CH (W) series general horizontal circular seam automatic welding machine is a kind of can complete all kinds of circular, circular seam welding automatic welding equipment. Can be used for carbon steel, low alloy steel, stainless steel, aluminum and its alloys and other materials of high quality welding, and choice of argon arc welding wire filling wire filling) or not (and melting polar gas (CO2 / MIG/MAG welding, plasma welding and other welding power source is a set of automatic girth welding system. The device can be widely used in the hydraulic oil cylinder, car direction, drive shaft, air storage tank, chemical industry and medical containers, propane tanks, fire equipment, mining and production line with roller and the liquid storage tube welding products.