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2. Tracer-gas leak testing - Wikipedia

   en.wikipedia.org/wiki/Tracer-gas_leak_testing

   Several standards apply to leak testing and more specifically to tracer-gas leak testing methods, for example: BS EN 1779:1999; leak tightness by indication or measurement of gas leakage, BS EN 13185:2001 Non-destructive testing. Leak testing. Tracer gas method, BS EN 13192:2002 Non-destructive testing. Leak testing.

3. Helium mass spectrometer - Wikipedia

   en.wikipedia.org/wiki/Helium_mass_spectrometer

   A helium mass spectrometer is an instrument commonly used to detect and locate small leaks. It was initially developed in the Manhattan Project during World War II to find extremely small leaks in the gas diffusion process of uranium enrichment plants. [1] It typically uses a vacuum chamber in which a sealed container filled with helium is placed.

4. Accidental release source terms - Wikipedia

   en.wikipedia.org/wiki/Accidental_release_source...

   The mass flow rate can still be increased if the source pressure is increased. Whenever the ratio of the absolute source pressure to the absolute downstream ambient pressure is less than [ (k + 1) / 2] k / (k − 1), then the gas velocity is non-choked (i.e., sub-sonic) and the equation for mass flow rate is:

5. Mass spectrometry - Wikipedia

   en.wikipedia.org/wiki/Mass_spectrometry

   Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio. Mass spectrometry is used in many different fields and is applied to pure samples as well as complex mixtures.

6. Leak detection - Wikipedia

   en.wikipedia.org/wiki/Leak_detection

   Pipeline leak detection is used to ... An RTTM makes it possible to calculate mass ... emissions of liquids and hydrocarbon gas liquids. [18] Detection to alarm ...

7. Discharge coefficient - Wikipedia

   en.wikipedia.org/wiki/Discharge_coefficient

   In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge or efflux coefficient) is the ratio of the actual discharge to the ideal discharge, [1] i.e., the ratio of the mass flow rate at the discharge end of the nozzle to that of an ideal nozzle which expands an identical working fluid from the same initial conditions to the same exit pressures.