Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering ASTM-B466-B466m Seamless Copper-Nickel Pipe for Heat Exchanger, En 10217 and En 10255: Carbon Steel Pipes for Pressure&General Applications, Factory Dircet Sale ASTM A106 A53 Q195 Q235 Q235B Q345 Hot Rolled Carbon Steel Pipes Seamless Steel Pipe for Oil and Gas Pipeline and so on.