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Firefighting Foam

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  1. Firefighting Foam

  2. 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

  3. 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

  4. How Firefighting Foam works! SEPARATES CREATES A BARRIER BETWEEN THE FUEL AND THE FIRE

  5. COOLS LOWERS THE TEMPERATURE OF THE FUEL AND ADJACENT SURFACES

  6. SMOTHERS SUPPRESSES THE RELEASE OF FLAMMABLE VAPORS

  7. PENETRATES LOWERS THE SURFACE TENSION OF WATER AND ALLOWS IT TO PENETRATE DEEP-SEATED FIRES

  8. CLASS B FIRESTWO BASIC CATEGORIES HYDROCARBON FUELS • CRUDE OIL • FUEL OIL • GASOLINE • BENZINE • NAPHTHA • JET FUEL • KEROSENE

  9. POLAR SOLVENTS • ALCOHOLS • ACETONE • LAQUER THINNER • KETONES • ESTERS • ACIDS • HYDROPHILIC (MIX WITH WATER)

  10. FOAM TERMINOLOGY • FOAM CONCENTRATE • FOAM PROPORTIONER • FOAM SOLUTION • FOAM

  11. FOAM CONCENTRATE • MUST MATCH FUEL TO WHICH THEY ARE APPLIED • CLASS A-WILDLAND/STRUCTURAL • CLASS B-FLAMMABLE/COMBUSTIBLE LIQUIDS

  12. AFFF • APPLIED USING STANDARD FOG NOZZLE • AIR ASPIRATING FOAM NOZZLE MAXIMUM EXPANSION • MATCH PROPORTIONER WITH PERCENTAGE NUMBER ON CONTAINER

  13. FOAM PROPORTIONING • INDUCTION • INJECTION • BATCH MIXING • PREMIXING

  14. OPERATION E2805 • SELECT FOAM % • OPEN WATER VALVE • CLOSE BYPASS VALVE • OPEN FOAM VALVE • SET PUMP DISCHARGE PRESSURE TO 200 PSI • FRONT CROSSLAY

  15. OPERATION E2808 • SELECT FOAM % • OPEN WATER VALVE • OPEN EDUCTOR VALVE • OPEN FOAM VALVE • SET PUMP DISCHARGE PRESSURE TO 200 PSI • #1 CROSSLAY

  16. OPERATION E2812 • SELECT FOAM % • PULL WATER HANDLE • PULL EDUCTOR HANDLE • PULL FOAM HANDLE • SET PUMP TO 200 PSI

  17. FLUSH!FLUSH!FLUSH! • REDUCE PRESSURE TO 100 PSI • PULL FLUSH HANDLE • ROTATE FOAM SELECTOR • FLUSH FOR 3 MINUTES

  18. IN-LINE EDUCTOR OPERATION

  19. VENTURI PRINCIPLE AS WATER AT HIGH PRESSURE PASSES THROUGH A RESTRICTED OPENING, IT CREATES A LOW-PRESSURE 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.

  20. VENTURI PRINCIPLE CONT. A PICKUP TUBE SUBMERGED IN THE FOAM CONCENTRATE DRAWS CONCENTRATE INTO THE WATER STREAM, CREATING A FOAM WATER SOLUTION.

  21. 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!!!!

  22. IN LINE EDUCTORSLOCATION • E2805 PUMP OP COMPARTMENT • E2812 PUMP OP COMPARTMENT

  23. FOAM APPLICATION TECHNIQUES • ROLL-ON • BANK-DOWN • RAIN-DOWN

  24. DO NOT PLUNGE!!!!!

  25. ROLL ON

  26. BANK DOWN

  27. RAIN DOWN

  28. HEALTH RISKS • MILD IRRITANT (SKIN/EYES) • VAPORS MAY BE HARMFUL IF INGESTED OR INHALED

  29. ENVIRONMENTAL IMPACT • IN A WATERWAY, THE REDUCTION IN OXYGEN CAN CAUSE DAMAGE BY KILLING FISH AN OTHER AQUATIC CREATURES

  30. SAFETY!!!!!!! • PPE • SCBA • DON’T TURN YOUR BACK • SHUFFLE YOUR FEET • RE-APPLY OFTEN • SAFETY OFFICER • BACKUP LINES • WIND DIRECTION

  31. MAINTENANCE • FLUSH ALL DEVICES AND HANDLINES WITH FRESH WATER FOR A MINIMUM OF THREE MINUTES!!!!! • RE-SUPPLY FOAM TANKS ASAP.