CQI utilized Liquid Penetrant Testing (LPI) as one of our non-destructive testing methods. It works by spreading a liquid penetrant evenly over the surface being examined and allowed to enter open discontinuities. After sometime the excess is removed and a substance is then used to draw the entrapped penetrant out of the discontinuity and stain the substance. From there our inspector can 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 very suitable for finding discontinuities that are open to the surface and for large surface areas. Please ask us about how this inspection method may help your business.