Blind Flange 6",Carbon Steel 1.from 1/2'' to 24'' 2.T/T,L/C 3.ISO 9001:2000, ... nece flange;socket welding flange;threaded flange;lapped flange;blind ;spectacle blind,etc.Size RangeFrom ½” up to 60” ScheduleSCH STD ... ASTM A182 F304/304L, F316/316L, F321, F347, 5 Duplex$super duplex stainless steel ASTM A 182 F51/UNS ... Poland, Vetnam, Brazil, Indonesia, Thailand, UAE, act ANSI16.5 A234 WPB Blind flanges