The heart of the electric heating radiant tube is ingeniously crafted with U-shaped axially arranged end welded resistance wires, elegantly supported by ceramic frames. This innovative design ensures superb heat dissipation due to the absence of shielding between the core and its outer protective sleeve. Impressively, this electric radiation tube operates at a rated temperature of 1000 degrees, with resistance wires made from high-quality Cr20Ni80 or 0Cr21AI6Nb, offering a surface working temperature of up to 1200 degrees. The peak operational temperature for this material extends to 1000 degrees, with its support frame forged from high alumina ceramic components. The outer protective sleeve, a marvel of engineering, is a cold-drawn seamless thin-walled heat-resistant steel pipe, composed of 1Cr25Ni20Si2 or 1Cr25Ni35Si2. This composition boasts excellent high-temperature oxidation resistance, formidable high-temperature creep strength, and resilience against carburizing. Meticulous design and material choice bestow this radiation tube with an exceptional safety factor. When constructed from 0Cr27AI7Mo2, the rated working temperature soars to 1200 degrees, allowing the surface temperature to escalate to an impressive 1400 degrees. This material's maximum short-term working temperature reaches an impressive 1250 degrees, with steel jade porcelain forming the support frame. The outer protective sleeve, crafted from Fe Ni CrAI Re alloy, exhibits remarkable oxidation resistance, functioning efficiently at 1300 degrees Celsius in oxidizing atmospheres, and enduring brief exposure to 1360 degrees Celsius. This makes it ideal for high-temperature, low oxygen partial pressure, and SC-containing environments.
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