Pipe Fittings, Flanges, Valves manufacturer / supplier in China, offering As4087/Table D/Table E Galvanised/Stainless Steel Backing Rings Flanges of Forged, Forged Steel Pipe Flanges of Stainless Steel ASTM A182 F304 F304L F316 F316L F321, ANSI B16.5 Class 150 Alloy Steel Raised Face Flat Face Reducing Flange Forged Plain Plate Flange and so on.