... boiler heat interchanger 3,Price has competive KHB12-80 Orbit tube/tube plate welding machinefunctionUsed for welding of flush, protruding, recessed ... and copper alloy, titanium alloy, etcApplication1,KHB12-80 Orbit tube/tube plate welding machine.2,Used for welding of flush, protruding ... argon with direct current, with or without pulsing.7,8 m long hose assembly for connection to power source. 8, ...