Liquid Penetrant testing (LPI, LP) detects flaws and discontinuities which are open to the surface in non-porous products. It can be used on both non-ferrous and ferrous materials. During Liquid Penetrant inspection flaws are detected by bleedout of a colored or fluorescent dye from the defect. This is made possible by the principle of capillary action, which is the ability for a liquid to flow into a narrow space without the assistance of gravity. After the dye is applied to the part and allowed to dwell for a period of time, typically for a minimum of 10 minutes, the excess penetrant is removed. At this time a developer is applied, which functions as a blotter and reveals the presence of any indications. Colored (or contrast) penetrants require bright white lighting conditions while fluorescent penetrants require darkened conditions with the use of a UV-A lamp.
The basic steps of Liquid Penetrant inspection are:
This type of testing presents certain advantages:
When considering Liquid Penetrant inspection it is important to take into account the following factors:
We offer Liquid Penetrant inspection using fluorescent or visible dye materials at various sensitivity levels. Water-washable, post emulsified (hydrophilic) and solvent removable systems are available at the following facilities:
Orbit Industries, Inc.
6840 Lake Abram Drive, Middleburg Heights, OH 44130
|Primary Inspection Services:||Additional Services Available:|
|Red Dye||Indication Removal|
|2132 Qualified||Level III Consulting|
|5 Ton Maximum Capacity||Technical Services|