... 8-3mm, 1-4mm) 50/76 welded pipe production line produces welded pipes(20-50mm, 32-76mm) x ... 3mm, 1-4mm)The whole production line includes: Decoiler, shear & welder, accumulator, forming, HF welding & sizing machine(feeding, ... forming, seam guide, HF welding, squeezing, bur-scraping, zinc- ... /76 High Frequency Welded Pipe Production line