HAZARDOUS AREA ZONES

Petrel specialise in manufacturing luminaires for use in Hazardardous Areas.

Hazardous areas are classified into zones, based on duration and frequency of an explosive atmosphere.

Gas:

Zone 0   A place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of gas, vapour or mist is present continuously or for long periods or frequently. 

Zone 1   A place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of gas, vapour or mist is likely to occur in normal operation occasionally.

Zone 2   A place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of gas, vapour or mist is not likely to occur in normal operation but, if it does occur, will persist for a short period only.

Dust:

Zone 20   A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is present continuously, or for long periods or frequently.

Zone 21   A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is likely to occur in normal operation occasionally.

Zone 22   A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is not likely to occur in normal operation but, if it does occur, will persist for a short period only.


ATEX

Petrel operates in accordance with the ATEX directive. This defines the mandatory requirements for manufacturers and users of all hazardous area equipment sold in, but not restricted to, the European Union which must have applicable ATEX certificates.

  • ATEX is an EU directive and provides for the safety of employees working in areas of potentially explosive atmospheres.
  • These areas are classified into various zones according to the degree of risk, primarily from Gas or Dust hazards.
  • For product manufacturers it determines the standards for equipment installed in such areas to ensure safe operation by covering: Concepts of protection;  Equipment construction and testing standards; Equipment Identificationcertification label.

 

Equipment Marking

The marking of the equipment includes the following typical data:

Ex II 2 G, Ex II 3 D
Where II is the equipment group; 2 is the category for use (see table for equivalent zone); G (or D) is the type of explosive atmosphere - G = gas, vapour or mist; and D = Dust

IIC T4 Ta = -20°C to + SS°C
IIC refers to the gas group, and where the T class will vary against ambient

TS Ta = -20°C to + 2S°C
The T class marking for dust may also be shown if different to gas

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