Magnetic Particle Testing

2.1.1 Plate Steel Specifications (Table 1):

A204/A204M Specification for Pressure Vessel Plates, Alloy Steel, Molybdenum
A285/A285M Specification for Pressure Vessel Plates, Carbon Steel, Low- and Intermediate-Tensile Strength
A299/A299M Specification for Pressure Vessel Plates, Carbon Steel, Manganese-Silicon
A302/A302M Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Molybdenum and Manganese-Molybdenum-Nickel
A515/A515M Specification for Pressure Vessel Plates, Carbon Steel, for Intermediate- and Higher-Temperature Service
A516/A516M Specification for Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service
A533/A533M Specification for Pressure Vessel Plates, Alloy Steel, Quenched and Tempered, Manganese-Molybdenum and Manganese-Molybdenum-Nickel
A537/A537M Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel

2.2 ASME Boiler and Pressure Vessel Code:⁵

Section II
Section III
Section VIII
Section IX

^* A Summary of Changes section appears at the end of this standard.

¹ This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.
Current edition approved March 1, 2020. Published March 2020. Originallyapproved in 1972. Last previous edition approved in 2019 as A671/A671M - 19. DOI:10.1520/A0671 A0671M-20.

² For ASME Boiler and Pressure Vessel Code applications see related Specification SA-672 in Section II of that Code.

³ For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at service @astm.org. For Annual Book of ASTMStandards volume information, refer to the standard's Document Summary page on the ASTM website.

⁴ 4 The last approved version of this historical standard is referenced on www.astm.org.

⁵ Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Two Park Ave., New York, NY 10016-5990, http://www.asme.org.

3. Terminology

3.1 Definitions of Terms Specific to This Standard:

3.1.1 A lot shall consist of 200 ft [60 m] or fraction thereof of pipe from the same heat of steel.

3.1.2 The description of a lot may be further restricted by use of Supplementary Requirement S14.

4. Ordering Information

4.1 The inquiry and order for material under this specification should include the following information:

4.1.1 Quantity (feet, metres, or number of lengths),
4.1.2 Name of material (steel pipe, electric-fusion-welded),
4.1.3 Specification number,
4.1.4 Grade and class designations (see 1.3),
4.1.5 Size (inside or outside diameter, nominal or minimum wall thickness),
4.1.6 Length (specific or random),
4.1.7 End finish (11.4),
4.1.8 Purchase options, if any (see 5.2.3, 11.3, 14.1 and Sections 16, 20.1, 21, 22 of Specification A530/A530M), and
4.1.9 Supplementary requirements, if any (refer to S1 through S15).

5. Materials and Manufacture

5.1 Materials—The steel plate material shall conform to the requirements of the applicable plate specification for pipe grade ordered as listed in Table 1.

TABLE 1 Plate Specification
Pipe Grade	Type of Steel	ASTM Specification	Grade / Class / Type
A45	plain carbon	A285/A285M	A
A50	plain carbon	A285/A285M	B
A55	plain carbon	A285/A285M	C
B60	plain carbon, killed	A515/A515M	60
B65	plain carbon, killed	A515/A515M	65
B70	plain carbon, killed	A515/A515M	70
C55	plain carbon, killed, fine grain	A516/A516M	55
C60	plain carbon, killed, fine grain	A516/A516M	60
C65	plain carbon, killed, fine grain	A516/A516M	65
C70	plain carbon, killed, fine grain	A516/A516M	70
D70	manganese-silicon, normalized	A537/A537M	CL-1
D80	manganese-silicon, quenched and tempered	A537/A537M	CL-2
H75	manganese-molybdenum-normalized	A302/A302M	A
H80	manganese-molybdenum-normalized	A302/A302M	B,C or D
J80	manganese-molybdenum-Q&T^A	A533/A533M	CL-1^B
J90	manganese-molybdenum-Q&T^A	A533/A533M	CL-2^B
J100	manganese-molybdenum-Q&T^A	A533/A533M	CL-3^B
L65	molybdenum	A204/A204M	A
L70	molybdenum	A204/A204M	B
L75	molybdenum	A204/A204M	C
N75	manganese-silicon	A299/A299M	A

^A Q&T = quenched and tempered.

^B Any grade may be furnished.

5.2 Welding:

5.2.1 The joints shall be double-welded, full-penetration welds made in accordance with procedures and by welders or welding operators qualified in accordance with the ASME Boiler and Pressure Vessel Code, Section IX.

5.2.2 The welds shall be made either manually or automatically by an electric process involving the deposition of filler metal.

5.2.3 The welded joint shall have positive reinforcement at the center of each side of the weld, but not more than 1/8 in. [3 mm]. This reinforcement may be removed at the manufacturer's option or by agreement between the manufacturer and purchaser. The contour of the reinforcement shall be smooth, and the deposited metal shall be fused smoothly and uniformly into the plate surface.

5.2.4 When radiographic examination in accordance with 9.1 is to be used, the weld reinforcement shall be governed by the more restrictive provisions of UW-51 of Section VIII of the ASME Boiler and Pressure Vessel Code instead of 5.2.3 of this specification.

5.3 Heat Treatment

All classes other than 10, 11, 12 and 13 shall be heat treated in furnace controlled to ±25°F [15 °C] and equipped with a recording pyrometer so that heating records are available. Heat treating after forming and welding shall be to one of the following:

5.3.1 Classes 20, 21, 22, and 23 pipe shall be uniformly heated within the post-weld heat-treatment temperature range indicated in Table 2 for a minimum of 1 h/in. [0.4 hr/cm] of thickness or 1 h, whichever is greater.

5.3.2 Classes 30, 31, 32, and 33 pipe shall be uniformly heated to a temperature in the austenitizing range and not exceeding the maximum normalizing temperature indicated in Table 2 and subsequently cooled in air at room temperature.

5.3.3 Classes 40, 41, 42, and 43 pipe shall be normalized in accordance with 5.3.2. After normalizing, the pipe shall be reheated to the tempering temperature indicated in Table 2 as a minimum and held at temperature for a minimum of ½ h/in. [0.2 hr/cm] of thickness or ½ h, whichever is greater, and air cooled.

5.3.4 Classes 50, 51, 52, and 53 pipe shall be uniformly heated to a temperature in the austenitizing range, and not exceeding the maximum quenching temperature indicated in Table 2 and subsequently quenched in water or oil. After quenching the pipe shall be reheated to the tempering temperature indicated in Table 2 as a minimum and held at temperature for a minimum of ½ h/in. [0.2 hr/cm] of thickness or ½ h, whichever is greater, and air cooled.

TABLE 2 Heat Treatment Parameters^A
Pipe Grade^B	Specification and Grade^C	Post-Weld Heat-Treat Temperature Range, °F (°C)	Normalizing Temperature, max, °F (°C)	Quenching Temperature, max, °F (°C)	Tempering Temperature, min, °F (°C)
A 45	A 285A	1100–1250 [590–680]	1700 [925]	...	...
A 50	A 285B	1100–1250 [590–680]	1700 [925]	...	...
A 55	A 285C	1100–1250 [590–680]	1700 [925]	...	...
B 60	A515-60	1100–1200 [590–650]	1750 [950]	...	...
B 65	A515-65	1100–1200 [590–650]	1750 [950]	...	...
B 70	A515-70	1100–1200 [590–650]	1750 [950]	...	...
C 55	A516-55	1100–1200 [590–650]	1700 [925]	1650 [900]	1100 [590]
C 60	A516-60	1100–1200 [590–650]	1700 [925]	1650 [900]	1100 [590]
C 65	A516-65	1100–1200 [590–650]	1700 [925]	1650 [900]	1100 [590]
C 70	A516-70	1100–1200 [590–650]	1700 [925]	1650 [900]	1100 [590]
D 70	A537-Cl 1	1100–1250 [590–680]	1700 [925]	...	...
D 80	A537-Cl 2	1100–1250 [590–680]	...	1650 [900]	1100 [590]
H 75	A 302-A	1100–1250 [590–680]	1800 [980]	...	1100 [590]
H 80	A 302-B, C or D	1100–1250 [590–680]	1800 [980]	...	1100 [590]
J 80	A 533-C1 1^C	1100–1250 [590–680]	...	1800 [980]	1100 [590]
J 90	A 533-C1 2^C	1100–1250 [590–680]	...	1800 [980]	1100 [590]
J 100	A 533-C1 3^C	1100–1250 [590–680]	...	1800 [980]	1100 [590]
L 65	A 204A	1100–1200 (590–650)	...	...	...
L 70	A 204B	1100–1200 (590–650)	...	...	...
L 75	A 204C	1100–1200 (590–650)	...	...	...
N 75	A299 A	1100–1200 [590–650]	1700 [925]	...	...

^AWhere ellipses (...) appear in this table, there is no requirement.
^BNumbers indicate minimum tensile strength in ksi.
^CAny grade may be used.

6. General Requirements

6.1 Material furnished to this specification shall conform to the applicable requirements of the current edition of Specification A530/A530M unless otherwise provided herein.

7. Chemical Composition

7.1 Product Analysis of Plate—The pipe manufacturer shall make an analysis of each mill heat of plate material. The product analysis so determined shall meet the requirements of the plate specification to which the material was ordered.

7.2 Product Analysis of Weld—The pipe manufacturer shall make an analysis of the finished deposited weld material from each 500 ft [150 m] or fraction thereof. Analysis shall conform to the welding procedure for deposited weld metal.

7.3 Analysis may be taken from the mechanical test specimens. The results of the analyses shall be reported to the purchaser.

7.4 If the analysis of one of the tests specified in 7.1 or 7.2 does not conform to the requirements specified, analyses shall be made on additional pipes of double the original number from the same lot, each of which shall conform to the requirements specified. Nonconforming pipe shall be rejected.

8. Mechanical Properties

8.1 Tension Test:

8.1.1 Requirements—Transverse tensile properties of the welded joint shall meet the minimum requirements for ultimate tensile strength of the specified plate material. In addition for Grades Dxx, Hxx, Jxx, and Nxx in Classes 3x, 4x, and 5x transverse tensile properties of the base plate, shall be determined on specimens cut from the heat-treated pipe. These properties shall meet the mechanical test requirements of the plate specification.

8.1.2 Number of Tests—One test specimen shall be made to represent each lot of finished pipe.

8.1.3 Test Specimen Location and Orientation—The test specimens shall be taken transverse to the weld at the end of the finished pipe and may be flattened cold before final machining to size.

8.1.4 Test Method—The test specimen shall be made in accordance with QW-150 in Section IX of the ASME Boiler and Pressure Vessel Code. The test specimen shall be tested at room temperature in accordance with Test Methods and Definitions A370.

8.2 Transverse-Guided-Weld-Bend Tests:

8.2.1 Requirements—The bend test shall be acceptable if no cracks or other defects exceeding 1/8 in. [3 mm] in any direction are present in the weld metal or between the weld and the base metal after bending. Cracks that originate along the edges of the specimen during testing, and that are less than 1/4 in. [6 mm] measured in any direction shall not be considered.

8.2.2 Number of Tests—One test (two specimens) shall be made to represent each lot of finished pipe.

8.2.3 Test Specimen Location and Orientation—Two bend test specimens shall be taken transverse to the weld at the end of the finished pipe. As an alternative by agreement between the purchaser and the manufacturer, the test specimens may be taken from a test plate of the same material as the pipe, the test plate being attached to the end of the cylinder and welded as a prolongation of the pipe longitudinal seam.

8.2.4 Test Method—The test requirements of Test Methods and Definitions A370, paragraph A2.5.1.7 shall be met. For wall thickness over 3/8 in. [10 mm] but less than 3/4 in. [19 mm] side-bend tests may be made instead of the face and root-bend tests. For wall thicknesses 3/4 in. [19 mm] and over both specimens shall be subjected to the side-bend test.

8.3 Pressure Test

Classes X2 and X3 pipe shall be tested in accordance with Specification A530/A530M, Hydrostatic Test Requirements.

9. Radiographic Examination

9.1 The full length of each weld of Classes X1 and X2 shall be radiographically examined in accordance with and meet the requirements of the ASME Boiler and Pressure Vessel Code, Section VIII, paragraph UW-51.

9.2 Radiographic examination may be performed prior to heat treatment.

10. Rework

10.1 Elimination of Surface Imperfections

Unacceptable surface imperfections shall be removed by grinding or machining. The remaining thickness of the section shall be no less than the minimum specified in Section 11. The depression after grinding or machining shall be blended uniformly into the surrounding surface.

10.2 Repair of Base Metal Defects by Welding:

10.2.1 The manufacturer may repair, by welding, base metal where defects have been removed, provided the depth of the repair cavity as prepared for welding does not exceed 1/3 of the nominal thickness and the requirements of 10.2.2-10.2.6 are met. Base metal defects in excess of these may be repaired with proper approval of the customer.

10.2.2 The defect shall be removed by suitable mechanical or thermal cutting or gouging methods and the cavity prepared for repair welding.

10.2.3 The welding procedure and welders or welding operators are to be qualified in accordance with Section IX of the ASME Boiler and Pressure Vessel Code.

10.2.4 The full length of the repaired pipe shall be heat treated after repair in accordance with the requirements of the pipe class specified.

10.2.5 Each repair weld of a defect where the cavity, prepared for welding, has a depth exceeding the lesser of 3/8 in. [10 mm] or 10% of the nominal thickness shall be examined by radiography in accordance with the methods and the acceptance standards of Section 9.

10.2.6 The repair surface shall be blended uniformly into the surrounding base metal surface and examined and accepted in accordance with Section S6 or S8.

10.3 Repair of Weld Metal Defects by Welding:

10.3.1 The manufacturer may repair weld metal defects if he meets the requirements of 10.2.3, 10.2.4, 10.3.2, 10.3.3, and 10.4.

10.3.2 The defects shall be removed by suitable mechanical or thermal cutting or gouging methods and the repair cavity examined and accepted in accordance with Sections S7 or S9.

10.3.3 The weld repair shall be blended uniformly into the surrounding metal surfaces and examined and accepted in accordance with 9.1 and Sections S7 or S9.

10.4 Retest

Each length of repaired pipe of a class requiring a pressure test shall be hydrostatically tested following repair.

11. Dimensions, Mass and Permissible Variations

11.1 The wall thickness and weight for welded pipe furnished to this specification shall be governed by the requirements of the specification to which the manufacturer ordered the plate.

11.2 Permissible variations in dimensions at any point in a length of pipe shall not exceed the following:

11.2.1 Outside Diameter-Based on circumferential measurement ±0.5 % of the specified outside diameter.
11.2.2 Out-of-Roundness-Difference between major and minor outside diameters, 1 %.
11.2.3 Alignment-Using a 10-ft [3-m] straightedge placed so that both ends are in contact with the pipe, 1/8 in. [3 mm].
11.2.4 Thickness-The minimum wall thickness at any point in the pipe shall not be more than 0.01 in. [0.3 mm] under the specified nominal thickness.

11.3 Circumferential welded joints of the same quality as the longitudinal joints shall be permitted by agreement between the manufacturer and the purchaser.

11.4 Lengths with unmachined ends shall be within -0, +1/2 in. [-0, +13 mm] of that specified. Lengths with machined ends shall be as agreed upon between the manufacturer and the purchaser.

12. Workmanship, Finish, and Appearance

12.1 The finished pipe shall be free of injurious defects and shall have a workmanlike finish. This requirement is to mean the same as the identical requirement that appears in Specification A20/A20M with respect to steel plate surface finish.

13. Product Marking

13.1 In addition to the marking provision of Specification A530/A530M, class marking in accordance with 1.3.3 shall follow the grade marking; for example, C 70-10.

13.2 Bar Coding-In addition to the requirements in 13.1, bar coding is acceptable as a supplemental identification method. The purchaser may specify in the order a specific bar coding system to be used.

SUPPLEMENTARY REQUIREMENTS

One or more of the following supplementary requirements shall be applied only when specified by the purchaser in the inquiry, contract, or order. Details of these supplementary requirements shall be agreed upon in writing by the manufacturer and purchaser. Supplementary requirements shall in no way negate any requirement of the specification itself.

S1. Tension and Bend Tests

S1.1 Tension tests in accordance with 8.1 and bend tests in accordance with 8.2 shall be made on specimens representing each length of pipe.

S2. Charpy V-Notch Test (For pipe with nominal wall thickness of 1/2 in. [13 mm] and greater)

S2.1 Requirements—The acceptable test energies shall be as shown in Table A1.15 of Specification A20/A20M for the applicable plate specification unless otherwise stated in the order. As an alternative, the test temperature may be 10°F [-12 °C].

S2.2 Number of Specimens—Each test shall consist of at least three specimens.

S2.2.1 One base metal test shall be made from one pipe length per heat per heat-treat charge per nominal wall thickness. For pipe from Classes 10, 11, 12, and 13, one base metal test shall be made per heat per size and per wall thickness.

S2.2.2 One weld-metal and one heat-affected zone (HAZ) metal test shall be made in accordance with NB 4335 of Section III of the ASME Boiler and Pressure Vessel Code.

S2.3 Test Specimen Location and Orientation:

S2.3.1 Base-metal specimens of stress-relieved, normalized, and normalized and tempered pipe shall be taken in accordance with the provisions for tension specimens in the body of this specification.

S2.3.2 Base-metal specimens of quenched and tempered pipe shall be taken in accordance with the provisions of NB 2225 of Section III of the ASME Boiler and Pressure Vessel Code.

S3. Hardness Test

S3.1 Hardness measurements in accordance with Test Methods and Definitions A370 or Test Method E110 shall be made across the welded joint at both ends of each length of pipe. The maximum acceptable hardness shall be as agreed upon between the manufacturer and the purchaser.

S4. Product Analysis

S4.1 Product analyses in accordance with 7.1 shall be made on each 500 ft [150 m] of pipe or fraction thereof or alternatively, on each length of pipe as designated in the order.

S5. Metallography

S5.1 The manufacturer shall furnish one photomicrograph to show the microstructure of 100x magnification of the weld metal or base metal of the pipe in the as-finished condition. The purchaser shall state in the order: the material, base metal or weld, and the number and locations of tests to be made. This test is for information only.

S6. Magnetic Particle Examination of Base Metal

S6.1 All accessible surfaces of the pipe shall be examined in accordance with Methods E109 or E138. Accessible is defined as: All outside surfaces, all inside surfaces of pipe 24 in. [600 mm] in diameter and greater, and inside surfaces of pipe less than 24 in. [600 mm] in diameter for a distance of one pipe diameter from the ends.

S6.2 Acceptance Standards—The following relevant indications are unacceptable:

S6.2.1 Any linear indications greater than 1/16 in. [1 mm] long for materials less than 5/8 in. [16 mm] thick; greater than 1/8 in. [3 mm] long for materials 5/8 in. [16 mm] thick to under 2 in. [50 mm] thick; and greater than 3/16 in. [5 mm] long for materials 2 in. [50 mm] thick or greater.
S6.2.2 Rounded indications with dimensions greater than 1/8 in. [3 mm] for thicknesses less than 5/8 in. [16 mm] and greater than 3/16 in. [5 mm] for thicknesses 5/8 in. [16 mm] and greater.
S6.2.3 Four or more indications in any line separated by 1/16 in. [1 mm] or less edge-to-edge.
S6.2.4 Ten or more indications in any 6 in.² [39 cm²] of surface with the major dimension of this area not to exceed 6 in. [150 mm] when it is taken in the most unfavorable orientation relative to the indications being evaluated.

S7. Magnetic Particle Examination of Weld Metal

S7.1 All accessible weld shall be examined in accordance with Practice E709. Accessible is defined as: All outside surfaces, all inside surfaces of pipe less than 24 in. [600 mm] in diameter for a distance of one pipe diameter from the ends.

S7.2 Acceptance Criteria—The following relevant indications are unacceptable:

S7.2.1 Any cracks and linear indications
S7.2.2 Rounded indications with dimensions greater than 3/16 in. [5 mm].
S7.2.3 Four or more indications in any line separated by 1/16 in. [1 mm] or less edge-to-edge.
S7.2.4 Ten or more indications in any 6 in.² [39 cm²] of surface with the major dimension of this area not to exceed 6 in. [150 mm] when it is taken in the most unfavorable orientation relative to the indications being evaluated.

S8. Liquid Penetrant Examination of Base Metal

S8.1 All accessible surfaces of the pipe shall be examined in accordance with Test Method E165. Accessible is as defined in S6.1.

S8.2 The acceptance criteria shall be in accordance with S6.2.

S9. Liquid Penetrant Examination of Weld Metal

S9.1 All accessible surfaces of the pipe shall be examined in accordance with Test Method E165. Accessible is as defined in S7.1.

S9.2 The acceptance criteria shall be in accordance with S7.2.

S10. Straight Beam Ultrasonic Examination of Flat Plate-UT1

S10.1 The plate shall be examined and accepted in accordance with Specification A435/A435M except that 100% of one surface shall be scanned by moving the search unit in parallel paths with not less than 10% overlap.

S11. Straight Beam Ultrasonic Examination of Flat Plate-UT 2

S11.1 The plate shall be examined in accordance with Specification A578/A578M except that 100 % of one surface shall be scanned and the acceptance criteria shall be as follows:

S11.2 Any area, where one or more discontinuities produce a continuous total loss of back reflection accompanied by continuous indications on the same plane that cannot be encompassed within a circle whose diameter is 3 in. [75 mm] or 1/2 of the plate thickness, whichever is greater, is unacceptable. In addition, two or more discontinuities on the same plane and having the same characteristics but smaller than described above shall be unacceptable unless separated by a minimum distance equal to the largest diameter of the larger discontinuity or unless they may be collectively encompassed by the circle described above.

S12. Angle-Beam Ultrasonic Examination (Plate Less than 2 in. [50 mm] Thick)-UT 3

S12.1 The plate shall be examined in accordance with Specification A577/A577M except that the calibration notch shall be V-shaped and the acceptance criteria shall be as follows: Any area showing one or more reflectors producing indications whose amplitude exceeds that of the calibration notch is unacceptable.

S13. Repair Welding

S13.1 Repair of base metal defects by welding shall be done only with customer approval.

S14. Description of Term

S14.1 lot—all pipe of the same mill heat of plate material and wall thickness (within 1/4 in. [6 mm]) heat treated in one furnace charge. For pipe that is not heat treated or that is heat treated in a continuous furnace, a lot shall consist of each 200 ft [60 m] or fraction thereof of all pipe of the same mill heat of plate material and wall thickness (within 1/4 in. [6 mm]), subjected to the same heat treatment. For pipe heat treated in a batch-type furnace that is automatically controlled within a 50 °F [30°C] range and is equipped with recording pyrometers so that heating records are available, a lot shall be defined the same as for continuous furnaces.

S15. ASME Section III Construction

S15.1 Products furnished under this specification that are intended for application under the rules of Section III of the ASME Boiler and Pressure Vessel Code shall be manufactured by holders of the appropriate ASME Certificate of Authorization and Certification Mark. The product is subject to all applicable requirements of Section III, including welding, heat treatment, nondestructive examination, authorized inspection at the point of manufacture, and application of the Certification Mark.

S15.2 The applicable ASME Partial Data Report form, signed by an Authorized Nuclear Inspector, and a material test report shall be furnished for each lot of pipe.

S15.3 The plate used to fabricate the pipe shall conform to the applicable SA specification in ASME Boiler and Pressure Vessel Code, Section II. The welded joints shall be full penetration butt welds as obtained by double welding or by other means that will obtain the same quality of deposited weld metal on the inside and outside. Welds using metal backing strips that remain in place are prohibited.

S15.4 In addition to the requirements of S14 and Section 13 (Product Marking), each length of pipe shall be so marked as to identify each such piece of pipe with the lot and the material test report.

SUMMARY OF CHANGES

Committee A01 has identified the location of selected changes to this specification since the last issue, A672/A672M - 14, that may impact the use of this specification. (Approved Nov. 1, 2019.)

(1) Added Supplementary Requirement S15 for ASME Section III Construction.

Standard Specification for Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures1

1. Scope*