radiant tubes

RADIANT TUBES FOR HIGH TEMPERATURES

INNOVATIVE INEX PRODUCTS

Sitec Srl markets and sells radiant tubes produced by Inex, a leader in the industry. These composite radiant tubes (silicon carbide and silicon matrix) are produced using an innovative, simple but effective manufacturing process which implicates high performance at highly competitive costs.
Inex branded products for high temperatures
The classic radiant tubes in nickel alloys or in monolithic ceramic may not last as long due to several factors:

  •  Thermal shock
  • Vibrations
  • Creep
  • Melting
  • Oxidation
  • Carburation


In contrast, the Inex products, from direct flame radiant tubes to finned tubes etc, are characterised by a very high degree of thermal shock resistance which allows:

  •   installation in furnaces with operating temperature above 950°
  • reduction of heating times equal to 100%, reaching a temperature of 985 ° in 4 hours rather than the standard requested 12.

THE VARIOUS APPLICATIONS OF INEX RADIANT TUBES

The radiant tubes produced by Inex, successfully used since 1988 around the world, are ideal for thermal treatment in various industrial processes such as:

  •     Annealing
  • Cementation
  • Solubilisation
  • Toughening
  • Carbonitriding
  • Ferritic carbonitriding
  • and with the following atmospheres:
  • Endothermic
  • Gas enriched with carbon
  • Gas enriched with ammonia
  • Nitrogen
  • Endothermic / Ammonia (50/50) mixtures

KEY PHYSICAL PROPERTIES

Density 2.6 g/cc
Porosity 0%
Thermal expansion 4.2 x 10-6/°C
Resistance  
Room temperature 6.00 Kg/mm2
1000 ° C 6.05 Kg/mm2
1,250° C 7.10 Kg/mm2
1350 ° C 7.40 Kg / mm2
Heat transmission 7.8 Kcal/h/cm2

STANDARD SIZES

25.4 mm diam. 3.2 mm thickness
38.1 mm diam. 3.2 mm thickness
60.3 mm diam. 3.2 mm thickness
70.0 mm diam. 3.2 mm thickness
82.5 mm diam. 3.2 mm thickness
114.3 mm diam. 3.2 mm thickness
130 mm diam. 3.2 mm thickness
152 mm diam. 3.2 mm thickness

Larger sizes are under development and requests for special sizes may also be taken into consideration.

RADIANT TUBES

direct flame radiant tubes Bollate
Direct flame radiant tubes or with vertical or horizontal recuperator

INEX TUBE IN SI / SIC COMPOSITE

composite tubes Bollate
The INEX tube in Si / SiC composite, on the left, has been tested for 360 hours. The one in Alloy 600, on the right, has been tested for less than an hour.

Test conducted by Hi-Tech Ceramics, Alfred, NY, USA.

U-SHAPED RADIANT TUBE

heating pipes for high temperatures Bollate
Direct flame radiant tubes or with vertical or horizontal recuperator. For available sizes see the table opposite.

AVAILABLE SIZES OF U-SHAPED RADIANT TUBES

External diameter 114 mm
Internal diameter 105 mm
Wheel base 229 mm
   
External diameter 152 mm
Internal diameter 142 mm
Wheel base 229 mm
   
External diameter 152 mm
Internal diameter 142 mm
Wheel base 305 mm

FINNED TUBES

sale of radiant tubes, Bollate
Special shaped tube with spiral fins designed and manufactured exclusively by Schunk-Inex with resistance up to temperatures of at least 1,350° C.
The company's finned tubes can withstand exceptionally high temperatures for a long period of time and increasing combustion efficiency, while simultaneously ensuring a signficant saving. Features:

 
  •    high operating temperatures, up to 1,350 ° C
  • long-lasting tubes
  • reduction of gas consumption
  • improvemed heat recovery
  • improved combustion efficiency
  • proven savings

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