Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering ASME SA179 High Frequency Helical Finned Pipe for Efficient Heat Exchangers, ASTM A312/A312m 304 316L Seamless Austenitic Stainless Steel Pipes for High-Temperature, Cu-Ni C70600, C70620-Copper Nickel Alloy Tubing for Petrochemical Facilities and so on.