Fluorescent Penetrant Inspection (FPI) Resources

Learn more about Fluorescent Penetrant Inspection (FPI) and how this method is used to detect surface-breaking defects in non-porous materials. Explore the resources below for foundational knowledge and guidance on how FPI testing supports quality assurance in critical industries. Looking for FPI services? Visit our Fluorescent Penetrant Inspection page to learn more about our in-house capabilities.

Explore Our FPI Resource Pages


Fluorescent Penetrant Inspection (FPI) 101

Learn how FPI detects surface flaws in non-porous materials, and the advantages that make it a trusted non-destructive testing method for evaluating part integrity in many industries. Continue reading →


Liquid Penetrant Inspection (LPI) 101

Discover how liquid penetrant testing works to detect surface flaws in metal components and support quality assurance programs. Continue reading →


Fluorescent Penetrant Inspection FAQs

Get answers to the questions we hear most often about fluorescent penetrant inspection, from how the process works to which materials and defects it can detect. Find out how FPI compares to other NDT methods and what to expect when testing your components. Continue reading →