Fire Extinguishers 29 CFR
Session Objectives You will be able to: Identify different classes of fire Choose the appropriate type of extinguisher Use a fire extinguisher Inspect and maintain extinguishers
Fire Tetrahedron Oxygen Fuel Heat Uninhibited chain reaction
Class A Ordinary combustibles: Wood Paper Plastic Garbage
Class B Flammable liquids: Grease Gasoline Oil Solvents
Class C Energized electrical equipment: Appliances Switches Panel boxes Power tools
Class D Combustible metals: Magnesium Titanium Potassium and sodium Pyrophoric materials
Class K Kitchen fires: Added in 1998 Grandfathered if installed before 1998
Classes of Fires Any Questions? Any questions about the fire triangle or the different classes of fires?
Extinguishing the Fire Remove heat Remove oxygen Remove the fuel
Water Extinguishers Rated only for Class A fires Spread a grease fire Cause an electrical shock on a Class C fire Increase a metal fire
Dry Chemical Extinguishers Best all-around choice Help prevent reignition Make a mess Class BC contains sodium bicarbonate Class ABC contains ammonium phosphate
Carbon Dioxide (CO 2 ) Extinguishers Class BC-rated Not effective on Class A fires Should not be used on Class Dmetal fires Do not leave a residue Are a good choice for computers or electronics Must be used 3 to 8 feet from the fire
Metal/Sand Extinguishers Class D-rated Powdered copper Sodium chloride Form an airtight crust over the fire
Halon Extinguishers Gas interrupts fires chemical reaction Are Class BC-rated Protect valuable electrical equipment Have a range of only 4 to 6 feet Halon production is now banned
Halotron I Extinguishers Replace Halon 1211 Discharge as a liquid Leave no residue Are nonconducting Are ideal for computers and electronics Are Class BC-rated
FE-36 TM Extinguishers Halon 1211 replacement Less toxic No ozone depletion Class BC-rated
Water Mist Extinguishers Class AC-rated Safety from electrical shock Less scattering of burning materials Hospital environments and clean rooms
Types of Extinguishers Any Questions? Any questions about the different types of fire extinguishers?
Fight-or-Flight Decision Alarm has been pulled Fire department has been called Fire is small and contained You can avoid the smoke Exit is clear Extinguisher is nearby You have been trained to use the extinguisher
PASS Pull Aim Squeeze Sweep
Inspect Extinguishers Monthly inspection Extinguisher not blocked Pressure is acceptable Pin and seal are intact No dents or damage
Care and Maintenance Keep extinguisher clean Replace if damaged Recharge immediately after use Have hydrostatic testing done Remove nonrechargeables after 12 years
Locations and Signs Readily accessible 75 feetClass A 50 feetClass B 50–75 feetClass C 75 feetClass D Highly visible sign
Types of Extinguishers Any Questions? Any questions about using, inspecting, and maintaining fire extinguishers?
Key Points to Remember Fire tetrahedron Fire hazard class Know your extinguishers Fight or flight PASS