Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering En 10216-5 1.4841 Tp310 Uns 31000 Stainless Steel Seamless Tube Water Pipeline, ASME SA334 Gr 6 Carbon Steel Tube Seamless J Tubes, API 5L Gr. B JIS DIN X42/X52/X56/X60165 X70 Welded Steel Pipe and so on.