In the electric heating system, users are aware of the electric heat tracing product, used for antifreeze insulation and anti-coagulation of liquid pipelines, but they do not know that the entire electric heating system is composed of electric heat tracing and its accessories, in order to complete the needs of pipeline insulation and antifreeze. In the electric heating system, electric heat tracing as the main heating accessories, play the role of heat preservation, antifreeze and anticoagulation, its structure and whether it is insulating is very important.
The structure of electric heat tracing is divided into five layers, for: copper core wire, conductive layer, insulation layer, shielding layer and anti-corrosion layer, etc., forming a complete set of electric heat trace insulation products, in the electric heating system its insulation material selection is the main consideration of the whole project. Anti-static can not only effectively prevent the occurrence of leakage, but also improve the safety factor.
Electrical heat tracing insulation layers are generally modified polyolefins, flame retardant polyolefins, fluoroolefins, perfluorinated materials, etc., these insulation layers play a role in ensuring current transmission along the conductor and preventing current oil leakage. The improved polyolefin insulation layer has good electrical insulation performance, that is, high breakdown field strength, large insulation resistance, high voltage resistance with a thin thickness, and reduced current leakage.
In the electric heat tracing, the insulation layer not only plays the role of insulation and anti-static, but also plays a protective role for the inside of the heat trace, preventing the electric heat trace wire from being exposed to the outside after the friction of the electric trace is damaged and causing damage, etc., the electric heat trace insulation layer must have good mechanical and physical properties, which can meet the requirements of processing, laying installation and use.