ASTM A376/A376M-12

    Standard Specification for Seamless Austenitic Steel Pipe for High-Temperature Central-Station Service

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    1. Scope

    1.1 This specification covers seamless austenitic steel pipe intended for high-temperature central-station service. Among the grades covered are H grades and nitrogen grades that are specifically intended for high-temperature service.

    1.2 Optional supplementary requirements (S1 through S10) are provided. These supplementary requirements specify additional tests that will be made only when stated in the order, together with the number of such tests required.

    1.3 Grades TP321 and TP321H have lower strength requirements for nominal wall thicknesses greater than 3/8 in. [9.5 mm].

    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. 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. The inch-pound units shall apply unless the M designation of this specification is specified in the order.

    Note 1—The dimensionless designators NPS (nominal pipe size) and DN (Diametre Nominel) have 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.

    ASTM Standards

    A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels

    A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe

    E112 Test Methods for Determining Average Grain Size

    E213 Practice for Ultrasonic Testing of Metal Pipe and Tubing

    E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings

    E426 Practice for Electromagnetic (Eddy-Current) Examination of Seamless and Welded Tubular Products, Titanium, Austenitic Stainless Steel and Similar Alloys


    ICS Code

    ICS Number Code 23.040.10 (Iron and steel pipes)

    UNSPSC Code

    UNSPSC Code 40171622(Industrial seamless stainless steel pipe)


    DOI: 10.1520/A0376_A0376M-12

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