Hazardous Area Zone (As per IEC 60079-10-1)


Hazardous area (on account of explosive gas atmospheres) called “hazardous locations”. An area (3-dimensional region or space) in which an explosive gas atmosphere is or may be expected to be present, in quantities such as to require special precautions.

Hazardous areas are classified into 3 Zones based upon the frequency of the occurrence and duration of an explosive gas atmosphere, as follows:

Zone 0

Area in which an explosive gas atmosphere is present continuously or for long periods or frequently.

Zone 1

Area in which an explosive gas atmosphere is likely to occur in normal operation occasionally.

Zone 2

Area in which an explosive gas atmosphere is not likely to occur in normal operation but, if it does occur will persist for a short period only.

Non hazardous area (safe area)

An non hazardous area is an area in which an explosive atmosphere is not expected to be present

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