BS 7798:1998

This standard BS 7798:1998 Specification for industrial immersion heaters using metal-sheathed elements is classified in these ICS categories:

• 91.140.65 Water heating equipment

This British Standard specifies requirements for industrial electric immersion heaters designed for permanent installation in cylinders or tanks, for the heating of liquids.

The heaters may have fixed, replaceable or removable elements.

This standard does not apply to immersion heaters for mounting over the side of tanks, nor to heaters designed for household use.