Standard Specification for
Centrifugally Cast Austenitic Steel Pipe for High-
This fashionable is issued beneath the fixed designation a 451/a 451m; the wide variety straight away following the designation shows the 12 months
of original adoption or, inside the case of revision, the year of remaining revision. various in parentheses suggests the year of final reapproval.
a superscript epsilon (e) shows an editorial exchange for the reason that final revision or reapproval.
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