The heating core of the electric heating radiant tube is ingeniously engineered with U-shaped, axially aligned, end-welded resistance wires and supported by robust ceramic frames. With no shielding between its inner core and outer protective sleeve, it promises exceptional heat dissipation. The radiant tube boasts a rated working temperature of 1000 degrees Celsius, with the resistance wire material options of Cr20Ni80 or 0Cr21AI6Nb, and can reach a surface temperature of 1200 degrees Celsius. Maximum working temperatures using this material can achieve an impressive 1000 degrees, supported by high-quality high alumina ceramic components. The outer protective sleeve is crafted from a meticulously cold-drawn seamless thin-walled heat-resistant steel pipe of 1Cr25Ni20Si2 or 1Cr25Ni35Si2, offering outstanding high-temperature oxidation resistance, high creep strength, and carburization resistance. This superior design and material choice ensure a high safety margin. For those requiring a higher rated working temperature of 1200 degrees, the resistance wire can be made of 0Cr27AI7Mo2, supporting surface temperatures of 1400 degrees, with a short-term peak of 1250 degrees. Enhancements include steel jade porcelain support frames and a cold-drawn seamless thin-walled heat-resistant steel pipe protective sleeve made from Fe Ni CrAI Re alloy, renowned for its superior oxidation resistance. It operates efficiently at 1300 degrees Celsius in oxidizing environments, with short-term resistance up to 1360 degrees Celsius, ideal for high-temperature, low oxygen, and SC-laden settings.
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