... ''_80'' standard:ASME material: alloy steel qualification: ISO9001, API A694 F65 Plate Flanges 1/2" to 24" ASME B16.526"to ... , A484, Alloy steel(ASTM A694 F42,F46,F52,F56,F60,F65,F70, A182 F12,F11,F22,F5,F9,F91,F1ECT)qualificationISO9001 ... , construction, etcSpecial design available as the requirement of customer A694 F65 Plate Flanges