What precautions should be taken when using electric heating tubes

What precautions should be taken when using electric heating tubes? Let me briefly talk to everyone:

1. Components are allowed to operate under the following conditions:

A. The relative humidity of the air shall not exceed 95%, and there shall be no explosive or corrosive gases.

B. The working voltage should not exceed 1.1 times the rated value, and the casing should be effectively grounded.

C. Insulation resistance ≥ 1M Ω Dielectric strength: 2KV/1min

2. Electric heating tubes should be properly positioned and fixed, and the effective heating area must be fully immersed in liquid or metal solids, and empty burning is strictly prohibited. When scale or carbon deposits are found on the surface of the pipe, they should be promptly removed and reused to avoid affecting heat dissipation and shortening the service life.

3. When heating fusible metals or solid nitrates, alkalis, drains, paraffin, etc., the operating voltage should be lowered first, and the rated voltage can only be raised after the medium melts.

4. When heating the air, the components should be arranged evenly and cross to provide good heat dissipation conditions and allow the flowing air to be fully heated.

5. When heating nitrate, safety measures should be considered to prevent explosion accidents.

6. The wiring part should be placed outside the insulation layer to avoid contact with corrosive, explosive media, and moisture; The wiring should be able to withstand the temperature and heating load of the wiring section for a long time, and excessive force should be avoided when tightening the wiring screws.

7. Components should be stored in a dry place. If the insulation resistance is lower than 1M Ω due to long-term storage, they can be dried in an oven at around 200 ℃ or heated by reducing the voltage until the insulation resistance is restored.

8. The magnesium oxide powder at the outlet of the electric heating tube should be protected from pollutants and moisture infiltration in the use area to prevent leakage accidents.

The above are the precautions to be taken when using electric heating tubes, hoping to be helpful to you.