... pipes(20-50mm, 32-76mm) x (0.8-3mm, 1-4mm) 50/76 welded pipe production line produces welded pipes(20 ... 32-76mm) x (0.8-3mm, 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-patching if galvanized ...