DCC FIR 204 Fire Protection Systems

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DCC FIR 204Fire Protection Systems

• Chapter 2- Portable Fire Extinguishers

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BLOOD DRIVE

• Today, Tuesday, 9/5
• 130-630
• Arlington HQ, 11 Burnett Blvd.

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Name Date
Hazard class
100
25
20 20
10
50
17 16
30
10
25
33
34 33
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HOMEWORK EXAMPLE FORMAT
LOC TYPE CLASS RATING HYDRO
E1 PW A 2A 2003
E1 DRY CHEM ABC 2A10BC 2002
E1 CO2 BC 20BC 2004
E2 FOAMPW AB 2A10B 2005
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Why Must Firefighters be Knowledgeable in Fire
Extinguishers?????

• They use them
• They inspect them
• They may service them
• Pub Ed- they are viewed as the experts

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The purpose of a fire extinguisher

• is to enable a person with minimal training and
  orientation to extinguish an incipient fire

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General Rules of Fire Extinguishers for the Public

• Only attempt to extinguish a fire that can be
  controlled in 10-15 seconds.
• Always notify 911 BEFORE you use an
  extinguisher.
• Use the proper type extinguisher ABC is the best
  type to get
• Always have an escape route planned
• Never turn your back on a fire, even if you think
  its out.

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WHERE SHOULD THEY INSTALL THEM?

• Locate near exits, so after they grab it, they
  still have the option to bail out.
• In plain view
• High enough kids cant get the but low enough
  that those who would grab them can do so quickly.
• At least 1 per floor
• Check it at least monthly
• Ensure the entire family knows about them and
  when/when not to use them.

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• The first version of the modern fire extinguisher
  was invented in the United Kingdom by Captain
  George Manby in 1816, consisting of a copper
  vessel of 3 gallons (13.6 liters) of pearl ash
  (potassium carbonate)solution under compressed
  air pressure.

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SODA ACID EXTINGUISHER

• The late 19th century saw the invention of the
  Soda-Acid extinguisher
• A cylinder contained 1 or 2 gallons of water that
  had sodium bicarbonate mixed in it.
• Suspended in the cylinder was a phial containing
  concentrated sulphuric acid.
• Activating the extinguisher by striking a plunger
  to break the phial, or inverting the extinguisher
  to release a lead bung from the phial (depending
  on type), released the acid which mixed with the
  bicarbonate solution to generate carbon dioxide
  gas that expelled the water under pressure
  through a nozzle or short length of hose.

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DRY CHEMCIALS

• Effective due to their coating ability
• But this can be a detriment in some electronic
  equipment

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3 types of dry chemical extinguishers (overview)
REGULAR DRY CHEMCIAL AGENTS

• Sodium bicarbonate based
• Potassium based
• Multi purpose dry chemical

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SODIUM BICARBONATE BASED

• Similar to baking soda
• Class B C

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POTASSIUM BASED

• Class BC
• More effective than sodium bicarbonate based

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MULTI PURPOSE DRY CHEMICAL

• Class A,B,C
• Monoammonium phosphate

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Inexpensive kitchen fire extinguisher (B-C)

• Take old 1 lb coffee can
• Perforate edge of bottom with can opener.
• Place plastic top on bottom turn over
• Fill with baking soda
• Put another plastic top on can
• Label the can

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http//www.armhammer.com/basics/magic/9

• Download their can label

Thanks to Arm Hammer
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In event of fire

• Call 911
• If practical, use coffee can fire extinguisher
• Turn can over so bottom is now on top
• Remove plastic top, shake can over fire until
  extinguished.

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HALON

• Introduced in 70s
• Stops chemical chain reaction
• Originally thought to be totally safe
• Then discovered it turns into phosgene gas when
  heated to 750f
• Then discovered to harm the ozone layer
• Montreal protocol
• Signed 1987
• Fully effective 2000

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HALONTRONSAFE REPLACEMENT FOR HALON

• 11 lb Halotron I Fire Extinguisher1-A10-BC
  rating
• Halotron I is an ozone-friendly replacement for
  Halon 1211

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Carbon Tetrachloride Extinguishers
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REALITY CHECK

• Fire Extinguishers can explode when heated!!!!!!
• Fire Extinguishers can fail when not properly
  secured

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Reality Check

• Using the wrong extinguisher or using the right
  one the wrong way can be worse than not using
  one at all!!!!!

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FIRE EXTINGUISHERS

• Are part of a total system
• Prevention
• Incipient stage fire
• 911
• Fire Department Response
• Small fire
• Remote fire
• Overhaul
• FDNY-Truck Company

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EXTINGUISHERS INSPECTION

• Overall well being
• Is it full?
• Any damage
• Tank
• Hose
• Gage
• Within hydrostatic test date?
• Pin and tie in place
• Inspection sticker present and up to date
• Bracket- workable?
• Bottom Line Is it ready to be used?

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EXTINGUISHER PLACEMENT

• 1-5.1 Light (low) Hazard minor amount of Class A
  combustibles
• Offices
• Classrooms
• Hotel/motel rooms
• This classification anticipates that the majority
  of contents are either non combustible or
  arranged so that a fire is not likely to spread

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EXTINGUISHER PLACEMENT

• 1-5.2Ordinary (moderate) Hazard Total amounts of
  Class AB combustibles/flammables is present in
  greater amounts that a Light Hazard Area
• Dining areas
• Mercantile shops
• Allied storage
• Light manufacturing
• Auto showrooms

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EXTINGUISHER PLACEMENT

• 1-5.3 Extra (High) Hazard where total amounts of
  Class A B combustibles/flammables is greater
  than that of a Moderate Hazard.
• Woodworking shop
• Vehicle repair
• Aircraft and boat servicing
• Cooking areas
• Manufacturing processes such as painting

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EXTINGUISHER PLACEMENT

• The number of and placement is determined by
• Area of the occupancy
• Maximum travel distance to an extinguisher

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Why are they mounted near each other?
CO2 (BC)
PW Class A
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Two 20 lb ABCs
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RATINGS

• 1A- 1X1X1 wood crib (1.25 gallons of water)
• 1B1 square foot of pentane
• C has no ratings just indicates it can
  extinguish electrical fires.

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ratings

• The following ratings are capable of
  extinguishing what size fire?
• 2A10BC
• 4A20BC

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QUESTIONS???