Minumum depht of a discontinuaty to be detected by dye penetrant testing - Dye Penetrant Inspection (PT) (DPI) - NDT Inspection Connection

Minumum depht of a discontinuaty to be detected by dye penetrant testing

Dye Penetrant Inspection (PT) (DPI)

Minumum depht of a discontinuaty to be detected by dye penetrant testing

Posted by arsal on 27/11/2021 at 2:04 pm

Hello,

please tell, which is the minumum depht
(in microns) of a discontinuaty in steel to be detected by dye penetrant testing?

I see (without a magnifying glassa) a crack (length is 5 mm) on perfectly cleaned tested surface, but using of dye penetrant testing does not give an indication. I understand, that it is a surface crack and want to know what is the minimum depht of a discontinuaty to be detected by dye penetrant testing.

lucas replied 1 year ago 2 Members · 1 Reply
1 Reply

lucas

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27/11/2021 at 10:16 pm

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Penetrant Testing is not meant to establish the depth of a defect that is open to the surface. If you really want to know the depth of a surface indication, I recommend using Eddy Current or Ultrasonic Inspection.