Perfect Set of Tanks Poll

[tbone1004]

@EireDiver606

so in the US we have steel tanks rated at 2640psi/182bar or 3442psi/232. There are some other oddballs, but those are the two available today.
We refer to a "cave fill" as a fill to 3600psi and is a practice that started and continues in cave country in Florida.
There are no 300bar tanks steel tanks in this country.

my comment stemmed from the fact that unless there is a ballast problem *higher pressure tanks are usually more negative which is why I use LP cylinders when cave diving*, or a cost problem, there really isn't any reason not to buy "higher pressure" tanks even if you are always getting short fills

i.e. if the 300bar 15L is say 2kg negative when empty, and the 232bar is 1kg negative when empty, and you always wore more than 2kg of lead then there is no reason to get the 232bar unless it is cost driven

my opinion, others may disagree. In the US, the 2640psi LP cylinders really useless unless you can reliably get "cave fills" in them to 3600psi.

 

[Billy Northrup]

slightly off topic, but what would an HP cave fill look like?

 

[Reku]

I like lp85s - singled or doubles or sidemount
I like al40s and 80s for deco
I like small steels/al40s for rebreathers

I just never really cared for large hp tanks, never really had a use for them.

 

[tbone1004]

slightly off topic, but what would an HP cave fill look like?

3600psi, same as LP the regulators on the fill stations are pretty much just set to 3800 and they typically cool to 3600. Easily divisible by 3, under the 4000psi hydro pressure of LP tanks, but only slightly above the HP tanks fill pressure

 

[Joebar]

As Tbone said, the 300b tank is heavier than a 232b tank. Here's an example:

http://www.dirzone.com/catalog.php?lang=en

They don't sell 15L 300b. Probably there is no market.
The 12l 300b tank weights 17.4kg and the 232b Tank 14kg. In the water that's about 3kg difference. Do you pay 60€ for 3kg weight which you cannot place where you like it?
Handling on land you have always to move 3.4kg more.
So I still say if you don't have easy access to 300b stay with 232b

 

[EireDiver606]

@EireDiver606

so in the US we have steel tanks rated at 2640psi/182bar or 3442psi/232. There are some other oddballs, but those are the two available today.
We refer to a "cave fill" as a fill to 3600psi and is a practice that started and continues in cave country in Florida.
There are no 300bar tanks steel tanks in this country.

my comment stemmed from the fact that unless there is a ballast problem *higher pressure tanks are usually more negative which is why I use LP cylinders when cave diving*, or a cost problem, there really isn't any reason not to buy "higher pressure" tanks even if you are always getting short fills

i.e. if the 300bar 15L is say 2kg negative when empty, and the 232bar is 1kg negative when empty, and you always wore more than 2kg of lead then there is no reason to get the 232bar unless it is cost driven

my opinion, others may disagree. In the US, the 2640psi LP cylinders really useless unless you can reliably get "cave fills" in them to 3600psi.

That helped a lot. I find it weird that you guys use 182 bar...

 

[Bierstadt]

That helped a lot. I find it weird that you guys use 182 bar...

I also find it weird we use 182 bar.

 

[bamafan]

That helped a lot. I find it weird that you guys use 182 bar...

In the US we normally don't quote tank fill pressure in bar. Our tanks are marked in PSI. I don't know where the standard fill pressure of steel tanks came from. We have 2250, 2400 + 10% overfill, 3442 and 3500.

 

[211ratsbud]

In the US we normally don't quote tank fill pressure in bar. Our tanks are marked in PSI. I don't know where the standard fill pressure of steel tanks came from. We have 2250, 2400 + 10% overfill, 3442 and 3500.

Weren't there 2250 With + rating? Also 3180 + really odd in the mix.

 

[tbone1004]

Weren't there 2250 With + rating? Also 3180 + really odd in the mix.

the 2250's and 2400's are built to the 3aa standard so are eligible for the + rating.