The gaps are filled and compacted with magnesium oxide powder with insulation and thermal conductivity propertie

The gaps are filled and compacted with magnesium oxide powder with insulation and thermal conductivity properties

Electric heating tubes are electric heating elements that can heat molds, liquids, air, etc. It is made of metal tubes as the outer shell (including stainless steel and copper tubes), and spiral electric heating alloy wires are uniformly distributed along the central axis of the tube. The gaps are filled and compacted with magnesium oxide powder with insulation and thermal conductivity properties. The tube mouth is sealed with silicone gel. The following are the main components of the raw materials for electric heating tubes:

1. Lead out rod: iron or stainless steel;

2. Sealing material: silicone rubber or epoxy resin, etc;

3. Insulators: Generally, white porcelain heads are used;

4. Filler: Insulating magnesium oxide powder;

5. Electric heating wire: iron chromium aluminum or nickel chromium wire;

6. Leads: Generally, there are domestically produced red silicone wires, mica wires, ceramic bead wires, PTFE wires, PTFE wires, etc.

7. Metal protective sleeves: Different metal protective sleeves are selected according to the working environment of different people. Generally, temperature and corrosion resistant materials such as stainless steel 304, stainless steel 321, stainless steel 316, stainless steel 310S, and Ingel 800 are used.

In addition, if you want to know the quality of the electric heating tube, you can also refer to the following points:

1. A good electric heating tube must be designed according to the working environment in terms of size, power, and appropriate housing material, so generally electric heating tubes are customized.

2. From the basic packaging and appearance, it can be seen that the surface is smooth, without unevenness, no burrs, the incision is flat and smooth, the color is uniform, the welding joint is tight, and there is no hollowing phenomenon.

3. Measure whether the basic dimensions of the electric heating tube are consistent with those purchased by oneself;

4. Check if it meets national standards:

1. Cold insulation resistance greater than or equal to 50 megaohms

2. Hot leakage current less than or equal to 0.12mA

3. Cold state leakage current less than or equal to 0.5MA

4. Thermal insulation resistance greater than or equal to 3 megaohms

5. Hot state withstand voltage test 50HZ, 1500V, 1 minute, there should be no flashover or breakdown phenomenon

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