... material:stainless steel standard:ANSI pressure:150#-2500# Welded flange PN16size1/2" - 24" ASME B16.525"- 60" ASME B16.47TypeWN, ... )Stainless steel (ASTM A182 F304, F304L,F316,F316L,F321, etc)Alloy steel (ASTM A694 A182 F12,F11,F22,F5,F9,F91 ... F70,etc)QualificationISO,API,CE/PED to euro,etc Welded flange PN16