... size: from 1/2''_80'' standard:ASME material: stainless qualification: ISO9001 standard stainless steel flange asme 1/2" to 24" ASME B16.526 ... , ASME B16.36,DIN 86341-2000, materialCarbon steel(ASTM A105, Q235,A350LF2,A350LF3,)Stainless steel(ASTM A182 F304, F304L,F316,F316L,F321,F347 ... , papermaking, construction, etcSpecial design available as the requirement of customer stainless steel flanges