Frequent question: What do numbers on fire extinguishers mean?

The number indicates the relative size of the extinguisher, and the letter indicates the type of fire it will extinguish. … On Type A extinguishers, the number relates to how many gallons of water the extinguisher is equal to for a Type A fire. Type B fires are of flammable liquids such as gasoline or oil.

How do you read a fire extinguisher number?

Each whole number increase in the rating increases the panel dimensions by 2 feet. The number before the B indicates the area of the liquid spill, which is burning, that the extinguisher can extinguish. A 1B rating would extinguish a 2.5 square foot liquid fire and a 2B would extinguish a 5 square foot liquid fire.

What does ABC stand for in fire extinguishers?

Dry Chemical Extinguishers come in a variety of types. You may see them labeled: • “DC” short for “dry chem” • “ABC” indicating that they are designed to extinguish class A,B,and C fires, or • “BC” indicating that they are designed to extinguish class B and C fires.

What is the difference between 5BC and 10BC fire extinguisher?

In our tests, the 10BC units discharged only a fraction of a second longer than the 5BC, hardly “twice” anything. The 10BC, on average, discharged only 25% more fire suppressant than the 5BC.

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What is a Type D fire?

Class D fires only involving combustible metals – magnesium, sodium (spills and in depth), potassium, sodium-potassium alloys uranium, and powdered aluminum.

What are the 5 classes of fire extinguishers?

What are the 5 Types of Fire Extinguishers?

  • Class A Fire Extinguishers. Class A fire extinguishers are safe for use on ordinary combustible fires, like those fueled by paper or wood. …
  • Class B Fire Extinguishers. …
  • Class C Fire Extinguishers. …
  • Class D Fire Extinguishers. …
  • Class K Fire Extinguishers.

What does 2A 10bc mean?

A fire extinguisher that is rated 2A:10 BC means it has a fire fighting capacity equivalent to: 2.5 Gallons of Water and 10 Square Feet for a BC Type Fire.

What are the 4 types of fire extinguishers?

There are four classes of fire extinguishers – A, B, C and D – and each class can put out a different type of fire. Multipurpose extinguishers can be used on different types of fires and will be labeled with more than one class, like A-B, B-C or A-B-C.

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