Introduction to the European ATEX directive Explosive atmospheres(10/07/2012)
Directive 9/9/EC defines an explosive atmosphere as a mixture of:a) Flammable substances – gases, vapours, mists or dustsb) With airc) Under specific atmospheric conditionsd) In which, after ignition has occurred, combustion spreads to the entire flammable mixture (NB: with regard to dust, it may be that not all dust is combusted after ignition has occurred)