Dye Penetrant Inspection
Locate Near-Surface Flaws
Dye penetrant inspection, also called liquid penetrant inspection, is a dependable, harmless method of finding near-surface flaws in products and parts. The inspections are performed by first coating clean test pieces with either a fluorescent dye or visible dye penetrant. The pieces are left to sit, allowing the penetrant to have appropriate dwell time to soak into the flaws. After rinsing the test pieces, penetrant is visible only in the areas with flaws or defects. It is important that dye penetrant inspection be performed on products with a non-porous surface since the test pieces are covered in penetrant during testing, yet the dye should only soak into the flaws.
LTI’s liquid penetrant inspection department is equipped to inspect products up to 25 ft. long such as pipe, tubing and barstock. We’re equipped with three large penetrant dip tanks, a 25 ft. dwell tank and a large inspection room with three high-intensity black lights. Lab Testing performs both fluorescent penetrant inspection and red visible dye penetrant inspection. We offer water-washable and post-emulsifiable fluorescent penetrants in sensitivity levels 2, 3 and 4 to meet your specification or application and use high-quality Magnaflux materials for all types of liquid penetrant inspection.