Medical Gas Professional Healthcare Organization

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Instrument Air

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  • Saturday, April 21, 2018 2:15 AM
    Reply # 6113461 on 6109711

     Booms are not considered surgical instruments. 

  • Sunday, April 22, 2018 10:39 AM
    Reply # 6114400 on 6109711
    Al Moon (Administrator)

    Just a word of caution !

    Yes the cause and effect:

    In regards to the reduction of the IA system receiver pressure 

    (original listed as 200 psig) and the final line pressure (still in table 5.1.11 listed as 169-185 psig) for a Instrument Air ( IA ) Medical Support Gas.

    The NFPA 99 Edition 2018, provides a statement that allow, a reduction in the source and final line delivery pressures. In my opinion the wording is weak .

    Section &

    This change still refers us back to Table #5.1.11

    which has IA pressures between 160-185 psig.

    But no matter what you do / the system still has to provide the following requirements . 

    1) Quality of IA Source (i.e. up-stream of the final line regulator) 

    a pressure Dew-Point of -40 C ( -40 F)

    2) Master and Local Alarms, if the IA system delivery pressure exceeds a pressure Dew-Point of -30 C ( -22 F )

    The above is just a short listed of all the items or conditions still required.

    (see the full section #

    Also for those with existing IA systems with the intent of just turning down the final line pressure to less than the listed (160-185 psig), remember to replace the pressures relief valves to meeting the code.   

  • Tuesday, April 24, 2018 5:26 AM
    Reply # 6117508 on 6109711
    Steve Bradshaw (Administrator)

    I think Corky is right

    Using ~60 psig "Non-Medical Air" instead of Instrument Air does not require costly zone valves, area alarms, master alarms, special instrument air labels, and a very expensive source supply.  In my opinion Instrument Air is "permitted," but not "required" to be used for boom brakes, and a much less expensive Non-Medical Air system is also permitted to be used for boom brakes.

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