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abcitydiver
10-10-2007, 12:11
I was surfing (the web, not a body of water) and had come across a great comparrison chart of most of the standard Al & Steel tanks that showed capacity, dimensions, weight empty and boyancy full and empty. For the life of me, I cant find that site again (huge growl)
I did poke around this forum, and saw the Diverite library link, but didnt see anything like this chart.
Has anyone come across a chart like this that can provide a link to it?

Since I'll be diving with a variety of different boat opperators who will all be providing their own tanks, I thought it would be usefull to print a small chart and laminate it, then I could use it on the fly to set my weights.

Thanks!
Jane

No Misses
10-10-2007, 12:23
Try DiveRite Express.
http://www.diveriteexpress.com/gas/aluminum.shtml
http://www.diveriteexpress.com/gas/steel.shtml

* Sorry, the formatting got messed up when I pasted it here.

http://www.diveriteexpress.com/gas/img/cylinderluxferlogo.gif Luxfer Gas Cylinders at Dive Rite Express

CylinderService
Pressure
(psi)Diameter
(inches)Height*
(inches)Weight
Empty
(pounds)Buoyancy
Full : Empty
(pounds)Aluminum 6 (Inflation)30003.2111.12.5- 1.4 : - 0.9Aluminum 14 (Inflation)20154.416.55.4+ 0.7 : + 1.7Aluminum 13 (Pony)30004.3813.16.0- 1.7 : - 0.7Aluminum 19 (Pony)30004.3818.68.2- 1.4 : + 0.1Aluminum 30 (Deco)30004.8821.911.6- 1.0 : + 1.2Aluminum 40 (Deco)30005.2524.615.3- 0.7 : + 2.3Aluminum 72 (Deco/Stage)30006.8926.028.5- 1.4 : + 3.8Aluminum 80 (Stage/Primary)30007.2526.131.4- 1.4 : + 4.4* Height dimension is cylinder only, i.e. less valve. Worthington Cylinders at Dive Rite Express

CylinderService
Pressure
(psi)Diameter
(inches)Height
(inches)Weight
Empty
(pounds)Buoyancy
Full : Empty
(pounds)X7 Steel 80 (http://www.diveriteexpress.com/gas/steel.shtml#x780)34427.2519.728- 9.0 : - 3.0X7 Steel 100 (http://www.diveriteexpress.com/gas/steel.shtml#x7100)34427.2524.033- 10.0 : - 2.5X7 Steel 120 (http://www.diveriteexpress.com/gas/steel.shtml#x7120)34427.2528.038- 11.0 : - 2.0X8 Steel 119 (http://www.diveriteexpress.com/gas/steel.shtml#x8119)34428.0024.042- 10.9 : - 2.0X8 Steel 130 (http://www.diveriteexpress.com/gas/steel.shtml#x8130)34428.0025.543- 11.7 : - 2.0Comparison Only - Aluminum 8030007.2526.1031.4- 1.4 : + 4.4Buoyancy specification for cylinder and valve in seawater.

abcitydiver
10-10-2007, 12:35
That was great, and a FAST response! I'm a little green on this subject, but I kind of remember seeing larger Al tanks....?
If so, I need the info on those as well :::batting eyelashes:::

Thanks!
Jane

subsur
10-10-2007, 12:46
http://www.techdivinglimited.com/pub/tanks.html

subsur
10-10-2007, 12:50
actually, i would suggest going to manufacturer's sites and get the info from them. here are links for Steel Tank Manufacturers specs
for worthington cylinders:
http://www.xsscuba.com/tank_steel_specs.html
for faber cylinders:
http://www.bluesteelllc.com/products.htm
for pressed steel tanks (i did not see their buoyancy characteristics):
http://www.pstscuba.com/products.htm

CompuDude
10-10-2007, 12:54
actually, i would suggest going to manufacturer's sites and get the info from them. here are links for Steel Tank Manufacturers specs
for worthington cylinders:
http://www.xsscuba.com/tank_steel_specs.html
for faber cylinders:
http://www.bluesteelllc.com/products.htm
for pressed steel tanks (i did not see their buoyancy characteristics):
http://www.pstscuba.com/products.htm

I'd go to the manuf. pages for XS Scuba/Worthington and Faber, but PST's info is accurate on the TechDivingLimited page, as is the info on Luxfer and Catalina tanks, from my understanding. (Which is good, because PST no longer has any tank specs on their pitiful excuse for a website.)

Faber and Worthington have some new and changed tanks that aren't 100% accurately reflected on the TDL page, however. Can't recall which, but I know I found some things that had changed at one point. Sent Joel an email, but I don't think anything was ever updated.

No Misses
10-10-2007, 13:06
Aw shucks missy, I could never resist a coy smile ;-)
Most dive operations use AL80 tanks, unless you are doing some DEEP diving somewhere. There are a few oddball AL tanks in the 100 cf range. But, they are few and far between. Most likely you will see steel used for anything over 80 cf. I have attempted to past another chart that shows HP (high Pressure) and LP (low pressure) comparisons.

http://www.divesports.com/mall/worthington_LP7_LP77.asp

Use This Chart to Compare Various Worthington Cylinder Sizes


Model
Volume
Service
Pressure
Buoyancy
Full
Buoyancy
Empty
Weight
Diameter
Height
X7-8080 CF3442 PSI-9.0 LBS-3.0 LBS28 LBS7.25"19.7"X7-100100 CF3442 PSI-10.0 LBS-2.5 LBS33 LBS7.25"24.0"X7-120120 CF3442 PSI-11.0 LBS-2.0 LBS38 LBS7.25"28.0"X8-119119 CF3442 PSI-10.9 LBS-2.0 LBS42 LBS8.00"24.0"X8-130130 CF3442 PSI-11.7 LBS-2.0 LBS43 LBS8.00"25.5"LP-7777 CF2400+PSI-6.8 LBS-1.0 LBS32.5 LBS7.25"23.2"LP7-85 *85 CF2400+ PSI-6.0 LBSNeutral34 LBS7.25"25.0"LP8-95 *95 CF2400+ PSI-8.0 LBS-1.0 LBS40 LBS8.00"24.0"LP8-108 *108 CF2400+ PSI-8.0 LBSNeutral43 LBS8.00"26.0"LP8-121 *121 CF2400+ PSI-9.0 LBS+1.0 LBS47 LBS8.00"29.0"* The service pressure of low pressure cylinders (LP Series) is 2400 PSI. However, they can be filled to a pressure of 2640 PSI for the duration of the original hydrostatic inspection life and on subsequent hydrostatic inspections if the + rating is awarded. Listed volumes for low pressure (LP Series) cylinders are based on a fill pressure of 2640 PSI.

abcitydiver
10-10-2007, 13:35
What a great group you are! (reminder to self: keep the eyelashes for big questions).
No Misses, I had one of those "odd ball" AL tanks strapped to me in Coz, right after getting certified. I think the DM thought I was gonna suck air...
The result was half way through the dive it took two people to hold me under water....i got THAT boyant. So knowing what tank I'm up against seems prudent ;-)

Jane

cummings66
10-10-2007, 20:54
You didn't get that buoyant from a larger tank, you got that way because your instructor/DM did not weight you properly. You would have been light in an AL80 by the way and still need the help. There are small differences between tanks of course and a lb or two won't do what happened to you. That was a gross misweighting problem due to a mistake.

comet24
10-10-2007, 22:09
Great info here.