Ultrasonic lap seam welding technology Ultrasonic lap seam welding, co-extrusion forming; Low waster ratio and easy operation; Welder, inverter, temperature controller and PLC control components imported from foreign countries; High automatically degree, B&R PCC Programmable Control System can control speed of extrusion/hauling, temperature, pipe diameter etc. Butt-joint argon-arc welding technology: Advanced technology Butt-joint argon-arc welding, welding seam close-grained, smooth surface and its quality can be comply with American standard; Having good appearance, double gun transforming weld, layer separate extrusion; Easy to replace die and moulds, high finished products ratio. High grade collocation Welder, inverter, temperature controller and PLC control components imported from foreign countries. High automation degree High automatically degree, B&R PCC Programmable Control System can control speed of extrusion/hauling, temperature, pipe diameter etc.