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| What the fuck is your problem you @$@$*&&#%&##%&!@$#$&@$%T~@$#%*$%^!@%&*%&@#%$#^#$%^*$@!%&^*@$%#@%&^T&U($&@#$%*&*()$^&#%&*(*#%*(^#W$^$&( &*($&#%*%^%&%^&#$%^Y&#%&(&*(%&%^*$^&*%^&*^%^**^*%&$#&$%(^%#$^@$#@#@#&&*)&*_)&@#%@!#$@^%&(&*)*)(_*()&@#%!@$!#$@#$~#%#%&^)(*_@!##$@! You are such an ass you god damn fuckhead! You suck BS! You son of a mother fucking bitch! How dare you insult my edits! You're obviously an inferior of mine shitbag. You faggage!Your malajested principles and overly social tendencies, are the product of your berzerk or otherwise debilitated pituitary gland-on which there is still a debate on weather or not it exists along withyour shit-filled brain which is the size of a pixel!!!! | |||
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| '''BLEVE''', pronounced {{IPA|/ˈblɛvi/}} ("blevvy"), is an ] for "'''boiling liquid expanding vapour explosion'''". This is a type of ] that can occur when a vessel containing a ] ] is ruptured. Such explosions can be extremely hazardous. | |||
| A BLEVE can occur in a vessel that stores a substance that is usually a ] at ] but is a ] when pressurized (for example, ]). The substance is stored partly in liquid form, with a gaseous vapour above the liquid filling the remainder of the container. | |||
| If the vessel is ruptured — for example, due to ], or failure under pressure — the vapour portion may rapidly leak, lowering the pressure inside the container and releasing a wave of ] from the point of rupture. This sudden drop in pressure inside the container causes violent ] of the liquid, which rapidly liberates large amounts of vapour in the process. The pressure of this vapour can be extremely high, causing a second, much more significant wave of overpressure (an explosion) which may completely destroy the storage vessel and project fragments over the surrounding area. BLEVEs can also be caused by an external fire near the storage vessel causing heating of the contents and pressure build-up. | |||
| A BLEVE can occur even with a non-] substance, sometimes one that's known for being extremely cold, like ] or ] or other refrigerants or cryogens, and therefore is not usually considered a type of ]. However, if the substance involved ''is'' flammable, it is likely that the resulting cloud of the substance will ignite after the BLEVE has occurred, forming a fireball and possibly a ], also termed a vapour cloud explosion (VCE). If the materials are toxic, a large area will be contaminated.<ref>http://maecourses.ucsd.edu/ceng124/pdfs/safety-notes.pdf accessed 2006-11-04</ref> | |||
| Significant industrial BLEVEs include accidents at ] in ] in ], ] in ], ] in ], and ] in ] in ]. In ], a BLEVE occurred after a road accident with an LPG truck in the ] in ]. | |||
| Some fire mitigation measures are listed under ]. | |||
| == References == | |||
| <references/> | |||
| ==See also== | |||
| *] | |||
| *] | |||
| ==External links== | |||
| * — An account of the ], ] explosion in Kingman, with photographs. | |||
| * - Video of propane BLEVEs at a Bucheon LPG filling station in Korea (September 11, 1998). | |||
| * - Video of propane and isobutane BLEVEs from a train derailment at Murdock, Illinois (September 3, 1983). | |||
| * - Description of circumstances required to cause a propane tank BLEVE. | |||
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Revision as of 01:03, 26 May 2008
BLEVE, pronounced /ˈblɛvi/ ("blevvy"), is an acronym for "boiling liquid expanding vapour explosion". This is a type of explosion that can occur when a vessel containing a pressurized liquid is ruptured. Such explosions can be extremely hazardous.
A BLEVE can occur in a vessel that stores a substance that is usually a gas at atmospheric pressure but is a liquid when pressurized (for example, liquefied petroleum gas). The substance is stored partly in liquid form, with a gaseous vapour above the liquid filling the remainder of the container.
If the vessel is ruptured — for example, due to corrosion, or failure under pressure — the vapour portion may rapidly leak, lowering the pressure inside the container and releasing a wave of overpressure from the point of rupture. This sudden drop in pressure inside the container causes violent boiling of the liquid, which rapidly liberates large amounts of vapour in the process. The pressure of this vapour can be extremely high, causing a second, much more significant wave of overpressure (an explosion) which may completely destroy the storage vessel and project fragments over the surrounding area. BLEVEs can also be caused by an external fire near the storage vessel causing heating of the contents and pressure build-up.
A BLEVE can occur even with a non-flammable substance, sometimes one that's known for being extremely cold, like liquid nitrogen or liquid helium or other refrigerants or cryogens, and therefore is not usually considered a type of chemical explosion. However, if the substance involved is flammable, it is likely that the resulting cloud of the substance will ignite after the BLEVE has occurred, forming a fireball and possibly a fuel-air explosion, also termed a vapour cloud explosion (VCE). If the materials are toxic, a large area will be contaminated.
Significant industrial BLEVEs include accidents at Feyzin in France in 1966, Kingman, Arizona in 1973, Texas City, Texas in 1978, and San Juan Ixhuatepec in Mexico in 1984. In 1978, a BLEVE occurred after a road accident with an LPG truck in the Los Alfaques Disaster in Spain.
Some fire mitigation measures are listed under liquefied petroleum gas.
References
- http://maecourses.ucsd.edu/ceng124/pdfs/safety-notes.pdf accessed 2006-11-04
See also
External links
- History of Kingman Regional Medical Center — An account of the July 5, 1973 explosion in Kingman, with photographs.
- Propane Tank Explosion Takes out City Block... TWICE - Video of propane BLEVEs at a Bucheon LPG filling station in Korea (September 11, 1998).
- Huge Explosions - Video of propane and isobutane BLEVEs from a train derailment at Murdock, Illinois (September 3, 1983).
- Propane Tank Explosions - Description of circumstances required to cause a propane tank BLEVE.