FIRE EXTINGUISHERS Fairfax County Fire and Rescue Department

FIRE EXTINGUISHERS Fairfax County Fire and Rescue Department 1

REFERENCE S: • Delmar; Firefighter’s Handbook-Chapter 2 • IFSTA Essentials 5 th Edition – Chapter 6 • NFPA 10; Portable Fire Extinguishers 2

OBJECTIVE S: • Evaluate if a fire should be attempted to be put out with an extinguisher. • Calculate a fire extinguisher’s potential fire fighting capability. • Describe fire extinguisher classes and what type of fire it is designed to extinguish. • Operate a fire extinguisher properly. 3

How Is Fire Extinguished 1. 2. 3. 4. Remove fuel – burn house to the ground or remove logs from fireplace Remove Oxygen Remove heat Break Chain Reaction Fairfax County Fire and Rescue Department 4

Can this be put out with a fire extinguisher? Fairfax County Fire and Rescue Department 5

Example of fire in Free Burning Phase. 6 Fairfax County Fire and Rescue Department

Example of a fire in a later stage. 7 Fairfax County Fire and Rescue Department

What You Must Know Before Using a Portable Fire Extinguisher Location of the fire Extent Risk/benefit Which fire extinguisher Location of exit Fairfax County Fire and Rescue Department 8

Not An Extinguisher Fire Too Big Too wide an area Location of exit or unknown exit Fairfax County Fire and Rescue Department 9

Fairfax Countyout Fire and Rescue Department Can this put with an extinguisher? 10

Fire Extinguisher Inspections Check for Location Check for Inspection Date Check for Hydrostatic Date Check Nozzle for Obstructions Check for Damage Check for Presence of Pin/Seal Check Gauge Check Condition of Hose Fairfax County Fire and Rescue Department 11

Obsolete Extinguishers Soda acid. Chemical foam (except film-forming. ) Vaporizing liquids. Cartridge-operated water or loaded stream. Copper or brass extinguishers. Never Operate Obsolete Extinguishers. 12 Fairfax County Fire and Rescue Department

Additional Obsolete Extinguishers Pressurized water extinguishers manufactured prior to 1971 Stored pressure extinguishers manufactured prior to 1955 (Including common CO 2 extinguishers). Class B extinguishers with a 4 B, 6 B, 8 B, 12 B or 16 B rating. Extinguishers that must be inverted to operate. Stored pressure water extinguishers with fiberglass shell manufactured prior to 1976. Stored pressure dry chemical extinguishers (common multipurpose ABC extinguishers) manufactured prior to October 1984. Fire extinguishers that can not be serviced in accordance with the manufacturer’s maintenance manual. Fairfax County Fire and Rescue Department 13

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Class A Extinguisher Ratings Extinguisher Rating of 1 A – 40 A A rating of 1 A has the same fire fighting capability as 1. 25 gallons of water Fairfax County Fire and Rescue Department 15

Math Quiz How many gallons would a 20 A rated extinguisher be equivalent? Fairfax County Fire and Rescue Department 16

Class B Extinguisher Ratings Extinguisher Rating of 1 - 640 A rating of 1 B has the fire fighting capability for a non-expert to extinguish 1 square foot of flammable liquids The rating assumes that a non-expert has 40% capability of an expert Fairfax County Fire and Rescue Department 17

Math Quiz How big of a class B fire should a non expert be able to extinguish with an extinguisher rated at 20 B? What about an expert? Fairfax County Fire and Rescue Department 18

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ORDINARY COMBUSTIBLESClass A A Fairfax County Fire and Rescue Department Numerical Rating Based on Effectiveness 20

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FLAMMABLE LIQUIDS-Class B B Fairfax County Fire and Rescue Department Numerical Rating Based on Effectiveness 22

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ELECTRICAL EQUIPMENT-Class C C Fairfax County Fire and Rescue Department No Numerical Rating-only a Certification 27

COMBUSTIBLE METALS-Class D Fairfax County Fire and Rescue Department No Numerical Rating-only a Certification 28

KITCHEN MEDIA- Class K K * Artist’s Rendition Fairfax County Fire and Rescue Department No Numerical Rating-only a Certification 29

Kitchen Wet-Chemical Size 6 Liter or 21/2 Gallon Application Class A Limited on Class B Class C and Class K Operating Principle Fairfax County Fire and Rescue Department. Stored Pressure 30

Effects of using wrong agent 31 Fairfax County Fire and Rescue Department

CLASS THAT FIRE Acetone Wood Cooking oil Propane Magnesium Car Couch TV Trash can 32

P Pull A Aim S Squeeze S Sweep Fairfax County Fire and Rescue Department 33

Demonstration/Practice We will demo the skilled use of three types of fire extinguishers Water can CO 2 Dry Chemical Each of you will get to practice the use of three different types of extinguishers Fairfax County Fire and Rescue Department 34

OBJECTIVE S: • Evaluate if a fire should be attempted to be put out with an extinguisher. • Calculate a fire extinguisher’s potential fire fighting capability. • Describe fire extinguisher classes and what type of fire it is designed to extinguish. • Operate a fire extinguisher properly. 35

ANY Take. QUESTIONS a 10 Minute Break and Report To The High Bay 36