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The Use of Combustible Gas Detection in Hazardous Locations: Additional Safety Precautions Around Flammable Gas or Vapors

This article explores the use of combustible gas detection as a means of supplementary protection in hazardous locations. The use of combustible gas detection in the context of a hazardous-area classification design is reviewed, and its use as a means to interlock ignitioncapable equipment is discussed. The International Electrotechnical Commission (IEC) and North American codes, standards, and recommended practices are referenced. Case examples are provided to illustrate the use of concepts presented.