Standard Speciﬁcation for Gray Iron Castings for Pressure-Containing Parts for Temperatures Up to 650°F (350°C)1
This standard is issued underneath the ﬁxed designation a 278/a 278m; the quantity right now following the designation shows the year of original adoption or, in the case of revision, the year of last revision. various in parentheses indicates the year of final reapproval. a superscript epsilon (e) shows a piece of writing alternate for the reason that ultimate revision or reapproval.
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