high pressure alloy flange ANSI B16.5 A105 size: 1/2''_80'' standard:ANSI material : ... ISO9001, API high pressure alloy flange ANSI B16.5 A105 size: 1/2''_80'' standard:ANSI material :alloy ... qualification: ISO9001, APIhigh pressure alloy flange ANSI B16.5 A105 1/2" to 24" ASME B16.526"to ... ASME B16.36,DIN 86341-2000, materialCarbon steel(ASTM A105, Q235,A350LF2,A350LF3,)Stainless steel(ASTM A182 F304, ...