All acetylene cylinders contain a porous honeycomb material called a monolithic mass. They also contain a solvent (acetone) which is absorbed by the porous mass. The acetylene dissolves in the acetone and holds the acetylene in a stable condition. So it doesn't explode from impacts and shocks. If you lay a acetylene bottle on it's side don't use is set it upright so everything mixes back together in a stable state.
Welder here. Rock Crawler gets it. Acetylene is so reactive that it must be dissolved in acetone and held in the honeycomb material to be stable. Acetylene is usually stored at much lower pressures, around 15 PSI in the bottle you see in this video, compared to 2200 PSI for the oxy. I think its the second most reactive gas in the universe, the first being hydrogen, unless someone wants to correct me on that? Also, true what Rock Crawler says about laying the bottle on its side. Manufacturers usually say you should have it upright for 45 minutes before attempting to use it, as the acetone can damage the regulators on your acetylene torch. I have also used an acetylene torch in extremely cold environments, (think -45C or -49F) it is too cold for the the acetylene to evaporate from the acetone and the acetone gets pulled into the torch regardless, producing a useless, dangerous, but very pretty purple flame.
The bottom head of portable pressure vessels are always super thick compared to what they need to be as they are regularly set on damp ground (causing rust), rolled or dragged (wearing away the material), dropped, and generally abused. It's pretty cheap to make them an extra 1/4" thick to make them safe.
The way bottles are manufactured actually is the reason the bottoms are so much thicker. When they punch the bottle the center doesn't stretch as much as the outer area.
The educational value of your science channel is superior to all others. Professors Edwin and Gesparit always showcase the best explosions. Thank you to Professor Mark for suppling the 20mm. Great class.
@Shain Andrews you ate so smart you know everything you are the master os the universe. Just to make it clear i learned that acetone and that pourous stuff make the acetylene stable. Just look at the comment section to learn from this vid. And I learned that a .50 cal can't pen the bottom part of a container. But I guess the master of the universe knows everything.
The best result they had was when they put them in the safe. The explosion was so big because it was tightly contained. If the guys can get a few safes, they could literally do some scientific study. Stick 10 camping propane gas bottles in a small safe and see what happens from there. A big safe: one propane and one oxygen. The combinations are endless, trying different size gas bottles, with different gases, with different safes. I could watch that for hours. Thoughts?
The stuff inside the acetylene tank is an absorbent that is soaked with acetone All acetylene tanks actually have acetone inside, which is why they say "acetylene, dissolved." The acetylene dissolves in the acetone, much like CO2 in a soda. This allows much more acetylene to be stored in the cylinder, since acetylene can spontaneously explode if pressurized above 15 psi or so. Dissolving it in acetone allows it to be pressurized to several hundred psi since it's more stable. So, it's important to only use an acetylene cylinder in the vertical position, to prevent the acetone from getting into the regulator.
Maybe some call it acetate in englisch, I don‘t know, but it definitely isn‘t acetate. Acetates are salts and esters of acetic acid. As I know there are polymeric acetic ester which can be made to fibers and used as acetone absorbents. I am a welder who needs this tanks. In Europe I habe only seen kieselgur, and in older tanks asbest (made until 1990s) as the absorbent. The solvent is most times acetone, but some contain dimethylformamide instead of acetone. So not all of them contain acetone
@@TB-wi3sq well someone knows their English to German translations But you do need to use the American H instead of the German b thingy I’m sorry I’m drunk
Never knew that and I am a master plumber... common sense always tells one to keep the tank upright. Good info. Never play with acetylene, for professional use only 😉. It could end ones day in a hurry.
Been following Mark's failure analysis of Kentucky Ballistics 50 Cal. As a Mechanical Engineer (now retired) I'm always interested in seeing these kinds of "experiments"! 😁 Also spent some years in the Medical Gas Delivery industry. People HAVE to learn how to properly handle Oxygen cylinders! I saw first-hand in HS Metal Shop back in the mid-seventies what can happen, even with an "MT" (or nearly empty cylinder)! One guy was changing out one that still had some pressure left in it. Had the safety cap off (BIG no no) and tipped it over. Fell just right to hit the valve on the lower shelf of a (thick) steel welding table! Knocked the valve off clean! That thing took off straight for the rollup door! Didn't go through but that lower panel had to be replaced! 😱
People don't think about it but there is a lot of pressure in those tanks and that pressure helps reinforce the steel walls making it seem a whole lot stronger than it normally would be.
Edwin I have an idea... Get a clear pvc tent and put the cylinders inside, close the tent up and open their valves letting the Acetylene and oxygen mix and then shoot them.... Now that will be spectacular...
Wouldn't the acetylene be at risk of spontaneous ignition? I'm no scientist but I do know it's one of the most unstable gases hence why it's dissolved in acetone.
@@Joe_Bidens_hair_fetish No it needs an ignition source. I used to fill 100 litre garbage bags with oxy acetylene and ignite it for fun. I tell you man it frikkin detonates like a bomb… once it shattered all the lights in my factory building and evacuated all the surrounding factories in the street… Even the fire brigade showed up… 😳
Dang, that's dangerous standing around those tanks with a severely compromised steel bottle. It may not have punctured it, but it seriously weakened it, and you even have an ignition source right there if it were to suddenly rupture.
Pretty sure they wouldn’t suddenly rupture. Would be possible if they were being exposed to more heat while standing next to them. But considering it’s post explosion and they’re in a desert on a windy day under thick cloud cover, the bottle would be cooling by the time they’re standing next to them.
Acetylene tanks contain a porous substrate called agmassen and are half filled with acetone. Acetylene is highly unstable when in a liquid state or as a pressurized gas. When used in a torch it is combined with oxygen to burn, however acetylene can also decompose on its own without the presence of oxygen. At pressures greater than around 30 psi it can do so explosively. If they just put actylene into the tank by itself they could only pressurize it to around 20 psi (and even then it would be highly unstable and extremely sensitive to both shock and heat) and at that pressure the tank would hold so little gas that it would be pretty much impractical to use it. The way they get around this is with the agmassen/acetone in the tank. The acetylene is actually dissolved in the acetone (a weird property of acetylene is that exceptionally large quantities of the gas can be dissolved in acetone) when it is in the tank. The agmassen comes into play because if they just used acetone by itself then if any of the acetone were to accidentally be withdrawn from the the tank, or if it got cold and the acetone shrank due to thermal expansion, it would leave a an empty space at the top of the tank and the actylene would come out of solution and fill that empty space with highly explosive pressurized acetylene gas. The agmassen acts like a really stretchy sponge (this is an oversimplification but the best way I can describe it in layman’s terms), absorbing the acetone and preventing any open gas pockets from forming as the acetone expands and contracts due to temperature changes or if any of the acetone is accidentally withdrawn from the tank (for instance if the tank were to fall over on its side while the gas is being withdrawn).
Your videos keep getting better and better, but I hope you're not setting yourself up for failure, cuz anything less is going to be boring!!! GREAT Video!!!
Every time I open RU-vid, there’s a steady escalation of violence towards oxygen tanks. And I’m loving it. I’m trying to think of a suggestion for the next installment, but we’ve already left the realms of small arms lol. Going to need a 14in naval gun next.
Your videos are always satisfying when ever I'm having s bad day Edwin I put on of your videos and it puts me in a good mood keep up the good work dude
GREAT VIDEO, LOVE YOUR CHANNEL! The interior of the Acetylene tank has a cell that holds and absorbs acetone, you can not have just only Acetylene. Acetone stabilizes Acetylene Just found your channel and and you guys are the BEST! Love the guy who keeps laughing saying Cabron, always makes me laugh Well done all of you
Acetylene tanks have crushed brick saturated in acetone which is probably still burning, I forgot a lot from welding school lol. but as a pro tip, never let your tank get completely empty! The acetone will get into the gas lines and eat the gauge and rubber hosing. Hope that helps!
So your next experiment needs to be, have an oxygen tank up against some sort of either bank or something that will keep it upright but still allowing the bottom to be exposed so you can hit the bottom of the tank to see if the tank will go into the air. A flying oxygen tank, like a missal.
Just a word of advice, I would not stand directly in front of that valve head when it's laying on the ground after it has been charged so bad. It could come off of there in a blink of an eye at high speed and rip your foot off. Safety safety safety!!!! ❤️
I'm not sure why you use acetylene, it is dissolved in acetone and takes ages to come out, so it won't mix well with the oxygen. Maybe consider using a CNG tank, would mix much better with the oxygen and hopefully be a bit more energetic
Acetylene and oxygen make, I believe, the hottest flame in the industrial world anyway. Over 6000 degrees F. It makes the cleanest sharpest cuts and super-fast starts. Great for a shop, but ridiculous at scrap yards or demo jobs. Expensive, dangerous, the tips plug up or melt out in difficult environments. Propane is about 900 degrees colder. MAPP or Propylene is somewhat hotter. Best bet is just liquid propane for fuel gas.
@Timothy Rettig the problem with acetylene is it is stored as a dissolved gas, sortof like CO2 in soft drink and doesn't come out of solution fast enough to mix quickly with the oxygen. The benefit with CNG is the high pressure it's under, and how quickly it will mix.
@@brendontait6968 This is true. The acetylene is absorbed in the acetone, just like CO2 dissolves readily in water. In fact, if you over-draw an acetylene tank beyond its ability to release the gas, you will draw acetone into the fuel stream as well. Just like a 7-UP bottle-only so much of the CO2 will come out of solution at a time.
Hey hey Edwin! Stopping in to say hello and glad to see you still thriving so well on here. I don't know how you get the nerve to do some of these videos, but I'm glad you do! Shoot your pool again with this 20mm!
Mark needs to install an 90° optic to the eye end of the scope so, it can be aimed while firing. As the gun recoils the optics will slide past the shooter's eye but gives the shooter the ability to aim while firing. Great job and demonstration.
He is a scumbag. I bought two bfg50 rifles and they were nonfunctional scratched and rattly. He refused to fix them so I sold them broken, never fired. After politely asking him to fix it he sent me one of the rudest emails I’ve ever read. Terrible customer service, repulsive human being.
Compressed air would launch a propane tank better than any scheme involving burning the propane inside. I've only ever built an air cannon capable of launching 14oz propane tanks, but the design scales amazingly well.
I used an oxy acetylene torch set for a nice cutting flame but not lit and filled a logging truck inner tube to about 10 psi. Set a roll of toilet paper soaked in solvent beside it and lit it. Went back behind my truck a few hundred feet away and shot a 22lr round through the flame into the inner tube. We where up in the mountains at a logging camp. I bet you could have heard that a good 10 miles away if not farther. It was fun to be young.
Nice video. I was just going to explain the acetylene tank when I saw Rock Crawler’s comment. Acetylene by itself can explode if pressurized beyond a certain psi (maybe 20, not sure, but it isn’t very high).
Acetylene bottles always have a sort of honeycomb in there. If that wasn't the case and you bump that stuff it might just blow up. Its essentially like nitro glycerin but as a gas.
Oxygen will make anything burn you can make a cutting torch / thermal Lance from cheap steel brake line and connect a rubber hose to an oxygen tank use a sparkler or something hot enough to ignite the tip of the brake line steel wool works great and you can cut anything just make sure to turn it off before it gets too close to the rubber hose
Find a place to shoot. Get some flares, And lighters dig them in, on a side of a hill. 22 LR. When you hit one you get a fire Ball. cost $50 per hr. or so, Have FUN!!!
In English, an anti-materiel rifle is a rifle used to engage lightly armored vehicles or enemy forces behind cover. There is no corresponding German term, such as the literal translation Anti-Ausrüstungs-Gewehr. The Bundeswehr refers to the U.S. Barrett M82, which it carries as the G82, as a "long-range rifle. The caliber of these rifles ranges from 12.7 to 20 mm. Anti-materiel rifles can be considered successors to tank rifles or tank guns. These weapons were developed during the First World War to be able to fight enemy tanks. The first such weapon was the M1918 tank rifle of the Imperial German Army in 13 mm caliber. In the interwar period, these weapons were further developed internationally, mainly to increase penetration performance. In Poland, the caliber was reduced (Model 1935 tank rifle, 7.92 mm), while in Finland it was increased (Lahti L-39, 20 mm). After the beginning of World War II, however, it quickly became clear that even the tank rifles with the highest penetrating power, such as the Soviet PTRD and PTRS, were no longer a match for the increased armor thicknesses of modern tanks. Only hits on the tracks or side armor were still successful, and the task of anti-tank engagement increasingly fell to anti-tank guns, leaving the infantry without a suitable anti-tank weapon. Toward the end of the war, at least the Wehrmacht and the U.S. Army regained infantry standoff anti-tank weapons with reactive anti-tank rifles such as the Panzerfaust or the Bazooka
