General > General Technical Chat

heres a gas pressure vessel can i get some advice.

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Capernicus:

--- Quote from: bdunham7 on March 10, 2022, 05:40:40 am ---
--- Quote from: Capernicus on March 09, 2022, 05:26:12 pm ---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.

--- End quote ---

Simply contaminating the threads of an oxygen valve or regulator can do it.   A 4 liter bottle at 2000psi would be more than enough to splatter your brains on the ceiling.

--- End quote ---


I AM LISTENING.   I'm going to call it off for more research time on all the pit falls, especially for oxygen, for sure.   

I need to do this tho, or I'm basicly getting nowhere.
a 4liter bottle at only 100psi has got to be safe tho?   Even that "drinks dispenser" goes up to that much on the dial, even tho I know its only co2 that goes into that thing.

Capernicus:
I could actually drop the volume to 200ml.

because I just have to support the mould + a little condenser volume next to to it for the water to evaporate/wick out to.

So it could be less than 4litres easily,  so maybe I should do that.

Once the rock has all the water removed from it,  it should be hardened by then.    u slow down the evaporation to get it to the time duration you want.


The amount of air im compressing in for that. (and only getting the oxygen not the nitrogen) would only occupy a half metre cube of ordinary air,   so if i keep the volume down its probably nowhere near as dangerous.

LaserSteve:
100 psi from a fractured pressure vessel can inflate your arm like a balloon.  Didnt get to see that one but heard about it from the inflatee.

Our.stainless  Sol-gel reaction vessel at work has at least 25 mm walls, volume of say 10 L, weights around 350 pounds, has a hydraulic jack to lift its lid, copper seals, and 12 grade eight bolts to hold the lid on.
Manual calls for a torque wrench to a specific torque or safety ratings are void.

The pump can deliver up to 5000 psi Co2 on that system.

No rubber or plastics  anywhere in the system.  Lots of warnings in the manual about purging the gas fill to avoid various problems including autocatalytic reactions.

 Something else to think about, if your supersolvent will dissolve a ceramic precursor, what will it do to a rubber seal?



Steve

Capernicus:

--- Quote from: LaserSteve on March 10, 2022, 06:52:58 am ---100 psi from a fractured pressure vessel can inflate your arm like a balloon.  Didnt get to see that one but heard about it from the inflatee.

Our.stainless  Sol-gel reaction vessel at work has at least 25 mm walls, volume of say 10 L, weights around 350 pounds, has a hydraulic jack to lift its lid, copper seals, and 12 grade eight bolts to hold the lid on.
Manual calls for a torque wrench to a specific torque or safety ratings are void.

The pump can deliver up to 5000 psi Co2 on that system.

No rubber or plastics  anywhere in the system.  Lots of warnings in the manual about purging the gas fill to avoid various problems including autocatalytic reactions.

 Something else to think about, if your supersolvent will dissolve a ceramic precursor, what will it do to a rubber seal?



Steve

--- End quote ---

If I keep my system to 200ml, at 2000psi,  its ~50 times less force than your system has to take at 10litres.  (PxV) maybe doing things low volume is alot less catastrophic.

the "Super solvent" which I don't know is going to work,  is just pressurized oxygen inside the ceramic mud slurry inside the mould cavity, which is to be pressurized. (which is kept 2 degrees, for more gas dissolution.)   Since Ive just worked out from what you guys said to me,  that oxygen is alot more dangerous than co2, maybe the base it makes is also more concentrated at an equal pressure,  co2 only makes a dibasic acid,  oxygen might not be as diluted when mixed with water.

Plastic is safe from acid and bases no matter how concentrated they are - thats what I thought.    Its rocks + metal that get affected by acid+base, not plastic+rubber?


So do you know alot about oxides?  Sol-Gel I never heard of that before...     I just want to make ordinary magnesium oxide,    Now Im starting to think with 2000 psi, maybe it literally just squishes the water out of it,  and it only takes 30 seconds, and I was thinking I need to leave it in there for a month under pressure.

And I dont know.  I should definitely do it low pressure first, to see what happens.   Then increasing the pressure may have an effect that it literally dries it by squeezing the water out of it mechanically!!!

Capernicus:
What if I dig a big hole and operate it under the ground?  That might be safer.  :)

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