ASTM A234/A234M-06a
(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
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, 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.
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Used in USDOE-NE Standards
Designation: A 234/A 234M – 06a
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 designationA 234/A 234M; 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 (e) 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 A 216/A 216M 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,
A 217/A 217M SpecificationforSteelCastings,Martensitic
and MSS SP-95. These fittings are for use in pressure piping
Stainless and Alloy, for Pressure-Containing Parts, Suit-
and in pressure vessel fabrication for service at moderate and
able for High-Temperature Service
elevated temperatures. Fittings differing from theseASME and
A 960/A 960M Specification for Common Requirements
MSS standards shall be furnished in accordance with Supple-
for Wrought Steel Piping Fittings
mentary Requirement S58 of Specification A 960/A 960M.
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2.3 ASME Standards:
1.2 Optional supplementary requirements are provided for
B16.9 Steel Butt-Welding Fittings
fittingswhereagreaterdegreeofexaminationisdesired.When
B16.11 Forged Steel Fittings, SocketWelding andThreaded
desired, one or more of these supplementary requirements may
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2.4 ASME Boiler and Pressure Vessel Code:
be specified in the order.
Section V Nondestructive Examination
1.3 This specification does not cover cast welding fittings or
Section VIII, Division 1, Pressure Vessels
fittings machined from castings. Cast steel welding fittings are
Section IX Welding Qualifications
governed by Specifications A 216/A 216M and A 217/
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2.5 MSS Standards:
A 217M.
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-95 Swage(d) Nipples and Bull Plugs
rial shall be furnished to inch-pound units.
2.6 ASNT Standard:
1.5 The values stated in either inch-pound units or SI units
SNT-TC-1A(1984) Recommended Practice for Nondestruc-
are to be regarded separately as standard. Within the text, the
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tive Testing Personnel Qualification and Certification
SI units are shown in brackets. The values stated in each
system are not exact equivalents; therefore, each system must
3. Ordering Information
be used independently of the other. Combining values from the
3.1 See Specification A 960/A 960M.
two systems may result in nonconformance with the specifi-
cation.
4. General Requirements
2. Referenced Documents 4.1 Product furnished to this specification shall conform to
the requirements of Specification A 960/A 960M, including
2.1 In addition to those reference documents listed in
any supplementary requirements that are indicated in the
Specification A 960/A 960M, the following list of standards
apply to this specification.
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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
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This specification is under the jurisdiction of ASTM Committee A01 on Steel, Standards volume information, refer to the standard’s Document Summary page on
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee the ASTM website.
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A01.22 on Steel Forgings andWrought Fittings for PipingApplications and Bolting Available from American Society of Mechanical Engineers (ASME), ASME
Materials for Piping and Special Purpose Applications. International Headquarters, Three Park Ave., New York, NY 10016-5990.
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Current edition approved Sept. 1, 2006. Published September 2006. Originally AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
approved in 1940. Last previous edition approved in 2006 as A 234/A 234M – 06. 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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