-Sistema para la detection of defects, porosity or cracks in plate joints and welds located on the bottom and roof of tanks. Vacuum boxes allow fast and safe inspection of weld joints in tanks, pipelines and many welded structures.

-They can also be used instead of a hydraulic pressure test if that would be too costly or, for example, if the wall thickness is too small and might not provide a reliable result.

They are especially used for leak tests where structures are accessible from only one side (tank floors) or for testing open structures (collection pits).