Casing Pipe, Seamless Steel Pipe, High Pressure Boiler Tube manufacturer / supplier in China, offering API 5L Gr. B/X42 /X52 /X60 /X65 Psl2 Carbon Steel Seamless Pipe/Tube, ASTM A333 A335 P11 High Pressure Seamless Steel Pipe/Tube Large Diameter, 200/304/306/316 Stainless Steel Hydraulic and Pneumatic Line Seamless Steel Pipe A106/A53 and so on.