ASTM A105/A105M-03

    Standard Specification for Carbon Steel Forgings for Piping Applications

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    1. Scope

    1.1 This specification covers forged carbon steel piping components for ambient- and higher-temperature service in pressure systems. Included are flanges, fittings, valves, and similar parts ordered either to dimensions specified by the purchaser or to dimensional standards such as the ASME and API specifications referenced in Section . Forgings made to this specification are limited to a maximum weight of 10000 lb [4540 kg]. Larger forgings may be ordered to Specification A 266/A 266M. Tubesheets and hollow cylindrical forgings for pressure vessel shells are not included within the scope of this specification. Although this specification covers some piping components machined from rolled bar and seamless tubular products (see ), it does not cover raw material produced in these product forms.

    1.2 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.

    1.3 Specification A 266/A 266M covers other steel forgings and Specifications A 675 and A 696 cover other steel bars.

    1.4 This specification is expressed in both inch-pound units and 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 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.

    Note 1—The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as "nominal diameter," "size," and "nominal size."


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASME Standards

    B16.10 Face-to-Face and End-to-End Dimensions of Ferrous Valves

    B16.11 Forged Steel Fittings, Socket Weld, and Threaded

    B16.34 Valves-Flanged, Threaded and Welding End

    B16.47 Large Diameter Steel Flanges

    B16.5 Dimensional Standards for Steel Pipe Flanges and Flanged Fittings Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http://www.asme.org.

    B16.9 Wrought Steel Buttwelding Fittings

    ASTM Standards

    A266/A266M Specification for Carbon Steel Forgings for Pressure Vessel Components

    A675/A675M Specification for Steel Bars, Carbon, Hot-Wrought, Special Quality, Mechanical Properties

    A696 Specification for Steel Bars, Carbon, Hot-Wrought or Cold-Finished, Special Quality, for Pressure Piping Components

    A788/A788M Specification for Steel Forgings, General Requirements

    A961/A961M Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications

    ASME Boiler and Pressure Vessel Code

    SectionIX Welding Qualifications

    API Standards

    API-600 Flanged and Butt-Welding-End Steel Gate Valves Available from American Petroleum Institute (API), 1220 L. St., NW, Washington, DC 20005-4070, http://www.api.org.

    API-602 Compact Design Carbon Steel Gate Valves for Refinery Use


    ICS Code

    ICS Number Code 77.140.85 (Iron and steel forgings)

    UNSPSC Code

    UNSPSC Code 31132100(Steel forgings)


    DOI: 10.1520/A0105_A0105M-03

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