The majority of pressure vessels are for industrial use. Some private sector uses include hot water storage tanks and diving cylinders. Industrial uses for pressure vessels include distillation towers, hydraulic reservoirs, and containment of liquefied gases. Industrially, pressure vessels can be used for high-pressure or low-pressure containment, depending on the need of the client and the materials used. They can also be used for both cooling and process heating. As well as a means of achieving secondary containment in processing materials.
For use with either gases or liquids, pressure vessels can be used in tandem with electric immersion heaters. Industrial versions of these heaters achieve the heating of various substances (water, oils, gases, and solvents) through direct contact. Immersion heaters can be mounted on a pressure vessel through flanged, welded or threaded connections. The combination of electric immersion heaters and pressure vessels is ideal for heating gases and liquids, as well as for generating steam.