Fluorescent Penetrant Inspection (FPI) or Liquid Penetrant Inspection (LPI)

In Fluorescent Penetrant Inspection (FPI) or Liquid Penetrant Inspection (LPI) the surface of a part is saturated with a dye.  The dye is cleaned off and a developer is applied to the part, drawing out any dye that has penetrated imperfections such as cracks,  to reveal surface irregularities.  Our skilled inspection technicians use ultraviolet and white-light inspection booths to examine and record these defects.

Fluorescent Penetrant Inspection or Liquid Penetrant Inspection is most often used with non-magnetic metals including titanium, magnesium and aluminum; however it can be applied to ferrous alloys if desired.