Chapter 7: Portable Fire Extinguishers Flashcards
Extinguisher Classification
A: GREEN TRIANGLE: ordiary combustibles
B: RED SQUARE: flammale/combust. liquids
C: BLUE CIRCLE: energized electrical equipment
D: YELLOW STAR: combustible metals
K: N/A N/A: commercial cooking
Class A ratings
1A-40A:
1A= 50 pieces of (5cm x 5cm x 50 cm)
5L of water = 1A
Class B rating
1B-160B
1B= .09sqm or 1 sqf of liquid at appreciable depth of 6mm.
Class C
no numerical rating
dry chem, CO2, Halon and other inert gases
Class D
no numerical rating
we use met-L-X @ 14kg
sodium chloride is main agent
Class K
Minimum of a 40B rating
wet chemical must: completely extinguish fire in fryer, prevent re-ignition for 20 min. and reduce temp 15.6’c below ignition point, cause no splashing
Saponification
A reaction that emulsifies oil to form a type of soap that floats on the surface of oil and prevents re-ignition of the oil vapors
Tanker
Pump
ATP
carry ….
Back Pack: A : 4A : 60-180s: 3-9m
Dry Chem: ABC: 20A60BC: 10-25s : 2-4.5m
CO2 : BC : 10BC : 10-30s : 1-2.5m
Rescue
Ladder
Quint
carry….
Dry Chem: ABC: 20A60BC: 10-25s : 2-4.5m
CO2 : BC : 10BC : 10-30s : 1-2.5m
Met-L-X : // : // : 10-25s: 2-4.5m
Met-L-X dry powder: 14kg of agent in extinguisher
Dry Chem is MONNEX: 14 kg of agent
REACT
Rescue Ensure door is closed Activate Alarm Call 911 Try to extinguish
PASS
Pull pin
Aim
Squeeze
Sweep
A hand held Fire Extinguisher
not to exceed 25kg
4 components of a Dry chem extinguisher
Pressure vessel
A Valve
Pressurizing Gas
Extinguishing Agent
100ml of 4oz of Class A foam concentrate
In our 20L back pack will give us 0.5%-0.6% foam solution
Occupancy Hazard Classifications
Light: Class A: minimal
Ordinary: box stores…Class A&B… COSTCO
Extra Hazard:Class A&B… Production or processing plants.. DOW
