Blind Flange 6",Carbon Steel 1.from 1/2'' to 24'' ... ;welding nece flange;socket welding flange;threaded flange;lapped flange;blind ;spectacle blind,etc.Size RangeFrom ½” up to 60” ScheduleSCH STD, XS ... /316L, F321, F347, 5 Duplex$super duplex stainless steel ASTM A 182 F51/UNS S31803, F53/UNS S32F50, F55/UNS S32F60 ... , Vetnam, Brazil, Indonesia, Thailand, UAE, act ANSI16.5 A234 WPB Blind flanges