What is the foam proportioning percentage used for heavy equipment?

The correct foam proportioning percentage for heavy equipment is typically set between 0.50% to 1.0%. This percentage is essential for effectively combating fires involving heavy machinery, as it allows for sufficient foam application to suppress flames while preventing further ignition. At this concentration, the foam generates a blanket that cools the surface of the equipment and prevents re-ignition, making it ideal for the specific challenges posed by heavy machinery fires.

Using a proportioning percentage that is too low may not provide adequate coverage and fire suppression, while higher percentages could lead to excessive foaming that may not be needed for most scenarios involving heavy equipment. Thus, the specified range ensures an effective balance between effectiveness and efficiency in foam application for controlling heavy equipment fires.