Class D Fires
Class D fires involve combustible metals such as magnesium, titanium, and sodium, requiring specialized extinguishing agents for effective suppression.
What are Class D Fires?
Class D fires are fires that involve combustible metals, which can ignite and burn at extremely high temperatures. These types of fires are particularly hazardous due to the unique properties of the metals involved, which can react violently with water and other common extinguishing agents. Understanding Class D fires is crucial for safety professionals and firefighters, as they require specialized techniques and equipment for effective suppression.
Key Characteristics
- Combustible Metals: Common materials include magnesium, titanium, sodium, potassium, and lithium.
- High Temperatures: Class D fires burn at temperatures that can exceed 1,200 degrees Celsius (2,192 degrees Fahrenheit).
- Reactivity: Many combustible metals can react with water, producing flammable hydrogen gas, which can exacerbate the fire.
Common Applications and Examples
Class D fires are typically associated with industrial settings where metals are processed or used, such as:
- Metal fabrication shops
- Aerospace manufacturing
- Foundries
- Chemical processing facilities
For instance, magnesium fires can occur in the production of aircraft components, while sodium fires may arise in chemical laboratories.
Important Considerations
Firefighters and safety personnel must be equipped with the right tools to combat Class D fires. Water should never be used as an extinguishing agent, as it can lead to explosive reactions. Instead, dry powder extinguishers specifically designed for metal fires, such as those containing sodium chloride or graphite, should be utilized. Training in the proper handling and extinguishing of Class D fires is essential for anyone working in environments where combustible metals are present.
