Ring seam automatic welding machine is mainly used for carbon steel, stainless steel round workpiece butt welding, according to the specific requirements of the single seam or double seam can be selected. Compared with the vertical seam welder, there is no restriction on the length of the weldment. Three or four meters long pipes can be welded easily. This equipment can be widely used for welding hydraulic cylinders, automobile steering racks, transmission shafts, gas storage cylinders, chemical and medical containers, liquefied gas tanks, fire-fighting equipment, mining and production line rollers and liquid storage cylinders and other products.