Standard Speciﬁcation for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless1
This trendy is issued below the ﬁxed designation a 53/a 53m; the quantity right now following the designation shows the year of authentic adoption or, inside the case of revision, the yr of final revision. quite a number in parentheses indicates the yr of last reapproval. a superscript epsilon (e) indicates an article exchange since the ultimate revision or reapproval.
this widespread has been accredited to be used by means of agencies of the department of defense.
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