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ASTM A234/A234M-24

Current Revision

Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service

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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.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


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.


SDO ASTM: ASTM International
Document Number A234
Publication Date April 1, 2024
Language en - English
Page Count 10
Revision Level 24
Supercedes
Committee A01.22
Publish Date Document Id Type View
April 1, 2024 A0234_A0234M-24 Revision
May 1, 2023 A0234_A0234M-23A Revision
March 1, 2023 A0234_A0234M-23 Revision
Nov. 1, 2022 A0234_A0234M-22 Revision
Nov. 1, 2019 A0234_A0234M-19 Revision
Sept. 1, 2018 A0234_A0234M-18A Revision
March 1, 2018 A0234_A0234M-18 Revision
May 15, 2017 A0234_A0234M-17 Revision
Dec. 1, 2016 A0234_A0234M-16 Revision
Sept. 1, 2015 A0234_A0234M-15 Revision
Oct. 1, 2014 A0234_A0234M-14 Revision
Oct. 1, 2013 A0234_A0234M-13E01 Revision
Oct. 1, 2013 A0234_A0234M-13 Revision
Nov. 1, 2011 A0234_A0234M-11A Revision
April 1, 2011 A0234_A0234M-11 Revision
Dec. 1, 2010 A0234_A0234M-10B Revision
Oct. 1, 2010 A0234_A0234M-10A Revision
May 1, 2010 A0234_A0234M-10 Revision
March 1, 2007 A0234_A0234M-07 Revision
Sept. 1, 2006 A0234_A0234M-06A Revision
May 1, 2006 A0234_A0234M-06 Revision
June 1, 2005 A0234_A0234M-05A Revision
March 1, 2005 A0234_A0234M-05 Revision
May 1, 2004 A0234_A0234M-04 Revision
Oct. 1, 2003 A0234_A0234M-03 Revision
June 10, 2002 A0234_A0234M-02 Revision
Dec. 10, 2001 A0234_A0234M-01A Revision
Dec. 10, 2001 A0234_A0234M-01 Revision
Dec. 10, 2001 A0234_A0234M-00A Revision
Dec. 10, 2001 A0234_A0234M-00 Revision
Not Available A0234_A0234M-97 Revision