... more than 3mm 3,Welding speed no less than 1000mm/min 1,Welding material SS cold-rolled sheet ,thickness 0.53 ... more than 3mm 3,Welding speed no less than 1000mm/min 4,Welding Arc Length no more than 5mm 5,Cutting ... ACCORDING TO CUSTOMER’S REQUIREMENT AND NEED. straight seam welding machine for inner and outer tanks of solar Water heater