VACUUM BOX TESTING

Vacuum boxes are used to test small, specific areas of any type of weld. The box is constructed from thick, clear Perspex with a closed cell foam seal along the bottom edge.

A vacuum gauge and hose coupling is also fitted to the box. A soapy solution is applied to the seam to be tested.

The vacuum box is then positioned over the seam and a vacuum is induced inside the box. Any drop in the vacuum or bubble formation on the surface is a clear indication that the tested weld is faulty.