CQI utilizes Liquid Penetrant Testing (LPI) as one of our non-destructive testing methods. This method works by spreading a liquid penetrant evenly over the surface being examined and allowed to enter open discontinuities. After some time, the excess is removed, and a substance is then used to draw the entrapped penetrant out of the discontinuity and stain the substance. Our qualified inspectors then examine the surface to determine the presence or absence of indications. LPI can be used at fabrication facilities and on field sites. It consists of several NDT techniques for detecting flaws or discontinuities that are open to the surface such as:

Cracks
Seams
Laps
Cold shuts
Laminations
Isolated porosity
Through leaks
Lack of fusion

LPI can be used effectively for the examination of non-porous, metallic materials (both ferrous & non-ferrous), and of non-metallic materials such as glazed or fully densified ceramics and glass. It is also suitable for finding discontinuities that are open to the surface and for large surface areas.