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Divisions
Divisions are used to define the degree of hazard by determining the explosive or ignitable substance's expected concentration in the atmosphere.
- Contains substances under normal conditions
- Contains substances under abnormal conditions
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Division 1 areas must be surrounded by Division 2 areas
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Zones
Zones are used to define the degree of hazard by determining the explosive or ignitable substance's expected concentration in the atmosphere.
- Contains substances under normal conditions (Continuously)
- Contains substances under normal conditions (Intermittently)
- Contains substances under abnormal conditions
Process automation industries often contain both flammable gases and ignitable dusts, making area classification of Division 1 and Division 2 locations an important task.
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