Firefighting
Foam
WHY USE FOAM????
MANY AGENTS CAN EXTINGUISH A
CLASS “B” FIRE, HOWEVER, FOAM
PROVIDES:
SUPPRESSION OF FLAMMABLE
VAPORS
PREVENTION OF FUEL IGNITION, OR
RE-IGNITION
POST FIRE SECURITY
TYPES OF INCIDENTS THAT
MAY REQUIRE FOAM
FUEL SPILLS (VEHICLE/AIRCRAFT)
CHEMICAL SPILLS PAINT, MOTOR OIL,
LAQUER THINNER, AND OTHER
FLAMMABLE LIQUIDS FOUND IN
RETAIL STORES
How Firefighting Foam works!
SEPARATES
CREATES A BARRIER BETWEEN THE
FUEL AND THE FIRE
COOLS
LOWERS THE TEMPERATURE OF THE
FUEL AND ADJACENT SURFACES
SMOTHERS
SUPPRESSES THE RELEASE OF
FLAMMABLE VAPORS
PENETRATES
LOWERS THE SURFACE TENSION OF
WATER AND ALLOWS IT TO
PENETRATE DEEP-SEATED FIRES
CLASS B FIRES
TWO BASIC CATEGORIES
HYDROCARBON FUELS
CRUDE OIL
FUEL OIL
GASOLINE
BENZINE
NAPHTHA
JET FUEL
KEROSENE
POLAR SOLVENTS
ALCOHOLS
ACETONE
LAQUER THINNER
KETONES
ESTERS
ACIDS
HYDROPHILIC (MIX WITH WATER)
FOAM TERMINOLOGY
FOAM CONCENTRATE
FOAM PROPORTIONER
FOAM SOLUTION
FOAM
FOAM CONCENTRATE
MUST MATCH FUEL TO WHICH THEY
ARE APPLIED
CLASS A-WILDLAND/STRUCTURAL
CLASS B-FLAMMABLE/COMBUSTIBLE
LIQUIDS
AFFF
APPLIED USING STANDARD FOG
NOZZLE
AIR ASPIRATING FOAM NOZZLE
MAXIMUM EXPANSION
MATCH PROPORTIONER WITH
PERCENTAGE NUMBER ON
CONTAINER
FOAM PROPORTIONING
INDUCTION
INJECTION
BATCH MIXING
PREMIXING
OPERATION E2805
SELECT FOAM %
OPEN WATER VALVE
CLOSE BYPASS VALVE
OPEN FOAM VALVE
SET PUMP DISCHARGE PRESSURE TO
200 PSI
FRONT CROSSLAY
OPERATION E2808
SELECT FOAM %
OPEN WATER VALVE
OPEN EDUCTOR VALVE
OPEN FOAM VALVE
SET PUMP DISCHARGE PRESSURE TO
200 PSI
#1 CROSSLAY
OPERATION E2812
SELECT FOAM %
PULL WATER HANDLE
PULL EDUCTOR HANDLE
PULL FOAM HANDLE
SET PUMP TO 200 PSI
FLUSH!FLUSH!FLUSH!
REDUCE PRESSURE TO 100 PSI
PULL FLUSH HANDLE
ROTATE FOAM SELECTOR
FLUSH FOR 3 MINUTES
IN-LINE EDUCTOR
OPERATION
VENTURI PRINCIPLE
AS WATER AT HIGH PRESSURE
PASSES THROUGH A RESTRICTED
OPENING, IT CREATES A LOWPRESSURE AREA ON THE OUTLET
SIDE OF THE EDUCTOR.THIS LOW
PRESSURE AREA CREATES SUCTION
BECOUSE OF THE VENTURI
EFFECT.THE EDUCTOR PICKUP TUBE
IS CONNECTED TO THE EDUCTOR AT
THIS LOW PRESSURE POINT.
VENTURI PRINCIPLE CONT.
A PICKUP TUBE SUBMERGED IN THE
FOAM CONCENTRATE DRAWS
CONCENTRATE INTO THE WATER
STREAM, CREATING A FOAM WATER
SOLUTION.
IN LINE EDUCTOR
OPERATION
1 3/4” HANDLINE MUST NOT EXCEED
150’ FROM THE EDUCTOR.
APPLIES TO ANY SETTING ON EDUCTOR.
NO KINKS IN HANDLINE.
NOZZLE BALE OPEN FULLY.
DO NOT INSERT PICKUP TUBE INTO FOAM
CONCENTRATE UNTIL YOU ACHIEVE 200
PSI.
FLUSH EDUCTOR WITH FRESH WATER!!!!
IN LINE EDUCTORS
LOCATION
E2805 PUMP OP COMPARTMENT
E2812 PUMP OP COMPARTMENT
FOAM APPLICATION
TECHNIQUES
ROLL-ON
BANK-DOWN
RAIN-DOWN
DO NOT PLUNGE!!!!!
ROLL ON
BANK DOWN
RAIN DOWN
HEALTH RISKS
MILD IRRITANT (SKIN/EYES)
VAPORS MAY BE HARMFUL IF
INGESTED OR INHALED
ENVIRONMENTAL IMPACT
IN A WATERWAY, THE REDUCTION IN
OXYGEN CAN CAUSE DAMAGE BY
KILLING FISH AN OTHER AQUATIC
CREATURES
SAFETY!!!!!!!
PPE
SCBA
DON’T TURN YOUR BACK
SHUFFLE YOUR FEET
RE-APPLY OFTEN
SAFETY OFFICER
BACKUP LINES
WIND DIRECTION
MAINTENANCE
FLUSH ALL DEVICES AND HANDLINES
WITH FRESH WATER FOR A MINIMUM
OF THREE MINUTES!!!!!
RE-SUPPLY FOAM TANKS ASAP.