How to distinguish the quality of electric heating tube

The electric heating tubes on the market are dazzling. The quality of electric heating tubes is our most concern. The correct selection of qualified products can improve the safety factor and service life of use. How to distinguish the quality of the electric heating tube? The manufacturer will take you to discuss the aspects from which to distinguish the quality of the electric heating tube.

 

1. Insulation

 

The main factor that affects the insulation of the electric heating tube is the sealing process of the electric heating tube. A good electric heating tube can generally achieve more than 1000 megohms.

 

2. Leakage current

 

Mainly related to the temperature of the electric heating tube, the voltage of the electric heating tube, the heating length of the electric heating tube, etc., which is also an important evaluation index for the high-temperature electric heating tube.

 

3. Corrosion resistance

 

Water heating electric heating pipes and barbecue electric heating pipes often encounter problems. In addition to the reasonable selection of materials, it is also related to the heat treatment of the electric heating tube and the surface condition of the electric heating tube.

           Heater

 

4. Electric strength

 

The influencing factors of the electric strength of the electric heating tube mainly include the thickness of the insulating layer, the quality of the raw material of the insulating layer, the length of the electric heating tube, the radius of the bend, and the number of bends.

 

5. Power accuracy

 

It is mainly related to the quality of the resistance wire and the technological level of the manufacturer. Qualified electric heating tubes need to be tested for temperature coefficient before mass production to determine the cold resistance of the qualified power range.

 

6. Life

 

In addition to the quality of the resistance wire, the life of the electric heating tube is also related to the quality of the magnesium oxide powder and the selection of the diameter of the resistance wire. For high-temperature electric heating tubes, the electric heating tube should be an electric heating tube with a surface load below 8W/CM2. Therefore, when selecting the diameter of the resistance wire, it is necessary to calculate the surface load of the resistance wire to meet the life expectancy.