... machines: 40, 50, 65, 70, and 114 tube welding machinesSpecificationsFor production of steel/galvanized tube, pipe in round, square, oval, rectangle ... frequency tube mill/ERW tube mill lineTube Mill, Steel Pipe Production Line, Pipe Mill1. To make steel pipe O.D. from ... ://www.yzhczrg.cn Welding SS Pipe Mould Rolls Die manufacturing company