Liquid Penetrant Inspections
Liquid Penetrant Inspection is a method of revealing discontinuities that are open to the surfaces of a solid and essentially non porous material.
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What this test helps us understand
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- detecting surface breaking defects on a non porous material giving a two dimensional ( length and width) indication
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What we commonly test
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- many industrial components
- parts with complex geometric shapes
- performing leak checks
- almost any material provided that its surface is not extremely rough or porous
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Test method summary
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- surfaces being tested need to be thoroughly cleaned
- treat the area with an approved liquid dye containing visible or fluorescent particles. Time is allowed for the liquid to seek out and enter openings into the surface.
- the liqiud remaining on the surface is then cleaned off and a powder developer is applied to reveal the flaw pattern under white light (when visible dye penetrants are used) or under ultraviolet light (when fluorescent penetrants are used).
- once testing is complete the penetrant that flowed into the defect or crack can be safely removed
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Learn more about
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