Focus: 1. The component is allowed to work under the following conditions: (1) The relative humidity of the air is not more than 95%, and there is no explosive and corrosive gas. (2) The working voltage should not be greater than 1.1 times the rated value, and the shell should be effectively grounded. (3) Insulation resistance≥ 1MΩ dielectric strength: 2KV/1min. 2. The electric heating tube should be positioned and fixed, and the effective heating area must be fully immersed in liquid or metal solid, and empty burning is strictly prohibited. When it is found that there is scale or carbon formation on the surface of the pipe body, it should be cleaned up in time before use, so as not to affect heat dissipation and shorten the service life. 3. When heating fusible metals or solid nitrates, alkali, asphalt, paraffin, etc., the use voltage should be reduced first, and only after the medium is melted can it rise to the rated voltage. 4. When heating the air, the components should be crossed and evenly arranged, so that the components have good heat dissipation conditions, so that the flowing air can be fully heated. 5. Safety measures should be considered when heating nitrate to prevent explosion accidents. 6. The wiring part should be placed outside the insulation layer to avoid contact with corrosive, explosive medium and water; The lead wire should be able to withstand the temperature and heating load of the wiring part for a long time, and excessive force should be avoided when the wiring screw is tightened. 7. The components should be stored in a dry place, if the insulation resistance is lower than 1MΩ due to long-term placement, it can be dried in an oven at about 200 °C, or reduce the voltage and energize heating until the insulation resistance is restored. 8. The magnesium oxide powder at the outlet end of the electric heating pipe can avoid the infiltration of pollutants and water in the place of use to prevent the occurrence of leakage accidents.
