Explosion hazards of powders, dusts and nanoparticles – Standardized testing services

Explosion hazards of powders, dusts and nanoparticles – Standardized testing services

The assessment of the flammability and explosivity characteristics of dusts and powders produced, transported and stored on industrial sites is necessary for the health and safety of workers. The data acquired will enable us to propose effective technical and organizational measures to control the risk.

ISSeP has a laboratory for the analysis of combustible powders, which helps industrialists to develop their safety policy by proposing standardized tests.

Laboratory for flammability and explosivity of reactive powders (ISSeP)

An explosion is…


Source Beaulier

Services : characterization of combustible organic and metallic powders using standardized tests

ISSeP determines the ignition sensitivity and explosion severity of microscopic and nano-sized dusts and powders.

We offer you the characterization of carbonaceous and metallic powders :

Flammability: ability to ignite

  • EMI: Minimum ignition energy (EN 13821)
  • TMI: Minimum ignition temperature of a dust cloud (EN 50281-2-1)
  • TMI: Minimum Ignition Temperature  in 5 mm layer  (EN 50281-2-1)
  • LEL: Lower Explosive Limit (EN 14034-3)

Explosivity: violence generated by the explosion

  • Pmax: Maximum pressure reached (EN 14034-1)
  • (dP/dt)max: Maximum pressure rise rate (EN 14034-2)
  • Kst: Characteristic constant Kst = (dP/dt)max * V1/3
  • OLC: Oxygen Limit Concentration (EN 14034-4)

Equipment for studying sensitivity to ignition (Standardized tests)

EMI  → Hartmann tube

LEL → 20 L sphere

TMI cloud → Godbert-Greenwald oven


Godbert-Greenwald oven (INRS)          20 L sphere (ISSeP)            Hartmann tube (Kühner)

Equipment for assessing explosion violence (Standardized tests)


20-liter sphere (ISSeP)                              Pressure vs. time curve


(dP/dt)max                                         Kst: Characteristic constant (calculated) Kst = (dP/dt)max * V1/3

ATEX zoning       

  • Risk assessment, ATEX zone classification

ISSeP classifies zones where gaseous and  dusty ATEX are likely to occur (IEC 60079-10-1 and -2).

Nano1   nano2   nano3

Contact: Tiécoura SINABA – t.sinaba@issep.be – 065/610819 – 0499/668448