Which part of a bulk storage plant is classified as Class 2, Zone 2?

In a bulk storage plant, Class 2, Zone 2 areas are characterized by the potential for the presence of hazardous atmospheres due to flammable gases, vapors, or mists during normal operation or under a fault condition. This classification helps ensure safety protocols are properly identified for areas where these risks are present.

The drainage ditches, separators, and impounding basins are included in this classification because they might contain or direct the flow of any leakages from stored materials, creating a risk factor that can lead to a hazardous atmosphere. These areas are designed to manage spills and prevent the accumulation of hazardous substances, making them subject to regulations that pertain to safety zones.

In contrast, billboards and signage are not associated with any hazardous interactions; emergency exits and pathways do not inherently create environments where flammable atmospheres could develop; and control rooms and offices are typically situated in areas where their operation is safeguarded from exposure to hazardous substances, thereby placing them outside of Class 2, Zone 2 specifications. Understanding the classification and implications of each area helps ensure personnel safety and compliance with safety regulations.