... welding Min.dia.:250mm We supply seam welder,flanging machine,automatic folding machine, automatic rolling machine,etc..We are specialized in design and make all ... kinds of complete set automatic welding machines,includ TIG,MAG,MIG machine and various cutting equipment.The products ... /min7. Moving precision:±0.1mm/m8. Cylinder diameter:≥ID180mm Automatic longitudinal seam welding machine