Laser-welded jackets are used to create different types of heat exchange elements, which may be used in industrial heating or cooling of various types of products, including food products, e.g. non-alcoholic beverages and alcohol (beer, wine) and milk. These jackets also work well in the pharmaceutical, cosmetics, and chemical industries, They are used to weld sheets of equal thickness, which are applied to make plates for heat exchangers, and also for welding sheets of various thicknesses, used in the production of reactors, tanks, etc.