Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering API 5L Line Steel OCTG Thread Pipe, ASTM A270/A249/ A511, Smls Pipe, C11000/C12200 Heating and Cooling Flexible Corrugated Copper Pipe HVAC Water/Steam Heating/Cooling Systems, Austenitic Duplex Stainless Steel Tubes for Heat Exchangers and Condensers and so on.