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Explosion tests for DSEAR

By testing the particles of the material being processed, we can better determine suitable protection measures against explosions. Often, dust testing is the first stage when it comes to ensuring your site is fully protected and ATEX/DSEAR compliant.

The dusts will have different explosive properties that contribute to the hazardous nature of the material. These might be self-heating (leading to spontaneous combustion), rapid spread of fire, high ST classification (strong or very strong explosion class), sensitivity to electrostatic spark ignition or low ignition temperature.

The certified laboratory undertakes dust testing work for a wide range of companies and industries, such as pharmaceutical and chemical products, coal dust, grain dust, foods products such as flour and sugar, wood products produced by the particle board industry, sawdust, metal dusts and increasingly biomass fuels and dried waste from the water treatment industry.

Dust Testing Laboratory

We are a UK based company offering a full range of dust explosion tests to determine the hazardous properties of particulates. For those materials where the explosive nature of the dust is in doubt, our classification test to EN ISO/IEC 80079-20-2 exposes the material to 4 different ignition sources to determine flammability; 10KV electric spark ignition, hot coil ignition, high temperature ignition at 1000 degrees Centigrade and pressure vessel enclosure with electrically operated chemical igniters. The classification test is the essential first step in explosibility testing.Our experienced laboratory staff can advise on which tests are required to ensure your company complies with ATEX or DSEAR.

UN & EN Testing Standards

The majority of our dust explosion tests and dust ignition tests are carried out to UK, European and ISO international standards. However, some tests are available to US (ASTM) standards – please contact us for further details.By better understanding the explosion hazard and nature of the combustible dust, suitable preventative and protective measures can be employed to mitigate the risk – see our guide to DSEAR for further details.


What tests do I need to have carried out?

If the flammability of the dust / powder is unknown, start with a classification test. If the powder is classified as combustible, then consider the following tests based upon potential ignition sources etc:

Basis of safety
Avoidance of ignition sourcesTest Action
Dust controlLower explosible limitPlant should be operated with low levels of dust present e.g. use dust suppressed materials
Electrostatic sparkMinimum ignition energyInfluences the choice of plant materials (conductors / non conductors) earth bonding and personnel antistatic precautions
Explosion containmentPmax and Kst explosion indices testVerify containment and explosion isolation design is based upon suitable explosion data
Explosion prevention methodTestAction
Explosion protection methodTestAction
Explosion suppressionPmax and Kst explosion indices testVerify suppression design is based upon suitable explosion data
Explosion ventingPmax and Kst explosion indices testVerify plant design is adequate for the materials being handled
Hot surfacesLayer ignition temperature and minimum ignition temperatureSpecifies equipment surface temperature limits
Oxygen controlLimiting oxygen concentrationPlant should be operated under an inert gas such as nitrogen. Minimum permissible oxygen concentration (MPOC) should be determined based on the test result inert gas control system plant layout and safety margin required.
Self heatingIsothermal basket testSpecifies maximum storage size and configuration storage temperature and storage time


We are waiting to discuss your explosion safety requirements, so don’t hesitate to get in touch. Whether you would like to receive a quotation or you are just looking for more information, we are here to help.




0208 243 8914