The best alternatives to dunk tank leak testing with reliability and automation

 
MODENA, Italy - July 28, 2021 - PRLog -- Dunk testing is one of the traditional ways of testing the leakages in parts.

The way of working here is that the part goes underwater. If there is an air bubble, then it means that there is a leak. However, this is not the case because there could be a leak but not large enough for the air to come out of the part.

It is the most common cause of the dunk test providing false results. However, one of its major benefits is that this method of testing is very affordable and cheap. There are several demerits of this method which are:
  • The rate of error is higher.
  • Not suitable for parts that have corrosive materials.
  • Does not work on the smallest of the leaks.

Because of these demerits or cons of the dunk test method, there is a need for some reliable method. So here we will be sharing the best alternatives to dunk tank leak testing with reliability and automation.

The best alternatives to dunk tank leak testing with reliability and automation:

The following are the best alternatives to dunk testing, and these come with better reliability and automation.

Dry alternatives

When it comes to testing the leak rates of the parts taking dry testing methods is the best way. These tests come with a lot more reliability in comparison to the traditional dunk test methods. There are several ways of dry testing, and some of them are:
  • Pressure decay
  • Mass flow
  • Vacuum decay

In all of these methods of testing, we measure the volumetric flow of air, and this tells about any leakages in part. It is because if there is any difference in the temperature, then it is surely because of a leak. The best part is that these tests are done again and again for better reliability, and this can be done easily. It is because there are no major complexities for these tests.

Tracer gas leak testing

Sometimes the leakage rate is so low that the dry testing method does not work for it. So, in this case, testing the production part with some tracer gas is the best method. So, the most common tracer gas for the testing of leakage is helium gas. This gas works along with a detection device like the spectrometer.

As the helium gas is inert and has a small atomic size, it is the perfect choice for the smallest of leaks. However, sometimes some other gases provide better results. These gases are known as the forming gas. The selection of the gas type is critical. So, it is done keeping things like flammability and pressure in consideration.

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