Steel Pipe, Steel Tube, Welded Steel Pipe manufacturer / supplier in China, offering Grooved Pipe ASTM A795 Sch10 A53 Sch40 Sprinkler Pipe for Fire Fighting Protection System, En39 Scaffold Tube 48.3 3.2mm Galvanized Tube for Scaffolding Building, Hot Dipped Galvanized Scaffold Tube 48.3 3.2mm Gi Steel S235jr S355jr Scaffolding Tubes for Building and so on.