Pipe Fitting, Flange, Valve manufacturer / supplier in China, offering BS 1560/3293/4504 A182 F11/F12 Carbon Steel Welding Neck RF Flange, AISI 2129 F316/ F316L/F316ti Duplex Steel Flange Bridas, JIS B2220 Gr 3 Titanium Blind Flange and so on.