Structural formation:BB-BG-OS&Y Driving ;Hand-operated Design standard:ASME B 16.34and BS 1873 Face to face: ASME B 16.10 Flanged ends: ASME B 16.5 Test & inspection: API 598 (1)Body:ASTMA216WCB ASTM A217-WC1、WC6、WC9.C5 ASTM A351-CF8、CF8M、CF8C、CF3、CF3M (2)Disc:ASTM A182 Gr.F6a、ASTM A182 F22 ASTM A182-F304、F316、F321、F304L、F316L (3)Stem :ASTM A182 Gr.F6a.ASTMA182 F22 ASTM A182-F304、F316、F321、F304L、F316L