Which Hazardous Area Classification method benefits my company?


Which Hazardous Area Classification method benefits my company?

Brian Schneider

Canary HLE President,
Hazardous Locations industry expert

There are two types of methodologies for conducting a Hazardous Area Classification (HAC):

  1. PRESCRIPTIVE: find a similar installation description within the Standards and assign the classification accordingly. This is the least expensive in terms of costs of conducting the HAC but may have significant costs associated if the electrical equipment currently in use is not rated for the area.
  2. CUSTOMIZED: evaluate the site by collecting measurements including air flow and room dimensions; review building drawings, schematics, P&ID, etc. Download the data into software programs that 1) convert the building into a 3D drawing, then 2) conduct computational fluid dynamics (CFD) modelling. This allows for the visualization of air movements around the sources of release.  The HAC is then assigned using this information. Our CompEx Ex12 courses illustrate how CFD modelling works.

The reason that many Canary HLE clients choose the customized approach is due to the accuracy and the potential cost savings with regard to electrical equipment. In the case of equipment already installed, or if new equipment is being installed, it will have to be rated for the area. If the installed equipment is not rated for the area, it will have to be replaced; in many cases this is a very costly endeavour.

Canary HLE is one of very few companies that apply the customized methodology.

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