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The Australasian Oil and Gas Expo

Extreme Products will be at the Perth Convention and Exhibition Centre for The Australasian Oil and Gas Expo.
23rd - 25th February 2011 Stand S16

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Unit 2, 30 Pilbara St
Welshpool 6106, WA

Ph: +61 (0)8 9366 2400
Fax: +61 (0)8 9366 2409

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What is an Ex area and Ex equipment?

Ex areas can be known by different names such as Hazardous Locations, Hazardous Areas, Explosive Atmospheres, and the like and relate to areas where flammable liquids, vapours, gases or combustible dusts are likely to occur in quantities sufficient to cause a fire or explosion.  As such, special precautions for the construction, installation and use of potential ignition sources are required.

The use of any equipment or tools in these areas is strictly controlled through various protection techniques to enable the operators to undertake maintenance and operations in the vicinity of hazardous materials. This reduces the possibility of ignition being caused by the tools or equipment being operated within the hazardous area.Equipment that is deemed suitable for use in these ares is termed Ex equipment.

Conditions required for an explosion

An explosion will only occur when three basic conditions are present:

  • Explosive material  (fuel)
  • Oxygen / air
  • Sources of ignition

Remove any one of these basic conditions and an explosion will not occur.

Major industries  that could be at risk include oil, gas, petroleum refineries, underground mines, chemical plants, sewerage treatment and grain handling. Other industries include spray painting shops, aircraft hangars, petrol depots, terminals and garages.

Note: At the time of writing, Australian Standards had endorsed the adoption of the IEC 60079 gases and vapours and IEC 61241 dust series of standards as joint Australian / New Zealand Standards. In the new series of standards there is no reference to Class I and Class II areas. The different zones are identified as zones 0, 1 and 2 for explosive gas atmospheres and zones 20, 21 and 22 for explosive dust atmospheres.

Note: Standards Australia prepares, publishes and maintains Australian Standards and in the case of hazardous areas, looks at all aspects of implementing standards that affect the certification, testing, installation and maintenance of  equipment in these areas. Before undertaking any work in potentially hazardous areas, operators should consult with the appropriate Australian Standard to ensure their work is conduucted in accordance with the appropriate standards. These standards can be purchased from Standards Australia,

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