The rate of change in resistance of a single head electric heating tube varies due to various factors, such as the type of resistance wire and the temperature of use. Widely used in various saltpeter tanks, water tanks, acid and alkali tanks, air heating furnaces, drying boxes, hot molds and other devices.
Single headed pipes have the characteristics of simple structure, high mechanical strength, high thermal efficiency, safety and reliability, convenient installation, and long service life. As soon as there is current passing through the single headed tube, it generates heat, and as the temperature rises, the resistance value changes (increases). Therefore, when determining the resistance wire resistance of a single headed tube, the reference room temperature resistance value must be subtracted from the resistance value at temperature.
The quality of a single head tube is closely related to the resistance wire, therefore, it is very important to choose the resistance wire used inside the single head tube. The responsible manufacturers will choose according to the following requirements:
1. Fully utilize the temperature;
2. Maintain stable quality;
3. Easy to process, with high mechanical strength at high temperatures;
4. Resistance changes less at high temperatures.