Standard Speciﬁcation for Aluminum and Aluminum-Alloy Seamless Pipe and Seamless Extruded Tube for Gas and Oil Transmission and Distribution Piping Systems1
This widespread is issued below the ﬁxed designation b 345/b 345m; the variety straight away following the designation shows the year of authentic adoption or, in the case of revision, the 12 months of final revision. A range of in parentheses suggests the 12 months of final reapproval. A superscript epsilon (e) indicates an editorial change for the reason that remaining revision or reapproval.
This trendy has been permitted to be used through groups of the branch of defense.
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