Leak detection is used to determine if, and where, a leak has occurred within a system that contains liquids or gases.
Liquid penetrants – like our AUTOGLO® AL-4B – can be used as a non-quantitative method for locating holes/leaks within, for example, heat exchangers, pipes, tanks and vessels.
Leak detection is used to determine if – and where – a leak has occurred within a system that contains liquids or gases.
Liquid penetrants can be used as a non-quantitative method for locating holes and leaks within, for example, heat exchangers, pipes, tanks and vessels.
With heat exchanger plates, the penetrant is applied to one surface and the presence of the penetrant is detected on the reverse surface. With a pipe, tank or vessel, the structure is filled with the penetrant to enable leaks to be detected on the outside surface.
In both cases, the use of a developer on the reverse or outside surface will enhance the detection of the penetrant in the event of a hole or crack being present.
The penetrant dwell time for leak detection will vary in accordance with the size of the defect and the thickness of the structure. Typically, the dwell time will be between 10 and 30 minutes, but a longer dwell time may be necessary for structures with a thickness greater than 5 mm. With any structure, it is important to understand that the presence of a hole or crack will be dependent on other factors, such as pressure or weight of a liquid or gas on the inner surface.
We recommend AUTOGLO® AL-4B for leak detection; this penetrant offers the following benefits:
- UV fluorescence that can easily be detected using a UV lamp.
- Low viscosity which enables it to be applied by brush, conventional spray or electrostatic spray.
- The ability to be diluted with water up to 10 parts water to 1 part AL-4B, for use within pipes and vessels.
- Simple, versatile, reliable and economic.
Product solutions for the inspection of heat exchanger plates