... size: 1/2''_80'' standard:ANSI material :alloy qualification: 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 ... S31803, A182, F43, A276 S32750,A705 631,632,A961, A484, Alloy steel(ASTM A694 F42,F46,F52,F56,F60,F65,F70 ...