Casing Pipe, Seamless Steel Pipe, High Pressure Boiler Tube manufacturer / supplier in China, offering ASTM A335-P2 P1 P11 A213-T2 T12 Crmo Alloy Seamless Steel Pipe of Boiler Tube, ASTM/ASME SA179 High Pressure Carbon Steel Seamless Pipes for Boiler and Heat Exchanger, ASTM A106 Gr. B ASTM A53 API 5L Seamless Steel Pipe / Steel Pipe / Carbon Seamless Steel Pipe and so on.