... ... diameter welded pipes. straight welded pipe production line: to produce 8-20mm, 12-32mm, 16-50mm, 25-76mm, 32-89mm diameter ... welded pipes, with wall thickness as 0.6-1.5mm, 0.8-2.0mm, 0.8-3.0mm, 1-4.5mm ... (Flattening unit +Main driving unit +Forming unit +Guide unit + High frequency induction welding unit +squeeze roller)+ De-burr frame →→Cooling unit →→ Sizing unit ...