... :Blind Flange(stainless blind flange,stainless steel flange)MaterialCarbon Steel:ASTM A105, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2ASTM A694 ... F304/304L, F316/316L, F316H, F310, F321F44 (UNS S31254)Alloy:ASTM A182 F1, F5a, F9, F11, F12, F22, F91 Blind Flange( ...