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Steel LP72 2250psi tank spec

Discussion in 'Tanks, Valves and Bands' started by eelnoraa, Apr 19, 2010.

  1. eelnoraa

    eelnoraa DIR Practitioner

    # of Dives: 100 - 199
    Location: San Francisco Bay Area
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    Anyone know the spec for this tank?
     
  2. captain

    captain Captain

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    Spec such as ???
     
  3. Scared Silly

    Scared Silly Regular of the Pub

    # of Dives: 500 - 999
    Location: on the path to perdition
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    It is gray ... and holds 65cuft at 2250 psi.











    Buoyancy +/- 1 lbs empty.
    7" diameter
     
  4. elan

    elan DIR Practitioner

    # of Dives: 200 - 499
    Location: Toronto, Ontario, Canada
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    I believe it's 6.9"

    The tanks have the same tank factor as HP100 that is slightly less than 3 (6 for doubles) which means they are of the same internal volume -this another point why I love them :)
    If I'm not mistaken they are of the same height approx as AL80
     
  5. halocline

    halocline Solo Diver

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    Is this what you're looking for?

    72 cu ft Standard
    Service pressure: 2250 psi
    Working pressure: 2475 psi (2250 psi +10%)
    Actual air capacity: 71.2 ft3 (at a working pressure of 2475 psi)
    Outer diameter: 6.9 in
    Length without valve: 25.1 in
    Empty weight: 26 lbs (w/o valve)
    Buoyancy Empty: 0 lbs (w/valve)
    Buoyancy Full: -5.4 lbs (w/valve)

    Capacity at:
    2500 71.9
    2600 74.7
    2700 77.6
    2800 80.5
    2900 83.4
    3000 86.3
     
    guruboy and tech3324 like this.
  6. ZKY

    ZKY Minimalist ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: Santa Rosa, California
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    Even though their small, LP 72's are one of my favorite tanks.
    I like them for short beach dives diving wet. They also make a sweet set of the cutest little doubles you've ever seen.
     
  7. halocline

    halocline Solo Diver

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    They're my favorite tanks; I have a set of doubles and a single. If you can get a slight overfill, just a couple hundred PSI, they have the same capacity as an AL80, while weighing less and having less positive buoyancy. You can easily get the same air for carrying 10lbs less weight. What's not to like about them?
     
  8. eelnoraa

    eelnoraa DIR Practitioner

    # of Dives: 100 - 199
    Location: San Francisco Bay Area
    3,920
    893
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    Thank guys. This is exactly the information I am looking at. I was doing some diving with this tanks over the weekend, so I was very curious about their specs.

    My feeling for them is mixed at best. I like how they are less bouyant then AL80 (noticeable), a bit shorter and narrower also. However, I could not get them fill properly, to 2450psi, at two dive shops in the dive site. Twice they filled to 2200psi, and twice they filled to 1800psi only. The 1800 fill was hot fills, the tank felt warm. I think the issue is the operating pressure itself, 2450 is so low, even a few hundred psi under fill, there is a significant reduction at gas capacity. I guess the big question is how to get them overfill by a few hundred PSI in NorCal.
     
  9. Gombessa

    Gombessa DIR Practitioner

    # of Dives: 200 - 499
    Location: NorCal
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    Same issue with many steel tanks in the bay area - getting a healthy fill can be hard at a lot of dive shops. I do know that at least one local shop that overfills steel tanks will still only fill LP72s to about 2600psi.
     
  10. eelnoraa

    eelnoraa DIR Practitioner

    # of Dives: 100 - 199
    Location: San Francisco Bay Area
    3,920
    893
    113
    2600psi is not bad at all, compare what I got this weekend, 1800 & 2200. Mind telling me which dive shop?
     

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