ASTM B474/B474M-19(2023)
(Specification)Standard Specification for Electric Fusion Welded Nickel and Nickel Alloy Pipe
Standard Specification for Electric Fusion Welded Nickel and Nickel Alloy Pipe
ABSTRACT
This specification covers electric fusion welded pipe suitable for high-temperature or corrosive service. The pipes are designated into five classes namely Class 1, Class 2, Class 3, Class 4 and Class 5, according to how they are to be welded. The joints shall be full penetration double-welded or single-welded butt joints employing fusion welding processes. The furnished pipe shall undergo heat treatment and a chemical analysis shall be employed for both plate and weld. Each pipe shall be subjected to transverse tension test, transverse guided weld bend test and hydrostatic pressure test.
SCOPE
1.1 This specification covers electric fusion welded pipe suitable for high-temperature or corrosive service as listed in Table 1. (Although no restrictions are placed on the sizes of pipe that may be furnished under this specification, commercial practice is commonly limited to sizes not less than 8 in. [203 mm] nominal diameter.)
1.2 Five classes of pipe are covered as follows:
1.2.1 Class 1—Pipe shall be double welded by processes employing filler metal in all passes and shall be completely radiographed.
1.2.2 Class 2—Pipe shall be double welded by processes employing filler metal in all passes. No radiography is required.
1.2.3 Class 3—Pipe shall be single welded by processes employing filler metal in all passes and shall be completely radiographed.
1.2.4 Class 4—Same as Class 3 except that the weld pass exposed to the inside pipe surface may be made without the addition of filler metal.
1.2.5 Class 5—Pipe shall be double welded by processes employing filler metal in all passes and shall be spot radiographed.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.
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.
General Information
Relations
Standards Content (Sample)
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.
Designation: B474/B474M − 19 (Reapproved 2023)
Standard Specification for
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Electric Fusion Welded Nickel and Nickel Alloy Pipe
This standard is issued under the fixed designation B474/B474M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope and environmental practices, and determine the applicability
of regulatory limitations prior to use.
1.1 This specification covers electric fusion welded pipe
1.5 This international standard was developed in accor-
suitable for high-temperature or corrosive service as listed in
dance with internationally recognized principles on standard-
Table 1. (Although no restrictions are placed on the sizes of
ization established in the Decision on Principles for the
pipe that may be furnished under this specification, commercial
practice is commonly limited to sizes not less than 8 in. [203 Development of International Standards, Guides and Recom-
mm] nominal diameter.) mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.2 Five classes of pipe are covered as follows:
1.2.1 Class 1—Pipe shall be double welded by processes
2. Referenced Documents
employing filler metal in all passes and shall be completely
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radiographed.
2.1 ASTM Standards:
1.2.2 Class 2—Pipe shall be double welded by processes
A262 Practices for Detecting Susceptibility to Intergranular
employing filler metal in all passes. No radiography is re-
Attack in Austenitic Stainless Steels
quired.
A370 Test Methods and Definitions for Mechanical Testing
1.2.3 Class 3—Pipe shall be single welded by processes
of Steel Products
employing filler metal in all passes and shall be completely
B127 Specification for Nickel-Copper Alloy Plate, Sheet,
radiographed.
and Strip
1.2.4 Class 4—Same as Class 3 except that the weld pass
B162 Specification for Nickel Plate, Sheet, and Strip
exposed to the inside pipe surface may be made without the
B168 Specification for Nickel-Chromium-Aluminum Alloys
addition of filler metal.
(UNS N06699), Nickel-Chromium-Iron Alloys (UNS
1.2.5 Class 5—Pipe shall be double welded by processes
N06600, N06601, N06603, N06690, N06693, N06025,
employing filler metal in all passes and shall be spot radio-
N06045, and N06696), Nickel-Chromium-Cobalt-
graphed.
Molybdenum Alloy (UNS N06617), Nickel-Iron-
1.3 The values stated in either SI units or inch-pound units
Chromium-Tungsten Alloy (UNS N06674), and
are to be regarded separately as standard. The values stated in
B333 Specification for Nickel-Molybdenum Alloy Plate,
each system are not necessarily exact equivalents; therefore, to
Sheet, and Strip
ensure conformance with the standard, each system shall be
B424 Specification for Nickel-Iron-Chromium-
used independently of the other, and values from the two
Molybdenum-Copper Alloys Plate, Sheet, and Strip
systems shall not be combined.
B435 Specification for Heat and Corrosion Resistant High
1.4 This standard does not purport to address all of the
Temperature Alloy Plate, Sheet, and Strip
safety concerns, if any, associated with its use. It is the
B443 Specification for Nickel-Chromium-Molybdenum-
responsibility of the user of this standard to become familiar
Columbium Alloy and Nickel-Chromium-Molybdenum-
with all hazards including those identified in the appropriate
Silicon Alloy Plate, Sheet, and Strip
Safety Data Sheet (SDS) for this product/material as provided
B463 Specification for UNS N08020 Alloy Plate, Sheet, and
by the manufacturer, to establish appropriate safety, health,
Strip
B536 Specification for Nickel-Iron-Chromium-Silicon Al-
loys Plate, Sheet, and Strip
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This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys.
Current edition approved Nov. 1, 2023. Published November 2023. Originally
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approved in 1968. Last previous edition approved in 2019 as B474/B474M – 19. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DOI: 10.1520/B0474_B474M-19R23. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Designation established in accordance with ASTM E527 and SAE J 1086, Standards volume information, refer to the standard’s Document Summary page on
Practice for Numbering Metals and Alloys (UNS). the ASTM website.
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