Ceramic Radiant Tube

Silicon Carbide Radiant Tube

The silicon carbide radiant tube is the centerpiece of Saint-Gobain Performance Ceramics & Refractories’ range of total burner solutions.

These tubes offer higher productivity coupled with lower energy consumption. The largest available ceramic single ended radiant tube is measuring 3,500 mm in length and with a 300 mm diameter. These are available for straight and single-ended applications.

Silicon carbide radiant tubes can withstand application temperatures up to 1,380°C and can input up to twice as much energy into furnaces as alloy radiant tubes.

Features and Benefits

Radiant Tube


  • Made of robust silicon carbide
  • Operating temperatures up to 1,380°C
  • Long service life
  • Advanced silicon carbide microstructures provide high thermal conductivity and shock resistance
  • Industry-leading diameter and length
  • Suitable for most furnace applications
  • Thin-wall designs increase thermal performance and enable design flexibility
XXL Radiant Tube


  • Long service life
  • High thermal strength
  • Able to outperform metal tubes without any bending
  • Customized production options
  • Reduced furnace running costs
  • Reduced maintenance frequency
  • Use especially for horizontal heat treatment of thick steel sheets


What is the maximum application temperature for Silit® SKD ceramic radiant tubes?

The maximum application temperature is 1,380°C.

What are the maximum dimensions for Silit® SKD ceramic radiant tubes?

The maximum dimensions are 300 mm in diameter and 3,500 mm in length. Radiant tubes can be customized to accommodate customer-specific mounting requirements.

What is the difference between ceramic and metal radiant tubes?

Ceramic radiant tubes made from Silit® provide twice the heat transfer rate (50 kW/m2 – 1,050°C) of a standard metallic radiant tube. Ceramic radiant tubes do not require bending, meaning their service life is longer versus a metallic tube.

What is different between HeatCor™ and a standard recuperator?

The HeatCor™ technology’s use of hollow channels and the resultant larger inner surface area results in an increase of up to 80% efficiency versus a standard ceramic recuperator.

How does PyroCor™ work?

PyroCor™ utilizes a specialized design and variable twists to optimize temperature uniformity in the radiant tube.

What are the material properties of Silit® and Amasic-3D™?

These infiltrated SiSiC high performance, non-porous ceramic materials can accommodate application temperatures of 1,380°C. They also offer excellent thermal strength properties.

What is the minimum wall thickness possible with Silit® and Amasic-3D™?

The thinnest possible wall thickness is approximately 4 mm with Silit® and 2 mm with Amasic-3D™.

What is the difference between Silit® SKD, Silit® SKD-H and Hexoloy®?

The key difference of Silit® SKD, Silit® SKD-H and Hexoloy® is the range of application temperatures which can be accommodated. Hexoloy® is 100% SiC while Silit® has a percentage of silicon in the matrix. This allows Hexoloy® to operate at temperatures exceeding 1,800°C.

Can ceramic radiant tubes be cantilever mounted?

Their high thermal strength allows all ceramic radiant tubes from Saint-Gobain Performance Ceramics & Refractories’ to be cantilever mounted.

Ceramic Radiant Tube


Brochures & Flyers
Burner Solutions

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Burner Solutions
Brochures & Flyers
Heat Treatment

Saint-Gobain Performance Ceramics and Refractories has been designing and manufacturing high performance refractories for demanding atmosphere furnaces for

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Heat Treatment