Class D fires only involving combustible metals – magnesium, sodium (spills and in depth), potassium, sodium-potassium alloys uranium, and powdered aluminum.
What causes a type D fire?
Class D fires involve combustible metals – especially alkali metals like lithium and potassium, alkaline earth metals such as magnesium, and group 4 elements such as titanium and zirconium. … Certain metals burn in contact with air or water (for example, sodium), which exacerbates this risk.
What happens if you put water on a Class D fire?
Class D fires are very rare and occur when metal ignites. These are rare because most metals require high temperatures to ignite but alkali metals like aluminum, potassium, and magnesium can ignite when exposed to water or air. You therefore, cannot use water on these fires and can only use a dry powder extinguisher.
What is the best defense against fire?
As always, the best defense against a fire is to be prepared. Take a moment to look at your fire extinguisher.
What Colour is a Class D fire extinguisher?
From guidance published in December 2020 by FIA (Fire Industry Association) it states: “The major change is the colour‐code for class D Powder extinguishers (for metal fires) is changing from Blue to Signal Violet.