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  1. #21
    Established TDF Member jamesp's Avatar
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    Quote Originally Posted by Capt Morgan View Post
    I use welding O2 for all my fills and it's been fine, I always analyse it before use
    and I'm happy with the results so far.
    I use diving grade helium but I have access to "Balloon Gas" when analysed it was
    as pure as diving grade but I have never used it, has anyone? It would be interesting
    to know just what the difference is.
    I was under the impression that balloon gas was an air/helium mix to avoid hypoxic incidents?

    Friend had a cylinder in his office for the sales drive, if he still has it I could stick the analyser on it and find out what the He % actually is.

  2. #22
    Where'd The Bubbles Go ....? Capt Morgan's Avatar
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    Quote Originally Posted by jamesp View Post
    I was under the impression that balloon gas was an air/helium mix to avoid hypoxic incidents?

    Friend had a cylinder in his office for the sales drive, if he still has it I could stick the analyser on it and find out what the He % actually is.
    I thought the same but then I came across this and it says 100%, same as what it analysed at.

  3. #23
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    Quote Originally Posted by jamesp View Post
    I was under the impression that balloon gas was an air/helium mix to avoid hypoxic incidents?

    Friend had a cylinder in his office for the sales drive, if he still has it I could stick the analyser on it and find out what the He % actually is.
    I had access to "Balloon gas" once and analysed it, it was 95% Helium. I was under the impression it was 50% helium and 50% Air but but was 95% helium 5% O2 from what I remember.

    One of the things that I wondered about was the words "Diving grade" as both Oxygen and Helium are both elements and as such is there not just one version?
    In remission from Anorexia

  4. #24
    ... Clem's Avatar
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    At least some balloon gas has a lot of other gases inside - this is purely from the experience that the radio controlled shark balloons fly well with pure helium but are too heavy for balloon gas to even lift off...


    Sent from my iPhone using Tapatalk

  5. #25
    Established TDF Member Paulo's Avatar
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    Quote Originally Posted by Capt Morgan View Post
    I thought the same but then I came across this and it says 100%, same as what it analysed at.
    Identifies diving as an accepted use by my reading
    Remember anything you read on the internet was probably written by some guy sitting at home in his underpants! Including this !!

    Illegitimi non carborundum

  6. #26
    Established TDF Member MikeF's Avatar
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    though it looks more like a generic SDS for Helium gas as contained in various supplied products such as balloon gas/diving gas/calibration gas/ purge gas/etc.

    and as a bit of a professional pedant what the 100% bit actually says is :

    Purity: 100 %
    The purity of the substance in this section is used for classification only, and does
    not represent the actual purity of the substance as supplied, for which other
    documentation should be consulted.

    which is a lot different to saying that balloon gas is 100% helium.

  7. #27
    Established TDF Member Paulo's Avatar
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    People that know more about these things than me have told me that they would use industrial grade gases down to around 60m. Past that depth they want the "proper" stuff. I suppose the pp of what ever impurities are magnified at depth
    Remember anything you read on the internet was probably written by some guy sitting at home in his underpants! Including this !!

    Illegitimi non carborundum

  8. #28
    Where'd The Bubbles Go ....? Capt Morgan's Avatar
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    Quote Originally Posted by Paulo View Post
    People that know more about these things than me have told me that they would use industrial grade gases down to around 60m. Past that depth they want the "proper" stuff. I suppose the pp of what ever impurities are magnified at depth
    I've only ever used welding O2 in my unit
    and have been quite a bit deeper than 60m
    with no problems. The balloon gas on the
    other hand just doesn't sit well with me.

  9. #29
    Old but keen Mark Chase's Avatar
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    If in doubt, get the diveing grade and stop fretting about it on the dive.

    Personaly i use welding grade and dont fret over it.

    Amusingly the "diving grade Helium" is guarenteed to be 99.5% pure where as the N5 Industrial grade helium I use is cheaper and guarenteed to be 99.999%???? Go figure


    I can tolerate some impurtitys in my diving grade but I need 100% 02 for my welding

    ATB

  10. #30
    TDF Member Soup Dragon's Avatar
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    Yep another welding 02er here.
    Soup dragon


 
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