Steel Pipes, Flange, Pipe Spool manufacturer / supplier in China, offering Stainless Steel 304 316 Pn10 Pn16 Casting Forged Round Base Plate Full Flat Flange for Pipework, Flanges for Butterfly Valve Flanges Carbon Steel Flanges Forging Welding Flat Welded, Wn Flange Alloy Steel A335 A234 150# Std Black Painted Weld Neck Flange and so on.