General > General Technical Chat
heres a gas pressure vessel can i get some advice.
TimFox:
https://www.fire.tc.faa.gov/pdf/05-14.pdf
See pp 18ff for data on common plastic bottle materials.
Do you have Google?
LaserSteve:
When I was learning glassblowing as a high school junior I learned not to wear sweaters with the torch running. Even with balanced combustion going on, enough gas combustion products and unburned oxygen would build up in the cable knit sleeve that I could smack my arm with my hand, and the gas would travel to the torch and ignite with a whump. That was an eye opening experience.
Please see attached pictures of a car with a compressed gas expansion incident.. First the released gas expanded the car. Then it exploded AFTER an ignition source was found.
Find some one experienced with Sol-Gel chemistry and have a chat with them. Ask them to show you a real certified and proof tested pressure vessel. It looks nothing like what you have pictured.
Google ASTM pressure vessel and read what you find.
Hydrothermal crystal growth does not need the satursted o2, either. But it does need a proper pressure vessel that weights tonnes and operates in an armored containment facility, by remote control.
Please don't try what you propose.
Note, I deleted the politically incorrect "Man from Lox" from my post. Sadly it is a wartime video, and probably inappropriate for EEVblog. The demos in-between the sexist portions are very good, and show what unconfined oxygen at low pressure can do.
Steve.
SmallCog:
The pressure vessel you linked has a table with a column labelled bar.
Presuming this is it's maximum, the value of 8 equates to 116psi
Given that the vessel has a flat top and bottom I'm surprised it's even this high, the more pressure a vessel is designed to take the less chance you'll see a flat surface.
I'm not sure which state you're in but what you propose may require registration given the pressures and substances. A basic guide can be found here: https://abvinspections.com.au/wp-content/uploads/2019/05/Guide-to-Pressure-Vessel-Item-Registration.pdf
I've been through the pain of registering a pressure vessel that was purchased and imported into Australia without any consideration given to registration. Its not something I'd ever willingly tackle again!
Capernicus:
--- Quote from: SmallCog on March 10, 2022, 04:50:27 am ---The pressure vessel you linked has a table with a column labelled bar.
Presuming this is it's maximum, the value of 8 equates to 116psi
--- End quote ---
Thanks for spotting - I bet it can take way more than 100psi, that's a very careful max for a steel container, a pepsi bottle can take 100psi.
With the oxygen, thanks for all the advice, Ill definitely do some more research before I go for 2000psi. (100psi should be safe tho. even for oxygen.)
So I best be careful when I do this. I'm not even sure its going to work, I pretty much know it works for Co2, so I'm just generalizing the idea to oxygen.
bdunham7:
--- 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.
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