Helium Leak Testing
Axenics specializes in providing helium leak testing for the purpose of identifying and locating even the smallest of leaks in pipes of all diameters. We are certified to perform helium leak testing on a full range of metal and plastic materials.
Standard Helium Leak Testing with Every Weld
Axenics provides accurate helium leak testing services to each of our customers as a guarantee of the quality of our welds. Our goal is to provide peace of mind for our customers, so they can rest assured that our weldments will not leak, and that they will preform perfectly in their overall process. We make sure the integrity of our welds is up to our customers’ standards.
Benefits of Helium Leak Testing
Helium is among the lightest and smallest of molecules, allowing it to penetrate small leaks quickly. The only smaller and lighter molecule is hydrogen; however, its flammable properties and tendency to be more expensive make helium the first choice for leak testing. In addition to being affordable and inflammable, helium is also non-toxic and non-reactive, which makes it very safe to use.
Helium Leak Test Process
Axenics uses a helium mass spectrometer to perform helium leak tests using one of two testing methods, depending upon the working conditions of the product being tested. Our Helium Leak Detection experts have been trained to ensure that the results of the test are read accurately. Axenics has two helium leak testing units at our facility. Our machines are maintained to manufactures specifications on an annual basis, in addition to weekly and monthly inspections and frequent calibration, performed in-house by our expert technicians to ensure they are functioning accurately.
When using the vacuum testing method, the helium leak detection unit will first create a vacuum in the product that is being tested. Once the welded area has been evacuated, the joints (or weldments) are sprayed with helium. If helium is detected on the outside of the product, the unit will alert you the area of the leak.
When using the pressure testing method, the product is pressurized with helium or a mixture of helium and air or nitrogen. A sniffer probe is then used to scan potential leak sites inside the product, and will enable the user to locate any possible leaks.
Helium Leak Testing Q&A
What is helium leak testing?
When is helium leak testing used?
Why is helium leak testing so good for vacuum or pressure systems?
What is a helium mass spectrometer?
What’s the difference between vacuum testing and pressure testing?
Vacuum testing involves pulling vacuum on the product. The helium mass spectrometer is used to measure the helium that is sprayed around each joint being tested.. If there is a leak in the product allowing helium to enter (outside-in leak), the flow rate in the chamber changes and is detected by the mass spectrometer.
Pressure testing is when the product is pressurized with helium and placed into the testing chamber. The mass spectrometer can then detect if any helium enters the chamber from a leak in the vessel. This technique is referred to as “inside-out” leak testing.