ASTM A234/A234M-07
(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, and MSS-SP-95. 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 A 960/A 960M.
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 A 216/A 216M and A 217/A 217M.
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 inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
General Information
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Standards Content (Sample)
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Contact ASTM International (www.astm.org) for the latest information.
Used in USDOE-NE Standards
Designation: A234/A234M – 07
Standard Specification for
Piping Fittings of Wrought Carbon Steel and Alloy Steel for
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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.
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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, and MSS-SP-95. These fittings are for use in
Stainless and Alloy, for Pressure-Containing Parts, Suit-
pressure piping and in pressure vessel fabrication for service at
able for High-Temperature Service
moderate and elevated temperatures. Fittings differing from
A960/A960M Specification for Common Requirements for
these ASME and MSS standards shall be furnished in accor-
Wrought Steel Piping Fittings
dance with Supplementary Requirement S58 of Specification
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2.3 ASME Standards:
A960/A960M.
B16.9 Steel Butt-Welding Fittings
1.2 Optional supplementary requirements are provided for
B16.11 Forged Steel Fittings, SocketWelding andThreaded
fittingswhereagreaterdegreeofexaminationisdesired.When
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2.4 ASME Boiler and Pressure Vessel Code:
desired, one or more of these supplementary requirements may
Section V Nondestructive Examination
be specified in the order.
Section VIII, Division 1, Pressure Vessels
1.3 This specification does not cover cast welding fittings or
Section IX Welding Qualifications
fittings machined from castings. Cast steel welding fittings are
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2.5 MSS Standards:
governed by Specifications A216/A216M and A217/A217M.
MSS-SP-25 Standard Marking System for Valves, Fittings,
1.4 This specification is expressed in both inch-pound units
Flanges, and Unions
and in SI units. However, unless the order specifies the
MSS-SP-79 Socket Welding Reducer Inserts
applicable “M” specification designation (SI units), the mate-
MSS-SP-83 Steel Pipe Unions, Socket-Welding and
rial shall be furnished to inch-pound units.
Threaded
1.5 The values stated in either inch-pound units or SI units
MSS-SP-95 Swage(d) Nipples and Bull Plugs
are to be regarded separately as standard. Within the text, the
2.6 ASNT Standard:
SI units are shown in brackets. The values stated in each
SNT-TC-1A Recommended Practice for Nondestructive
system are not exact equivalents; therefore, each system must
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Testing Personnel Qualification and Certification
be used independently of the other. Combining values from the
two systems may result in nonconformance with the specifi-
3. Ordering Information
cation.
3.1 See Specification A960/A960M.
2. Referenced Documents
4. General Requirements
2.1 In addition to those reference documents listed in
4.1 Product furnished to this specification shall conform to
Specification A960/A960M, the following list of standards
the requirements of SpecificationA960/A960M, including any
apply to this specification.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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This specification is under the jurisdiction ofASTM CommitteeA01 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.
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Materials for Piping and Special Purpose Applications. Available from American Society of Mechanical Engineers (ASME), ASME
Current edition approved March 1, 2007. Published April 2007. Originally International Headquarters, Three Park Ave., New York, NY 10016-5990.
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approved in 1940. Last previous edition approved in 2006 as A234/A234M – 06a. AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
DOI: 10.1520/A0234_A0234M-07. Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602.
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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.
*A Summary of Changes section appears at the end of this standard.
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