... materials andrelevant products for steel pip and galvanized pipe.We have a Export Products Department, ... made in China including Steel pipes, square steel pipes,rectangular steel pipes, galvanized steel, galvanized square, rectangular tubes, spiral ... fence, heating facilitiesetc. Hot Dipped Galvanized Steel Pipe High-frequency welded ERW galvanized steel pipeOuter Diamete19mm-50mmWall thickness0.5mm ...