Common knowledge of electric heating tubes in wholesale

Common knowledge of electric heating tubes in wholesale

1. Metal tubular electric heating elements for wholesale of electric heating tubes

Using a metal tube as the outer shell and an alloy heating wire as the heating element, there is a lead out rod (wire) at one or two ends filled with magnesium oxide insulation medium inside the metal tube to fix the heating element of the heating element.

2. Lead out rods for wholesale of electric heating tubes

A metal conductive component connected to a heating element, used for connecting components to a power source, and components to components.

3. Unfolded length of wholesale electric heating tubes (L), mm

The sum of the straight line and bending length of the metal tube on the component drawing.

4. Heating length of wholesale electric heating tubes (t), mm

The length of the heating element arranged on the component diagram.

5. Wholesale heating surface area of electric heating tubes, cm square

The surface area of the metal tube on the heating length.

6. Surface load of wholesale electric heating tubes, W/cm square

The power per unit area on a heating surface.

7. Sufficient heating conditions for wholesale of electric heating tubes

The working conditions that enable the component to reach the specified working state.

8. Rated voltage for wholesale of electric heating tubes, V

Refers to the voltage specified and marked on the component casing during design when connected to the component.

9. Rated power of wholesale electric heating tubes, kW

Refers to the input power of the component specified and marked on the component casing during design.

10. Working voltage of wholesale electric heating tubes, V

For a single component connected to the power supply, it refers to the voltage specified in the design when connected to the component, and the single ended electric heating tube is the rated voltage; For a group of components connected in series to a power supply, it refers to the voltage specified in the design to be connected to this group of components.

11. Working temperature for wholesale of electric heating tubes, ℃

The average temperature of the heating surface of the component under rated power and sufficient heating conditions.

12. The highest temperature for wholesale of electric heating tubes

The temperature at the highest temperature point on the heating length of the component under 1.27 times the rated power and sufficient heating conditions.

13. Simulation conditions for wholesale of electric heating tubes

In the state of each clause of the standard, measures are taken to ensure that the working temperature of the component basically matches the specified value under the working conditions.

14. Allow repairs

Repair refers to the repair of damaged lead out rods, metal surface coatings, insulators, and seals, without affecting the performance and normal use of the components.

15. Recovery

Due to usage and long-term storage, the electrical insulation performance of the component is lower than the standard value. The process of restoring its electrical insulation performance to the standard value through methods such as oven drying, without affecting the performance and normal use of the component.

16. Damage

a. The withstand voltage of the component is lower than the standard value, the leakage current is greater than 5mA, or the insulation current is lower than 1M Ω, and it cannot be restored;

b. The shell has flame emission and molten material, severe surface corrosion or other damage that cannot be repaired;

c. The actual power of the component exceeds the rated power by 20%

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