... principle: high-frequency welding steel pipe mill is to a certain specification of stainless steel strip feeding machine, through forming rollers ... , steel straightening, steel forming, high-frequency welding, to outer burr, cooling, pipe sizing, pipe straightening, cutting, cutting Equipment List1. Double ... 3.3 Seam Guide 3.4 High Frequency Induction Welding Machine 3.5 Roller System for Moving 3.6 ...