... thickness 0.53-2.5m 2,Seam width no more than 3mm 3,Welding speed no less than 1000mm/min ... 0.53-2.5m 2,Seam width no more than 3mm 3,Welding speed no less than 1000mm/min ... 0.05mm SS sheet)6,Welding Length 1000mm-3500mm WE CAN MANUFACTURE KINDS OF EQUIPMENT FOR INNER TANK AND OUTER ... TO CUSTOMER’S REQUIREMENT AND NEED. straight seam welding machine for inner and outer tanks of solar Water heater