FLANGE JOINTS AND VALVES EMISSION DETECTION

The service consists in determining the helium tightness (or with the help of nitrogen mixed with helium) of a part of a pressure system or a pressure vessel. Two variations of this method can be distinguished. The first involves the use of the vacuum method, in which the whole of the tested fragment of the installation or its part is closed in a sealed container. A helium spectrometer used to measure emissions creates a vacuum in the container and catches helium particles that pass through parts of the pressure equipment. The second method consists in "sniffing" the probe at places on the device that can potentially cause leaks (joints, cleanouts, lubricators, welds, etc.). A helium spectrometer is also a leak detector. For the tests, a detailed report is prepared containing information on the locations and volume of the leak.

Helium spectrometer parameters:

• minimal discovered leakage (helium spectrometer) 5*10-12 mbar/(l*s)