... machineDevice principle: high-frequency welding steel pipe mill is to a certain specification of stainless steel strip feeding machine, through forming ... , steel butt cut, hopper, steel straightening, steel forming, high-frequency welding, to outer burr, cooling, pipe sizing, pipe straightening, ... of Forming 3.3 Seam Guide 3.4 High Frequency Induction Welding Machine 3.5 Roller System for Moving 3.6 ...