How To Conduct A Helium Leak Test

By Debra Cox


In this test, helium is normally used in detecting small leaks or big leakage in bigger volumes. It is normally used as a tracer gas whereas the concentration is measured. Helium leak test is useful in testing leaks as it is inert hence very safe for usage. In addition, it does not react with other materials within the part awaiting testing.

In a majority of the experiments done, a specialized device known as the mass spectrometer is required. One main advantage you will get by utilizing helium is that it will identify very small leaks when compared to other experiments. It uses a temperature independent dry procedure.

This type of test is very important when utilizing a vacuum system or even high pressure as it helps you to determine if a system is leak free. The leak detection unit creates a vacuum inside the product that you want to test. The fumes will then be sprayed on the outside. If helium is detected on the exterior of the system, you will be alerted with the detection unit. This enables you to determine the area of failure.

The two main approaches are the pressure testing and vacuum testing. The best detection method is determined by the working conditions of a product that should be tested. In vacuum testing technique, a product will be tested from the inside. The device ought to be evacuated followed by spraying the gas on the site of the leakage. Any helium detected inside the device when the test has been carried out confirms a leak. This indicates that repair ought to be done.

For you to be provided with results you can count on always, the leakage detection unit needs to be maintained. Ensure that you follow your manufacturers guidance on maintenance. Yearly services including monthly and weekly inspections should also not be forgotten to conclude if the unit is working well. It also should be calibrated often since it a straightforward and easy task.

Gas is portrayed by its unique odor. Due to this, any normal person can notice it with ease when the concentration is below a volatile range. This range of concentration is between zero point five and one percent. Fumes odor is an indication of a leak and therefore any suspicions ought to be looked into immediately. If a leak is noticed, fumes movement should be traced. If there is a likelihood of misfortune, the misfortune needs elimination.

Insects like flies, roaches spiders normally migrate to points of leaks because of microbial breakdown. Because some insects love the smell of gas, heavy insect activity near the regulator or meter can indicate a leakage. To confirm this, a test needs to be carried out.

Fungus growth around the valve box may indicate a leak. This is because fungi mostly grow around areas without enough oxygen. It is characterized by a white or greyish white color. Such an indication requires investigation with immediate effect using the detection unit. To add on this, any person carrying out the test should only approach a manhole after testing the concentration of oxygen and other gases.




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