Class D Dry Powder Fire Extinguisher

Class D fire extinguishers are specifically designed to support smothering and extinguishing fires involving combustible metals or metallic alloys with combustible metal components such as magnesium, aluminum, titanium, zirconium, sodium uranium, calcium, plutonium, potassium, lithium and zinc.

Class D hazards are hazardous and can cause significant damage. They burn hot, spread very quickly, and are not easy to put out, making them dreadfully destructive. These types of fires frequently happen in industrial, manufacturing, or laboratory locations like chemical plants, machine shops, and welding plants, when the metal fines such as shavings or metal dust generated from the machines are exposed to heat which causes them to ignite, become the fuel element in the fire triangle (fuel, oxygen, heat).

What Type of Extinguishers are Rated Class D?

A dry powder extinguisher is the only kind of fire extinguisher to fight a Class D fire safely. The dry powder agent may be powdered graphite and granulated sodium chloride (salt) to effectively separate the ignited metal and cut off its oxygen supply. The dry agent also aids in the absorption of heat from the burning metal.

This type of extinguisher is only suited for Class D fires and does not affect any other class of fire. Please note that the term “dry powder” should not be mistaken with the term “dry chemical,” which is suited for flammable liquid fires.

Most Class D fires react significantly with water, CO2, and any other extinguishing agent may have an adverse effect since they react with the burning metal causing the severe growth of the fire, scattering of molten metal or even explosions. They emit toxic fumes and may intensify the fire. Thus, caution should be observed when fighting fires involving high-temperature metals and toxic vapours.

How to Use a Class D Fire Extinguisher?

It is crucial to safely operate this type of fire extinguisher as Class D fires can be highly hazardous. In confined spaces, proper care should be taken as the dry powder may affect breathing and irritate the eyes and skin.

  • Pull the safety pin and point the nozzle away from you
  • Always hold the extinguisher vertically and aim the nozzle over the flames while maintaining a safe distance
  • Squeeze the lever to discharge the dry powder
  • Slowly sweep to cover the burning metal completely
  • Establish a control to produce a soft but heavy flow while making sure not to break the crust formed by the powder

How it Works

The heat of the flames causes the dry powder agent to lump and form a crust that slowly absorbs and dissipates the heat from the burning metal. The crust also serves as a barrier, separating the burning metal (fuel) from its oxygen supply; thus, breaking the chemical reaction between the fire triangle’s elements.

Other Fire Safety Products We Offer

Fire extinguishers, fire alarm bell, fire signages

  • Fire Extinguishers

    Fire extinguishers are the most common equipment used for fire protection and are usually the first line of defence against a fire.

    We carry an array of extinguishers such as ABC Dry Chemical and Class D fire extinguishers that are suitable for use on different classes of fire.

  • Fire-Rated Doors

    Fire-rated doors are specially made to slow or prevent the spread of fire and smoke. These doors are created using durable materials like gypsum, glass, and steel.

  • Fire Hose

    Single jacket, double jacket and forestry fire hoses that are tough and durable.

  • Fire Hydrants

    Fire hydrants play a vital role in the firefighting process. They give firefighters access to a steady supply of water when putting out a fire.

  • Fire Suppression Systems

    Fire suppression systems are used to extinguish or stop the spread of fire through the use of dry chemicals and wet agents.

Why Choose Fire Safety PH?

High-Quality Products

Here at Fire Safety, we carry a range of high-quality, effective fire safety equipment that are designed to offer you maximum protection against fires. 

Commitment to Your Safety

We are dedicated to helping you understand the importance of fire safety. This helps you prevent and reduce the chances of a fire.