HG159 series welded pipe machine for double semiautomatic machine with axial positioning of the roller bearing at both ends, with a DC motor driven stepless to 0-10 per minute transfer speed of rotation, hydraulic automatic clamping, with two CO2 welder while bearing ends for welding, length according to the user's needs making, is not less than the minimum roller 200mm. The machine is completely controlled by the PLC electrical and hydraulic, depending on the specifications of the roller, adjust the machine, workers will be processed pipe, put his hand on the machine frame material, pressing machine control knob will automatically rotate items into, arc, arc close, relax, due to convenient machine adjustment, therefore very efficient, skilled workers can 350-450 a middle class.