LIQUID PENETRANT INSPECTION
Definition
<LIQUID PENETRANT INSPECTION> is <INSPECTING> using a sensitive method of detecting and locating minute discontinuities that are open to the surface of the weld. A penetrating liquid (dye) is applied over the surface of the weld. The fluid then enters the discontinuity. After a short period of time, the excess penetrant is removed from the surface. A developer is applied to the surface and allowed to dry. The penetrant in the discontinuity rises to the surface by capillary action, making the discontinuity easy to see