Casing Pipe, Seamless Steel Pipe, High Pressure Boiler Tube manufacturer / supplier in China, offering A106 Gr. B Seamless Pipe Smls 3 Inch Sch40 /ASTM A53 Gr. B Carbon Steel Pipe Seamless Pipe Pakistan, 20inch Sch40 Std ASTM A106 Gr. B API 5L 20"Diameter Steel Pipe Black Line Pipe, Carbon Seamless Steel Pipe /Tube ASTM A106 Gr. B / A53/API 5L Cylindrical and Rectangular Steel Pipe and so on.