Dye Penetrant Inspection (DPI) is used to detect casting, forging and welding surface defects such as hairline cracks, surface porosity, leaks in new products, and fatigue cracks on in-service components.
The penetrant may be applied to all ferrous and non-ferrous materials. It is particularly suitable for the inspection of batch quantities of machined parts and is a cost effective, efficient method of testing for surface breaking discontinuities.
Dye Penetrant Inspection can also be used using fluorescent consumables and ultra-violet black lamps. This is a common technique for the inspection of turbine blades.