... Aluminium Pipe making machineDevice principle: high-frequency welding steel pipe mill is to a certain specification ... 01.0~4.51.5~5.0Welding speed(m/min)20~10020~10020~10020~7020~60Main ... cut, hopper, steel straightening, steel forming, high-frequency welding, to outer burr, cooling, pipe sizing, pipe straightening, ... Seam Guide 3.4 High Frequency Induction Welding Machine 3.5 Roller System for Moving ...