ASTM A234/A234M-14
(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 specification2 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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Designation:A234/A234M −14 Usedin USDOE-NE Standards
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 U.S. Department of Defense.
1. Scope* 2. Referenced Documents
2
1.1 This specification covers wrought carbon steel and 2.1 In addition to those reference documents listed in
alloysteelfittingsofseamlessandweldedconstructioncovered Specification A960/A960M, the following list of standards
by the latest revision of ASME B16.9, B16.11, MSS-SP-79, apply to this specification.
3
MSS-SP-83, MSS-SP-95, and MSS-SP-97. These fittings are
2.2 ASTM Standards:
for use in pressure piping and in pressure vessel fabrication for
A216/A216M SpecificationforSteelCastings,Carbon,Suit-
service at moderate and elevated temperatures. Fittings differ-
able for Fusion Welding, for High-Temperature Service
ing from theseASME and MSS standards shall be furnished in
A217/A217M Specification for Steel Castings, Martensitic
accordance with Supplementary Requirement S58 of Specifi-
Stainless and Alloy, for Pressure-Containing Parts, Suit-
cation A960/A960M.
able for High-Temperature Service
A960/A960M Specification for Common Requirements for
1.2 Optional supplementary requirements are provided for
fittingswhereagreaterdegreeofexaminationisdesired.When Wrought Steel Piping Fittings
4
2.3 ASME Standards:
desired, one or more of these supplementary requirements may
be specified in the order. B16.9 Steel Butt-Welding Fittings
B16.11 Forged Steel Fittings, Socket Welding and Threaded
1.3 This specification does not cover cast welding fittings or
4
2.4 ASME Boiler and Pressure Vessel Code:
fittings machined from castings. Cast steel welding fittings are
Section V
governed by Specifications A216/A216M and A217/A217M.
Section VIII, Division 1
1.4 This specification is expressed in both inch-pound units
Section IX
5
and in SI units. However, unless the order specifies the
2.5 MSS Standards:
applicable “M” specification designation (SI units), the mate-
MSS-SP-25 Standard Marking System for Valves, Fittings,
rial shall be furnished to inch-pound units.
Flanges, and Unions
MSS-SP-79 Socket Welding Reducer Inserts
1.5 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. Within the text, the MSS-SP-83 Steel Pipe Unions, Socket-Welding and
Threaded
SI units are shown in brackets. The values stated in each
system may not be exact equivalents; therefore, each system MSS-SP-95 Swage(d) Nipples and Bull Plugs
MSS-SP-97 Integrally Reinforced Forged Branch Outlet
shall be used independently of the other. Combining values
from the two systems may result in non-conformance with the Fittings—Socket Welding, Threaded and Buttwelding
Ends
standard.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel, contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee Standards volume information, refer to the standard’s Document Summary page on
A01.22 on Steel Forgings andWrought Fittings for PipingApplications and Bolting the ASTM website.
4
Materials for Piping and Special Purpose Applications. Available from American Society of Mechanical Engineers (ASME), ASME
Current edition approved Oct. 1, 2014. Published October 2014. Originally International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
ε1
approved in 1940. Last previous edition approved in 2013 as A234/A234M–13 . www.asme.org.
5
DOI: 10.1520/A0234_A0234M-14. AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
2
For ASME Boiler and Pressure Vessel Code applications see related Specifi- Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http://www.mss-
cation SA-234 in Section II of that Code. 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
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---------------------- Page: 1 ----------------------
A234/A234M−14
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2.6 ASNT Standard: or magnetic particle in accordance with S52 or S53 in
SNT-TC-1A Recommended Practice for Nondestructive Specification A960/A960M.
Testing Personnel Qualification and Certification
6.3 All welds including welds in tubular products from
...
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.
´1
Designation: A234/A234M − 13 A234/A234M − 14 Used in USDOE-NE Standards
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 designation A234/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 U.S. Department of Defense.
1
ε NOTE—Table 2 editorially corrected in January 2014.
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 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.
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
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
Section VIII, Division 1
Section IX
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.22
on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications.
Current edition approved Oct. 1, 2013Oct. 1, 2014. Published October 2013October 2014. Originally approved in 1940. Last previous edition approved in 20112013 as
ε1
A234/A234M–11a.–13 . DOI: 10.1520/A0234_A0234M-13E01.10.1520/A0234_A0234M-14.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-234 in Section II of that Code.
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 the ASTM website.
4
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
www.asme.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: 1 ----------------------
A234/A234M − 14
5
2.5 MSS Standards:
MSS-SP-25 Standard Marking System for Valves, Fittings, Flanges, and Unions
MSS-SP-79 Socket Welding Reducer Inserts
MSS-SP-83 Steel Pipe Unions, Socket-Welding and Threaded
MSS-SP-95 Swage(d) Nipples and Bull Plugs
MSS-SP-97 Integrally Reinforced Forged Branch Outlet Fittings—Socket Welding, T
...
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