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Purge gas flow times
2

Purge gas flow times

Purge gas flow times

(OP)
Does anyone know where I can get a chart showing purge gas flow times for a given volume change? Or, what formula would I use to make my own table.

Richard Schram
Mechanical Integrity Specialist
Pharmacia Global Supply Arecibo-P. Rico
rschram@pharmacia.com

RE: Purge gas flow times

2
HoursPerVolumeChange= (((id / 2)^2 * pi / 144)) * length) / flowrate)

id=id in inches
length=length in feet
flowrate=flow rate in cfh

The above is part of a visual basic function. I have an excel spreadsheet I could send to you if this is what you are looking for.

Pardon the formula but my math education stopped at the 9th grade. There is probably a better way.

RE: Purge gas flow times

(OP)
pipewelder1999,
 
That is exactly what I was looking for. I would greatly appreciate the spreadsheet, my email address is in the post.  

Richard Schram
Mechanical Integrity Specialist
Pharmacia Global Supply Arecibo-P. Rico
rschram@pharmacia.com

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