ASTM A420/A420M-10
(Specification)Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
ABSTRACT
This specification covers wrought carbon steel and alloy steel pipe fittings of seamless and welded construction for use in pressure piping and pressure vessel service at low temperatures. Materials shall consist of forgings, bars, plates, seamless or fusion welded tubular products with filler metal added, and shall be produced by open-hearth, basic-oxygen, or electric-furnace process. Forging or forming operations shall be performed by one or a combination of two or more of the following procedures: hammering, pressing, piercing, extruding, upsetting, working, bending, fusion-welding, or machining. All welding shall be completed prior to the austenitizing heat treatment, which shall be executed in the normalized, normalized and tempered, annealed, or quenched and tempered conditions. Steel specimens shall conform to required values of chemical composition, tensile strength, yield strength, elongation, wall thickness, and Charpy V-notch impact value. All fusion-welded butt joints shall undergo radiographic examination, while hydrostatic testing of fittings is not required in this specification. Repair welding shall be permissible for parts made to dimensional standards.
SCOPE
1.1 This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction, covered by the latest revision of ASME B16.9, ASME B16.11, MSS SP-79, MSS SP-83, MSS SP-95, and MSS SP-97. Fittings differing from these ASME and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A960/A960M. These fittings are for use in pressure piping and pressure vessel service at low temperatures.
1.2 Optional supplementary requirements are provided for fittings where a greater degree of examination is desired. When desired, one or more of these supplementary requirements shall be specified in the order.
1.3 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.
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.
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Designation: A420/A420M – 10
Standard Specification for
Piping Fittings of Wrought Carbon Steel and Alloy Steel for
1
Low-Temperature Service
This standard is issued under the fixed designationA420/A420M; 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* A370 Test Methods and Definitions for Mechanical Testing
2
of Steel Products
1.1 This specification covers wrought carbon steel and
A960/A960M Specification for Common Requirements for
alloy steel fittings of seamless and welded construction, cov-
Wrought Steel Piping Fittings
ered by the latest revision of ASME B 16.9, ASME B 16.11,
2.3 ASME Standards:
MSS SP-79, MSS SP-83, MSS SP-95, and MSS SP-97.
4
B 16.9 Factory-Made Wrought Steel Butt-Welding Fittings
Fittings differing from these ASME and MSS standards shall
4
B 16.11 Forged Steel Fittings, Socket-Welding Threaded
be furnished in accordance with Supplementary Requirement
4
Section VIII Division 1, Pressure Vessels
S58 of SpecificationA960/A960M.These fittings are for use in
Section IX Welding Qualifications
pressure piping and pressure vessel service at low tempera-
2.4 MSS Standards:
tures.
MSS SP-25 Standard Marking System for Valves, Fittings,
1.2 Optional supplementary requirements are provided for
5
Flanges, and Unions
fittings where a greater degree of examination is desired.When
5
MSS SP-79 Socket Welding Reducer Inserts
desired,oneormoreofthesesupplementaryrequirementsshall
MSS SP-83 Steel Pipe Unions, Socket-Welding and
be specified in the order.
5
Threaded
1.3 This specification is expressed in both inch-pound units
5
MSS SP-95 Swage(d) Nipples and Bull Plugs
and in SI units. However, unless the order specifies the
MSS SP-97 Integrally Reinforced Forged Branch Outlet
applicable “M” specification designation (SI units), the mate-
Fittings—Socket Welding, Threaded and Buttwelding
rial shall be furnished to inch-pound units.
Ends
1.4 The values stated in either SI units or inch-pound units
2.5 ASNT Standards:
are to be regarded separately as standard. Within the text, the
SNT-TC-1A Recommended Practice for Nondestructive
SI units are shown in brackets. The values stated in each
6
Testing Personnel Qualification and Certification
system may not be exact equivalents; therefore, each system
shall be used independently of the other. Combining values
3. Ordering Information
from the two systems may result in non-conformance with the
3.1 See Specification A960/A960M.
standard.
4. General Requirements
2. Referenced Documents
4.1 Product furnished to this specification shall conform to
2.1 In addition to those Referenced Documents listed in
the requirements of SpecificationA960/A960M, including any
Specification A960/A960M, the following list of standards
supplementary requirements that are indicated in the purchase
apply to this specification.
3 order. Failure to comply with the general requirements of
2.2 ASTM Standards:
Specification A960/A960M constitutes non-conformance with
this specification. In case of conflict between the requirements
1 of this specification and Specification A960/A960M, this
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
specification shall prevail.
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.22 on Steel Forgings and Wrought Fittings for PipingApplications and Bolting
Materials for Piping and Special Purpose Applications.
Current edition approved May 1, 2010. Published June 2010. Originally
4
approved in 1958. Last previous edition approved in 2007 as A420/A420M–07. Available from American Society of Mechanical Engineers (ASME), ASME
DOI: 10.1520/A0420_A0420M-10. International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
2
For ASME Boiler and Pressure Vessel Code applications see related Specifi- www.asme.org.
5
cation SA-420 in Section II of that Code. AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http://www.mss-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM hq.com.
6
Standards volume information, refer to the standard’s Document Summary page on AvailablefromAmericanSocietyforNondestructiveTesting(ASNT),P.O.Box
the ASTM website. 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http://www.asnt.org.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:A420/A420M–07 Designation: A420/A420M – 10
Standard Specification for
Piping Fittings of Wrought Carbon Steel and Alloy Steel for
1
Low-Temperature Service
This standard is issued under the fixed designationA420/A420M; 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*
2
1.1 This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction, covered by the
latest revision ofASME B16.9,ASME B16.11, MSS-SP-79, MSS-SP-83, and MSS-SP-95, MSS SP-79, MSS SP-83, MSS SP-95,
and MSS SP-97. Fittings differing from these ASME and MSS standards shall be furnished in accordance with Supplementary
Requirement S58 of Specification A960/A960M. These fittings are for use in pressure piping and pressure vessel service at low
temperatures.
1.2 Optional supplementary requirements are provided for fittings where a greater degree of examination is desired. When
desired, one or more of these supplementary requirements shall be specified in the order.
1.3 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable
“M” specification designation (SI units), the material shall be furnished to inch-pound units.
1.4 The values stated in either inch-poundSI units or SIinch-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 aremay not be exact equivalents; therefore, each system
mustshall be used independently of the other. Combining values from the two systems may result in non-conformance with the
standard.
2. Referenced Documents
2.1 In addition to those Referenced Documents listed in SpecificationA960/A960M, the following list of standards apply to this
specification.
3
2.2 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A960/A960M Specification for Common Requirements for Wrought Steel Piping Fittings
2.3 ASME Standards:
4
B 16.9 Factory-Made Wrought Steel Butt-Welding Fittings
4
B 16.11 Forged Steel Fittings, Socket-Welding Threaded
4
Section VIII Division 1, Pressure Vessels
Section IX Welding Qualifications
2.4 MSS Standards:
5
MSS-SP-25MSS SP-25 Standard Marking System for Valves, Fittings, Flanges, and Unions
5
MSS-SP-79MSS SP-79 Socket Welding Reducer Inserts
5
MSS-SP-83MSS SP-83 Steel Pipe Unions, Socket-Welding and Threaded
5
MSS-SP-95Swage(d) Nipples and Bull Plugs
5
2.5 MSS SP-95 Swage(d) Nipples and Bull Plugs
MSS SP-97 Integrally Reinforced Forged Branch Outlet Fittings—Socket Welding, Threaded and Buttwelding Ends
2.5 ASNT Standards:
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.22
on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications.
Current edition approved MarchMay 1, 2007.2010. Published April 2007.June 2010. Originally approved in 1958. Last previous edition approved in 20062007 as
A420/A420M–06.A420/A420M–07. DOI: 10.1520/A0420_A0420M-107.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-420 in Section II of that Code.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
www.asme.org.
5
Available from Manufacturers Standardization Society of the Valve and Fittings Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http://www.mss-hq.com.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
A420/A420M – 10
6
SNT-TC-1A Recommended Practice for Nondestructive Testing Personnel Qualification and Certification
3. Ordering Information
3.1 See Specification A960/A960M.
4. General Requirements
4.1 Product furnished to this specification shall conform to the requi
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:A420/A420M–07 Designation: A420/A420M – 10
Standard Specification for
Piping Fittings of Wrought Carbon Steel and Alloy Steel for
1
Low-Temperature Service
This standard is issued under the fixed designationA420/A420M; 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*
2
1.1 This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction, covered by the
latest revision ofASME B16.9,ASME B16.11, MSS-SP-79, MSS-SP-83, and MSS-SP-95, MSS SP-79, MSS SP-83, MSS SP-95,
and MSS SP-97. Fittings differing from these ASME and MSS standards shall be furnished in accordance with Supplementary
Requirement S58 of Specification A960/A960M. These fittings are for use in pressure piping and pressure vessel service at low
temperatures.
1.2 Optional supplementary requirements are provided for fittings where a greater degree of examination is desired. When
desired, one or more of these supplementary requirements shall be specified in the order.
1.3 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable
“M” specification designation (SI units), the material shall be furnished to inch-pound units.
1.4 The values stated in either inch-poundSI units or SIinch-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 aremay not be exact equivalents; therefore, each system
mustshall be used independently of the other. Combining values from the two systems may result in non-conformance with the
standard.
2. Referenced Documents
2.1 In addition to those Referenced Documents listed in SpecificationA960/A960M, the following list of standards apply to this
specification.
3
2.2 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A960/A960M Specification for Common Requirements for Wrought Steel Piping Fittings
2.3 ASME Standards:
4
B 16.9 Factory-Made Wrought Steel Butt-Welding Fittings
4
B 16.11 Forged Steel Fittings, Socket-Welding Threaded
4
Section VIII Division 1, Pressure Vessels
Section IX Welding Qualifications
2.4 MSS Standards:
5
MSS-SP-25MSS SP-25 Standard Marking System for Valves, Fittings, Flanges, and Unions
5
MSS-SP-79MSS SP-79 Socket Welding Reducer Inserts
5
MSS-SP-83MSS SP-83 Steel Pipe Unions, Socket-Welding and Threaded
5
MSS-SP-95Swage(d) Nipples and Bull Plugs
5
2.5 MSS SP-95 Swage(d) Nipples and Bull Plugs
MSS SP-97 Integrally Reinforced Forged Branch Outlet Fittings—Socket Welding, Threaded and Buttwelding Ends
2.5 ASNT Standards:
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.22
on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications.
Current edition approved MarchMay 1, 2007.2010. Published April 2007.June 2010. Originally approved in 1958. Last previous edition approved in 20062007 as
A420/A420M–06.A420/A420M–07. DOI: 10.1520/A0420_A0420M-107.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-420 in Section II of that Code.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
www.asme.org.
5
Available from Manufacturers Standardization Society of the Valve and Fittings Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http://www.mss-hq.com.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
A420/A420M – 10
6
SNT-TC-1A Recommended Practice for Nondestructive Testing Personnel Qualification and Certification
3. Ordering Information
3.1 See Specification A960/A960M.
4. General Requirements
4.1 Product furnished to this specification shall conform to the requi
...
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