1. 29 CFR 1910.157

2. 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

3. Fire Triangle
 Oxygen
 Fuel
 Ignition

4. Class A
 Ordinary combustibles
 Wood
 Paper
 Plastic
 Garbage

5. Class B
 Flammable liquids
 Grease
 Gasoline
 Oil
 Solvents

6. Class C
 Energized electrical
equipment
 Appliances
 Switches
 Panel boxes
 Power tools

7. Class D
 Combustible metals
 Magnesium
 Titanium
 Potassium and sodium
 Pyrophoric materials

8. Classes of Fires—Any
Questions?
 Any questions about
the fire triangle or the
different classes of
fires?

9. Extinguishing the Fire
 Remove heat
 Remove oxygen
 Remove the fuel

10. 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

11. Dry Chemical Extinguishers
 Best all-around
choice
 Help prevent
re-ignition
 Make a mess
 Class ABC contains
ammonium
phosphate

12. Carbon Dioxide (CO2)
Extinguishers
 Class BC-rated
 Most Contain Carbon
Dioxide
 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

13. Metal Extinguishers
 Class D rated
 Powdered copper
 Sodium chloride
 Form an airtight crust over the fire

14. Types of Extinguishers— Any
Questions?
 Any questions about
the different types of
fire extinguishers?

15. Fight-or-Flight Decision
 Alarm has been pulled
 Fire dept. 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

16. PASS
 Pull
 Aim
 Squeeze
 Sweep

17. Inspect Extinguishers
 Monthly inspection
 Extinguisher not
blocked
 Pressure is acceptable
 Pin and seal are
intact
 No dents or damage
 Performed by EH&S

18. Care and Maintenance
 Keep extinguisher clean
 Replace if damaged
 Recharge immediately after use
 Have hydrostatic testing done
 Remove non-rechargeables after 12 years

19. Locations and Signs
 Readily accessible
 Highly visible sign.

20. Types of Extinguishers— Any
Questions?
 Any questions about
using, inspecting,
and maintaining fire
extinguishers?

21. Key Points to Remember
 Fire triangle
 Fire hazard class
 Know your extinguishers
 Fight or flight
 PASS

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