Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering ASTM A179/A179m Seamless Colddrawn Lowcarbon Steel Tubes for Tubular Heat Exchanger, Copper Nickel 90/10 Flange/Tee/Elbow Joint Fittings, AISI 304/316L ASTM A312/A213 Seamless Stainless Steel Pipe for Heat-Exchange Equipment and so on.