Large electric heating tubes for boiler applications and small electric heating tubes for individuals. Nowadays, in order to prevent rust, many electric heating tubes use a lot of chemical treatment. Generally, the most common thing we do is to treat copper on the surface of the electric heating tube. Of course, there is also aluminum.
In the production process of a good electric heating pipe, it has to go through many processes. The ultimate goal is for the life and safety of the electric heating tube. For a device that has been constantly heating, in technical terms, the electric heating tube is best to buy qualified products from regular manufacturers.