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What is Dye Penetrant Inspection (DPI)?

Also known as Liquid Penetrant Inspection (LPI), DPI is used to detect cracks, fractures, and surface defects in non-porous materials such as non-ferrous metals, plastics, and ceramics.

Dye penetrant inspections are a great way to make sure that welds don’t have any hairline fractures and that your pipes and tanks don’t have fatigue cracks or leaks.

How does it work?

  1. A section of pipe or another industrial equipment is chosen.
  2. Penetrant dye is applied to the section.
  3. The surface is wiped clean.
  4. Developer chemical is applied
  5. All surface cracks will be visible as colored lines, because of the dye.

This technique can be applied with a spray bottle, by immersion or by brushing penetrant onto a surface. It can even be done with a reactive dye and ultraviolet light.

Ensuring Safety Without Disrupting Operations

This type of testing is done without causing harm to your equipment. Your facility will be able to operate, even while the inspection is taking place.

Let us help you keep your plant safe and secure with our non-destructive testing.