Presentation on theme: "Foam. HomeFoam n Solution of air, water, foam concentrate, and mechanical agitation used to form a floating blanket on flammable and combustible liquids."— Presentation transcript:
HomeFoam n Solution of air, water, foam concentrate, and mechanical agitation used to form a floating blanket on flammable and combustible liquids. It prevents or extinguishes a fire by excluding air and cooling fuel. Foam also aids in preventing reignition by suppressing flammable vapors.
HomeTerminology n Foam concentrate - from factory n Foam solution - water + concentrate n Finished foam solution - water + concentrate + mechanical agitation
Home Foam Tetrahedron n Concentrate n Water n Air n Aeration (mechanical agitation)
Home Types of Foam n Protein n Fluoroprotein n Film Forming Fluoroprotein Foam (FFFP) n Aqeous Film Forming Foam (AFFF) n Alcohol Resistant AFFF (AR-AFFF)
HomeProtein n Originated in WWII n Derived from natural sources n 3% or 6% n Excellent water retention n High heat resistance n 35 to 120 degrees F n Hydrocarbons only n 10 year shelf life
HomeFluoroprotein n Fluorochemical surfactants added to reg. Protein foam n Can be used for Subsurface Injection n Not affected by thawing or freezing n 3%-6% n n 10 year shelf life
Home Film Forming Fluoroprotein Foam (FFFP) n 3%-6% n degrees F n Can be stored premixed in apparatus n Not affected by thawing or freezing n Can be used with fresh or salt water
Home Aqueous Film Forming Foam (AFFF) n Most used n All synthetic n 1% - 3% - 6% n Can be used with salt or fresh water n Can be premixed in apparatus water tanks n degrees F n Good low temperature viscosity
Home Aqueous Film Forming Foam (AFFF) cont. n Suitable for subsurface injection n Can be used as Class A foam if needed n Effective only on hydrocarbons
Home Alcohol Resistant AFFF n Same charcteristics as AFFF but can also be used on polar solvents!
Home Expansion Ratios n Low Expansion – up to 20:1 (we use 10:1) n Medium Expansion – :1 (Haz-Mat vapor mitigation) n High Expansion – :1 (Confined Space)
Home Types of Fuels n Hydrocarbons n Polar Solvents
HomeHydrocarbons n Products of crude oil n Do not mix with water n Gasoline, Diesel, JP8, Kerosene, Asphalt, Motor oils, Vegetable oil, and Animal Fat
Home Polar Solvents n Products of distillation n Easily mix with water n Ketones, Esters, Alcohol, Amine, MTBE
Home Foam Equipment n Eductors HLP-9 (in-line) PC-30A n Foam nozzles JS-10 PC-31 PC-50 PC-100 Task Force Tip Foam Adapter
HomeHLP-9 n In-line eductor n Works off of venturi effect n Large amount of friction loss n No more than 6 feet between eductor and concentrate surface n Pump at 200 psi
HomeHLP-9 n No more than 200 feet between eductor and nozzle
HomePC-30A n Utilized for Sub- Surface Injection
HomeJS-10 n 1-1/2 nozzle n 100 gpm at 100 psi
HomePC-31 n 2-1/2 nozzle n 310 gpm at 100 psi
HomePC-50 n This nozzle under ideal conditions is capable of delivering 500 gallons of finished foam solution per minute n It has a reach of 170 feet at 150 PSI
HomePC-100 n Capable of delivering 1000 gallons per minute of finished foam solution under ideal conditions n Has a reach of 190 feet at 150 PSI
Home Task Force Tip - Foam Adapter n Purpose is to provide additional foam as a master stream n Can be used on ground monitors or elevated master streams (ladder trucks)
Home Establish an Excellent Water Supply!
Size up n How large is the spill\fire? n What resources are needed?
Home Approach Scene n If possible approach from upwind
Home Application Techniques n Bounce off n Bank in n Rain down
Homeblanket n Minimum 4 blanket n If you must walk through blanket do not pick feet up!
Chesapeakes First Foam Unit n Property of Shell n Utilized a dry powder hopper which worked off of a venturi effect n Carried A & B foam
Home Foam 35 n Donated by the Department of Civil Defense. n It carried an extinguishing agent called Purple K which is located in the center dome shaped container. n It also carried the A & B type foam powder.
Home Engine 6 n Chesapeake Fire Departments third foam unit n Manufactured in house by CFD Personnel
Home Foam 12 n Foam Pem-Fab / National Foam n Designed with a balanced pressure system n 1000 GPM pump n 275 gal. Water tank n 128 GPM Foam pump with 550 gallons of Universal Gold n Currently assigned in the Western Branch area
Home Engine 1 n 1993 Pierce / National Foam Unit n Has a balanced pressure system n 2000 GPM water pump with 500 gallons water n 250 GPM foam pump with 500 gallons Universal Gold
Home Foam 1 n 1973 Chevrolet n Carries 1400 gallons of XL-3 type foam n Also carries a limited supply of foam appliances
Home Chesapeakes Foam n Universal Gold 3% AR-AFFF n XL-3 Fluoroprotein
Home Engine Company n 15 gal. Universal Gold 3% n HLP9 in-line eductor n JS-10 foam nozzle