ATEX Applications

An ATEX zone is a classification system used to define areas where there is a risk of explosive atmospheres due to the presence of flammable gases, vapors, mists, or combustible dusts. It is part of safety regulations, particularly in Europe, to ensure appropriate equipment and procedures are used to prevent explosions in hazardous environments.

ATEX Zone

Type of Atmosphere

Likelihood of Explosive Atmosphere

Example Areas

Zone 0

Gases/Vapors

Continuously present or present for long periods

Inside tanks, reactors, or process vessels

Zone 1

Gases/Vapors

Likely to occur during normal operation

Near filling points, valves, or pipelines

Zone 2

Gases/Vapors

Unlikely in normal operation, and if it occurs, brief

Areas around Zone 1, ventilation outlets

Zone 20

Dust

Continuously present or present for long periods

Inside silos, mills, or hoppers

Zone 21

Dust

Likely to occur during normal operation

Dust-handling systems, near conveyor systems

Zone 22

Dust

Unlikely in normal operation, and if it occurs, brief

Surroundings of Zone 21, storage areas