The electric heating radiant tube's core is ingeniously crafted with U-shaped, axially aligned end-welded resistance wires and ceramic support frames. Uniquely, there is no shielding between the inner core and its outer protective sleeve, allowing for superior heat dissipation. With a remarkable rated working temperature of 1000 degrees, the resistance wire is available in either Cr20Ni80 or 0Cr21AI6Nb materials. The surface working temperature impressively reaches 1200 degrees, while the tube fabricated from this material attains a maximum working temperature of 1000 degrees. The support frame is composed of high alumina ceramic parts, and the outer protective sleeve is expertly constructed from cold-drawn seamless thin-walled heat-resistant steel pipe, using 1Cr25Ni20Si2 or 1Cr25Ni35Si2. This exceptional material boasts high oxidation resistance at elevated temperatures, superior creep strength, and notable carburizing resistance. Every aspect of this radiant tube’s design and material selection exudes safety. The rated working temperature extends to 1200 degrees, with resistance wire made from 0Cr27AI7Mo2. The surface working temperature can further reach up to 1400 degrees, and the short-term maximum working temperature peaks at 1250 degrees. The sturdy support frame is crafted from steel jade porcelain, while the outer protective sleeve comprises a cold-drawn, seamless thin-walled heat-resistant steel pipe, made from Fe Ni CrAI Re alloy, ensuring outstanding oxidation resistance. It operates for extended periods at 1300 degrees Celsius in oxidizing atmospheres, with short-term resistance up to 1360 degrees Celsius. Perfectly suited for high temperature, low oxygen partial pressure, and sulfur-containing environments.
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