ASTM A858/A858M-06

    Standard Specification for Heat-Treated Carbon Steel Fittings for Low-Temperature and Corrosive Service

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    1. Scope

    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, ASME B16.28, MSS-SP-75, and MSS-SP-79. Fittings differing from these ASME and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A 960/A 960M. 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 inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. Combining values from the two systems may result in nonconformance with this specification. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. 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.

    ASTM Standards

    A960/A960M Specification for Common Requirements for Wrought Steel Piping Fittings

    ASME Standards

    B16.11 Forged Steel Fittings, Socket Welding and Threaded

    B16.9 Steel Butt-Welding Fittings

    MSS Standards

    MSSSP-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 Code

    ICS Number Code 23.040.40 (Metal fittings)

    UNSPSC Code

    UNSPSC Code 40170000(Pipe piping and pipe fittings)


    DOI: 10.1520/A0858_A0858M-06

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