|
Philip J Fry posted:So, uhm, don't drive around with leaky acetylene tanks in your FJ. Or something. I don't know if this is a detriment or a plus to my love of FJ's. I wonder if he drove it to the insurance lot like that? 
|
#
?
Dec 6, 2011 23:48
|
|
|
|
| # ? Apr 24, 2024 00:38 |
|
|
Philip J Fry posted:Protect yourself from Mayhem, like me.
|
|
#
?
Dec 7, 2011 00:27
|
|
|
GnarlyCharlie4u posted:"Airing it out" probably only allowed for the proper mix of oxygen to allow the acetylene to go  .
|
|
#
?
Dec 7, 2011 01:08
|
|
|
 Holy poo poo how in the nine hells was that guy not reduced to a fluid.
|
|
#
?
Dec 7, 2011 01:29
|
|
|
I imagine this has been posted already: http://en.wikipedia.org/wiki/Ryongchon_disaster  The exact cause is unknown due to the usual DPRK secrecy, but its believed that a train carrying fuel arrived at the same time, on the same tracks as a train carrying dynamite. The explosion was massive, some of the debris landed in China.
|
|
#
?
Dec 7, 2011 01:36
|
|
|
Crustashio posted:So the guy smells the gas in his truck, and decides to start it up anyway? This is the part that gets me the most. He can't be too bright having a bottle of acetylene in a closed vehicle like that; this was just waiting to happen to some dumbass like this.
|
|
#
?
Dec 7, 2011 02:16
|
|
|
Epic Fail Guy posted:I imagine this has been posted already: Assuming that is the BBC photo, the Wiki you posted says that is actually Baghdad.
|
|
#
?
Dec 7, 2011 04:19
|
|
|
Ridge_Runner_5 posted:Assuming that is the BBC photo, the Wiki you posted says that is actually Baghdad. Different picture. That one is from here: http://www.globalsecurity.org/military/world/dprk/ryongchon-imagery.htm
|
|
#
?
Dec 7, 2011 04:23
|
|
|
That photo is accurate. The old (not exploded) footage is still live on Google Maps - here it is, turn your head about 70 degrees clockwise and you should recognize it (use tracks and the large vertical road at the left as a reference): http://g.co/maps/jc3ky
|
|
#
?
Dec 7, 2011 04:28
|
|
|
nmfree posted:I think the emote you're looking for is What gets me is that he was storing a tank without the heavy caps over the valves that keep this from happening. Every time I think about moving a tank I imagine how easy it would be to knock the valve into something or drop the tank onto the valve or something. Gives me the willies. Don't welding instructors always drill that into you? Always use the cap!
|
|
#
?
Dec 7, 2011 04:48
|
|
|
Raluek posted:What gets me is that he was storing a tank without the heavy caps over the valves that keep this from happening. Every time I think about moving a tank I imagine how easy it would be to knock the valve into something or drop the tank onto the valve or something. Gives me the willies. Don't welding instructors always drill that into you? Always use the cap! Not to mention the whole "instant unguided missile" thing should the valve break off entirely.
|
|
#
?
Dec 7, 2011 04:51
|
|
|
Boat posted:Not to mention the whole "instant unguided missile" thing should the valve break off entirely. Yeah it's not like acetylene is unstable or anything.
|
|
#
?
Dec 7, 2011 04:59
|
|
|
Raluek posted:What gets me is that he was storing a tank without the heavy caps over the valves that keep this from happening. Every time I think about moving a tank I imagine how easy it would be to knock the valve into something or drop the tank onto the valve or something. Gives me the willies. Don't welding instructors always drill that into you? Always use the cap! The little consumer sized tanks don't have caps.
|
|
#
?
Dec 7, 2011 05:03
|
|
|
Small tanks like a portable torch don't usually have caps. I think they are insane. Lets take a brilliant safety device and not install it on the tanks that are most likely to be moved around and stored carelessly. drat.
|
|
#
?
Dec 7, 2011 05:11
|
|
|
poo poo, I didn't know that. That's crazy, for the reasons you mentioned. I've only worked with the larger tanks, and only briefly - who thought that was a good idea? If it's small, it'll only blow your truck up a little bit?
|
|
#
?
Dec 7, 2011 05:15
|
|
|
My tanks don't have caps... I should probably see if I can find some to buy that will fit. Any idea if they take the same size cap as the big-boy tanks? When I transport my torch tanks (oxy/ace) in an enclosed vehicle, I roll with all the windows open, and check the valve before I put it in, which is right before I turn the car on. And it only stays in the car as long as it takes to drive where I am going. I really don't like the chance of explosions. Normally I try to use the pickup to transport those tanks. I am a bit less worried about the 75/25 tank simply because it won't explode. Still the risk of asphyxiation though.
|
|
#
?
Dec 7, 2011 05:39
|
|
|
Saw the before and after, made a gif. (not the best quality) And if you just want the two frames I overlapped:  
|
|
#
?
Dec 7, 2011 06:29
|
|
|
Now that I look at it again, only the railroad, major buildings, and major roads line up. The footage on google earth seems more organized, there is a chance that it's post disaster footage and they used the opportunity to rearrange streets and build things on a proper grid instead of the random roads that were there before. e: I think I can still see some scorching on the ground in the railyard around Ground Zero, too.
|
|
#
?
Dec 7, 2011 06:38
|
|
|
Raluek posted:What gets me is that he was storing a tank without the heavy caps over the valves that keep this from happening. Every time I think about moving a tank I imagine how easy it would be to knock the valve into something or drop the tank onto the valve or something. Gives me the willies. Don't welding instructors always drill that into you? Always use the cap! More valve failure fun! https://www.youtube.com/watch?v=8VOwkvTh-Go Happened a few miles from my house. I've bought acetylene there before.
|
|
#
?
Dec 7, 2011 18:03
|
|
|
the poi posted:b) Nitrogen-filling tires isn't to get the oxygen out, it's just to keep it free of water. Pumping in atmospheric air puts a good deal of water in the tire, which will change the tire pressure greatly as it vaporizes and condense.
|
|
#
?
Dec 7, 2011 18:13
|
|
|
MadScientistWorking posted:Its pretty much a scam. A good air compressor is going to pumping in dry air regardless of whether or not you're atmospheric air. Only if you've got a drier in the line after the compressor. Water will still collect on hot & humid or rainy days even in new compressors.
|
|
#
?
Dec 7, 2011 19:29
|
|
|
Ever wonder what happens when a fire starts at an acetylene bottler?  http://www.youtube.com/watch?feature=player_detailpage&v=gWBUoWigKCc#t=1426s quote:Overheated tanks up to four feet tall exploded and shot into the air. One shot through a wall at Reunion Arena, about 3/8 of a mile away, and at least three landed in the parking lot. Another landed on I-35E, Dallas Fire-Rescue officials said. Happened in Dallas a few years ago. To add to the failure fun, Dallas PD/FD didn't bother closing I-35 until well after the tanks were flying, as you can see in another video: http://www.youtube.com/watch?v=SyUVswUkEIA http://www.texas-fire.com/forum/showthread.php?t=4011 has a bit more info on it. randomidiot fucked around with this message at 19:40 on Dec 7, 2011 |
|
#
?
Dec 7, 2011 19:33
|
|
|
some texas redneck posted:Ever wonder what happens when a fire starts at an acetylene bottler? The must suck so much, being a firefighter and not being able to do a damned thing about a fire. Even if a bottle of acetylene is consumed by fire and doesn't explode (not heated for long enough) it's still dangerous, even if the bottle has been cooled down. That said, oxyacetylene cutters are soooo fun.
|
|
#
?
Dec 7, 2011 21:06
|
|
|
trouser chili posted:More valve failure fun! quote:On January 12, 2006, at approximately 3 AM in the morning, an explosion occurred in the Chemistry Building (Building Number 484). The explosion was centered in Laboratory 30lA of the 28 Wing, causing extensive damage to 30 I A from a blast wave of unknown origin...Subsequent investigation revealed a massIve explosion had occurred, blowing out two windows in 301A, the wall leading into the hallway, and that a cylindrical hole approximately 24 inches in diameter had been blown through the ceiling. A nitrogen cylinder was found lying in the penthouse mechanical room, its forward momentum apparently stopped by piping in the mechanical room. Damaged piping had caused significant water damage throughout the wing. Additionally, a support beam under where the tank explosion had occurred had sustained significant structural damage in Room 201A. A hood in 30lA was completely destroyed as was a chemical glove box; the wall adjoining 301 B was also significantly damaged. This, children, is why you don't replace your 230psi relief valve and 400psi rupture disk with pipe plugs:   I love that it stripped the tiles off the floor. Phanatic fucked around with this message at 21:49 on Dec 7, 2011 |
|
#
?
Dec 7, 2011 21:08
|
|
|
I wish I could find it, but I believe in this very thread (IIRC) is a long conversation detailing how a surprising percentage of the people who deliver/store liquid nitrogen are oftentimes extreme yobbos who seem to have no problem
|
|
#
?
Dec 7, 2011 21:37
|
|
|
some texas redneck posted:Ever wonder what happens when a fire starts at an acetylene bottler? oh great now I'm going to spend all day watching modern marvels
|
|
#
?
Dec 7, 2011 22:00
|
|
|
trouser chili posted:More valve failure fun! 97 is a heat wave in St. Louis? That's fine summer weather down here in South Texas. The whole state must be burning up in acetylene fires.
|
|
#
?
Dec 7, 2011 22:53
|
|
|
Phanatic posted:This, children, is why you don't replace your 230psi relief valve and 400psi rupture disk with pipe plugs: I've never handled nitrogen, or even had a chemistry class (and my last physics class was in loving middle school) - but doesn't nitrogen boil at room temp and thus require a functioning relief/vent? How long would it take for a filled dewar to rupture in such a spectacular fashion? dor1 posted:Even if a bottle of acetylene is consumed by fire and doesn't explode (not heated for long enough) it's still dangerous, even if the bottle has been cooled down. From what little I understand about acetylene, even a good whack can piss off a container, right? How the gently caress do you (safely) vent them after a fire? randomidiot fucked around with this message at 05:22 on Dec 8, 2011 |
|
#
?
Dec 8, 2011 05:20
|
|
|
some texas redneck posted:I've never handled nitrogen, or even had a chemistry class (and my last physics class was in loving middle school) - but doesn't nitrogen boil at room temp and thus require a functioning relief/vent? If the nitrogen is compressed it shouldn't boil much at all, if I'm thinking right.
|
|
#
?
Dec 8, 2011 05:29
|
|
|
some texas redneck posted:I've never handled nitrogen, or even had a chemistry class (and my last physics class was in loving middle school) - but doesn't nitrogen boil at room temp and thus require a functioning relief/vent? some texas redneck posted:How long would it take for a filled dewar to rupture in such a spectacular fashion? some texas redneck posted:From what little I understand about acetylene, even a good whack can piss off a container, right? if you store acetylene compressed, yes, mean mugging a cylinder can make it go off. It's generally stored dissolved under pressure in acetone to avoid this, since dissolving it in acetone somehow makes it a good bit less... excitable. I don't really understand why too well. Acetylene has a triple C-C bond in the middle, which means it's just itching to fly apart and find other things to connect to, like oxygen. That's one of the reasons it burns so drat hot, a C-C triple bond has quite a bit of energy stored in it. kastein fucked around with this message at 05:51 on Dec 8, 2011 |
|
#
?
Dec 8, 2011 05:48
|
|
|
jamal posted:oh great now I'm going to spend all day watching modern marvels uuuugh I had no idea these were on youtube. Good bye rest of my week.
|
|
#
?
Dec 8, 2011 06:52
|
|
|
Paul Boz_ posted:uuuugh I had no idea these were on youtube. Good bye rest of my week. Agreed. I'm already watching my 3rd episode now.
|
|
#
?
Dec 8, 2011 07:34
|
|
|
kastein posted:
 I did not know that, holy poo poo.
|
|
#
?
Dec 8, 2011 09:14
|
|
|
Reading about that FJ again he didn't even get to start it he just went to roll the power windows down before starting it. Switch contact made a spark and BOOM I guess.
|
|
#
?
Dec 8, 2011 12:46
|
|
|
Cakefool posted:
Don't get too exited and read the second part of what he posted. You will likely never, ever, ever come across a cylinder of compressed acetylene unless you work in a gas mixing or production facility. Everything the average person or business can buy is dissolved in acetone to stabilize it. There is a facility near me that has some of this poo poo, and the storage and transportation is pretty over the top.
|
|
#
?
Dec 8, 2011 14:30
|
|
|
Cakefool posted:
don't worry, Motronic is right. No one is dumb enough to store it compressed, everyone stores it dissolved because huge, city leveling firey explosions are bad for business. Acetylene is reportedly even explosive at atmospheric pressure if mechanically shocked. It's very touchy stuff and really not to be hosed with unless you are using the appropriate tools.
|
|
#
?
Dec 8, 2011 16:23
|
|
|
Gaseous acetylene won't go boom on its own unless it's under pressure, but in liquid or solid states it can indeed explode even at 1atm if you piss it off. From Ignition!, I think this is the grand-daddy bull-moose of all cylinder failures: quote:Chlorine trifluoride, ClF3, or "CTF" as the engineers insist on calling it, is a colorless gas, a greenish liquid, or a white solid. It boils at 12° (so that a trivial pressure will keep it liquid at room temperature) and freezes at a convenient --76°. It also has a nice fat density, about 1.81 at room temperature. It is also quite probably the most vigorous fluorinating agent in existence-- much more vigorous than fluorine itself. Gaseous fluorine, of course, is much more dilute than the liquid ClF3, and liquid fluorine is so cold that its activity is very much reduced. All this sounds fairly academic and innocuous, but when it is translated into the problem of handling the stuff, the results are horrendous. It is, of course, extremely toxic, but that's the least of the problem. It is hypergolic with every known fuel, and so rapidly hypergolic that no ignition delay has ever been measured. It is also hypergolic with such things as cloth, wood, and test engineers, not to mention asbestos, sand, and water --with which it reacts explosively. It can be kept in some of the ordinary structural metals -- steel, copper, aluminum, etc. --because of the formation of a thin film of insoluble metal fluoride which protects the bulk of the metal, just as the invisible coat of oxide on aluminum keeps it from burning up in the atmosphere. If, however, this coat is melted or scrubbed off, and has no chance to reform, the operator is confronted with the problem of coping with a metal-fluorine fire. For dealing with this situation, I have always recommended a good pair of running shoes. And even if you don't have a fire, the results can be devastating enough when chlorine trifluoride gets loose, as the General Chemical Co. discovered when they had a big spill. Their salesmen were awfully coy about discussing the matter, and it wasn't until I threatened to buy my RFNA from Du Pont that one of them would come across with the details. Phanatic fucked around with this message at 16:43 on Dec 8, 2011 |
|
#
?
Dec 8, 2011 16:41
|
|
|
http://pipeline.corante.com/archives/things_i_wont_work_with/ That whole category is fun reading.
|
|
#
?
Dec 8, 2011 17:02
|
|
|
Phanatic posted:Gaseous acetylene won't go boom on its own unless it's under pressure, but in liquid or solid states it can indeed explode even at 1atm if you piss it off. How was nobody killed when one guy had a heart attack at Mach 2?
|
|
#
?
Dec 9, 2011 03:03
|
|
|
|
| # ? Apr 24, 2024 00:38 |
|
|
Oxy-acetylene can be loving scary. On top of the leaking and blanketing an area, the hilarious level of power in acetylene it just gets scarier with regulator blowout. Crack open the oxygen tank main valve quickly with the adjustment screws in working position and all that high pressure oxygen slams into the valve with a tiny little bit of steel shavings or oil and the whole valve can explode. High pressure oxygen rushes into the valve, heat of recompression heats up a contaminant inside the valve and ignites, regulator turns into a ball of flame. https://www.youtube.com/watch?v=NwFRYlJQ6RQ I've yelled at a lot of people at work for just grabbing the torch and going out to cut something. If you actually use the correct procedure it's not remotely frightening, but watching people just walk up, grab the torch and popping open the valves is.. dumb.
|
|
#
?
Dec 9, 2011 03:24
|
|
