Automatic Mig Welding Machine , Circular Seam / TIG Welding Machine DESCRIPTION Automatic circular/straight seam welding machine asopts argon arc welding machine as the welding power source. It cae be used for longitudinal seam welding(straight seam welder). circular seam welding (such as flanges, pipe to pipe joint,cylinder girth welding etc.) and other types of work piece welding. Automatic argon welding machine composition: welding power, arc striking and stabilizing