OUR SOLUTIONS: DUST TESTING

Burning Behaviour Testing

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Our UK laboratory generates burning behaviour test data for your combustible dust and powders. This dust explosion test is conducted to assess the behaviour (severity) of combustion propagation through a material deposit when ignited by an external ignition source.

Burning Behaviour Test

The Sigma-HSE Advantage

Sigma-HSE is your single solution provider for a full range of combustible dust & powder flammability testing. Our dedicated team of experts is committed to helping you ensure that your dusts and/or powders will not generate a combustible dust explosion so you can maintain workplace safety and comply with the regulators.

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Frequently asked questions

VDI 2263 and BS EN 17077

The burning behaviour test method is conducted to assess the behaviour (severity) of combustion propagation through a material deposit when ignited by an external ignition source.

A small strip is formed onto a heat-resistant, non-porous plate and ignition trials are performed using a hot (1000 °C) platinum wire. The burning behaviour is numerically rated from 1 (material does not ignite) to 6 (supports rapid combustion) in accordance with the test standards characterisation table. The rating is known as “CC” or Combustibility Class and testing is performed at ambient and elevated environmental temperature conditions.

Burning behaviour data provides information on how materials react when exposed to fire or heat. This test data enables clear categorisation for materials.

Type of Reaction CC Reference Product
No spreading
of fire
No ignition 1 Table Salt
Brief ignition and rapid extinction 2 Tartaric Acid
Localized combustion or glowing with practically no spreading 3 Lactose
Fire spreads Glowing without sparks, (smouldering) or slow decomposition without flame 4 Tobacco
Burning with flame or spark generation 5 Sulphur
Very rapid combustion with flame propagation or rapid decomposition without flame 6 Black Powder

When the burning behaviour of solid material is known, fires or explosion dust hazards caused as a result of the introduction of open flames, hot embers or friction heat (on bearing failure) can be predicted and then avoided or mitigated. It also can be used as a screening tool to highlight the flammability requirements of materials that should be classified as a ‘flammable solid’ for safe handling and dangerous goods transportation.

How to get your materials tested

Receive quick and accurate testing data in just a few simple steps

Contact us

Get in touch with one of our experts so we can learn more about your specific process, unit operations and combustible dust testing requirements. We'll then generate and send you a customised quote for the necessary test methods.

Prepare & ship

Prepare your material samples and ship them to one of our globally accredited laboratories (UK or India).

Analysis & Reports

Once we've received your samples, we'll begin testing and analysing. We'll then create and send you an actionable in-depth report detailing the potentially hazardous properties of your materials.

Post-project support

If you need support after receiving your report, our after-project support team will be on hand to assist you with any questions you may have.

Discover our range of combustible dust testing methods

We undertake the following combustible dust and powder tests to simulate full scale process, and process upset conditions. ​

Dust Combustibility (Group A/B)

BS EN ISO IEC 80079-20-2
ISO/IEC:17025 Accredited
Test conducted to assess whether dust will form a flammable atmosphere or support flame propagation when dispersed as a dust cloud in the open air.
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Minimum Ignition Energy (MIE)

BS EN ISO IEC 80079-20-2
ISO/IEC:17025 Accredited
Test conducted to determine the lowest spark energy that can ignite a dust when dispersed in the air as a dust cloud.
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Minimum Ignition Temperature (MIT)

BS EN ISO IEC 80079-20-2
ISO/IEC:17025 Accredited
Test conducted to determine the lowest temperature at which a hot surface area will ignite combustible dust when dispersed in air.
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Layer Ignition Temperature (LIT)

BS EN ISO IEC 80079-20-2
ISO/IEC:17025 Accredited
Test conducted to determine the lowest temperature at which a hot surface will ignite a combustible dust when settled as a dust layer.
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Explosion Severity Test (Pmax/KST) ST Classification

BS EN ISO IEC 80079-20-2
ISO/IEC:17025 Accredited
Test conducted to determine the maximum pressure (Pmax), maximum rate of pressure rise (dP/dt)max and the dust constant Kst value of an ignited dust cloud.
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Minimum Explosible Concentration (MEC)

BS EN 14034 part 3
ISO/IEC:17025 Accredited
Test is conducted to determine the minimum quantity of combustible dust dispersed in the air, as a cloud that will form a flammable atmosphere.
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Limiting Oxygen Concentration (LOC)

BS EN 14034 part 4
ISO/IEC:17025 Accredited
Test determines the minimum quantity of oxygen that would enable combustible dust in air to ignite when in contact with an ignition source.
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Test your explosive dust and powders for dust combustibility

Whether your process uses wood dust, coal dust or metal dust, getting your hazardous materials tested is an important step to prevent a combustible dust explosion, flash fire or other process-related hazards. Get in touch to learn more about how we can assist you in keeping your process plant and unit operations safe from combustible dust and powder explosions.
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