Roofing Sheet, Galvanized Steel, Galvalume Steel manufacturer / supplier in China, offering 3 1.5 6 4 Inch DN40 DN50 Sch40 Galvanized Welded Steel Pipe, Sch 40 80 1/2 3/4 1"2"1.5"Inch18 Inch Galvanized Steel Pipe, ASTM A53 Sch40 2 3 6 Inch Hot Dipped Galvanized Steel Pipe and so on.