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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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