For production of steel tube, pipe in round, square. 1. Pipe O.D.: 8~ ... . Speed: 0~90m/min Tube Mill, Steel Pipe Production Line, Pipe Mill1. To make steel pipe O.D. from 0.3 to ... . Hoop cage or Horizontal Accumulator3. Main Machine: 3.1. Forming Machine 3.2. Roller System of Forming 3.3. Seam Guide 3.4. High ...