... welding steel pipe mill is to a certain specification of stainless steel strip feeding machine, through forming rollers to curl ... sizeRectangular tubeΦ40~Φ114 And Appropriate sizeRectangular tubeWelded steel pipe wall thickness(mm)0.5~2.50.6~3. ... steel forming, high-frequency welding, to outer burr, cooling, pipe sizing, pipe straightening, cutting, cutting Equipment List1. Double side uncoiler 2. ...