Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering SA789 Uns S31803 / S32205 Duplex Stainless Steel Pipe for Offshore & Chemical Industry, SA A179 / API 5L Seamless Carbon Steel Tube for Heat Exchangers and Oil & Gas Applications, API 5L Gr. B / ASTM A53 ERW LSAW Carbon Steel Pipe for Oil & Gas Pipeline and so on.