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Radiant tubes for heat treatment furnaces

2M Foundry manufactures radiant tubes for heat treatment furnaces, steel plants and galvanizing lines. These components are used in indirect heating processes, where uniform and controlled heat transfer inside the furnace is required.
They operate according to the principle of thermal radiation: the heat generated by an internal burner, generally gas-fired, is uniformly transferred towards the outside of the tube, heating the material without direct contact with the flame.

This system allows the furnace atmosphere to be controlled and reduces oxidation of the treated material.
Radiant tubes can also be manufactured according to drawings and the specific operating conditions of the plant, with the possibility of adapting them to different dimensional configurations and technical requirements.

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Operating temperatures and performance

Radiant tubes are designed to operate in a temperature range between 750°C and 1150°C, maintaining structural stability and continuous operation even during prolonged production cycles.

Types of radiant tubes

Depending on plant requirements and furnace configurations, radiant tubes can be manufactured in different geometries:

I-shaped
U-shaped
W-shaped
P-shaped

These configurations allow the heating system to be adapted to the specific requirements of the furnace and the production process.

Recuperative radiant tubes

2M also manufactures recuperative radiant tube solutions equipped with internal elements that allow heat recovery from combustion fumes. The recovered heat is reused in the heating process, helping improve the energy efficiency of the plant.

Materials and production process

2M produces radiant tubes in refractory stainless steel, selected to withstand high temperatures, corrosion and thermal shock. Production is carried out through centrifugal casting, a process that makes it possible to obtain:

high material compactness
optimized metallurgical structure
absence of porosity and internal defects
greater mechanical resistance and long service life

This production method is a distinctive element in ensuring superior reliability and performance.

Applications

Radiant tubes are used in many sectors of the metallurgical and heat treatment industries:

steel industry
galvanizing lines
continuous annealing furnaces
steel and aluminium processing plants
hot rolling mills

Advantages of centrifugally cast radiant tubes

The use of centrifugally cast components provides several operational advantages:

uniform temperature distribution
greater control of the furnace atmosphere
reduced oxidation of the treated material
wide choice of alloys according to the application
long service life and reduced maintenance costs