Which types of ATEX zones can be distinguished and what do they mean?

Answer:

ATEX talks about danger zones. The atmosphere and the prevailing condition in the workplace are crucial for installation methods of the used materials and the choice of equipment. Therefore, it is important to make a zone classification of areas that might be dangerous (for the purpose of gas- and explosion hazard). These potential dangerous areas are based on the frequency and the duration of an explosive atmosphere:

  • Zone 0, 1 and 2: at risk of a gas explosion (a mixture of flammable gas and vapour or mist).
  • Zone 20, 21 and 22: at risk of dust explosion (a cloud of flammable dust).


The lowest number indicates the most dangerous zone. As the danger zone becomes heavier, the stricter the demands become on the design of the work environment, the application, the use of equipment and security systems.

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