The technique is applicable to any test specimen on which a pressure differential can be created across the area to be examined. An example of this technique is the application of leak-test solutions to pressurized gas-line joints. It is most useful on piping systems, pressure vessels, storage tanks.

Three types of boxes (test frames) are applied by CORROCONT Ltd that can be fitted to the proper type of weld: butt weld, fillet weld, corner fillet weld.