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News Large explosion in Tianjin China

  1. Aug 14, 2015 #1

    nsaspook

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  2. jcsd
  3. Aug 14, 2015 #2
    Yeah, when I saw the reporting on Sky News Australia yesterday morning I was shocked at the footage capturing the explosions.
     
  4. Aug 14, 2015 #3

    phinds

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    As the guy in one of the videos said "HOLY S***"
     
  5. Aug 14, 2015 #4

    Borg

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    Last edited: Aug 14, 2015
  6. Aug 14, 2015 #5

    phinds

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    Borg, your link gives a 404
     
  7. Aug 14, 2015 #6

    Borg

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    Looks like the quote didn't pick up the entire link from nsaspook that I quoted. Try it now.
     
  8. Aug 14, 2015 #7

    phinds

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    Yeah got it this time. Pretty cool. MAN that was a big blast for something less than an atomic bomb.
     
  9. Aug 14, 2015 #8

    nsaspook

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    Some drone video of the Aftermath. Tactical nuke range damage.

     
  10. Aug 14, 2015 #9

    berkeman

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  11. Aug 14, 2015 #10

    nsaspook

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    If you loop it in reverse it's easier to analyze.
    It looks like a sharp directional initial explosion that produces a focused compact blob, then a much larger unconstrained explosion with a massive wave-front that moves into the sea.
     
  12. Aug 14, 2015 #11

    Bystander

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    Accidental FAE? Has to happen sooner or later.
     
  13. Aug 14, 2015 #12

    Borg

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    That was my first thought when I originally saw it on the news - way too big for a regular chemical explosion. I feel bad for the firefighters that were killed even though there are reports that their response may have triggered the explosions. Given the sequence of explosions and the reports of water used on unknown chemicals, it wouldn't be surprising. Unfortunately China will cover up the details to the point of it being nothing more than a small fireworks display.
    http://www.reuters.com/article/2015/08/14/us-china-blast-idUSKCN0QH2B220150814
     
  14. Aug 14, 2015 #13

    berkeman

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  15. Aug 14, 2015 #14

    Borg

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    Got out my old Emergency Response Guidebook (1990 - really out of date). I had a very old post-it note on the first page that listed Calcium Carbide, Vinyl Cloride and Hydro Floride. I'm guessing that I wanted to know right away about the worst things that I might run into. :olduhh:

    The current ERG response guide for Calcium Carbide is Guide 138 Substances - Water-Reactive (Emitting Flammable Gases).
    Firefighters will run into burning buildings when everyone else is trying to get out. But, for some things, the advice is to run like hell.
     
  16. Aug 14, 2015 #15

    Bystander

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    https://en.wikipedia.org/wiki/Calcium_carbide "In China, acetylene derived from calcium carbide remains a raw material for the chemical industry, in particular for the production of polyvinyl chloride. Locally produced acetylene is more economical than using imported oil.[11] Production of calcium carbide in China has been increasing. In 2005 output was 8.94 million tons, with the capacity to produce 17 million tons.[12]"
    I got to watch a small acetylene generator go up fifty years ago during a flood --- impressive.
     
  17. Aug 15, 2015 #16
    Apparently calcium carbide and ammonium nitrate were stored in the same building.

    http://uk.reuters.com/article/2015/08/14/uk-china-blast-idUKKCN0QJ01H20150814
     
  18. Aug 15, 2015 #17

    Astronuc

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    Apparently, the site was storing more chemicals than allowed.
    http://news.yahoo.com/china-blast-zone-evacuated-over-chemical-contamination-fears-071734470.html [Broken]
    and
    Storing oxidizers like nitrates and fuel like metal carbides (if potentially in contact with water) is a big No-No.

    Somebodies were looking the other way, while somebodies were violating the law (or was it a rule or guideline?).

    It reminds me of the detonation of ammonium nitrate on a ship docked near Texas City in 1947.
    http://www.texascity-library.org/disaster/first.php
    https://en.wikipedia.org/wiki/Texas_City_disaster
     
    Last edited by a moderator: May 7, 2017
  19. Aug 15, 2015 #18

    mheslep

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    This photo of a new car lot gives some idea of the blast effect. Every single vehicle identically destroyed with all glass windows blow out(in?), tires burned off, up to ~1/2 mile away.

    aftermath-of-the-explosion-in-a-chinese-port-city.jpg

    See the similarities between vehicles nearby the Texas City 1947 amonium nitrate explosion (hat tip Astronuc)

    1280px-Txcitydisasterparkinglot.jpg
     
    Last edited: Aug 15, 2015
  20. Aug 15, 2015 #19

    Astronuc

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    I thought the same thing when I saw the pictures of the cars in Texas City and the lot of cars in Tianjin.

    I suspect some heads will roll.
     
  21. Aug 15, 2015 #20

    nsaspook

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    They must have a large head count by now.
    http://content.time.com/time/world/article/0,8599,2007319,00.html
    From 2010:
     
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