Casing Pipe, Seamless Steel Pipe, High Pressure Boiler Tube manufacturer / supplier in China, offering ASTM A179 Seamless Cold-Drawn Seamless Heat-Exchanger and Condenser Tube, Seamless Pipe ASTM A106 Gr. B API 5L Sch40 Sch80 Low Carbon Black Seamless Steel Pipe, ASTM A53 A106 API5l Steel Pipe /Precision Seamless Steel Pipe Cold Drawn /Hot Rolled Gr a Gr B Schedule 40 Black Seamless Steel Pipe in Tianjin and so on.