How many pounds of dry chemical are combined with water and AFFF in the Index B classification?

In the context of fire protection and suppression systems, particularly at airports, the Index B classification is crucial for determining the appropriate fire suppression measures for aircraft fires. When using a combination of dry chemical agents, water, and Aqueous Film-Forming Foam (AFFF), the typical formulation includes 500 pounds of dry chemical.

The combination is specifically designed to enhance the suppression capabilities by leveraging the rapid extinguishing properties of the dry chemical agent while utilizing water and AFFF to cool and smother the fire. This balance is essential for effectively combating different types of fires that may occur, particularly involving flammable liquids like jet fuel.

This classification demonstrates adherence to fire safety protocols and efficacy in firefighting strategies, especially in critical environments such as airports where rapid response and effectiveness are paramount for safety. In summary, the 500-pound specification reflects standard industry practice and ensures optimal performance in fire suppression operations.