Methods of Explosion Protection in Hazardous Areas

Several methods are used to protect process and control equipment used in hazardous areas in many industries. The main goal of these protection methods is to eliminate one of the components in the fire triangle to prevent an explosion. The most common hazardous area protection methods in the process control industry are:

1. Containment
2. Energy limitation
3. Avoidance

Other methods of equipment explosion protection include exclusion and dilution.
 Hazardous Area Classification

Containment Methods
The containment method is used to contain an explosion within the equipment enclosure. Thus, sparks or flames will not leak into the hazardous atmosphere and cause another fire or explosion. Containment is often used with spark-producing parts, such as switch gears, control boards, or transformers. An explosion-proof enclosure has the

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