Fire Extinguisher Classes: Which one is right for your workplace?

Fire Extinguisher Classes: Which one is right for your workplace?

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Did You Know? Not all fire extinguishers are created equal. It is very important that you choose the right fire extinguishers for your job site. A classification system has been developed to identify which extinguishers should be used on specific type of fires. Use the guide below to understand which fire extinguisher you need to be prepared for the unexpected.


fire extinguisher class A

Class A

Description

Ordinary combustibles such as wood, cloth, paper, rubber and many plastics.

Type

Water (Air-Pressurized Water Extinguishers (APW))

Class icons

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fire extinguisher class B

Class B

Description

Flammable liquids such as gasoline, oil, grease, tar, oil-based paint, lacquer and flammable gas.

Type

Multipurpose (dry chemical extinguishers (AB)) CO2 or Dry Chemical (carbon dioxide extinguishers (BC))

Class icons

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fire extinguisher class C

Class C

Description

Energized electrical equipment including wiring, fuse boxes, circuit breakers, machinery and appliances.

Type

Multipurpose (dry chemical extinguishers)

Class icons

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fire extinguisher class D

Class D

Description

Fires involving powders, flakes or shavings of combustible metals such as magnesium, titanium, potassium and sodium.

Class icons

fire extinguisher class D

fire extinguisher class K

Class K

Description

Combustible cooking media such as oils and grease commonly found in commercial kitchens.

Class icons

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Understanding UL Fire Extinguisher Ratings:

Class A: The 'A' refers to the amount of water (in gallons) the extinguisher is equal to and represents 1.25 gallons of water for every unit of one.

Class B: The 'B' stands for the square footage the extinguisher can handle.

Class C: The 'C' indicates that the extinguisher can be used on electrical equipment.

Example: 3-A:40-B:C 3-A: equivalent to 3.75 gallons of water (3 x 1.25). 40-B: covers 40 square feet. C: can be used on electrical equipment.


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