Steel Pipe manufacturer / supplier in China, offering Q235/A36 Welded Hot Rolled Carbon Steel Square Tube - Hollow Section, Made in China, ISO 9001 Certified, Sizes 20X20mm-200X200mm, Galvanized Pipe Galvanized ASTM Round Thread Grooved Painted Pre Galvanized Steel Pipe Machinery Industry Galvanized Steel Tube, ERW Black Painted Carbon Steel Pipe & 304/316 Stainless Steel Seamless Pipe - Hot/Cold Rolled, Made in China, ASTM/En Compliant and so on.