How to judge the quality of solar electric heating tubes

How to judge the quality of solar electric heating tubes

Solar electric heating tube, as the name suggests, is a component that conducts electricity and heats in electrical appliances. Moreover, most electrical appliances require the use of solar electric heating tubes, and without this component, the entire system cannot function. So, it is an indispensable member among the types of electric heating elements.

Generally, the professionalism and reliability of testing can be evaluated through his process procedures, including checking the outer diameter and incision based on the specifications of the cut pipe. Next is to check his chamfer and check the size of the inner diameter of the two sections. The compression of compressed air is generally 6-7 kilograms of force as the standard. There are also other small knowledge related to single head heating tubes, as well as attention to leakage current at working temperature. Overload testing, sealing testing of the shell of solar electric heating pipes, and testing of their lifespan are all professional testing knowledge,

Six reasons for the explosion of electric heating tubes

The burst of an electric heating tube refers to the rupture of the metal outer wall of the electric heating tube after being energized. This damage is irreversible and needs to be avoided as much as possible. Now let's analyze the reasons for the burst of pipes with everyone:

1. Design issues. The power design of the electric heating tube is too high, resulting in a fast internal heating rate and high temperature, causing internal expansion of the electric heating tube. However, the surface load of the metal outer tube is too high, ultimately leading to tube expansion and cracking.

2. Material issue - the metal tube itself. Defects in pipe material, thin pipe walls, and insufficient temperature resistance of the material itself can all lead to insufficient pressure resistance of the pipe.

3. Material issue - magnesium oxide powder. Magnesium oxide powder, as a thermal conductivity and insulation material, is distributed between the heating wire and the heating tube wall. It is one of the important materials for electric heating tubes. Insufficient purity, excessive impurities, and dampness of magnesium oxide powder can easily cause heat to accumulate in the tube and prevent it from conducting at a certain position. When it reaches a certain limit, it can cause tube explosion.

4. Strictly follow the rated voltage and correct wiring method when using, and store in a dry place. Electric heating tubes that have not been used for a long time need to be started at low voltage and gradually increased in usage voltage.

5. Heating pipes used for liquid heating need to improve water quality, reduce impurities, or regularly clean the surface of the heating pipes.

6. Heating tubes are consumable products, and users should regularly organize inspections for hidden dangers, and regularly maintain and replace core heating tube components.

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