Several aspects can distinguish the quality of the electric heating tube: electrical strength, insulation, leakage current, power accuracy, life, corrosion resistance, size and so on.
The following are 1. Electrical strength: The influence factors of the electric strength of the electric heating pipe mainly include the thickness of the insulating layer, the quality of the raw material of the insulating layer, the length of the electric heating pipe, the radius of the bending and the number of bending. Deshengtai can generally achieve 2000V, 1 second, and a breakdown current of 0.5mA in the cold withstand voltage of the electric heating tube.
2. Insulation: The main factor affecting the insulation of electric heating pipes is the sealing process of electric heating pipes. Generally achieve more than 1000 megohms.
3. Leakage current: Mainly related to the temperature when the electric heating tube is used, the voltage of the electric heating tube, and the heating length of the electric heating tube. An important evaluation indicator for high temperature electric heating pipes.
4. Power accuracy: mainly related to the quality of the resistance wire and the process level of the manufacturer. Deshengtai needs to test the temperature coefficient before mass production to determine the cold resistance of the qualified power range.
5. Life: The life of the electric heating tube is related to the quality of the electric resistance wire, and also related to the quality of the magnesium oxide powder and the selection of the diameter of the electric resistance wire. For high-temperature electric heating tubes, Deshengtai Electrothermal Energy manufactures electric heating tubes with surface loads below 8W/CM2. When selecting the diameter of the resistance wire, the surface load of the resistance wire needs to be calculated to meet the life requirement.
6. Corrosion resistance: It is a problem often encountered in water heating electric heating tubes and barbecue electric heating tubes. In addition to reasonable selection of materials, it is also related to the heat treatment of the electric heating tube and the surface state of the electric heating tube.