pressurize IPA?

[ultrasonicmender]

I am having trouble finding the specification number or the actual data for the following question:

If you are using a pressurized liquid delivery vessel for moving IPA (alcohol), at what pressure must you change from compressed air to inert gas such as nitrogen?

Is this answered in 24 CFR 400? 26 CFR 1019?

As a clarification, we normally have flow rates from .01 to 20 ml/min. This can be done with as little as 5 psi quite often in our systems. With such low energy there was never a concern regarding inerting the tank.

So I need to research which specification defines when I have to use an inert gas.

Any thoughts?

 

[dcasto]

Land Transportation is 49 cfr. Then you get into different modes, rail, truck pipeline. 33 CFR is coast gaurd and water transportation.

40 CFR is environmental, 29 CFR is personal protection inside facilities, OSHA.

None of these mandate air versus N2, only reduction of VOC's in 40 CFR, and risk evaluation in 29 CFR.