A range of tubes are offered with high mechanical integrity and homogeneity together with high thermal conductivity and a wide range of operating temperatures. The original NICARB material has been joined by our CERTS-ZN formulation to extend the operational capability into high thermal inputs required for heating Zinc baths.


The technologists at Ceramco were amongst the first to combine isostatic pressing and nitride bonding technologies to allow manufacture of a range of Immersion Heater tubes based on Silicon Carbide grain.


IHT provide an efficient way to heat holding and process furnaces containing a range of metals without risk of contamination of the bath. They are available in various diameters and lengths.


Power can be supplied by electrical heating elements or the more commonly used recuperative gas fired systems where an internal firing tube directs the flow of combustion products to encourage recirculation, maximise thermal efficiency and avoid uneven temperature distribution.


NICARB – Nitride bonded SiC


NICARB – Nitride bonded SiC provides a range of operational benefits including:


  • Wide range of sizes
  • Extended lifetime as a result of stress free design and homogeneous structure
  • No attack by molten aluminium
  • High thermal conductivity allows lower internal temperatures
  • High mechanical integrity maintained at high operating temperatures
  • Available for electrical or recuperative gas heating systems.
  • Standard sizes and short delivery times available for ex stock delivery

CERTS-ZN Carbon bonded SiC


CERTS-ZN Carbon bonded SiC has been developed to improve performance at the lower operating temperatures associated with Zinc melting and continuous wire galvanizing baths. They extend the range of operational temperatures provided by NICARB IHT.


  • The introduction of flake graphite and protective body glazes precludes nitride bonding, but greatly increases thermal conductivity and reduces thermal stresses associated with high heat transfer.
  • A glaze coating inside and out reduces the risk of oxidation causing low temperature degradation




Ceramco Ltd
Block 12, Vale of Leven Industrial Estate
Dumbarton, Scotland G82 3PD

© 2016 Ceramco Company Registration No. SC 174 224

t +44 (0) 1389 729501