... B16.47, ASME B16.36,DIN2505,EtcMaterialCarbon steel(ASTM A105,Q235,A350LF2,A350LF3,Etc)Stainless steel(ASTM A182 F304, F304L,F316,F316L,F321 ... , etcSpecial design available as the requirement of customer Slip On Flange Blind FlangeWelding Neck Flange ISO certificate stainless steel flange (supplier)