Radiant Tube

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Radiant Tube


a heater consisting of a tube made of either high-temperature steel or corundum, in which a gaseous (or sometimes liquid) fuel is fired. Heat is transmitted by radiation from the outer surface of the heated tube to the articles being heated. Radiant tubes are installed in furnaces used for the heat treatment of metal articles that must not come into contact with the combustion products of fuels (heating in controlled atmospheres or in air). Tubes made of metal are used for heating articles up to 950°C; those made of corundum are used for treatment up to 1200°C. The diameter of the tube varies from 60 to 200 mm, and the length of each branch may be up to 2.5 m.

Radiant tubes are classified according to their construction. The simplest is a vertically or horizontally positioned straight tube with a burner mounted at one end and an outlet for combustion products at the other. Improved types of multibranch radiant tubes, designed to recover the heat of the combustion products, are shown schematically in Figure 1.


Spravochnik konstruktora pechei prokatnogo proizvodstva, vol. 1. Edited by V. M. Tymchak. Moscow, 1970. Pages 411–14.
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For a coarse initial mesh for the radiant tube assembly with a height of 12 ft (3.66 m) above the floor, the total number of solid, fluid, and partial cells was approximately 1 million cells or fewer.
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The known low intensity radiant tube heaters each consist of a fuel burner which is attached to one end of a steel radiant tube and it is this type of heater that was used in the present study.
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Features and benefits are detailed, along with technical specifications and applications for the company's line of low intensity u-tube and unitized straight radiant tube heaters, ceramic heats and floor models.
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Following an investigation into the options, taking into account whole-life costing, radiant tube heating was found to be the best solution for long-term value.
A four-page brochure describes a range of 19 unitized low-intensity radiant tube heaters ranging in capacity from 40,000 to 250,000 btu/ hr.
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Limited Tenders are invited for Supply of furnace radiant tube hanger support for 4f-01
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