General > General Technical Chat
heres a gas pressure vessel can i get some advice.
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Capernicus:
whatever you do,  dont buy an oxytorch.
Monkeh:

--- Quote from: Capernicus on March 09, 2022, 05:38:57 pm ---whatever you do,  dont buy an oxytorch.

--- End quote ---

I've used them quite safely, because I understand how flammable gasses and accelerants behave.

FYI, the E size cylinder in the video posted a few minutes ago is 5l internal volume. And probably exploded like that simply by the effort of attempting to unscrew the valve.
IanB:

--- Quote from: Capernicus on March 09, 2022, 01:53:36 pm ---I'm not sure what I'm doing
--- End quote ---


--- Quote from: Capernicus on March 09, 2022, 03:01:33 pm ---I dont know what I'm doing at all.
--- End quote ---


--- Quote from: Capernicus on March 09, 2022, 03:56:12 pm ---So... how dangerous is it really
--- End quote ---


--- Quote from: Capernicus on March 09, 2022, 04:17:06 pm ---I bet its perfectly safe
--- End quote ---


--- Quote from: Capernicus on March 09, 2022, 04:39:48 pm ---I think ill be fine.
--- End quote ---


--- Quote from: Capernicus on March 09, 2022, 05:09:15 pm ---I be careful it should be ok.
--- End quote ---


--- Quote from: Capernicus on March 09, 2022, 05:26:12 pm ---I wonder how big the explosion would be.
--- End quote ---
Monkeh:

--- Quote from: IanB on March 09, 2022, 05:44:02 pm ---
--- Quote from: Capernicus on March 09, 2022, 01:53:36 pm ---I'm not sure what I'm doing
--- End quote ---


--- Quote from: Capernicus on March 09, 2022, 03:01:33 pm ---I dont know what I'm doing at all.
--- End quote ---


--- Quote from: Capernicus on March 09, 2022, 03:56:12 pm ---So... how dangerous is it really
--- End quote ---


--- Quote from: Capernicus on March 09, 2022, 04:17:06 pm ---I bet its perfectly safe
--- End quote ---


--- Quote from: Capernicus on March 09, 2022, 04:39:48 pm ---I think ill be fine.
--- End quote ---


--- Quote from: Capernicus on March 09, 2022, 05:09:15 pm ---I be careful it should be ok.
--- End quote ---


--- Quote from: Capernicus on March 09, 2022, 05:26:12 pm ---I wonder how big the explosion would be.
--- End quote ---

--- End quote ---

Dunning-Kruger in action.
jmelson:
Pure oxygen is extremely dangerous.  There have been fatal explosions where commerical oxygen bottles have caught fire and exploded due to minute amounts of oils or even fingerprints on internal parts.  There was a recall of medical oxygen bottles which came with brass regulators where the wrong grade of brass was used.  Almost all materials are combustible in even standard atmospheric pressure pure oxygen.  The US Air Force did a test back in the 1950's to see if airmen would be harmed by breathing pure oxygen.  Somebody changed a burned-out light bulb, the spark when the new bulb made contact ignited the light socket, the ceramic socket then ignited, an asbestos fire blanket then ignited, and the opened the door and barely escaped.  Check out the Apollo 1 fire in 1967 that killed 3 astronauts.  Slightly above normal atmospheric pressure, pure oxygen.  The whole Apollo capsule was incinerated.  Also, check out the Egypt Air flight 667 fire in a Boeing 777 at the Cairo, Egypt airport.  A wire sparked to the crew oxygen line, and burned the cockpit to a complete cinder.  If that happened in the air, it would ahve been a catastrophe, but they were still parked at the gate.
Jon
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