One man's trash is another man's treasure.

Discussion in 'Tanks, Valves and Bands' started by mwilding, Feb 28, 2004.

  1. mwilding

    mwilding Surface Interval Member

    # of Dives: 25 - 49
    Location: Glen Ridge, NJ
    662
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    So, I found two abandoned scuba tanks today. They are both AL80s, both have 10 years since last hydro, and both had their valves OPEN when I found them. Externally they seem to be in okay shape.

    I figured I could get them hydroed and VIP'd and have myself some cheap tanks, but finding them with the valves open has me a bit worried.

    Does this make it likely they are rusted inside? If so, would a tumbling put it right? And what will all this cost me?
     
  2. Uncle Pug

    Uncle Pug Swims with Orca ScubaBoard Supporter

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    Kewl.... wind chimes!

    Aluminum 80s don't rust inside but if they are 10 years since their last hydro they are probably the *bad* alloy.

    Still they might be worth a tumble.
     
  3. Walter

    Walter Scuba Instructor

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    They may or may not be good, but they won't be rusted.
     
  4. mwilding

    mwilding Surface Interval Member

    # of Dives: 25 - 49
    Location: Glen Ridge, NJ
    662
    0
    0
    So what is the best course of action? Drop em off at the LDS and say have at it?
     
  5. Uncle Pug

    Uncle Pug Swims with Orca ScubaBoard Supporter

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    Well... first ascertain the manufacturer and date. Then call around to the various dive shops and ask them if they will fill the tanks if they pass hydro, vis and eddy current test. The shop that says yes is the one to take them to.
     
  6. mwilding

    mwilding Surface Interval Member

    # of Dives: 25 - 49
    Location: Glen Ridge, NJ
    662
    0
    0
    Why wouldn't they fill them if the passed all 3 tests?
     
  7. LUBOLD8431

    LUBOLD8431 Scuba Instructor

    # of Dives:
    Location: New York, NY
    2,037
    9
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    Some shops in FL, and other states refuse to fill any tank made with the 6351 alloy (susceptible to Sustained Load Cracking of the neck threads).

    What's the original hydro and manufacturer of these cylinders? If you let us know, we can tell you if they are good or not...
     
  8. mwilding

    mwilding Surface Interval Member

    # of Dives: 25 - 49
    Location: Glen Ridge, NJ
    662
    0
    0
    /me leaves to walk dog and check the tanks that are in the trunk of my car a black away...
     
  9. LUBOLD8431

    LUBOLD8431 Scuba Instructor

    # of Dives:
    Location: New York, NY
    2,037
    9
    38
    Jeez... I didnt mean to send you out in the middle of the night... I hope you have your mace with you too for the walk!!!
     
  10. mwilding

    mwilding Surface Interval Member

    # of Dives: 25 - 49
    Location: Glen Ridge, NJ
    662
    0
    0
  11. DivemasterSteve

    DivemasterSteve Scuba Instructor

    439
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    LOL, oh yes... thats much better than mace. he is a nice looking puppy.

    steve
     
  12. mwilding

    mwilding Surface Interval Member

    # of Dives: 25 - 49
    Location: Glen Ridge, NJ
    662
    0
    0
    Tank 1: Yellow w/ Aqualung/US Divers sticker

    Markings:
    Luxfer 9-83
    3AL3000 S80
    P77214

    Tank 2: White w/ no other distinguishing marks (except mesh cover)

    Markings:
    8-88
    3AL3000 S80
    A75682
     
  13. Uncle Pug

    Uncle Pug Swims with Orca ScubaBoard Supporter

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  14. mwilding

    mwilding Surface Interval Member

    # of Dives: 25 - 49
    Location: Glen Ridge, NJ
    662
    0
    0
    :confused_

    that bad?
     
  15. Uncle Pug

    Uncle Pug Swims with Orca ScubaBoard Supporter

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    The one made 8-88 might not be made of the 6351 alloy since Luxfer supposedly quit using it mid 88... however my guess is that some shops will not be willing to fill either one in any case.

    Now for the good news. Since the issue with this alloy is sustain load cracking and these cylinders have not had a sustained load for some time they are most likely perfectly fine.

    The issue will revolve around whether or not any shop near you will fill them if they do pass the requisite hydro, vip and eddy current tests. Hence my initial suggestion to call around and find that out.
     
  16. mwilding

    mwilding Surface Interval Member

    # of Dives: 25 - 49
    Location: Glen Ridge, NJ
    662
    0
    0
    cool thanks...

    Hopefully Hoboken Dive Center will say yes as they are 3 blocks away...
     
  17. diverrick

    diverrick Manta Ray

    890
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    HOT. dumped in a hurry by someone, too heavy to run with or they didn't know what they had, and dumped em.
     
  18. LUBOLD8431

    LUBOLD8431 Scuba Instructor

    # of Dives:
    Location: New York, NY
    2,037
    9
    38

    Like UP said, they need to pass a hydro and VIP before you get all excited.

    Bad news is first one is the 6351 alloy...
    Good news is I believe the second one is 6061 alloy based on the date manufactured, but it would help to know the manufacturer of that cylinder.
     
  19. livestodive

    livestodive Nassau Grouper

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    You still got 2 free valves :)
     
  20. FredT

    FredT Loggerhead Turtle

    # of Dives: I'm a Fish!
    Location: The remains of the MS Gulf coast
    1,507
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    Wait Until next year to have the '83 tank hydroed, and take it directly to the local hydro facility (look in the phone book under firefighting equipment) less the valve. In 2005 _every_ hydro facility inthe US will have to be equipped to do the new DOT mandated inspection for SLC. TheLDS probably takes the tanks you drop off to them, or to a sister fire equipment or compressed industrial gas company for hydros anyway. If it passes you can have the LDS service the tank to use for diving or pneumatic tools. If not you are only out about $15 bucks for the hydro. Even a 6351 tank has well over a 90% chance of passing a properly done inspection if it has no external or internal corrosion.

    FT
     

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