Thread head argon welder (160-250-350-600) This equipment is used for automatically thread head argon welding of stainless steel, steel plates and other, no deformation, no discoloring, widely used for the welding of ZH-DBW, osculum nut of solar water heater. The welding thickness is 2-4mm. The effective length is 1M and the dimension of machine is 1.5x0.6x1.7M.