Don't try this at home!!
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Wow!!!
I've seen a couple things like this, it seems Myth Busters had one as well.
Happens all the time when I see I have just one more gulp of beer left in the can............(maybe not..lol)
very cool- yes it was Mythbusters. Full episode is on Youtube.
Well, that sucks.
this seems to lend credence to the phrase "the air was thick with anticipation"
Nice. Now who is going to do this in O scale.😁
Since they were doing it on purpose in the video they really got the full effect.
This is what happens when you forget to open the vent when emptying the car.
The University of Minnesota physics department used to do a variety of demonstrations at the State Fair. They called themselves the Physics Force. The one that sort of reminds me of this is, at the beginning of the show, they poured boiling water in a 55 gallon drum, and sealed it. They set it aside and went on with the show. About 20 minutes later, when most people had forgotten about it, there was a loud thump as the barrel imploded suddenly. That left an impression.
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Reminds me of what I just delt with. I had to replace a steel 35 gallon gas tank on my Ford van because the gas cap check valve failed and would no longer vent air into the tank as the fuel pump emptied it. The tank ended up collapsing beyond repair. Set me back two grand with labor, tank, and new sending unit.
Also may happen while unloading liquid tank trailers without opening the hatch or air valves. John in Lansing, Illinois
We’ve had the same happen to stainless steel sparger hoppers John. Customer floods a compartment with hot water then starts the pump; neglecting to open one of the hatches first.
Curt
Never seen anything like that, that is really amazing. I guess it takes quite a bit to make that metal deform like that.
Wow...
What interests me most is that the duct tape at all the joints of the piping held out longer than the tank 
Apples55 posted:Wow...
What interests me most is that the duct tape at all the joints of the piping held out longer than the tank
Paul, The duct tape isn't structural, it secures the fittings which couple the hose ends. Most often, Velcro straps are used.
Members may duplicate this in a less dramatic manner starting with an empty one or two liter plastic bottle. Fill it about half way with warm water and replace the cap. Place it in your refrigerator. As the water (and trapped air) cool, the one atmosphere of pressure will collapse the bottle. John
Living in Florida, with potential Hurricanes every year, we need fuel for our generators. Have 6, 5 gallon plastic gasoline containers. After the last hurricane here, I emptied them in my vehicles and stored them in my shed empty. After several months I went out to shed and seen that 2 of them collapsed. I had forgotten to leave cap loosely on. Got lucky though and filling with hot water after a day they returned to their shape and no leaks.
I figured there may have been just a little gasoline and vapors in the containers and the cold weather we had sucked them in.
So they took 65,000 lbs of metal and turned it into......65,000 lbs of metal. Now what are they gonna do with it, blow it back up?
That picture by BigBoy looks like something that Walter White and Jesse would do..........hmmmm........Breaking Bad!
gotta love Mythbusters!!!
J. Motts posted:Never seen anything like that, that is really amazing. I guess it takes quite a bit to make that metal deform like that.
Not really. As Rattler notes below, all it takes is 1 atmosphere of pressure (about 14.7lbs psi). You walk around all day with that burden pressing on you without even noticing it.
Hmm, a new diet scheme? 
At sea level. Atmospheric Pressure. 14.6959 pounds per square inch.
Mike CT posted:At sea level. Atmospheric Pressure. 14.6959 pounds per square inch.
Well, I said "about."
palallin posted:Mike CT posted:At sea level. Atmospheric Pressure. 14.6959 pounds per square inch.
Well, I said "about."
...and depending on the weather 
Jim
If normal atmospheric pressure is nominally 14.7 PSIA then how do you get -27 PSI? How do you get less pressure than a vacuum?
Oops, edited. 0 PSIG is 14.7 PSIA.
Yes, saw this a couple times when plant operators (chemical plant in Deer Park, Texas) incorrectly emptied tank cars on unit sidings. Not quite as spectacular as when one plant operator added inhibitor twice to one tank car, but added none to the second...….. Well, when it began to react (noticed too late to correct), car was pulled out of the plant and placed on outside class yard tracks, surrounded it with water filled tank cars on adjacent tracks, placed water monitors to spray continuous cooling water on "hot" tank car. So, around 3am next day, she blew! Wiped out the surrounding cars, a lot of track, and adjacent high transmission tower/lines. As for vacuum pulled, at end of a unit turnaround, operator "fell asleep at the wheel" pulling vacuum on tower, collapsed 60" stainless steel the down-comer pipe, total of just over 150 ft. of pipe. I made a lot of overtime on that one as night supervisor and crane operator to take down and replace with new pipe. Sometimes I really miss those days and excitement...…. sometimes......
Jesse TCA
