CTI Inspection and Audit Inc. As directed by standards, regulations, procedures and customer requests, it can perform various methods of leak testing on new components, helping to detect leaks under existing conditions.

Bubble Test

Bubble test is used to find the leak in many different components. The two most common bubble leak tests are the direct pressure technique and the vacuum box technique. The direct pressure technique is accomplished by pressurizing a component with a gas and then either immersing it in a solution or applying a solution outside the component. If there is a leak, a bubble will form on the surface due to leaking gas passing through the solution. The vacuum box technique is performed where it cannot be directly pressurized or where there is no access to either side of a part. The test is carried out by applying a solution to an area of a pressure boundary surface and creating a pressure difference across the area, causing the formation of bubbles, such as atmospheric air, as leak gas.

Halogen Diode Test

The halogen diode detector probe test is a way to perform a leak test to detect the presence of halogen using a tracer gas and a detector probe. Detection of halogen along a pressure limit indicates the presence of a leak.

Pressure Change

The pressure change test is performed to determine the leak rate of a closed component or system along the boundaries of a given pressure or vacuum. By monitoring the change in pressure over a period of time, the leakage rate can be determined by a pressure loss in a pressure system or an increase in pressure in a system under vacuum. The change in pressure can then be compared to the maximum allowable change of mass change in unit volume or unit time at the pressure per unit of time.

Mass Spectrometry

The helium leak mass spectrometer test is a way to detect very small leaks at the pressure limit. The test is carried out using a mass spectrometer calibrated to detect the presence of helium molecules. Helium molecules are very small, so using helium as a tracer gas will find very small leaks that other leak tests cannot find. This can be done in one of three ways: - Detector-probe technique - Tracer-probe technique - Hood technique The detector-probe test is carried out by pressurizing a component with helium gas and then scanning the presence of the "sniffing" component. Detector probe helium. Mass spectrometry is monitored to confirm the presence of helium leakage. Tracer-probe testing is performed by placing the component under a vacuum and connecting it to the mass spectrometer. The tracer probe is then used to spray helium around the tested component. Mass spectrometry is monitored to confirm the presence of helium leakage.