heres a gas pressure vessel can i get some advice.

[Capernicus]

https://www.ebay.com.au/itm/294264768696?chn=ps&_ul=AU&norover=1&mkevt=1&mkrid=705-139619-5960-0&mkcid=2&itemid=294264768696&targetid=309727335774&device=c&mktype=pla&googleloc=9070552&poi=&campaignid=1669056926&mkgroupid=67513082834&rlsatarget=pla-309727335774&abcId=1123846&merchantid=119156995&gclid=CjwKCAiAvaGRBhBlEiwAiY-yMDpoKYB-EGJQgDzgFYp5-_z-s1RTHSYFSjfLYNfHlYc7dxvjyYn-WxoCZuIQAvD_BwE

So this pressure vessel looks ok.   but I'm not sure what I'm doing,  I'm not sure how much pressure this thing can take.
Maybe if It comes with a psi-dial I guess keep below the max on it.

I'm planning on putting pure oxygen in it, (Using electrolysis and a high psi low volume pump to get it in, into a rated diode.) Only slowly over time, using baking soda as the electrolyte, and out-piping the hydrogen cause I don't need it, I figure lightning will hit it and it'll turn back into water again.  good old nature.

Im going to convert it into a multi-compartment system, with cement and plastic bottles (because it could possibly have a strong base in it -according to a theory- that could react to the metal,  so I figure plastic and cement to fill up the gaps inside gets over the problem.)
Thats if my theory is correct anyway about dissolving oxygen at high pressure with water creates a strong base, whilst the oxygen in inside it, and kept at icy cold temperature. (look up Henry's law.)  Its a diacidic base.   at 2000 psi i think it only counts as 90% diluted only, so the material will probably be hydrous only, not anhydrous,  and I probably wont even reach that pressure, depends on what its all rated at when it gets to me.

Its because I want to put magnesium oxide in solution, to cement it together from powder.  (Ceramic-ware)
I want to make things like ceramic scissors and other apparatus, maybe even cooking ware,  but that will only work if it doesnt come out too hydroxidey, or when heat hits it, it might break apart in powder, when it loses its water bonds.   If its not affected by the water too much, itll take more thermal torture before it breaks, like concrete kilns do.  But maybe thats a bit too much to ask, and its not thermal ceramic.

Instead of using acid, I put it with high pressurized gas and water instead, but its a similar thing.   it puts the rock in a softer state so it melds together.  Its like scintering, except I do it at 2 degrees instead of 500 degrees, because the gas pressure should push it together, so the base acts on it, it goes soft, then it gets 1000 psi of pressure (or whatever I manage to get.) compacting it together pneumaticly.

I need it multicompartment, because i need the water to travel out of the "mud slurry" in the mould, and drip into a condenser, I plan on doing it with vibration evapouration.

Ill probably just put in the refridgerator (cold gets the gas more dissolved for the same pressure, squared just about, cause of thermo-dynamics), if I can make some space for it, and just sit it in there and see if the mag-o crystalizes, with the oxygen bombarding it.


So, any one have any advice?  Or am I completely insane.

[TimFox]

In chemistry labs, such vessels are often called "bombs", which is a hint about safety.  This one looks something like an old-fashioned kitchen "pressure cooker", which usually hold about 2 atmospheres pressure, nowhere near 1000 psig.
Of course, the vendor doesn't specify the pressure and the gauge is illegible.  What kind of seal (gasket, whatever) is below the top?
Even the kitchen units occasionally explode, so I will not give practical advice on this unit.

[Capernicus]

Thanks.

I can actually make one myself out of cement.  I wonder how thick it needs to be, and how much steel reinforcement bars help.

So I need a rubber gasket for it!  - then maybe I can strap it down with some 1 tonne buckle straps.

[bill_c]

Please don't do this! 
You can rent oxygen tanks at welding supply places.  These tanks are heavy forged steel.
Oxygen service has special requirements. Just about anything in contact with the oxygen is seen as fuel.  Things like excessive velocity, oil contamination, and plastic, can set it off.  Do way more research before attempting such, even with approved tanks, piping, and controls.
Also, cement (or concrete) does not have any tensile strength, so it is not suitable for any pressure tank.

[Capernicus]

I bet cement can take some pressure,  its thick rock,   But If I just use it as filler for inside a pressure capsule I buy, it only needs compressive strength to be ok. (because its sandwiched between the inner membrane (plastic bottle) and the wall.

So... with the oxygen, yeh I dont know what I'm doing at all.

I heard u can actually light a cigarette on contact to liquid oxygen,  but I need something powerful otherwise the mineral isnt going to "glue".  What I think im getting (which is a pretty loose theory) is something like liquid oxygen but at 90% dilution of that.

Is that still dangerous?  And will plastic linings still work?  I'm not sure, but plastic is unaffected by pure sodium hydroxide, so I think it should be ok to handle compressed oxygen and water vapour mix.

Yep.  more research is in order.

And I may just do a little 100 psi version with just pepsi bottles in the refridgerator ... before I go hardcore straight away.

[IanB]

1. Do not mess with gases under pressure
2. Do not mess with pure oxygen
3. Do not, repeat do not, mess with pure oxygen under pressure

I'm not kidding here. Maybe you will manage to avoid harm or injury, but maybe you won't. It's not worth the risk.

[rstofer]

The dispenser tank in the OP has a pressure relief valve - don't defeat it.

If you scroll through the images, you will find one of the open tank.  You can see that the walls are quite thin.

[Capernicus]

3. Do not, repeat do not, mess with pure oxygen under pressure

So... how dangerous is it really- is it as good as compressed hydrogen?
Thats pretty bad.   Have a compressed hydrogen explosion could be quite the spectacle.

I always thought oxygen doesnt actually ignite by itself?

[TimFox]

If you have to ask "How dangerous is it really?", then you need to do some thorough research at the library before further consideration.
If you think you can rely on the compressive strength of cement between flimsy walls, with amateur-produced concrete, you should realize that serious construction projects reinforce the concrete with rebar.

[Capernicus]

I just did a rebudgetting, and because my system volume is only 4 litres,  To pull in 2000-psi's worth of oxygen is only 2metres^3.  but because the air is only 25% oxygen, its 2x4x4 metres takeup in natural air at 14 atm,  so thats not that much.
When I let off the release valve, it wont take very much to expand back to normal pressure.

if i keep the volume down (to say tops 4litres and its only little system) I can get the psi up and its not as dangerous.

If I released it out slowly when deflating the system, I bet its perfectly safe,  just don't make an oxygen jet and it'll be perfectly fine.

[IanB]

I bet its perfectly safe

Do you want to bet your life on that? Even if you don't get killed, you probably value your eyes, ears and limbs, right?

[TimFox]

Again, why do you think 1000 psig in this container is not dangerous?

[IanB]

if i keep the volume down (to say tops 4litres and its only little system) I can get the psi up and its not as dangerous.

So a little bomb is not as dangerous as a big bomb? Yes? But is a little bomb something you want to be around?

[BrokenYugo]

You aren't playing with fire here, you're playing with what makes fire work, in a highly concentrated form.

Such shenanigans tend to result in closed casket funerals.

[HighVoltage]

To me it sounds like you do not know what you are doing and you have no feeling for the level of danger you are getting yourself into.

There is a reason why compressors and bottles with compressed gases have to be inspected on a regular basis.

 

[Capernicus]

Its only 4-litres, so if u expand it to be at the natural dilution of air, its only 2x4x4 metres cubed.

I think ill be fine.     So whats the danger here, its completely isolated from its environment, and if I need to discharge it, I just do it slowly over time and theres no chance for explosion at all.

If it has a safety valve on it, there's no way I can overfill it, and if I do, Im also only filling it slowly so that should be safe too.

[KaneTW]

If you want to commit suicide, please don't involve us.

[Monkeh]

This is the sort of thing you're playing with. Please stop.

[Capernicus]

acetalyne may as well be petrol, oxygen is different, as long as u don't enrichen the air too much then there's no chance for any fire hazard.

The gas going to everyone's home right now for cooking is more dangerous than it,  if I be careful it should be ok.
Should just put some engineering hairs on my chest.   I cant wait to do it.

 * no leaks.
 * charge and discharge slowly to not enrichen the air.
 * make sure the whole thing is acid and base proof.
 * always fill it up at a higher temperature than I use it at.
 
theres no way to make a strong material without having to go through some danger.   So this is perfect, its not too bad, because magnesium oxide is very water soluable, (0.009 grams for 100millitres of water, quite high for an oxide!) so the base should affect it very well.

[Monkeh]

You're talking about putting 1000psi into a thin-walled steel cylinder. It may as well be acetylene if that ruptures.




I can't tell if you're a troll or just this dumb..

[MK14]

Or am I completely insane.

I'm saying, nothing.

[Capernicus]

So what could cause it to rupture and explode?

is there a vid of a 4litre bottle at 2000psi going off,  I wonder how big the explosion would be.

[MK14]

So what could cause it to rupture and explode?

is there a vid of a 4litre bottle at 2000psi going off,  I wonder how big the explosion would be.

No, I could only find videos of a 3.99999 litre bottle at 2000.00001 psi and another video, with 4.00000000000001 litres, exploding at 1999.999999 psi, so it must be safe ?

End of sarcasm.

No, It doesn't sound safe at all.

[nali]

Warning: This is a little bit gruesome!

Someone playing with an O2 cylinder learned the hard way. Please don't.

O2 CYLINDER EXPLODES WHILE BEING REPAIRED (STILL PHOTOS)

[nctnico]

https://www.ebay.com.au/itm/294264768696?chn=ps&_ul=AU&norover=1&mkevt=1&mkrid=705-139619-5960-0&mkcid=2&itemid=294264768696&targetid=309727335774&device=c&mktype=pla&googleloc=9070552&poi=&campaignid=1669056926&mkgroupid=67513082834&rlsatarget=pla-309727335774&abcId=1123846&merchantid=119156995&gclid=CjwKCAiAvaGRBhBlEiwAiY-yMDpoKYB-EGJQgDzgFYp5-_z-s1RTHSYFSjfLYNfHlYc7dxvjyYn-WxoCZuIQAvD_BwE

So this pressure vessel looks ok.   but I'm not sure what I'm doing,  I'm not sure how much pressure this thing can take.

This is not a pressure vessel; this is a container used to dispense liquids (like Coca-Cola) which are forced out by a compressed gas at pressures of a few bar (<4) at most.

Like others already wrote: your project sounds like a complicated way to kill yourself.