Dye Penetrant Inspection

Your assets need to be maintained according to the highest safety standards. We support you in achieving your industry’s compliance requirements through our thorough, agile testing services. We deliver assurance, answering every question with straightforward honesty. If you need further information about any of our services, please do not hesitate in contacting our multi-disciplinary team.

To ensure that your operation continues to work as smoothly as possible, we are able to offer Dye Penetrant Inspection in-house at our unit in Deeside, as well as on-site.

What is Dye Penetrant Inspection?

Our Dye Penetrant Inspection (DPI) service is used to detect surface-breaking defects. A dye is used to highlight surface cracks and then measured under different light sources.  It is a fast, low-cost method of testing.

Generally, it is used on non-ferromagnetic materials or materials that are not magnetic and contain no iron. Occasionally, our technicians use this method with ferromagnetic materials, but more normally our team would opt to use magnetic particle inspection in these circumstances.

What is DPI used to detect?

DPI is normally used to test shafts, castings, and welds, along with machined small components. It is a portable and relatively simple method of testing surface-breaking defects and surface porosity. It is also used to defect toe cracks and crater cracks.

What limitations does DPI have?

This method of non-destructive testing can only detect surface-breaking defects and requires a clean surface before the inspection can take place. It is temperature-dependent, which makes it unsuitable for low temperatures.

Think you might need Dye Penetrant Inspection services?

If you need our Dye Penetrant Inspection services, contact us now for more information. We are looking forward to hearing from you.

When to use this service

  • task_altFor storage tanks, pressure vessels, and small metal components.
  • task_altFor welds, structural steel welds, and welds in high pressure environments.
  • task_altFor shafts and machined small components.
  • task_altFor heat exchangers and boilers.

Responsive testing that delivers assurance that your equipment is safe.

Contact us for a quality testing service with a fast report turnaround. We can respond to any challenge.


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