Talk:Boiling liquid expanding vapor explosion: Difference between revisions

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Toronto. Aug 10 2008. A BLEVE?

—Preceding unsigned comment added by 71.61.75.205 (talk) 07:26, 26 August 2008 (UTC)[reply]

"Pronounced Blevy" - does that rhyme with Bevy? Or is it Blee-vee?

It rhymes with 'bevy'.

Mechanism of the explosion?

I do not understand how, after initial rupture, boiling liquid manages to produce pressures HIGHER that the initial pressure in the intact container. This seems to be impossible. Boiling releases more gas. Pressure is rising, and this should be reducing the intensity of boiling. Because at original pressure there were no boiling at all. Moreover, boiling COOLS the liquid.

Something is wrong here. The most simple explanation might be that pressure is not in fact increased so much during BLEVE and it doesn't exceed the original pressure. Just the large amount of produced gas and its significant venting speed at the rupture make BLEVE violent, incorrectly hinting at "high pressure". Does anyone know better? 89.102.37.40 (talk) 19:09, 25 September 2008 (UTC)[reply]

Texas City, TX doesn't belong in this article

The disaster in Texas City in 1947 was caused by exploding ammonium nitrate so I don't think that it should be included in this article. See Texas City Disaster for more information.

wysiwyg 21:25, 19 January 2007 (UTC)[reply]

Someone "corrected" the date from 1978 to 1947, so yes, while the 1947 explosion was not a BLEVE, the one in 1978 was. I guess they get lots of explosions in Texas City. --Bob Mellish 08:00, 30 May 2007 (UTC)[reply]

Question on the thermodynamics after initial rupture - for a non-flammable fluid (say, steam) how can the pressure *increase* over the pre-event vessel pressure. Clearly before the event, the liquid and vapor were in equilibrium; unless heat is added, then there's no additional energy available and therefore the pressure can only fall (if the fluid is supercritical, such as for supercritical cryogenics) or stay constant (as for "conventional" fluids, like water or liquified CO2). So, how can the pressure inside the vessel _increase_?

Is there a cite that clears this up? —The preceding unsigned comment was added by 137.203.128.30 (talk) 18:15, August 23, 2007 (UTC)

Steam explosion not a BLEVE

These two statemetns contradict each other: "When the liquid is water, the explosion is usually called a steam explosion.", and "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)." In my experience, the term BLEVE is restricted to the latter sentance. Fireproeng 07:09, 8 November 2007 (UTC)[reply]

Apparently also known as Blast Leveling Everything Very Efficiently. --Kizor 15:10, 4 February 2008 (UTC)[reply]

I've added an external link about propane BLEVE's. They are the most common pressure vessel ruptures we hear about and I felt some facts instead of videos might be appropriate. Mtt124 (talk) 03:47, 28 February 2008 (UTC)[reply]

Information is incorrect

Information in this article is incorrect. Please note that Bleve can happen with any liquid in a container. Because the container or vessel is holding water, as compared to LPG or Propane, it can still BLEVE. Tanks used in the industry are now required to have pressure relief valves that will open from excess pressure.

A BLEVE can occur when a vessel containing a liquid explodes or ruptures from being exposed to heat. Such explosions can be extremely hazardous. A vessel holding a liquid will build pressure as it is heated and the liquid expands. The liquid will expand exerting force to the container. Unless this pressure is released or heat is removed, an explosion can occur. A vessel that is already venting, can BLEVE if the pressure is not reducing from this venting action. A tell tail to this is the increase of pitch to the venting noise. Also a vessel can BLEVE quicker if the heat weakens the container to the point of failure. 198.50.63.15 (talk) 14:52, 24 June 2008 (UTC) —Preceding unsigned comment added by 198.50.63.15 (talk) 02:05, 10 June 2008 (UTC)[reply]

@@ Line 6: / Line 6: @@
 It rhymes with 'bevy'.
+== Mechanism of the explosion? ==
+I do not understand how, after initial rupture, boiling liquid manages to produce pressures HIGHER that the initial pressure in the intact container. This seems to be impossible. Boiling releases more gas. Pressure is rising, and this should be reducing the intensity of boiling. Because at original pressure there were no boiling at all. Moreover, boiling COOLS the liquid.
+Something is wrong here. The most simple explanation might be that pressure is not in fact increased so much during BLEVE and it doesn't exceed the original pressure. Just the large amount of produced gas and its significant venting speed at the rupture make BLEVE violent, incorrectly hinting at "high pressure". Does anyone know better? [[Special:Contributions/89.102.37.40|89.102.37.40]] ([[User talk:89.102.37.40|talk]]) 19:09, 25 September 2008 (UTC)
 == Texas City, TX doesn't belong in this article ==