Steel Pipe, Steel Coil, Steel Sheet manufacturer / supplier in China, offering ASTM A53 A106 Sch40 Sch80 Gr. B Black Low Carbon Mild Steel Seamless Pipe, Hot Rolled A53b 180mm GB 20cr GB 20cra GB 20cre Seamless Style Steel Pipe, API 5L Grade B Seamless Carbon Steel Pipe 10-1000mm Diameter and so on.