The electric heating radiant tube's core is ingeniously crafted with U-shaped, axially arranged end-welded resistance wires supported by robust ceramic frames. Without any intermediary shielding, this design ensures optimal heat dissipation. Engineered to operate at a nominal temperature of 1000 degrees, it employs Cr20Ni80 or 0Cr21AI6Nb as the resistance wire material, achieving a surface operational temperature of 1200 degrees. Crafted from high alumina ceramic parts, the support frame complements this remarkable setup. The outer protective sleeve is a marvel of engineering—a cold drawn, seamless thin-walled heat-resistant steel pipe constructed from 1Cr25Ni20Si2 or 1Cr25Ni35Si2. This material endows the tube with superior high-temperature oxidation resistance, exceptional creep strength at elevated temperatures, and commendable carburization resistance. Carefully selected and designed, this radiant tube boasts a high safety factor, operating reliably at temperatures up to 1200 degrees, with the resistance wire crafted from 0Cr27AI7Mo2. Remarkably, it can achieve a surface temperature of 1400 degrees, with a peak short-term working temperature reaching 1250 degrees. The steel jade porcelain support frame is as robust as it is elegant. Encased in a protective sleeve fashioned from a Fe Ni CrAI Re alloy, this tube stands resilient against oxidation, performing unfalteringly at 1300 degrees Celsius and showcasing short-term oxidation resistance at 1360 degrees Celsius. It's an ideal solution for high-temperature, low-oxygen partial pressure, and sulfur-containing environments.
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