ASTM WK60960

    Revision of A335 / A335M - 15a Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

    (What is a Work Item?)

    Active Standard: A335 / A335M - 18

    Developed by Subcommittee: A01.10 | Committee A01 | Contact Staff Manager


    1. Rationale

    A335 has heat treatment requirements for Grade P91 that have resulted in inquiries indicating that clarification would be beneficial. This proposal makes clear that normalizing and tempering or quenching and tempering are both permitted, regardless of size or thickness and that there is no technical reason to require permission of the purchaser. This change has been made recently in A182 for F91. This revision also clarifies that where more than one heat treatment is listed for a Grade in Table 2, only one of these heat treatments need be performed.


    alloy steel pipe; high temperature service; seamless steel pipe; steel pipe; temperature service applications;;
    Citing ASTM Standards
    Back to Top
    Work Item Status

    Date Initiated:

    Technical Contact:
    Michael Gold


    A01 (18-01)

    Ballot Item Approved as A335/A335M-2018 and Pending Publication