A better understanding of psia vs. psig
A better understanding of psia vs. psig
(OP)
Fill a scuba tank up to 10psig (sea level, outside on a boat) and put that scuba tank into a decompression chamber and pressureize the decompression chamber to 24.7psia. If you were living inside the decompression chamber with the scuba tank that was filled with 10psig, and you put a pressure gauage (psig) on the tank. What would that psig read that you just put on the scuba tank? Would it be 0 because the ambient air pressure (decompression chamber 24.7psia) is equal to the scuba tank pressure (10psig)?
Thanks Wes
Thanks Wes





RE: A better understanding of psia vs. psig
RE: A better understanding of psia vs. psig
RE: A better understanding of psia vs. psig
RE: A better understanding of psia vs. psig
David
RE: A better understanding of psia vs. psig
RE: A better understanding of psia vs. psig
If the tank starts off with an internal pressure of 27.4psia, it is not going to discharge into an atmosphere of 24.7psia.
Cheers,
John
RE: A better understanding of psia vs. psig
RE: A better understanding of psia vs. psig
Pressure Measurement
Good on ya,
Goober Dave
RE: A better understanding of psia vs. psig
The barometric chamber simulates atmospheric pressure so if you put your scuba tank with 10 psig into the chamber and pressured the chamber up to 23.1 ft of water or 14939 ft below sea level (24.7 psia), the gauge on the tank would read zero and if you open the valve you would not get any organized flow (there would be some gas exchange, but the flow would be equally as likely to be predominantly in as out if the gauges were both well calibrated).
David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
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RE: A better understanding of psia vs. psig
RE: A better understanding of psia vs. psig
RE: A better understanding of psia vs. psig
RE: A better understanding of psia vs. psig
RE: A better understanding of psia vs. psig