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 places resistance wires in a metal tube and tightly fills the surrounding gaps with crystalline magnesium oxide powder with good heat resistance, thermal conductivity, and insulation. It is 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 selecting heating pipes, users should consider the heating medium and usage environment, and we will recommend the best design scheme for the rest.

Its principle is shown in the figure

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

Main technical indicators:

1. Power parameter: 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 there should be no 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 bending point

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