Fire Extinguishers 29 CFR 1910.157. © Business & Legal Reports, Inc. 0809 Session Objectives You...

Fire Extinguishers

29 CFR 1910.157

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© Business & Legal Reports, Inc. 0809

Session ObjectivesYou 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

• Uninhibitedchain reaction


Class AOrdinary combustibles:• Wood• Paper• Plastic• Garbage


Class BFlammable liquids:• Grease• Gasoline• Oil• Solvents


Class CEnergized electrical equipment:• Appliances• Switches• Panel boxes• Power tools


Class DCombustible metals:•Magnesium• Titanium• Potassium and sodium• Pyrophoric materials


Class KKitchen 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 (CO2) Extinguishers• Class BC-rated• Not effective on

Class A fires• Should not be used on

Class D—metal 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 fire’s

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-36TM 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 feet—Class A• 50 feet—Class B• 50–75 feet—Class C• 75 feet—Class 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

Fire Extinguishers 29 CFR 1910.157. © Business & Legal Reports, Inc. 0809 Session Objectives You...

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