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Alternative Fueled
Vehicle Fires
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Who Do You Take Care Of First?
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Hose
PPEHaligan Tool
Radio
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GAS
Gasoline
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Count how manytimes does someone
in a White Shirt
catch the ball.
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Vehicle
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Vehicle + CNG =
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Vehicle + CNG = NGV (Natural Gas Vehicle)
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The differences are: LPG CNG
Power Loss 10 % 20 %
KM / L. 10 KM. 5 KM.
Tank Pressure 10 bar 200 bar
Additional Weight 60 kilo 80 kilo
Conversion Costs 2250 €
4500.- €
Fuel Costs / Liter 0.34 € 0.05 €
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LPG = Liquefied Petroleum Gas
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LPG = Liquefied Petroleum Gas
LNG = Liquefied Natural Gas
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LPG = Liquefied Petroleum Gas
LNG = Liquefied Natural Gas
CNG = Compressed Natural Gas
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Vapor
PressureBTU Rate
Explosive Levels
Flash Point
Boiling Point
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All You Really Need To Know Is:
Both burn HOT, FAST,
and EASILY!
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Auto Fire with
CNG Fuel Tank Explosion
• Dispatch was at 0230 for car fire (E10)
• E10 arrived and requested assistance for a
multiple vehicle fire with possible structural
exposures (freeway columns and overpasses)
• 12 vehicles damaged or destroyed
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Auto Fire with
CNG Fuel Tank Explosion
• CNG vehicle exploded just as Firefighters
approached with a handline and missed them
by approximately 15-23 meters.
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E10 parked outsidethe gate here
Debris from the explosion was thrownup to 30 meters in all directions,
including on the over-passes above
the incident.
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++++
Backhoe
Fuel tank(original location)
Trunk lid
Bumper frame
Roof debris
Roof debris
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Honda CNG Vehicle
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Roof is blown completely offvehicle and doors blown open
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Metal mounting
straps for CNG tank
T k lid
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Trunk lid
Tank landed here,moved down hill to here
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moved down hill to herefor extinguishment
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Rear bumper frame 27m+ away
Bumper shrapnel
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Bumper shrapnelNote burn marks onground.
This is your only warning of
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y y ga CNG – fueled vehicle. Typicallylocated on the trunk lid or bumper
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Composite tank is carbon-fiber / fiberglasswrapped for strength – similar to our SCBA tanks.
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Honda Civic Tank Design
Note: The PRD (pressure relief device) activates similarto a fusible link (it fails versus resealing like a spring-assisted pressure reducing valve – PRV). The gas isvented out the vent tube until the tank is empty.Discharge time depends on fuel level.
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Lessons Learned /Best Practices
• Approach from 45° angle to vehicle ends• Be aware of CNG vehicles
– Cabs, city vehicles, shuttles
• Look for CNG placards
• Watch for other hazards, i.e. bumper struts;
hood and tailgate struts; airbags; burning fuel
runoff; hazardous vehicle contents; explodingtires; other traffic
• Consider cooling streams from a distance
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