ASME B16.11-2016 pdf download.Forged Fittings,Socket-Weldingand Threaded. (c) Product Conformance. Fittings covered under para. 1.1.1 shall be marked with either the ASTM Fittings Specification material identification (e.g., WP 9 or the symbol “816 “to denote conformance to this Standard. Fittings covered under para. 1.1.2 shall be marked with a supplementary suffix as follows: (1) For ASTM A234, A403, A420, and A815,...