Foam powerpoint - efdtraining.org
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Transcript Foam powerpoint - efdtraining.org
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.