Electric fusion welding line for polyethylene gas pipes

The utility model discloses the structure of an electric fusion welding line for polyethylene gas pipes. The electric fusion welding line with a round section, the overall structure of which is shaped like a band, comprises a resistance wire core, an insulating varnish layer and a polyethylene insulating layer, the insulating varnish layer which can withstand the temperature of 150 DEG C to 300 DEG C is applied on the surface of the resistance wire core, and the outer surface of the insulating varnish layer is wrapped by the polyethylene insulating layer. The diameter of the section of the electric fusion welding line is designed as 1.80mm to 4.70mm. The diameter of the section of the resistance wire core is designed as 0.40mm to 0.90mm. The thickness of the insulating varnish layer is designed as 0.01mm to 0.06mm. The thickness of the polyethylene insulating layer is designed as 0.60mm to 2.0mm. The electric fusion welding line solves the problem that the resistance wire is deformed after being heated, and p