Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering ASTM Steel Fin Pipe Steel Spiral Fin Pipe for HVAC, ASTM A210 Seamless Carbon Steel Pipe Medium-Carbon Steel Boiler Tubes, JIS G3463 Stainless Steel Welding Tubes for Boilers and Heat Exchangers and so on.