Soapstone

Ceramic heating elements is often used for indirect heating of liquids in water heaters, electric boilers, oil preheaters, and industrial baths, among other things, but can also be used for direct air heating.

For these applications, the ceramic element is mounted in a tube.

Ceramic heating elements are preferred when the exchange of elements without emptying the tube or container is required. The elements are also used in applications with demands for reduced lime or coke formation, and when increased wall thickness of the tube due to heavy pressure stresses is required.