... : 0mm~90mm welded pipe mill line(another names: Pipe-making machine line, tube mill, high frequency steel pipe tube mill machine, welded pipe mill line, pipe mill, pipe production line, and so on.) The complete line include the following ... . Forming Machine 3.2. Roller System of Forming 3.3. Seam Guide 3.4. High Frequency Induction Welding Machine 3.5 ...