Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering DIN17175/2448 St. 35.8 ASTM A179/210 Hot Finished with 3.1-Certificates Seamless Steel Boiler Tubes, 45degree 90degree ASTM 234 Carbon Steel Smls Pipe Black Bwfitting/Elbow ASME B16.9, Stainless Steel Corrugated Fire Tube Spiral Pipe for Heat Exchanger and so on.