... .ISO 9001:2000,SGS,BV,etc FLANGESProduction NameSlip-on welding flange;welding nece flange;socket welding flange;threaded flange;lapped flange;blind ;spectacle blind ... , F7, F9, F11, F12, F22, F913 SPECIAL ALLOYInconel 600, Inconel 625, Inconel 718, Inconel X750, Incoloy 800, Incoloy 800H, Incoloy 825 ... , Brazil, Indonesia, Thailand, UAE, act ANSI16.5 A234 WPB Blind flanges