fire extinguishers 29 cfr 1910.157. © business & legal reports, inc. 0809 session objectives...
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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
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Fire Tetrahedron• Oxygen
• Fuel
• Heat
• Uninhibitedchain reaction
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Class AOrdinary combustibles:• Wood• Paper• Plastic• Garbage
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Class BFlammable liquids:• Grease• Gasoline• Oil• Solvents
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Class CEnergized electrical equipment:• Appliances• Switches• Panel boxes• Power tools
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Class DCombustible metals:•Magnesium• Titanium• Potassium and sodium• Pyrophoric materials
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Class KKitchen fires:• Added in 1998• Grandfathered if
installed before 1998
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Classes of Fires—Any Questions?• Any questions about
the fire triangle or the different classes of fires?
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Extinguishing the Fire• Remove heat• Remove oxygen• Remove the fuel
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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
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Dry Chemical Extinguishers• Best all-around choice• Help prevent
reignition• Make a mess• Class BC contains
sodium bicarbonate• Class ABC contains
ammonium phosphate
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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
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Metal/Sand Extinguishers• Class D-rated• Powdered copper• Sodium chloride• Form an airtight crust over the fire
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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
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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
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FE-36TM Extinguishers• Halon 1211 replacement• Less toxic • No ozone depletion• Class BC-rated
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Water Mist Extinguishers• Class AC-rated • Safety from
electrical shock• Less scattering of
burning materials• Hospital environments
and clean rooms
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Types of Extinguishers— Any Questions?• Any questions about
the different types of fire extinguishers?
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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
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PASS• Pull• Aim• Squeeze• Sweep
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Inspect Extinguishers• Monthly inspection• Extinguisher not
blocked• Pressure is acceptable• Pin and seal are intact• No dents or damage
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Care and Maintenance• Keep extinguisher clean• Replace if damaged• Recharge immediately after use• Have hydrostatic testing done• Remove nonrechargeables after 12 years
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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
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Types of Extinguishers— Any Questions?• Any questions about
using, inspecting, and maintaining fire extinguishers?
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Key Points to Remember• Fire tetrahedron• Fire hazard class• Know your extinguishers• Fight or flight• PASS