ASTM A234/A234M-11
(Specification)Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service
Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service
ABSTRACT
This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction. These fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures. The material for fittings shall consist of killed steel, forgings, bars, plates, seamless or fusion-welded tubular products with filler metal added. Forging or shaping operations may be performed by hammering, pressing, piercing, extruding, upsetting, rolling, bending, fusion welding, machining, or by a combination of two or more of these operations. The forming procedure shall be so applied that it will not produce injurious imperfections in the fittings. Fittings, after forming at an elevated temperature, shall be cooled to a temperature below the critical range under suitable conditions to prevent injurious defects caused by too rapid cooling, but in no case more rapidly than the cooling rate in still air. The fittings shall be subjected to tension test, hardness test, and hydrostatic test.
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, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, and MSS-SP-97. These fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures. Fittings differing from these ASME and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A960/A960M.
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 may be specified in the order.
1.3 This specification does not cover cast welding fittings or fittings machined from castings. Cast steel welding fittings are governed by Specifications A216/A216M and A217/A217M.
1.4 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.
1.5 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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Used in USDOE-NE Standards
Designation: A234/A234M – 11
Standard Specification for
Piping Fittings of Wrought Carbon Steel and Alloy Steel for
1
Moderate and High Temperature Service
This standard is issued under the fixed designationA234/A234M; 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.
This standard has been approved for use by agencies of the Department of Defense.
3
1. Scope* 2.2 ASTM Standards:
2 A216/A216M Specification for Steel Castings, Carbon,
1.1 This specification covers wrought carbon steel and
Suitable for Fusion Welding, for High-Temperature Ser-
alloysteelfittingsofseamlessandweldedconstructioncovered
vice
by the latest revision of ASME B16.9, B16.11, MSS-SP-79,
A217/A217M Specification for Steel Castings, Martensitic
MSS-SP-83, MSS-SP-95, and MSS-SP-97. These fittings are
Stainless and Alloy, for Pressure-Containing Parts, Suit-
for use in pressure piping and in pressure vessel fabrication for
able for High-Temperature Service
service at moderate and elevated temperatures. Fittings differ-
A370 Test Methods and Definitions for Mechanical Testing
ing from theseASME and MSS standards shall be furnished in
of Steel Products
accordance with Supplementary Requirement S58 of Specifi-
A960/A960M Specification for Common Requirements for
cation A960/A960M.
Wrought Steel Piping Fittings
1.2 Optional supplementary requirements are provided for
4
2.3 ASME Standards:
fittingswhereagreaterdegreeofexaminationisdesired.When
B16.9 Steel Butt-Welding Fittings
desired, one or more of these supplementary requirements may
B16.11 Forged Steel Fittings, SocketWelding andThreaded
be specified in the order.
4
2.4 ASME Boiler and Pressure Vessel Code:
1.3 This specification does not cover cast welding fittings or
Section V Nondestructive Examination
fittings machined from castings. Cast steel welding fittings are
Section VIII, Division 1, Pressure Vessels
governed by Specifications A216/A216M and A217/A217M.
Section IX Welding Qualifications
1.4 This specification is expressed in both inch-pound units
5
2.5 MSS Standards:
and in SI units. However, unless the order specifies the
MSS-SP-25 Standard Marking System for Valves, Fittings,
applicable “M” specification designation (SI units), the mate-
Flanges, and Unions
rial shall be furnished to inch-pound units.
MSS-SP-79 Socket Welding Reducer Inserts
1.5 The values stated in either SI units or inch-pound units
MSS-SP-83 Steel Pipe Unions, Socket-Welding and
are to be regarded separately as standard. Within the text, the
Threaded
SI units are shown in brackets. The values stated in each
MSS-SP-95 Swage(d) Nipples and Bull Plugs
system may not be exact equivalents; therefore, each system
MSS-SP-97 Integrally Reinforced Forged Branch Outlet
shall be used independently of the other. Combining values
Fittings—Socket Welding, Threaded and Buttwelding
from the two systems may result in non-conformance with the
Ends
standard.
6
2.6 ASNT Standard:
2. Referenced Documents
SNT-TC-1A Recommended Practice for Nondestructive
Testing Personnel Qualification and Certification
2.1 In addition to those reference documents listed in
Specification A960/A960M, the following list of standards
apply to this specification.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, the ASTM website.
4
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee Available from American Society of Mechanical Engineers (ASME), ASME
A01.22 on Steel Forgings andWrought Fittings for PipingApplications and Bolting International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
Materials for Piping and Special Purpose Applications. www.asme.org.
5
Current edition approved April 1, 2011. Published April 2011. Originally AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
approved in 1940. Last previous edition approved in 2010 as A234/A234M–10b. Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http://www.mss-
DOI: 10.1520/A0234_A0234M-11. hq.com.
2 6
For ASME Boiler and Pressure Vessel Code applications see related Specifi- AvailablefromAmericanSocietyforNondestructiveTesting(ASNT),P.O.Box
cation SA-234 in Section II of that Code. 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 Bar
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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.
Used in USDOE-NE Standards
Designation:A234/A234M–10b Designation: A234/A234M – 11
Standard Specification for
Piping Fittings of Wrought Carbon Steel and Alloy Steel for
1
Moderate and High Temperature Service
This standard is issued under the fixed designationA234/A234M; 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.
This standard has been approved for use by agencies of the Department of Defense.
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 of ASME B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, and MSS-SP-97. These fittings are for use in
pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures. Fittings differing from these
ASME and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of SpecificationA960/A960M.
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 may be specified in the order.
1.3 This specification does not cover cast welding fittings or fittings machined from castings. Cast steel welding fittings are
governed by Specifications A216/A216M and A217/A217M.
1.4 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.
1.5 ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunits
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.
2. Referenced Documents
2.1 In addition to those reference documents listed in Specification A960/A960M, the following list of standards apply to this
specification.
3
2.2 ASTM Standards:
A216/A216M Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Service
A217/A217M Specification for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts, Suitable for
High-Temperature Service
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A960/A960M Specification for Common Requirements for Wrought Steel Piping Fittings
4
2.3 ASME Standards:
B16.9 Steel Butt-Welding Fittings
B16.11 Forged Steel Fittings, Socket Welding and Threaded
4
2.4 ASME Boiler and Pressure Vessel Code:
Section V Nondestructive Examination
Section VIII, Division 1, Pressure Vessels
Section IX Welding Qualifications
5
2.5 MSS Standards:
MSS-SP-25 Standard Marking System for Valves, Fittings, Flanges, and Unions
MSS-SP-79 Socket Welding Reducer Inserts
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 Dec.April 1, 2010.2011. Published JanuaryApril 2011. Originally approved in 1940. Last previous edition approved in 2010 as
A234/A234M–10ab. DOI: 10.1520/A0234_A0234M-10b1.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-234 in Section II of that Code.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
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 ----------------------
A234/A234M – 11
MSS
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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.
Used in USDOE-NE Standards
Designation:A234/A234M–10b Designation: A234/A234M – 11
Standard Specification for
Piping Fittings of Wrought Carbon Steel and Alloy Steel for
1
Moderate and High Temperature Service
This standard is issued under the fixed designationA234/A234M; 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.
This standard has been approved for use by agencies of the Department of Defense.
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 of ASME B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, and MSS-SP-97. These fittings are for use in
pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures. Fittings differing from these
ASME and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of SpecificationA960/A960M.
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 may be specified in the order.
1.3 This specification does not cover cast welding fittings or fittings machined from castings. Cast steel welding fittings are
governed by Specifications A216/A216M and A217/A217M.
1.4 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.
1.5 ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunits
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.
2. Referenced Documents
2.1 In addition to those reference documents listed in Specification A960/A960M, the following list of standards apply to this
specification.
3
2.2 ASTM Standards:
A216/A216M Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Service
A217/A217M Specification for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts, Suitable for
High-Temperature Service
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A960/A960M Specification for Common Requirements for Wrought Steel Piping Fittings
4
2.3 ASME Standards:
B16.9 Steel Butt-Welding Fittings
B16.11 Forged Steel Fittings, Socket Welding and Threaded
4
2.4 ASME Boiler and Pressure Vessel Code:
Section V Nondestructive Examination
Section VIII, Division 1, Pressure Vessels
Section IX Welding Qualifications
5
2.5 MSS Standards:
MSS-SP-25 Standard Marking System for Valves, Fittings, Flanges, and Unions
MSS-SP-79 Socket Welding Reducer Inserts
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 Dec.April 1, 2010.2011. Published JanuaryApril 2011. Originally approved in 1940. Last previous edition approved in 2010 as
A234/A234M–10ab. DOI: 10.1520/A0234_A0234M-10b1.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-234 in Section II of that Code.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
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 ----------------------
A234/A234M – 11
MSS
...
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