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WHAT IS ZONE 2?

A Zone 2 area is classified as an atmosphere where a mixture of air and flammable 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.

These are typically storage areas but can also be process areas.

For Zone 2 applications, we predominantly use active gas detection but when required can covert equipment using passive protection technology. We offer active gas detection with system6000 and passively protect equipment using Ex-tec 3G for electric materials handling equipment, and Euromech 3G for diesel equipment.

Pyroban are able to convert equipment to Zone 2 standards for use across the world. We are able to meet the following legal certifications:

  • ATEX – Europe
  • GB – China
  • NEC - USA
  • IECEx – International

The use of explosion protection equipment in a potentially hazardous area is something which is a requirement from both the user and supplier of the Ex-proof equipment.

For example, European ATEX legislation has two different directives for the user and the supplier:

ATEX 1999/92/EC - For industries that operate with potentially explosive atmospheres

ATEX 1999/92/EC requires companies to manage the risk and the process safely. Companies should:

  • Prevent the formation of explosive atmospheres in the workplace OR avoid the ignition of explosive atmospheres
  • Conduct a hazardous area risk assessment including the likelihood of explosive atmospheres and a source of ignition
  • Classify the workplaces into hazardous area Zones depending on the frequency and time that an explosive atmosphere is present in the form of gas, vapour, powder or dust. For example:
    • Zone 1 (high risk gas/vapour)
    • Zone 2 (medium risk gas/vapour)
    • Zone 21 (high risk powder/dust)
    • Zone 22 (medium risk powder/dust)
  • Mark areas with signs at point of entry
  • Create and maintain an explosion protection document
  • Select ATEX 2014/34/EU compliant equipment according to the intended Zones

ATEX 2014/34/EU (previously 94/9/EC) - For industries that supply equipment into hazardous area

Equipment for operation in hazardous areas must comply with the requirements of ATEX 94/9/EC Directive and be suitably protected.

Equipment is built to a level of protection known as a category which matches the risk. (Category 2G/Zone 1, Category 3G/Zone 2, Category 2D/Zone 21, Category 3D/Zone 22)