Steel tank volume question

[The Kraken]

It does what??? Come on RoatanMan, I hope this was just a shot at weird humor. If you really have 3000+ dives I hope you know better.

Roatanman is correct.
Different metals have different moduli of elasticity.
Even granite stone has a modulus of elasticity.

the K

 

[riguerin]

Here's a link to simple tank volume caclulator. The formula is also provided.

http://www.spearfishing.org/bruces_tips/java/tankv.html

 

[Lead_carrier]

Orginal question=
Why does my Steel 104 @ 2640PSI contain more than your ALU80 @ 3000 PSI?

Answer by Roatanman
Steel s-t-r-e-t-c-h-e-s more. Elasticity, you know.

Roatanman is correct.
Different metals have different moduli of elasticity.
Even granite stone has a modulus of elasticity.

the K

I realize different metals have different properties of elasticity. So does plastic and rubber.

The way I read Roatanmans answer, it says the steel tank stretches more thus allowing a larger volume of air in a tank of the same size. Is that the way it actually works? I thought it was because in of the interior volume of the tanks. Guess we're always learning new things.

 

[D1V3R]

You should have just sprung for high pressure tanks
i have a steel 80 that is about 2 feet tall, and i have a pair od 120's that are just a few inches taller than an alumminum 80

 

[CompuDude]

Orginal question=
Why does my Steel 104 @ 2640PSI contain more than your ALU80 @ 3000 PSI?

Answer by Roatanman
Steel s-t-r-e-t-c-h-e-s more. Elasticity, you know.



I realize different metals have different properties of elasticity. So does plastic and rubber.

The way I read Roatanmans answer, it says the steel tank stretches more thus allowing a larger volume of air in a tank of the same size. Is that the way it actually works? I thought it was because in of the interior volume of the tanks. Guess we're always learning new things.

No, it's about a combination of interior volume and the strength of the material (and therefore it's ability to withstand a higher pressure).

If it was all about elasticity, tanks would swell up like balloons when you filled 'em.

There is a miniscule amount of elasticity at play, but not signficant. Else your empty tanks would drop right out of your now-too-loose cam bands every time you sucked them empty.