2019 © Fire-Alert HHM a subsidary of First4Safety Inc. 

nfpa_logo..png
CFAMember.png
abseal-h-canlogo.png
ComplyWorks_Logo.png
Small_halton hills chamber of commerce C
  • Black Facebook Icon
  • Black LinkedIn Icon

D FIRE EXTINGUISHER INFORMATION

 

A Class D fire extinguisher is used on combustible metals, such as magnesium, titanium, sodium, potassium and sodium-potassium alloys, etc., which require an extinguishing medium that does not react with the burning metal.

Water should never be used to extinguish a Class D fire as it will actually serve to energize the flames, potentially spreading the fire and creating additional heat and damage . The oxygen that fuels these fires must be displaced in order to smother the flames. This is achieved with dry powder extinguishing agents in a Class D fire extinguisher. These agents can effectively suppress these fires include graphite in powder form, or sodium chloride in granular form.

It is important to have proper training in order to effectively and safely use a Class D fire extinguisher.

Extinguishers that are suitable for Class D fires should be identified by a five-point star containing the letter "D."

What the A B C D ratings mean on D Fire Extinguishers

“A” GARBAGE–WOOD–PAPER

“A” GARBAGE–WOOD–PAPER

Fire extinguishers with a Class A rating are effective against fires involving paper, wood, textiles, and plastics. The primary chemical used to fight these fires is monoammonium phosphate, because of its ability to smother fires in these types of materials.

“B” LIQUIDS

Fire extinguishers with a Class B rating are effective against flammable liquid fires. These can be fires where cooking liquids, oil, gasoline, kerosene, or paint have become ignited. Two commonly used chemicals are effective in fighting these types of fires. Monoammonium phosphate effectively smothers the fire, while sodium bicarbonate induces a chemical reaction which extinguishes the fire.

“C” ELECTRICAL EQUIPMENT

Fire extinguishers with a Class C rating are suitable for fires in “live” electrical equipment. Both monoammonium phosphate and sodium bicarbonate are commonly used to fight this type of fire because of their nonconductive properties.

“D” COMBUSTABLE METALS

Fire extinguishers with a Class C rating are suitable for fires in “live” electrical equipment. Both monoammonium phosphate and sodium bicarbonate are commonly used to fight this type of fire because of their nonconductive properties.