Steel Pipe & TubeChina Large Diameter SSAW/Hsaw/Dsaw Spiral Round Welded Carbon Steel Pipe ASTM A252 Gr. 50, Find details about China Spiral Steel Pipe, Spiral Welded Steel Pipe from Large Diameter SSAW/Hsaw/Dsaw Spiral Round Welded Carbon Steel Pipe ASTM A252 Gr. 50