1. Rationale
A user has requested addition of grade 92 to A234 as WP92. Since the material is already included in A182, A213, and A335, no data package is required. This action accommodates that request. Another user questioned the apparent incompatible limits on Cr (0.40%). Mo (0.15%), and Cr + Mo (Note F, 0.32%) limits for WPB and WPC in Table 1. A234 may be made from pipe or plate materials, such as A106 or A516. The Cr and Mo maximums of 0.40% and 0.15% in A234 are the same as the limits for these elements in A106; while the 0.32% max limit for Cr + Mo in A234 is more conservative than the sum of the maximums for Cr (0.30%) and Mo (0.12%) in Table 1 of A20, which applies to A516 and other carbon steel plate for pressure vessels. This action deletes Note F, to preserve the compatibility with the requirements of A106 and A20. Also, this action deletes the word, max, from the tabular entries in Table 1 because of the redundancy with Note 1 of the table; it adds the weld chemistry limits for WP911 to be the same as those for T911 in A213; and it adds WP911 to Table A1.1, because inclusion of A911 in that table had apparently been overlooked, previously.
Keywords
pipe fittingssteel; piping applications; pressure containing parts; pressure vessel service; temperature service applicationselevated; Alloy steel fittings--specifications; Carbon steel pipe fittings--specifications; Elevated temperature service applications--steel; Steel fittings--specifications; Wrought steel fittings--specifications;
Citing ASTM Standards
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