Casing Pipe, Seamless Steel Pipe, High Pressure Boiler Tube manufacturer / supplier in China, offering ASTM A795 A53 Grade B Std Carbon Steel Tube ERW Galvanized Iron Pipe, High Quality S195 S235 S355 S345 Pre Galvanized Hollow Section Steel Pipe and Gi Pipe, Factory Rate X42 X50 2mm 4mm 6mm Thickness Round Carbon Seamless Steel Pipe API 5L Casing Pipe and so on.