It adopts the structure design of multiple U-shaped electric heating pipes welded to the flange, which is highly dense, compact in structure, good stability, centralized heating, and installation without brackets. It has the advantages of uniform heating, high efficiency and energy saving, and convenient installation. It is used for heat preservation and heating of materials in mold temperature machines, dishwashers, various storage tanks, containers, and fuel tanks. It is widely used in petroleum, chemical, food, machinery and other industries.