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oxygen tank death

Discussion in 'Accidents and Incidents' started by abnfrog, Oct 11, 2019.

  1. dberry

    dberry Hydrophilic ScubaBoard Supporter

    # of Dives: 100 - 199
    Location: Philadelphia
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    The OP was about a tank valve coming off a full-sized cylinder, but I thought some of the other comments were about how to tighten a regulator to a full-sized tank, whether to use a dedicated wrench or an adjustable, etc.). I may very well have been wrong.
     
  2. abnfrog

    abnfrog Tech Instructor

    # of Dives: 2,500 - 4,999
    Location: great white north
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    yep it went astray , somewhere , just wanted to point out o2 is more dangerous than reg air
     
  3. Dan

    Dan Orca

    # of Dives: 500 - 999
    Location: Lake Jackson, Texas
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    I was just commenting that a cheater bar, used by @happy-diver shown in his post # 62, page 7, is a no no in where I work. @Wookie is more concerned about the adjustable wrench part.
     
  4. PBcatfish

    PBcatfish Regular of the Pub

    # of Dives: 500 - 999
    Location: Florida
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    Thanks, that's enough for me. I can measure the actual threads on a regulator & get all the thread data that I need.
     
  5. michael-fisch

    michael-fisch Manta Ray

    # of Dives: 2,500 - 4,999
    Location: Germany
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    Google the dimensions of Whitworth G5/8" which is all you need for the bar.

    Michael
     
  6. PBcatfish

    PBcatfish Regular of the Pub

    # of Dives: 500 - 999
    Location: Florida
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    I must have missed something. In what way does this example show that O2 is more dangerous than air? It looks to me like this example shows that high pressure gas is dangerous, regardless of gas type. Are you saying that because corrosion was said to be present that the corrosive properties of O2 are to blame?
     
  7. abnfrog

    abnfrog Tech Instructor

    # of Dives: 2,500 - 4,999
    Location: great white north
    1,430
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    not in for a battle
     
  8. bletso

    bletso Dive Shop

    # of Dives:
    Location: Louisville KY
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    I doubt rolling a cylinder would cause the valve to come out of a pressurised cylinder in good condition. However that being said the article provides no additional information of the condition of the cylinder or valve threads. We have found some really scary stuff over the years we have been hydro testing. Here are two attached. BTW, the bad cylinder was a bank cylinder from a dive shop! That kind of damage would only take a bump just right and oh oh!!

    Most industrial cyls use either a 3/4 or 1 in NGT thread and are torqued to 120-150 ft lb.

    Some more interesting pics

    dsc00757.jpg valvethread.jpg
     
    Peter69_56 likes this.
  9. abnfrog

    abnfrog Tech Instructor

    # of Dives: 2,500 - 4,999
    Location: great white north
    1,430
    892
    113
    scary stuff, for us in the industry
     
  10. PBcatfish

    PBcatfish Regular of the Pub

    # of Dives: 500 - 999
    Location: Florida
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    I wasn't looking for a battle. It was an honest question. Sorry if I came off as being combative.
     

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