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Thread: Dental office gas

  1. #1
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    Dental office gas

    Nitrous oxide used in conjunction with oxygen in dental office is it hazardous, flammable or combustible?

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  2. #2
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    Nitrous Oxide is Nonflammable.

    At elevated temperatures, nitrous oxide is a powerful oxidizer similar to molecular oxygen.

    Chris

  3. #3
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    Quote Originally Posted by raider1 View Post
    Nitrous Oxide is Nonflammable.

    At elevated temperatures, nitrous oxide is a powerful oxidizer similar to molecular oxygen.

    Chris
    Is nitrous oxide used in dental office hazardous?

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  4. #4
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    Quote Originally Posted by codequestion View Post
    Is nitrous oxide used in dental office hazardous?

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    Hazardous in what context?

    Nitrous Oxide is not a flammable gas from a NEC standpoint so the use of Nitrous Oxide would not create a Hazardous Classified Location in accordance with Chapter 5.

    The major safety hazards of nitrous oxide come from the fact that it is a compressed liquefied gas, an asphyxiation risk, and a dissociative anesthetic.

    Chris

  5. #5
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    Quote Originally Posted by codequestion View Post
    Nitrous oxide used in conjunction with oxygen in dental office is it hazardous, flammable or combustible?
    nitrous oxide isn't flammable. when it breaks down, as in an engine,
    it produces an awful lot of oxygen to make power with.

    and pure oxygen isn't flammable either. however, it's a powerful
    oxidant. pure oxygen can combine with petroleum, as in oil or grease,
    and burn furiously with no source of ignition. spontaneous combustion.

    if the oil or grease ignites in an oxygen rich atmosphere, things don't go well.

    there are rules for medical gases. google away....
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  6. #6
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    The previous responses are correct; nitrous oxide is not flammable. With regard to the potential enhanced oxygenation that might be created (highly unlikely in a dental office application), see the opening statement in Section 500.6
    "Bob"
    Robert B. Alexander, P.E.
    Answers based on 2014 NEC unless otherwise noted.

  7. #7
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    Quote Originally Posted by rbalex View Post
    The previous responses are correct; nitrous oxide is not flammable. With regard to the potential enhanced oxygenation that might be created (highly unlikely in a dental office application), see the opening statement in Section 500.6
    I am more concerned about hazardous classified oer nec 517 anestheszating location.

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  8. #8
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    Quote Originally Posted by codequestion View Post
    I am more concerned about hazardous classified oer nec 517 anestheszating location.

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    That’s fine; but you have to determine if the anesthetic is flammable [Section 517.60(A)]; in the unlikely event they were used together, nitrous oxide won’t make a nonflammable anesthetic flammable. [Section 517.60(B)]
    "Bob"
    Robert B. Alexander, P.E.
    Answers based on 2014 NEC unless otherwise noted.

  9. #9
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    (EDITED) Nitrous oxide with oxygen in dental office is non flammable inhalation anesthetic see def 517.2 anesthetizing location. Now I have to determine NEC 517.61 A, B or C to use. Part A and B says Hazadrous (classified) and part C says other than Hazardous. My question boils down to which part to use A and B or just C?



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  10. #10
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    Oxygen, enriched or otherwise, won’t make nitrous oxide flammable either.
    "Bob"
    Robert B. Alexander, P.E.
    Answers based on 2014 NEC unless otherwise noted.

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