A Hazardous area is defined as a three-dimensional space where a flammable
atmosphere maybe expected to be present at such frequencies as to require special
precaution for the type and use of electrical apparatus or other potential ignition
sources. Hazardous area will be identified and classified into zone 0, zone 1, and
zone 2.

Identifying Zone 0, Zone 1, and Zone 2 Hazardous Areas
Fundamentally, for an explosion to take place, flammable or explosive gases, vapours, mists or dusts will be present. Then, the level of risk of an explosion is based on the frequency and duration of the occurrence of an explosive atmosphere. This level of risk is represented by classifying the hazardous area as Zone 0, Zone 1 or Zone 2 (for gas, vapour and mist atmospheres) or Zone 21 or Zone 22 for dust atmospheres.

ZONE 0
Explosive atmosphere is Continuously present
Zone 0 is an area in which an explosive atmosphere is present continuously for long periods of time or will frequently occur.

ZONE 1
Explosive atmosphere is Often present
Zone 1 is an area in which an explosive atmosphere is likely to occur occasionally in normal operation. It may exist because of repair, maintenance operations, or leakage.

ZONE 2
Explosive atmosphere may Accidently be present
Zone 2 is a place in which an explosive atmosphere is not likely to occur in normal operation but, if it does occur, will persist for a short period only. These areas only become hazardous in case of an accident or some unusual operating condition.

Rig safe diesel generator can not used in hazardous area, are commonly used in the safe area of the O&G Platform or Facility.

Non-hazardous area: Any area which is not classed hazardous area Zone 0, 1 or 2 is defined as the “Non-Hazardous Area and colloquially as the “Safe Area” although using the term
“safe” could be misleading.

The units require added safety features though not as stringent as units which are used in the Hazardous area zone 2.

Kingway 2 Units Rig Safe ( non-hazardous area ) Diesel driven generator sets mounted in the DNV certified 2.7-1 Skid frame enclosure producing 25KVA @ 0.8 pf,415VAC, 3 Phase +Neutral, 50HZ Output, include ATEX Certified Zone 2 Spark Arrestor, and ATEX Certified Zone 2 Air Inlet shutdown Valve Pass through FAT, load to Client of Brunei, will be used for Shell’s project.