Pipeline heater as a special electric heating equipment, in the design and production process, must comply with the relevant explosion-proof codes and standards. The explosion-proof electric heater adopts explosion-proof structural design and explosion-proof housing, which can effectively prevent the impact of sparks and high temperature generated by electric heating elements on the surrounding flammable gas and dust, thus avoiding potential safety hazards. Explosion-proof electric heater also has multiple protection functions, such as over-current protection, over-voltage protection, lack of phase protection, etc., which can effectively protect the safety of the equipment itself and the surrounding equipment.