Electric heating radiation tube inner core

Electric heating radiation tube inner core

Composed of resistance wires and ceramic support brackets welded at the end of the U-shaped axial arrangement, there is no shielding between the inner core and the outer protective sleeve, resulting in good heat dissipation. In an electric heating radiation tube with a rated working temperature of 1000 degrees, the material of the resistance wire is Cr20Ni80 or 0Cr21Al6Nb, and the surface working temperature can reach 1200 degrees. The maximum working temperature of the electric heating radiation tube using this material can reach 1000 degrees, and the support frame is a high aluminum ceramic component. The outer protective sleeve is a cold-drawn seamless thin-walled heat-resistant steel pipe, made of 1Cr25Ni20Si2 or 1Cr25Ni35Si2. The material has good high-temperature oxidation resistance, high high-temperature creep strength, and certain anti carburizing performance. The design and material selection of this radiation tube have a high safety factor.

The electric heating radiation tube with a rated working temperature of 1200 degrees Celsius is made of 0Cr27Al7Mo2 resistance wire, and the surface working temperature can reach 1400 degrees Celsius. The maximum short-term working temperature of the electric heating radiation tube using this material is 1250 degrees Celsius, and the support frame is made of steel jade porcelain. The outer protective sleeve is a cold-drawn seamless thin-walled heat-resistant steel pipe made of Fe Ni Cr Al Re alloy. This material has ultra-high oxidation resistance and can work for a long time at 1300 degrees Celsius in an oxidizing atmosphere, while short-term oxidation resistance is at 1360 degrees Celsius. Suitable for working in high temperature, low oxygen partial pressure, and environments containing S and C.

The electric heating radiation tubes developed and produced by our factory not only serve as supporting equipment for various domestic heat treatment equipment manufacturers, but also can be used to research, design, and manufacture non-standard heaters for users. According to the usage situation, they can be divided into: heat-resistant steel seamless tubes, plate circle welded tubes, centrifugal cast tubes, and non-metallic sleeves.

Characteristics of high-temperature electric heating radiation tubes:

1. Manufacturing of seamless cold drawn heat-resistant steel pipes produced from high-quality raw materials (with a maximum temperature of 1200 degrees Celsius);

2. The inner core adopts resistance wire U-shaped axial arrangement and end welding method;

3. The resistance wire and ceramic frame are basically unshielded, and the temperature difference between the resistance wire and the furnace is small;

4. The maximum working temperature is 1000 degrees or 1200 degrees;

5. The biggest advantage of the radiation tubes produced by our company is the use of seamless cold drawn, thin-walled heat-resistant steel pipes (1Cr25Ni20Si2 or 0Cr25Ni20Si2), which have a 10% higher thermal radiation than similar products;

6. Use for over 8000 hours.

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