Why Steel hold More Gas than AL

[Jason McK]

Thanks everyone. So I guess Steel tanks do not defy the laws of Physics
Great info
J

 

[Firediver]

5000psi is usally when the burst disc goes.. an al can be filled to 500psi.. just I wouldn't want to be the one filling nor the one using..... you never know when it will go Kaboom Also have to think what pressure tanks are hydroed at.....

 

[MikeFerrara]

There are composit tanks rated for very high presure (6000?) but I haven't used any.

 

[teknitroxdiver]

'They' say that an instructor once filled an AL80 to 11,000 psi with a Haskel.....if you had the nerve to dive it, that would be equivilant to 284 cf, or 3 2/3 'normally' filled 80s.

 

[aquaoren]

In Europe LP tanks are 232 BAR and HP tanks are 300 BAR (Roughly 4500 PSI)

 

[TeddyDiver]

Maybe in Europe? I know I've heard of higher than our 3443/230 BAR stuff.

Either 5000 PSI or 4500 PSI/300 BAR

Makes you wonder what those cave divers pump them up to!

In any case for a discussion that seemed more geared towards tank capacity physics I didn't want to dig a deeper hole.

Pete

In Europe tanks are rated 200bar/230bar and 300bar. 200bar tanks are steels and al's with either DIN/lp or yoke valves. The filling pressure is max 230bar due the compressor safety valve setting. 300bar steels (with DIN/hp valve) are filled accordingly to 330bar. After cooling down the actual pressure comes down around 10% (from 230 to~210 and 330 to~300).
200bar ~3000psi
300bar ~4500psi
Gas mixes are made only in 200bar tanks (cave divers!).
1psi=0,06895bar
Tank sizes are in litres at 1 bar (8,10,12,15 :most common ones)

 

[kidspot]

'They' say that an instructor once filled an AL80 to 11,000 psi with a Haskel.....if you had the nerve to dive it, that would be equivilant to 284 cf, or 3 2/3 'normally' filled 80s.

What do "they" say happened to said instructor??? Since he only did it once...

 

[markfm]

I would somehow think of a very unhappy first stage, getting whapped with 11000 PSI...

(it might have made the tank-shooting evolution more fun, though

 

[teknitroxdiver]

What do "they" say happened to said instructor??? Since he only did it once...

Apparently he was not injured. The tank was later destroyed, by a means unknown to me.

 

[SDAnderson]

What do "they" say happened to said instructor??? Since he only did it once...

Maybe he sleeps with the fishies...