An electrothermal fusion sleeve is a connecting fitting made from high-quality PE plates by heat sealing, embedded with a special wire mesh. When energized, it can create a molten material between the electrothermally fused sleeve and the pipe material, allowing molecules to interpenetrate and diffuse. Therefore, after cooling, a solid bond is formed. As a result, electrothermal fusion fittings have advantages such as good sealing performance, strong connections, high tensile strength, ability to withstand large shear forces, and strong environmental adaptability. They can be used as traction fittings and are a primary choice of connecting fittings for hollow-wall wound pipes, steel-strip reinforced spiral corrugated pipes, etc. It is mainly used for connecting urban underground sewage and rainwater drainage plastic pipes.