The principle of stainless steel tubular electric heating tube

The principle of stainless steel tubular electric heating tube

Stainless steel electric heating tubes are a common member of the electric heating tube family, and have gained great popularity in recent years with the development of stainless steel. A tubular electric heating tube (including a tubular stainless steel electric heating tube) is a heating element that is placed in a metal tube with resistance wires and tightly filled with crystalline magnesium oxide powder with good heat resistance, thermal conductivity, and insulation in the surrounding gaps, and then processed through other processes. It has the characteristics of simple structure, high mechanical strength, high thermal efficiency, safety and reliability, convenient installation, and long service life. Widely used in various saltpeter tanks, water tanks, acid and alkali tanks, air heating furnaces, drying boxes, hot molds and other devices. When choosing a heating tube, users should consider the heating medium and usage environment, and we will recommend the best design solution for the rest.

Its principle is shown in the figure

Fill the gap between the metal tube and the electric heating wire with fused crystalline magnesium oxide powder as the insulation and thermal conductivity layer.

Main technical indicators:

1. Power parameters: The power at rated voltage is+5% -10%

2. Leakage current: Leakage current at operating temperature<0.5mA

3. Electrical strength: The electrical strength at working temperature should withstand experimental voltage>1000V, 50Hz, 1MIN, and should not have flashover breakdown:

4. Insulation resistance: Cold insulation resistance ≥ 100MQ (megaohms)

Appearance: No significant mechanical scars or local swelling, no wrinkles, bumps, or other phenomena at the bend

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