Essentials of Fire Fighting - Montgomery County …© 2007 Montgomery County Fire/Rescue Training...
Transcript of Essentials of Fire Fighting - Montgomery County …© 2007 Montgomery County Fire/Rescue Training...
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© 2007 Montgomery County Fire/Rescue Training Academy - Recruit Fire Fighter Training Program
The Essentials of Fire Fighting
Self-Contained Breathing Apparatus
Developed by Captain Mark E. Davis & Captain David Polikoff Edited and updated in 2007 by Lt. Larry Murray
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Student Performance Objective
The student shall demonstrate the proper inspection and use of an SCBA as part of the personal protective envelope, while wearing full-protective clothing, to a practical test accuracy of 100%.
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Overview• Common Hazardous
Atmospheres• Gas Toxicity• SCBA Limitations• Types of Breathing
Apparatus• SCBA Wearer
Requirements• SCBA Parts ID
• Scott 4.5 & Air-Pack Fifty
• Donning & Doffing• Inspection &
Maintenance• Emergency
Procedures• Cleaning & Refilling
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Elevated Temperature
• Rapid inhalation of heated air 120 + can cause acute hypotension
• edema in lungs, asphyxiation
• possible pneumonia / death
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Smoke• Suspended particles of
carbon, tar, and dust• provides location for
condensation of gaseous products
• may be simply irritating - possibly fatal
• larger smoke particles filtered by nasal hair and mucous membranes
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Toxic Gases
• direct damage to lungs• passes into blood stream to impair O2
carrying capacity• synergistic effect• severity depends on: nature of
combustible, rate of heating, temperature of evolved gases, O2 concentration
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1st. Noticeable sign is faster breathing17 % muscular impairment12 % dizziness, headache, fatigue9 % unconsciousness6 % death
Oxygen Deficiency
• 1st. Noticeable sign is faster breathing• 17 % muscular impairment• 12 % dizziness, headache, fatigue• 9 % unconsciousness• 6 % death
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Gas Toxicity
• Carbon Monoxide• Carbon Dioxide• Hydrogen Chloride• Hydrogen Cyanide
• Nitrogen Dioxide• Phosgene• Ammonia• Chlorine
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TOXIC GAS SENSIBILITY IDLH CAUSED BY MISC.
Carbon Dioxide (CO2)
Colorless, Odorless
40,000 ppm Free-Burning End products of complete combustion of carboniferous mat.
Carbon Monoxide (CO)
Colorless, Odorless
1200 ppm Incomplete Combustion
Cause of most fire related deaths
Hydrogen Chloride (HCl)
Colorless to slightly yellowish, pungent odor
50 ppm Burning plastics Irritates eyes and respiratory tract
Hydrogen Cyanide (HCN)
Colorless, bitter almond odor
50 ppm Burning of wool, nylon, foam rubber
Chemical asphyxiant hampers resp. at the cellular level
Nitrogen Dioxide (NO2)
Reddish brown, pungent, acrid odor
20 ppm Given off around silos or grain bins
Irritates nose and throat
Phosgene (COCl2)
Colorless odor of musty hay, tastless
2 ppm Produced when refrigerants such as freon contact flame
Forms Hydrochloric acid in the lungs
Toxic Atmospheres
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Types of Breathing Apparatus
• Open -Circuit Self-Contained Breathing Apparatus (SCBA)
• Compressed breathing air is supplied to the user’s respiratory system from a cylinder carried on the user’s back. Exhaled air is released to the atmosphere.
• SCBA is the most common type of respiratory protection used in the fire service.
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Types of Breathing Apparatus
Open Circuit Self-Contained Breathing Apparatus (SCBA)
SCOTT AVIATION MSA DRAEGER
The three brands of SCBA most commonly used in the USA.
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Types of Breathing Apparatus
Open Circuit Supplied Air Breathing Apparatus (SABA)
Compressed breathing air is supplied from a remote location using a long air hose, Exhaled air is released to the atmosphere.
Reserved for special rescue and hazardous materials operations –not used for fire attack.
5-minuteEscape Cylinder
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Types of Breathing Apparatus
Closed-Circuit Breathing Apparatus (Rebreather)
• A rebreather does not use compressed air. Instead, the user’s exhaled air is chemically scrubbed of CO² and a small amount of 0² is added from a cylinder contained in the unit.
• Rebreather’s commonly have long durations of use which are advantageous in extended rescue operations such as mine rescue. Rebreathers are not used for fire attack operations.
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Types of Breathing Apparatus
Closed – Circuit Breathing Apparatus
A Bio Marine 240® is one example of a modern, closed-circuit breathing
apparatus.This unit is rated for a 4-hour
Use.
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Montgomery County SCBA
• Bethesda Chevy Chase Rescue Squad - Uses the Cairns SCBA
• All other MCFRS stations use the Scott 4.5 SCBA or the Scott 50 Pak.
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Scott 4.5 SCBA
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Face piece
Donning Switch
High Pressure Airlines
Pressure Reducer Assembly
Waist Straps
PASS Control Console Assembly
E.B.S.S.
Shoulder Straps
Face piece Head Net
Purge Valve
Regulator
High Pressure CouplingCylinder Gauge
PASS Sensor Module Assembly
Cylinder
Cylinder Valve
Cylinder Strap
Schrader Fitting
Low Press. Airlines
SI6581
© 2002 MCFRTA Recruit Fire Fighter Training Program
Remote Pressure Gauge
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© 2007 Montgomery County Fire/Rescue Training Academy - Recruit Fire Fighter Training ProgramSCOTT AIRSCOTT AIR--PACK FIFTY PACK FIFTY
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CONTROL C
EBSS
DS-UP & REGULATORUICK DISCONNECT
RIC UACSYSTEM
CONNECTOR
TRI-SLIDE BUCKLE
AV3000 FACE PIECE
UP DISPLAYULATOR
PASS Sensor ModuAssembly and Batte
Pack
RACHUTE BUCKLE
Pressure Reducer
Cylinder
Shoulder Strap
Regulator Protection Cup
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HARNESS• Constructed of a lightweight
aircraft aluminum alloy, the back frame follows the shape of the user’s back.
• The back frame places the bulk of the SCBA’s weight on the user’s hips, where wrap-around wings provide comfortable hip support.
• Results in a design intended to minimize shoulder fatigue and give the user maximum freedom of movement.
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CONTROL CONSOLEFeaturing Automatic Activation
Of PASS Device
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HEADS-UP REGULATORQUICK DISCONNECT
When Reconnecting, Make Sure You Align The HEADS-UP Display PlugWith The Mating Connector To Prevent Damage
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CBRN REGULATOR
Donning Switch
Purge Valve
Heads-Up Display
Facepiece Lock
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HEADS-UP DISPLAY
¼ REDLIGHT
(FLASHING RAPIDLY)
½ YELLOWLIGHT
(FLASHING SLOWLY)
¾ GREENLIGHT
FULL GREENLIGHT
LOW BATTERY WARNING
(RED)
2 GREEN LIGHTS = FULL CYLINDERONE GREEN LIGHT = 3/4 CYLINDER
ONE FLASHING YELLOW = 1/2 CYLINDERONE FLASHING RED = 1/4 CYLINDER
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Scott 4.5 AV2000 Face PiecePolycarbonate Lens
PBI/Kevlar 4-point Harness
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Scott AV2000® Face Piece
We use three sizes of face pieces:
Small has a green rubber seal.
Large has a black rubber seal.
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AV 3000 FACE PIECE
Sleek Low Profile Improves Downward And Peripheral VisionSix-point Quad Adjustment Head HarnessDual Voicemitters For Clearer Communications
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LOANER
UNIT
AV 3000 FACE PIECE
RED WEBBING INDICATES UNIT FACE PIECEBLUE WEBBING INDICATES LOANER FACE PIECE
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AV3000 FACEPIECE
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RIC UAC CONNECTION
RIC UACRELIEF VALVE
UNIVERAL AIR CONNECTION
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RIC UAC CONNECTION
UNIVERAL AIR CONNECTION
RIC PAK
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RIC UAC CONNECTIONAIRAIR--PAK respirators in PAK respirators in compliance with NFPA compliance with NFPA 1981 are fitted with a 1981 are fitted with a Rapid Intervention Crew Rapid Intervention Crew Universal Air Connection Universal Air Connection System which permits System which permits emergency emergency replenishment of an replenishment of an approved SCBA approved SCBA breathing air supply breathing air supply cylinder on a user’s cylinder on a user’s respirator from an respirator from an approved air supply approved air supply source while in use.source while in use.
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45-Minute Cylinder
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SCBA Cylinder
Kevlar Wrapped Aluminum 30-Minute Cylinder
Fiberglass Wrapped Aluminum 30-Minute Cylinder
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SCBA Cylinder
Carbon Fiber/ KevlarWrapped Aluminum Cylinder
All MCFRS companies are transitioning to these 45-minute cylinders
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SCBA Cylinder Valve
Cylinder Valve KnobHigh Pressure
Connection
Cylinder Gauge
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All Cylinders Must Have a Current Hydrostatic Test Label
Month
Year
SCBA Cylinder Information
Cylinder Pressure
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Scott SCBA Important Data
• Maximum cylinder pressure is 4500 psi• SCBA operating pressure is 100 psi• 30-minute cylinders hold 45 cu ft of air• 45-minute cylinders hold 66 cu ft of air• 60-minute cylinders hold 87 cu ft of air• VibraAlert activates at ¼-cylinder capacity• Hydrostatic test needed every 3-years on
composite cylinders.
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Scott SCBA Important Data
• MOSH NIOSH certified• Weight 30 min. 21 lbs..• Weight 45 min. 27 lbs..• Weight 60 min. 32 lbs..
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SCBA Inspection
• Daily Inspection– Cylinder is full (>4000psi), VibraAlert®
functions, purge valve and donning switch operate properly, face piece is in good condition, PASS device operates properly.
• Monthly Inspection– Check all components for deterioration,
clean and disinfect the regulator.
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SCBA Maintenance
• Preventive Maintenance & Repair– SCBA Repair Shop 240-777-2221– SCBA repair technicians are Scott certified and
are the only personnel authorized to repair MCFRS SCBA.
– Annual preventive maintenance is performed on all MCFRS
– SCBA repairs are made on an as needed basis by completing a repair tag and forwarding the item to the repair shop.
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SCBA Repair Request Form
Must be completed for all SCBA repairs
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SCBA Donning & Doffing
• Donning– PPE in-place– Check unit– Don
• Doffing– Face Piece Removal– Harness– Replace Cylinder
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SCBA Donning
1 2
3 4
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Donning the Face Piece
1 2
3 4
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Doffing the SCBA
• When doffing (removing) the SCBA and face piece, simply reverse the donning order.
• Restore the unit to its original condition ensuring that all straps are extended.
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Replacing the Cylinder
1
3
2
4
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SCBA Emergency Procedures
• Face Piece Failure• Breathing Regulator Malfunction• Pressure Reducer Malfunction• Air Depletion
You will learn these procedures in the practical sessions.
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Emergency Breathing Support System (EBSS)
EBSS May Save Your Life!
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SCBA Cleaning
• SCBA unit– Mild soap and water using a scrub brush.– Do not submerse components in water!– Do not submerse an integrated PASS in water!
• Face piece– Mild soap and water using a soft cloth.– Can use an approved disinfectant if needed.
• Breathing regulator– Multi-wash solution– 6 sprays, wait 10-minutes, – Rinse with spray bottle of clean water
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Refilling SCBA Cylinders• Cylinders are refilled based upon the principle of air
moving from high pressure to low pressure.
• Cylinders are refilled using either a storage bank of larger cylinders (cascade system) or a breathing air compressor system, or a combination of both.
• All safety guidelines must be followed in order to prevent injuries should a cylinder rupture during refilling operations.
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ShieldedFill
Station
StorageTanks
BreathingAir
Compressor
Refilling SCBA Cylinders
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Refilling SCBA Cylinders
A typical fill station
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Refilling SCBA CylindersAir 16
MCFRS operates three, mobile air units capable of refillingSCBA cylinders at the emergency scene.
Air 33 from Station 33, Air 16 from Station 16 and Air 1 from Rescue Co 1
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Review
• Common Hazardous Atmospheres
• Gas Toxicity• Types of Breathing
Apparatus• SCBA Wearer
Requirements
• SCBA Limitations• Scott 4.5 SCBA• Inspection &
Maintenance• Donning & Doffing• Emergency
Procedures• Cleaning & Refilling
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This program was developed by the Montgomery County Fire/Rescue Training Academy
© 2007No part may be used or copied without the
expressed written consent of the Training Officer.
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© Copyright 1998, Board of Regents, Oklahoma State UniversityAll Rights Reserved. No part of this presentation may be reproduced
without prior written permission from the publisher.
All of the color drawings for this presentation were developed and: