Electric hot-melt sets a connection fittings, it is covered through net PE sheet, bending, coiling, and then by electric melting and jacket tube connected. Using a special electric mesh reason, the effect of its binding sites melted quite satisfactory sealing effect and connecting strength is very good. Its advantages are connected to high strength, good breath performance, polyurethane does not leak, anti-aging, convenient construction, etc., by people like it. Electric melting insulation jacket is the most recent years, a new type of connection fittings corrosion industry, it's anti-aging, ring stiffness was significantly better than shrinking band, and electric melting can be welded sleeve jacket pipe, then polyurethane foam, construction speed is much faster than the heat shrinkable tape, so the electric melting units are often widely used in petroleum pipelines, heat pipe mending connection.