Membrane water-cooled wall pipe panel welding production line is used for the fabrication of all specifications of pipe panel products, which is composed of flat steel finishing and cutting machine, pipe polishing and rust removing machine, pipe panel welder, in-row pipe panel bender and so on. Brief introduction This welder is composed of main machine and corresponding corollary equipments, which is used for welding multi-pipe and flat steel into pipe panel in different width. Adopting double-sided multi-welding torch groups, mixed gas shielded welding technology, with the advantages of high efficiency, reliable quality, good seam shape, advanced technology. Technical character 4 heads, 8 heads, 12 heads, 20 heads boiler membrane wall pipe panel welder and its corresponding corollary equipments can be supplied according to user requirements. On the basis of introducing Japan Mitsubishi MPintroducing Japan Mitsubishi MPM welding technologyM welding technology, this machine is modified as changing DC speed-adjustment into frequency conversion, Full localization has been realized. Simultaneous double-sided mixed gas shielded welding is available by adopting pulse inverter power supply with the advantages of little deformation, good seam shape, with quality completely meeting the technical requirement for the fabrication of boiler membrane pipe panel. This machine has completed the manufacture of 200, 000KW, 300, 000KW, 600, 000KW boiler membrane wall pipe panel satisfactorily through the productive practice of boiler factory.