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DGC offers a comprehensive range of Furnace Inspection Services to the metals smelting, mineral processing, thermal energy, and industrial furnace industries. 

The services are offered in alliance with ADI Industrial Services; a Belgium-based Service Company that has been performing furnace inspections in different industries for more than 25 years.

The Furnace Inspection Services allow for real-time furnace diagnostics and assist operators in assessing the state of furnaces at their working temperatures. The services are mainly based on two techniques; infrared thermography for external inspection and high-temperature furnace endoscopy for internal inspection, this article will focus on high-temperature furnace endoscopy.

High-temperature furnace endoscopy inspections involve real-time, remote visualization of the interior of a furnace during normal operations, enabling the assessment of the state of the refractories inside the unit. Regular inspections can be used to timeously identify severalthe furnace issues; typically before the onset of orthodox, speculative, and lagging performance indicators.

High-temperature furnace endoscopy devices are highly robust and purpose-designed to operate within extremely harsh conditions inside furnaces. The devices can be customized to suit various requirements, with the systems’ small diameter probes, only requiring small openings (as small as 50mm). Choosing suitable device lengths and various vision angles enables enhanced flexibility during inspection.

Furnace Endoscopy showing real time inside a furnace


High-temperature furnace endoscopy is commonly used for the following applications:

  • Furnace bottom and sidewall monitoring to prevent catastrophic furnace runouts

  • Efficient scheduling of furnace maintenance or furnace rebuilds

  • Close monitoring of critical stages of furnaces in their later stages of operation to balance risks with production goals

  • Guiding strategic decisions about furnace operations, e.g. choice of production operations depending on their impact on the health of furnace

  • Objective investment optimizes the action

  • Endoscopy can also be particularly helpful during hot repairs (e.g. for ceramic welding operations).

furnace endoscopy


With routine high-temperature furnace endoscopy inspections, potential problems can be identified and remedied much earlier thereby drastically reducing the number of unplanned refractory maintenance stoppages. Some of the additional benefits of high-temperature furnace endoscopy inspections are summarised below:

  • Harmless non-destructive testing technology

  • Allows for objective audits from a neutral point of view

  • Guided continuous improvement and operational excellence initiatives

  • Cost/benefit ratio is always positive

  • Images are recorded at working temperature; no shutdown required

  • Full range of support services, from audits to repairs for smooth operations

  • Improved energy efficiency, lowering emissions

APPLICATION EXAMPLE: Endoscopy of an Operational Furnace

Using high-temperature furnace endoscopy for visual inspections of the inside of an operational furnace, permitting amongst other possibilities; the identification of defects, monitoring of the burners, and monitoring the flame.

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Dickinson Group of Companies (DGC) was founded in 1910. For comprehensive information about Our Company – History, Vision & Values, Strategy, Global Alliances, Africa Footprint, Our Commitment to Safety, Anti-Corruption Policy, References, and Industrial Solutions, please visit our website.

DGC AFRICA a leader in Asset Integrity Management and Industrial Solutions


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