Steel Tube and Pipe, Steel Construction, Carbon Steel Pipe manufacturer / supplier in China, offering K9 C25 C30 C40 DN80 DN100 DN150 DN200 DN250 DN300 DN350 DN400 DN500 DN600 DN700 DN800 DN900 DN1000 Ductile Iron Pipes, Ms Steel ERW Carbon ASTM A53 Galvanized Iron Pipe Welded Sch40 Pipe Galvanized Steel for Building Material, ASTM A106 / API 5L Sch 40 High Quality Steel Seamless Pipe for Fluid and so on.