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PPT-SM-FIRESFTY V.A.0.0
Fire Theory Definition of fire • Rapid, persistent chemical change that releases
heat and light • Accompanied by flame • Produces rapid oxidation
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PPT-SM-FIRESFTY V.A.0.0
Fire Tetrahedron A fire needs four main elements to occur 1. Fuel 2. Oxygen 3. Heat 4. Chemical reaction
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PPT-SM-FIRESFTY V.A.0.0
Fire Classification NFPA’s fire classification system is based on primary fuel
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A Solid
combustibles
B Hydrocarbon and alcohol
based liquids and gases
C Energized electrical
equipment
D Flammable
metals
K Kitchen fires
PPT-SM-FIRESFTY V.A.0.0
Workplace Fire Hazards Common workplace fire hazards • Heating, electrical and mechanical equipment • Storage and handling of combustible materials • Proximity hazards • Unauthorized smoking and poor smoking areas • Conventional cooking
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PPT-SM-FIRESFTY V.A.0.0
Fire Prevention • Purpose
– Assess potential fire hazards – Find ways to reduce risk of starting a fire – Find ways to reduce risk of injury
• Fire prevention includes – Educating workers – Limiting ways a fire can start – Limiting injuries – Preparing workplace for a fire disaster
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PPT-SM-FIRESFTY V.A.0.0
Fire Prevention Plan • Companies must develop a fire prevention plan • The plan must cover
– Potential fire hazards – Procedures for fire prevention – Fire evacuation plans
• Plan must be in writing and available to workers
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PPT-SM-FIRESFTY V.A.0.0
Sources of Ignition • Inspect jobsite for sources of ignition • Identify and remove unnecessary materials • Remove sources of ignition
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PPT-SM-FIRESFTY V.A.0.0
Sources of Ignition Potential sources of ignition • Tool selection • Electrical equipment • Static electricity • Flash fires • Hot work • Kitchen fires • Other fire prevention considerations
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PPT-SM-FIRESFTY V.A.0.0
Prevention Good fire prevention • Keep work areas clean and clutter free • Know hazards of chemicals you work with • Respect smoking restrictions • Dispose of combustible materials • Change oil soaked or contaminated clothing • Clean up chemical spills and oil immediately
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PPT-SM-FIRESFTY V.A.0.0
Protection Good fire protection practices • Maintain and inspect all equipment routinely • Keep fire lanes open and unobstructed • Never block access to firefighting equipment • Never move equipment or alter it in any way
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PPT-SM-FIRESFTY V.A.0.0
Protection • Essential part of workplace safety • Forms of protection include
– Detection systems – Portable extinguishers – Fixed extinguisher systems – Alarms – Trained fire brigades
• Properly trained workers take part in the fire prevention system
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PPT-SM-FIRESFTY V.A.0.0
Fire Detection • Alert workers to the presence of fire • Three forms of fire detection
– Heat – Smoke – Flame
• Alarms must work at all times • Maintenance and repairs
– Done by qualified and designated workers
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PPT-SM-FIRESFTY V.A.0.0
Alarm Systems • Warns workers of fire • Must have distinct sound • Qualified worker must
service, maintain and test
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PPT-SM-FIRESFTY V.A.0.0
Fire Extinguishing • Fire extinguishers eliminate elements of fire
tetrahedron • If tetrahedron is broken, fire will go out • Additional cooling and water may be necessary
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PPT-SM-FIRESFTY V.A.0.0
Methods Extinguishing methods include • Cooling and quenching • Smothering and blanketing • Oxygen dilution • Fuel removal • Chemical flame inhibition
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PPT-SM-FIRESFTY V.A.0.0
Methods • Cooling and quenching
– Reduces temperature of fuel below ignition temperature
• Smothering and blanketing – Separates fuel from oxygen
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PPT-SM-FIRESFTY V.A.0.0
Methods • Oxygen dilution
– Reduces amount of available oxygen
• Fuel removal – Removes fuel source
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PPT-SM-FIRESFTY V.A.0.0
Methods Chemical flame inhibition • Interrupts combustion reaction • Stops flaming • Effective on gas and liquid fuels
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PPT-SM-FIRESFTY V.A.0.0
Extinguisher Use To properly extinguish a fire use the PASS method • Pull the pin • Aim at the base of the fire • Squeeze lever • Sweep back and forth
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PPT-SM-FIRESFTY V.A.0.0
Extinguisher Use Training • Must be delivered by a qualified person • Should be conducted at
– Initial employment – At least annually thereafter
• Must cover – Selecting correct type of extinguisher – Discharging extinguisher in emergency situation
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PPT-SM-FIRESFTY V.A.0.0
Training Train workers on • What to do during an emergency • Specific fire hazards • Escape procedures • Equipment use
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PPT-SM-FIRESFTY V.A.0.0
Training If you catch on fire • Do not run • Drop where you are • Cover face with hands • Roll around to smother
flames
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Stop, drop and roll.
PPT-SM-FIRESFTY V.A.0.0
Worker Responsibility • Read warnings on product labels and MSDS • Ask supervisor if any questions arise • Turn off all electrical appliances • Obey no smoking signs • When evacuating, do not use the elevator • Keep low on hands and knees • Touch door handles gently with back of hand • If outdoors, keep wind behind you
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