It is beneficial to use a tube to plate automatic welding machine when your tube and tube plate are not vertical and must be placed horizontally. If your tube and tube plate weld seam can be welded vertically, you don't have to use a tube to plate automatic welding machine. The characteristic of the tube to plate automatic welding machine is thin weld seam. If your weld seam requires corrosion resistance, then the tube to plate automatic welding machine is harmful anyway. Gas shielded welding must be used. Current of around 250A. If the gas shielded welding current is small, it is not resistant to corrosion.