Zone Classification for Hazardous Areas | Hazardous Area Classification

Zone Classification
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Zone Classification

Zone 0 :- Harmful & Toxic gases are always present in NORMAL conditions.

(Also known as Brown Field)

Example :- 30 meter radius of live flare

Zone 1 :- Harmful & Toxic gases are occasionally present in NORMAL conditions.

Zone 2 :- Harmful & Toxic gases are present in ABNORMAL conditions.

Example :- In case of live pipe rupture

Unclassified :- Area free from Harmful & Toxic gases

ADNOC INTERVIEW Questions & Answers

Zone classification
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