Standard Speciﬁcation for Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures1
This fashionable is issued underneath the ﬁxed designation a 691; the wide variety straight away following the designation suggests the 12 months of unique adoption or, in the case of revision, the 12 months of closing revision. A variety of in parentheses indicates the yr of remaining reapproval. A superscript epsilon (e) indicates an article trade because the final revision or reapproval.
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You can also get ASTM A 690 A 690M – 00a International standard