Casing Pipe, Seamless Steel Pipe, High Pressure Boiler Tube manufacturer / supplier in China, offering API 5L Gr B X42 X52 X56 X60 X65 X70 X80 X100 Seamless Steel Pipe, API 5CT V150 80ss 95ss 110ss Seamless Casing Steel Pipe, API 5CT C90 T95 C110 P110 Q125 V140 V150 Casing Steel Pipe and so on.