Abstract: A press welding process which can be used in such industries as car-making, production of hot-water boilers, industrial and civil construction, in construction of pipelines using small and medium diameter pipes, for welding parts with a solid and developed cross-section, as well as for joining parts to form a T-joint. A magnetically impelled arc butt welding is achieved, that, during heating, the controlled continuous displacement of the parts being welded is performed where the gap between the parts edges is kept constant. The value of the welding arc voltage is used as the parameter for the gap size adjustment, and the moment of achievement of the required temperature on the edges of parts being welded, is determined by the length of the relative displacement of the parts, and when the assigned values of displacement have been reached, the speed of the arc movement along the edges of the parts being welded, is programmed.