Steel Pipe and Fitting, Valve, Manhole Cover manufacturer / supplier in China, offering API 5L ASTM A53 Gr. B Seamless Carbon Steel Line Pipe, ANSI B36.19 ASTM A312 Tp316L Stainless Steel Seamless Pipe, Stainless Steel Pipe Tp316L ASTM A312 ANSI B36.19 and so on.