1. Appearance: Single-end electric heating tube is one end (one end) outlet, ordinary electric heating tube is two end outlet.
2. Internal structure: The winding method of the single-end electric heating tube is different from the ordinary electric heating tube, especially the single-head electric head tube that is now imitation imported is very different from the ordinary electric heating tube.
3. Production process: There are more processes in the production of single-end electric heating tubes than ordinary electric heating tubes, such as shrinking tubes. This ensures that single-head electric heating tubes have higher power and longer use time than ordinary electric heating tubes.
The power (resistance value) of the electric heating tube depends on the heating wire inside the electric heating tube. First, when your electric heating tube passes through the pressure tube (compressing the tube diameter to the diameter required by the customer), the length of the electric heating tube will inevitably increase, and the heating wire inside will also be elongated, then the resistance value will occur accordingly The change. Second, high and low temperature burning. The correction factor of the heating wire is different at a certain temperature, which will also cause the change of the resistance value. As for the change in the resistance value of the third withstand voltage detection, it is abnormal, and it is necessary to detect the electric heating tube. The withstand voltage test is only to check whether the creepage distance meets the requirements, which has nothing to do with the heating wire.
