Skip to comments.Boise Bus Turns Into Fireball
Posted on 03/22/2007 11:52:10 AM PDT by Keyes2000mt
BOISE - A massive bus fire torched a ValleyRide coach during the peak of the Thursday morning rush hour.
It happened in downtown Boise at about 8:30 a.m. Flames shot out of the back of the bus - snarling traffic. The Associated Press reports the driver of the vehicle was taking a break when the fire broke out. Another drive saw the flames and quickly called 911.
The coach is powered by compressed natural gas.
Fire Department Captain Tom Pawek told the AP that a venting system prevented a large natural gas explosion.
A number of fire engines and paramedics responded to the scene, and Boise Police closed down Main Street between 9th and Capitol. The flames were extinguished by 8:45 a.m.
This is at least the third time this type of Boise bus has ignited - with the most recent incident happening late last year - and a prior incident occurring in the late 1990s.
Why I don't ride the Bus, perhaps they should change the motton on the back that says, "Natural Gas Clean Machine" into, "Rolling Gas Barbecue."
Here's a bus. You first.
CNG + lazy unionized motor pool mechanics and employees = KABOOM!
I once had a conversation with a bus mechanic for the City of Mesa, AZ. He told me that CNG is a terrible motor fuel and it is nearly impossible to get the buses to run well on a continuous basis.
The same thing happened in Atlanta about five weeks ago. The bus caught fire underneath the largest overpass in the area and was abandoned by the driver, who was the only one on board at the time. It was an inferno and the fear was that the CNG tanks would explode, but fortunately they didn't. The results were gridlock. Some cars were stuck in traffic for six hours or more.
Do you intend to post every little mishap in Boise?
OK, I'll go first and say, "Practice Run". :-)
Boise comment: "C'mere. Hold my sheep and watch this....."
Well you do know what the main export of Djibouti is....:)
As a guy who likes his freedom, I loathe public transportation. Every time someone here at work says "boy, wouldn't it be great if we had light rail in this town", I want to challenge them to a duel or something.
Then there's the good ol' fashioned retorts of "well, you wouldn't have to drive all around downtown polluting the air and killing the trees". Um, okay, if you don't want to drive, park in the parking garage on Main, get off your arse and WALK!
Hmmmm....well, recently a transplanted Californian was hired to mow it. There's a good start :)
Liquid Expanding Vapor Explosion (BLEVE) - The explosion associated with the sudden failure of a container whose contents are a flammable liquefied compressed gas. Typically a BLEVE is due to flame impingement which causes an increased pressure inside the vessel and a weakening of the vessel material. Upon rupture, the pressure inside the vessel is immediately reduced to atmospheric pressure. At atmospheric pressure, the contents of the vessel instantly boil and vaporize. The vapors of the material occupy several hundred times the space that the liquid had required. This produces a quickly expanding vapor cloud which can be ignited causing a massive explosion and fireball.
If you need graphics, check out this brief video:
Slower connections may want to just look at pictures of bleve testing:
An LPG railcar tank bleve resulted in such a powerful explosion that it tore the tank car in half and threw each end more than half a mile down the tracks in opposite directions. The two ends were almost a mile apart afterward, and everything for 1,000ft around the blast area got a severe torching from the fireball.
Readers should get a clue from standard firefighting procedure whnever a tank bleve is possible: set an unmonitored hose to direct a constant stream of water against the tank and get all personnel out of the area.
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