- How to Do Fluorescent Liquid Penetrant Testing [Video]
How to Do Fluorescent Liquid Penetrant Testing [Video]
Learn about the penetrant inspection method of nondestructive testing, including basic steps for NDT with an AMS 2644 Type 1 water washable penetrant
Just like all nondestructive testing methods, the results of a penetrant inspection are only reliable if the inspection is performed accurately and consistently.
In this video Magnaflux’s Brian Batteiger goes through the common steps of liquid penetrant testing as outlined in ASTM E1417: Standard Practice for Liquid Penetrant Testing.
- Surface preparation: It is important for the test surface to be clean, dry and free from any dirt, grease, paint or other materials which might interfere with the inspection.
- Penetrant application: Liquid penetrant can be applied to the test surface by dipping, brushing or spraying.
- Penetrant dwell time: Penetrant needs to be given adequate time to enter any discontinuities. The dwell time will be determined by several parameters, including the type of penetrant, type of developer and type of defect needing to be found.
- Excess penetrant removal: Penetrant remaining on the surface needs to be carefully removed while not disturbing the penetrant which has seeped into any discontinuities. Depending on the type of remover method, the part may need to be dried in an oven after the excess penetrant is removed.
- Developer application: A thin, even layer of developer is applied to draw out the penetrant in the discontinuity to the surface to form indications. The developing time will vary depending on the penetrant, type of developer and type of flaws.
- Inspection: The part is evaluated under the appropriate lighting conditions for indications and the appropriate steps taken to interpret and document any findings.
- Postcleaning: Parts are cleaned after inspection to remove any remaining develop and penetrant.
This is meant to provide a general overview of a typical LPI process; all NDT testing must be performed in accordance with the prescribed specifications or test procedures.
After watching the video, please visit our Penetrant Testing section for additional information and education resources.
Please wait while we gather your results.
Related Blog Posts
Learn the differences between type testing, batch testing and in-use testing for NDT liquid penetrants.
How perception and vision can have a significant impact on probability of detection in non-destructive testing inspections.
Some handy tips for beginners who are new to visible dye penetrant testing or NDT pros who want an easy reference guide.
We reveal common misperceptions about liquid penetrant inspection we’ve seen in the field in recent years
Learn the differences between water-removable and non-water-washable liquid penetrant to figure out which is right for you
Understand fluorescent liquid penetrant sensitivity levels and how to find the right one for your application
Watch a demonstration of the penetrant inspection method according to ASTM E1417, including basic steps for NDT with an AMS 2644 Type 1 penetrant.
Read more about using penetrant testing products to inspect for leaks by using fluorescent or visible/colored penetrant to enhance visual detection of leaks.
Learn how liquid penetrant testing consumable products get contaminated over time and what you can do to ensure your penetrant system performance.