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Can I clean an air tank to make it oxygen compatible? How?

Discussion in 'Tanks, Valves & Bands' started by ginti, Jan 17, 2021.

  1. jale

    jale Barangay Pasaway

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    The op is in Europe where nobody cares about hog and deep :)
     
    rjack321 and ginti like this.
  2. JahJahwarrior

    JahJahwarrior ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: West Palm Beach, Fl
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    The concern with oxygen is any carbon contamination, like grease.

    The "washing liquid" should be a strong degreaser. The components of cleaning are time, temperature, chemicals and physical agitation. It's hard to get physical inside a tank, so you have to focus on degrease chemical, hot water, and a little time. You can put your valve or a plug in and roll the tank back and forth to get some physical action, but do make sure to clean the threads with a toothbrush.

    Simple Green is a good degreaser that is easily available in the US, and I'm sure you can find something similar in France. Some people prefer the "crystal" version that doesn't smell as strongly, but I am ok with strong smells. You need to rinse until you can't smell it at all.

    I think the more important is the valve, because that's where the gases are going around tight corners and moving quickly. Disassemble the valve completely and wash all parts, except the knob, in an ultrasonic cleaner with the same degreaser and hot water. Make sure all grease or residue is removed, and reassemble with an oxygen compatible lubrication.

    Oxygen cleaning sufficient for technical diving is not rocket science, but it is important to do well. It's better when you are the one who will be filling the tanks, because I trust you will want to avoid harming yourself, and will clean very well.
     
    ginti likes this.
  3. Marie13

    Marie13 Great Lakes Mermaid ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Great Lakes
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    TDI offers a course on O2 cleaning. You might check to see if it’s available to you. Will wherever you get fills accept a tank O2 cleaned by a diver or will you have to pay them to do it? Best ask that question before you shell out for a course.
     
  4. happy-diver

    happy-diver Skindiver Just feelin it

    # of Dives: 2,500 - 4,999
    Location: Same ocean as you!
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    Bank Bottles

    Check this guy out he's on the ball

    But he doesn't use scented dishwashing liquid from the supermarket like the local dive shop does
    nor show his rumbling customers the same bottle of rusty water like another local dive shop does!
     
    Norwegian Cave Diver likes this.
  5. rjack321

    rjack321 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, Washington State
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    Killing the fill station operator in an O2 fire is definitely bad form.
     
  6. jale

    jale Barangay Pasaway

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    For the OP:
    As you are in France, do as the Romans do (or should I say, do as the Parisians do) and use "lessive St Marc" :)
     
    ginti likes this.
  7. happy-diver

    happy-diver Skindiver Just feelin it

    # of Dives: 2,500 - 4,999
    Location: Same ocean as you!
    2,341
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    Yeah but you don't want pine stench in your tank
     
    jale likes this.
  8. jale

    jale Barangay Pasaway

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    But original St Marc is natural ... pine is quite nice :) :)
     
  9. happy-diver

    happy-diver Skindiver Just feelin it

    # of Dives: 2,500 - 4,999
    Location: Same ocean as you!
    2,341
    1,561
    Well good otherwise it takes much much boiling water to neutralise the fragrance

    I was today at the dive shop it smells of pine, they make pallets next door
    The desensitised palates of staff can no longer smell such scents as pine
     
  10. jborg

    jborg Lurker ScubaBoard Sponsor

    # of Dives: 50 - 99
    Location: Sweden
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    Since you're in France, CMAS have Nitrox Gas Blender and presumably cleaning/technician courses and certificates. Maybe a local club can assist.
     
    rjack321 and ginti like this.

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