Presentation on theme: "Gordon Cooper Technology Center D Fire Prevention & Protection."— Presentation transcript:
Gordon Cooper Technology Center D Fire Prevention & Protection
Objectives Understand the combustion process and different fire classes. Understand the combustion process and different fire classes. Understand fire extinguisher types, operating procedures, capabilities, and limitations. Understand fire extinguisher types, operating procedures, capabilities, and limitations. Understand basic firefighting concepts: Understand basic firefighting concepts: – R.A.C.E. – P.A.S.S.
Oxygen Fuel Heat/Ignition source (FIRE) They come together to create a chain reaction (FIRE) Elements of a Fire
THE FIRE TETRAHEDRON FUEL TEMPERATURE OXYGEN CHAIN REACTION
How to prevent Fires If we can keep these elements apart… We can prevent the fire from happening!
How Can we put out a fire? BREAK THE CHAIN! BREAK THE CHAIN! Eliminate any one of the elements, we can element the fire. That’s what extinguishes are made for. Incipient / beginning stages of fire only!
Fire Classes A Trash Wood Paper C Electrical Equipment B Liquids Grease COMBUSTIBLE METALS D wood cloth paper rubber many plastics gasoline oil grease tar oil-based paint lacquer flammable gases energized electrical equipment magnesium sodium potassium titanium zirconium other flammable metals
K Cooking Media Recently recognized by NFPA 10. Fires involving combustible vegetable or animal non- saturated cooking fats in commercial cooking equipment. CLASS K FIRES
Fire Extinguisher Anatomy DISCHARGE HOSE DISCHARGE NOZZLE DISCHARGE ORIFICE BODY DATA PLATE CARRYING HANDLE PRESSURE GAUGE (not found on CO 2 extinguishers) DISCHARGE LEVER DISCHARGE LOCKING PIN AND SEAL
Class “A” fires only. 2.5 gal. water at psi (up to 1 minute discharge time). Has pressure gauge to allow visual capacity check ft. maximum effective range. Can be started and stopped as necessary. cooling Extinguishes by cooling burning material below the ignition point. PRESSURIZED WATER
Class “B” or “C” fires lb. of CO 2 gas at psi (8-30 seconds discharge time). NO Has NO pressure gauge--capacity verified by weight. 3-8 ft. maximum effective range. smothering Extinguishes by smothering burning materials. decreases Effectiveness decreases as temperature of burning material increases. CARBON DIOXIDE (CO 2 )
Class “A”, “B”, or “C” fires lb. dry chemical (ammonium phosphate) pressurized to psi by nitrogen gas (8-25 seconds discharge time). Has pressure gauge to allow visual capacity check ft. maximum effective range. smothering Extinguishes by smothering burning materials. MULTIPURPOSE DRY CHEMICAL
Class “A”, “B”, or “C” fires (smaller sizes ineffective against Class “A”) lb. Halon 1211 (pressurized liquid) released as vapor (8-18 seconds discharge time). Has pressure gauge to allow visual capacity check ft. maximum effective range. Works best in confined area--ideal for electronics fire due to lack of residue. smothering Extinguishes by smothering burning materials. Fumes toxic if inhaled. Halon is ozone depleting chemical-- production halted in Jan ‘94. HALON
Class “D” combustible metal fires only. 30 lb. pressurized dry powder optimized for specific combustible metal (also available in bulk containers for hand scooping onto fire to extinguish). 6-8 ft. maximum effective range. smothering Extinguishes by smothering burning materials. COMBUSTIBLE METAL D COMBUSTIBLE METALS
Class “A”, “C”, and “K” fires. 1.5 gal. of stored pressure PRX wet chemical extinguishing agent (40 sec. discharge time) ft. maximum effective range. after On Class “K” fires, don’t use until after fixed extinguishing system has activated. cooling Extinguishes by cooling and forming foam blanket to prevent reignition. WET CHEMICAL CElectrical Equipment C K Cooking Media
Fire Extinguisher Summary EXTINGUISHER TYPE WORKS BY EFFECTIVE AGAINST PRESSURIZED WATER CARBON DIOXIDE MULTIPURPOSE DRY CHEMICAL HALON COMBUSTIBLE METAL COOLING SMOTHERING D WET CHEMICAL COOLING/ SMOTHERING
Fire Extinguisher Placement Class A Extinguishers – Placed within 75 feet of employees Class B Extinguishers – Placed within 50 feet of employees Class C Extinguishers – Placed based on pattern for existing class A & B hazards No matter where you’re at in the facility, the distance between you and an extinguisher should be no more 50 feet feet
Fire Extinguisher Maintenance 30 Day Visual Inspection Location, Accessibility, Pressure Labeled √ In Place √ Accessibility √ Green Is Good √
Fire Extinguisher Maintenance Annual Inspection – Conducted by External Company – Complete Inspection
Documenting Fire Extinguisher Maintenance 30 Day Visual Inspection – Noted on the extinguisher’s service tag Date & initials of Inspector Annual Inspection – Documentation provided by company – Retained a minimum of 1 year or life of extinguisher, whichever is less
Fire Emergency Response R Rescue Alarm Contain Extinguish A C E
Firefighting Decision Criteria Know Know department emergency procedures and evacuation routes. Know Know locations of extinguishers in your area and how to use them. Alwaysregardless Always sound the alarm regardless of fire size. Avoid Avoid smoky conditions. Ensure Ensure area is evacuated. Don’t Don’t attempt to fight unless: – Alarm is sounded. small contained – Fire is small and contained. without – You have safe egress route (can be reached without exposure to fire). evacuate – Available extinguishers are rated for size and type of fire. If in doubt, evacuate
Fighting the Fire Sweep side to side Aim low at the base of flames Squeeze the handle Pull the pin P A S S
Summary Combustion process (Fire Tetrahedron). Class A, B, C, D, K fires. Types of portable fire extinguishers: – Operating procedures. – Capabilities and limitations. Basic firefighting concepts: – R.A.C.E. – P.A.S.S.