It has the advantages of light, convenient disassembly, simple structure, less material, long life, high heat conversion rate, environmental protection, energy saving and electricity saving, and can be bent into various shapes according to the requirements of customers. which can heat various gases, solids and liquids. It has a wide range use such as mold, casting hole installation, water heating (water tank, pool), oil barrel, tank, pressure vessel, boiler, reactor heating, oven, baking room, air duct, kiln, shed and other air heating.