What does WC and WP stands for in ASTM specs

[vesselguy]

I googled this question and cannot find a definitive defintion so I'm trying here.

In ASTM standards such as A216 and A234, what does the WC and WP stands for? Is there an ASTM document that tells us exactly what the meaning for these?

W = Wrought or weldable?
P = pipe?
C = carbon or casting?????

damn TLA

 

[metengr]

vesselguy;
This has been asked before, so you might want to try a search.

WC - weldable cast product
WP - weldable pipe product