The heart of the electric heating radiant tube is ingeniously designed with U-shaped axially arranged, end-welded resistance wires, supported by high-quality ceramic frames. This innovative design ensures unobstructed heat dissipation between the inner core and the outer protective sleeve. Boasting an impressive rated working temperature of 1000 degrees, the resistance wires are crafted from Cr20Ni80 or 0Cr21AI6Nb materials, achieving a surface working temperature of 1200 degrees. Constructed from high alumina ceramic parts, the support frame enhances durability, while the outer protective sleeve, made from cold drawn seamless thin-walled heat-resistant steel pipe (using 1Cr25Ni20Si2 or 1Cr25Ni35Si2), exhibits excellent high-temperature oxidation resistance, high creep strength, and resilience against carburizing. The meticulously selected design materials ensure a high safety factor. For elevated performance, the electric radiation tube can operate at a rated temperature of 1200 degrees with its 0Cr27AI7Mo2 resistance wire, reaching a surface temperature of 1400 degrees, and short-term peaks of 1250 degrees. The support frame, crafted from steel jade porcelain, pairs with an outer protective sleeve made from Fe Ni CrAI Re alloy, boasting high oxidation resistance and capable of performing in oxidizing environments at 1300 degrees Celsius with short-term resistance at 1360 degrees Celsius. This makes it ideal for high temperature, low oxygen partial pressure, and sulfide-containing conditions.
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