SUPERSEDED (click for Active standard)
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1.1 This specification covers heat-treated wrought carbon steel piping fittings with lowered carbon content of seamless and electric fusion-welded construction covered by the latest revisions in ASME B16.9, ASME B16.11, MSS SP-75, MSS SP-79, MSS SP-83, MSS SP-95, or MSS SP-97. Fittings differing from these ASME and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A960/A960M. These fittings are for use in pressure components where inherent notch toughness and optimum sulfide-cracking resistance are required, such as oil and gas industry piping and distribution systems.
1.2 Optional supplementary requirements are provided for fittings when a greater degree of examination is desired. One or more of the supplementary requirements may be specified in the order.
1.3 This specification does not cover cast-welding fittings or fittings machined from castings.
1.4 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. Unless the other specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A960/A960M Specification for Common Requirements for Wrought Steel Piping Fittings
ASME StandardsB16.11 Forged Steel Fittings, Socket Welding and Threaded B16.9 Steel Butt-Welding Fittings
MSS StandardsMSSSP-25 The Standard Marking System of Valves, Fittings, Flanges and Unions MSSSP-75 Specification for High Test Wrought Butt-Welding Fittings MSSSP-79 Socket Welding Reducer Inserts MSSSP-83 Steel Pipe Unions, Socket-Welding and Threaded MSSSP-95 Swage(d) Nipples and Bull Plugs MSSSP-97 Integrally Reinforced Forged Branch Outlet Fittings--Socket Welding, Threaded and Buttwelding Ends
ICS Number Code 23.040.40 (Metal fittings)
UNSPSC Code 40170000(Pipe piping and pipe fittings)
ASTM A858 / A858M-10a, Standard Specification for Heat-Treated Carbon Steel Fittings for Low-Temperature and Corrosive Service, ASTM International, West Conshohocken, PA, 2010, www.astm.orgBack to Top