Perfect Set of Tanks Poll

[211ratsbud]

If I ever make it to cave country.... If a cave fill for an LP tank often goes to 3600 PSI where might they go to for HP tanks?

Where does a first stage (DIN, eg. Apex DS4) start "complaining"?

A hp tank is already a cave fill lol.

I've heard much above 4500, pressure vs volume starts to become relatively non linear. Id be curious to hear some insight or correction to that.

 

[elmo]

A hp tank is already a cave fill lol.

I've heard much above 4500, pressure vs volume starts to become relatively non linear. Id be curious to hear some insight or correction to that.

You might be interested in this piece, discussing just that. In case you're not familiar with metric units, 200 bar is 2900 psi (and 300 bar is 4350 psi)
When real gas corrections matter – The Theoretical Diver
And according to Air Compressibility Factor Table - EnggCyclopedia, the compressibility factor at 4500 psi (just over 300 bar) is about 1.21 (i.e. assuming an ideal gas would be out by 21%) at normal temperatures

 

[elmo]

You might be interested in this piece, discussing just that. In case you're not familiar with metric units, 200 bar is 2900 psi (and 300 bar is 4350 psi)
When real gas corrections matter – The Theoretical Diver
And according to Air Compressibility Factor Table - EnggCyclopedia, the compressibility factor at 4500 psi (just over 300 bar) is about 1.21 (i.e. assuming an ideal gas would be out by 21%) at normal temperatures

Oops, read the wrong column. The air compressibility factor at 4500 psi would be about 1.11 (assuming an ideal gas you'd be out by 11%)

 

[bamafan]

If I ever make it to cave country.... If a cave fill for an LP tank often goes to 3600 PSI where might they go to for HP tanks?

Where does a first stage (DIN, eg. Apex DS4) start "complaining"?

Still filled to 3600 - 3800

 

[tbone1004]

If I ever make it to cave country.... If a cave fill for an LP tank often goes to 3600 PSI where might they go to for HP tanks?

Where does a first stage (DIN, eg. Apex DS4) start "complaining"?

as said above, 3600 is the limit if you are at a fill station where you aren't filling. I know like 3 people that will fill to 3900 *you want to keep them in easy pressures for thirds*. The regulators are all rated for true 300bar which is about 4300psi, but I've never filled that high on the tanks here

 

[Chris H]

I like my LP85s and my LP50s most. I have 104’s too, but prefer my CCR over the 104s in nearly every case.

 

[211ratsbud]

I like my LP85s and my LP50s most. I have 104’s too, but prefer my CCR over the 104s in nearly every case.

A set of l.p. 50 and 85's is on my list to get. Euro bands and isolator for spacing too

 

[Schwob]

Euro bands

What are Euro bands?

 

[211ratsbud]

What are Euro bands?

Just the narrower spacing, we have one spacing manifold availabe to us, European has 3 . 7-8 tall 12's and reg 10l and stubby 12 &15 l bottle spacing

You can buy an isolator cross bar for about 150 shipped from the UK, maybe less, and bands aren't too bad either. It puts 5.5" diameter cylinders very close together like our 8" tanks typically double up with. Mostly a novelty feature, but I quite see the logic having the options!

 

[Schwob]

Just the narrower spacing, we have one spacing manifold availabe to us, European has 3 . 7-8 tall 12's and reg 10l and stubby 12 &15 l bottle spacing

You can buy an isolator cross bar for about 150 shipped from the UK, maybe less, and bands aren't too bad either. It puts 5.5" diameter cylinders very close together like our 8" tanks typically double up with. Mostly a novelty feature, but I quite see the logic having the options!

Thanks.