... GOST12836-67,GOST12821-80,GOST12821-80 TypeWelding Neck Flanges, Slip on Flanges, Threaded Flanges, Socket Welding Flanges, Blind Flanges, ... 2 inch to 72 inch,including Elbow, bend, Tee and Cross, Concentric and Eccentric Reducer, Cap, Flange) according to ASME, ... Loose Hubbed Flange, Welding Plate Flange, Welding Neck Collar, Welding-On Collar, Loose Plate Flange, Companion Flange, Plate (PL) Flange ...