Is there a good scuba cylinder data chart anywhere?

[Sanlanman]

Thanks guys, lots of good info. I am considering buying a pair of E7- 100CF steel tanks next year. Right size, right pressure, and capacity and still negatively bouyant at the end of the dive.

 

[The Kraken]

Just buy a couple of HP 100's and have at it !!!

Safe dives . . . . . . .
. . . safer ascents !!!

the K

 

[pescador775]

Faber produced a "3180 +" cylinder. I never heard of a comparable PST tank.

Thirty years ago, PST sold a "3000 +" tank. Also, more recently, a 3300 tank. That was the short 72 cf bottle similar to the Scubapro tank made by Faber.

There might be a couple typos in the spreadsheet.

 

[sclakediver]

Those E7-100's are sweet tanks, especially compared to the AL80.

 

[SparticleBrane]

I would really consider revising your cylinder chart. It has MANY errors.

Actually the sheet is correct - that references a HP80 that PST has produced at some point. The sheet also includes PSTs E7 series 'mid pressure' cylinders (3180 + 10% overfill).

If you want to look at the PST LP80 then look up "PST LP-80" in the drop down.

That's exactly what I did, and got exactly the same answer as your provided below -- 32.75 cf/100psi. Note that this also incorrect. :mooner:

Also, please note that PST has never made cylinders rated to 3180 + 10%. They have made HP cylinders rated directly to 3,500psi, and the later E-series cylinders are rated for 3,442psi. Nothing, however, to 3180 + 10%.

In reference to the PST LP-80, the ft3 per 100psi is 32.75434, with a ft3 volume of 80.6 filled to 2640psi.

Ok so you just contradicted yourself.

Let's go over some basic math:

A PST LP-80 holds 80cf at 2,640psi. To get cf/100psi, that's 80cf / (2640/100) = 3.03cf / 100psi. If anyone cares, 3 is the tank factor for a single LP80.


If an LP80 held 32.75cf/100psi as you originally said, it would actually hold 864.6cf at rated pressure.


You are confusing "psi/cf" and "cf/psi"...

 

[DPDiver]

I unlocked the chart, checked the references, and verified the calculation in question. The number is correct IF the heading is reversed. The last column should say " PSI per cu. ft."