It is used for the safe storage of petroleum-derived flammable fuels such as fuel-oil, motor oil and mineral oils.

The serpentines of devices manufactured including the heater serpentine in heating systems and industrial facilities where fuel-oil is used are manufactured from welded steel drawn pipe (PN 6). The heating effect is increased by making a sheet metal sheath to cover the heater pipe. It is suitable for hot water and steam as heating fluids.