... to 25mm Brand name :Youfa Biggest steel manufacturer in China welded galvanized pipewelded galvanized pipeSize Wall thickness (W.T.)1/2 ... Industrial park ,Tianjin city China .Youfa Group is the strongest welded steel pipe manufacturing group, and YOUFA brand is the No ... Qin Tel :86-10-59574179-206 Fax : 86-10-59574107 welded galvanized pipe