1. The components are allowed to work under the following conditions: a. the relative humidity of air is not more than 95%, and there is no explosive and corrosive gas. B. The working voltage shall not be greater than 1.1 times of the rated value, and the enclosure shall be effectively grounded. C. Insulation resistance ≥ 1m Ω dielectric strength: 2kv/1min.

2. The electric heating pipe shall be positioned and fixed. The effective heating area must be immersed in liquid or metal solid. It is strictly forbidden to burn in empty. If there is scale or carbon on the surface of the pipe body, it should be cleaned and reused in time to avoid heat dissipation and shorten the service life.

3. When heating fusible metal or solid salted salt, alkali, leach, wax, etc., the service voltage shall be reduced first, and the rated voltage can only be raised after the medium is melted.

4. When heating air, the elements shall be arranged evenly and cross so that the elements have good heat dissipation conditions, so that the air flowing through can be heated fully.

5. Safety measures shall be taken into account when heating salted salt to prevent explosion accidents.

6. The wiring part shall be placed outside the insulation layer to avoid contact with corrosive, explosive medium and water; the lead-in connection shall be able to bear the temperature and heating load of the wiring part for a long time. When the connection screws are tightened, excessive force shall be avoided.

7. The components shall be stored in the dry place. If the insulation resistance is lower than 1m Ω for a long time, it can be dried in an oven about 200 ℃, or the voltage can be reduced to be electrified and heated until the insulation resistance is restored.

8. The magnesia powder at the outlet of the electric heating pipe shall be prevented from being infiltrated by pollutants and water in the use place, and the leakage accident shall be prevented.