Measuring and testing – With fluid pressure – Leakage
Patent
1994-06-20
1995-02-21
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73 492, 73 52, 73 40, G01M 320, G01M 304
Patent
active
053905334
ABSTRACT:
A process and system for pressurizing a vessel for integrity testing with gas comprising helium, recovering the gas comprising helium, and purifying the gas comprising helium for reuse. The process for purifying the gas stream comprising helium comprises drying the gas stream; separating the dried gas stream in a membrane separator stage into a helium-enriched permeate product stream and a helium-depleted raffinate stream; recovering helium in the raffinate stream in a membrane stripper stage thereby producing a purge stream; and purging water from the dryer with the purge stream.
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Umezu et al, "New Automatic Leak Testing System With Helium Mass Spectrometer Leak Detector", Journal of Vacuum Society of Japan, vol. 17, No. 2, 1974, pp. 45-52.
Giglia Salvatore
Gorjaczkowski Vladimir T.
Heim Carl J.
Schulte Thomas R.
Ktorides Stanley
Praxair Technology Inc.
Wiggins J. David
Williams Hezron E.
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