What is ATEX?
ATEX (from the French ATmosphères EXplosibles) is a European classification system used to identify hazardous areas where explosive atmospheres may form due to the presence of flammable gases, vapours, mists, or dusts. Usually used in industries such as oil & gas, chemical processing, manufacturing, and food production, helping ensure that equipment used in these environments are certified and safe.
Understanding ATEX Zones
Hazardous areas are divided into zones based on the likelihood and duration of an explosive atmosphere:
Zone 0 – High-risk areas where an explosive atmosphere is present continuously or for long periods. Common in enclosed spaces like fuel tanks. Equipment must meet the highest safety standards (Category 1G).
Zone 1 – Areas where explosive atmospheres are likely during normal operations, such as near valves or pumps where leaks may occur occasionally. Equipment must be Category 2G rated.
Zone 2 – Lower-risk areas where explosive atmospheres are unlikely, and if they do occur, it’s only for short periods. These areas are often well-ventilated and require Category 3G rated equipment.
ATEX Zones Explained
Rockall Safety have created a document outlining the different ATEX zones. To download this document, please click the button below.
