... , 32-76mm) x (0.8-3mm, 1-4mm) 50/76 welded pipe production line produces welded pipes(20-50mm, 32-76mm) x ... welding, squeezing, bur-scraping, zinc-patching if galvanized strip, cooling, sizing, straightening, speed measuring), flying saw, roll table and packer. 50/76 High Frequency ... Welded Pipe Production line