Back to Companies

NDT Group

NDT Groups vision is to be a provider of an outstanding non-destructive testing service around the world.


United Kingdom

Visit Website

Our vision is to be a provider of an outstanding non-destructive testing service around the world.

But at heart, we are all about family. We care deeply about our team, our local area, and our community. Our values come from a deep-seated sense of local pride, and a desire to provide meaningful employment and opportunities for our people in our area.

Products & Services

Our team has years of experience in the field of NDT and is able to deliver the assurance you need that your assets are up to your industry’s highest standards of safety and compliance. 

To help you maintain productivity, our magnetic particle inspection services can be conducted in-house in certain circumstances. Do not hesitate to contact us if you have any queries about any of our services. We aim for a fast turnaround on reporting, providing you with a refreshingly agile NDT service.

What is Magnetic Particle Inspection?

Magnetic Particle Inspection (or MPI) is used to detect surface defects in ferromagnetic (or magnetic) materials. A magnetic field is generated inside the component and a magnetic particle powder is applied. The magnetic flux leaks through any defects and attracts the particles, highlighting any defects.

What is MPI used to detect?

MPI is normally used to detect defects in surfaces, such as toe cracks and crater cracks. It also allows the identification of areas of porosity. It is a portable, simple method for use on castings, shafts, and welds. It gives instant results and can detect defects up to 2mm below the surface.

What limitations does MPI have?

This method requires surfaces to be clean before testing commences. It also can require a power source and uses flammable liquids, so might not be suitable for certain areas on-site. MPI cannot be used on non-ferromagnetic materials.

Think you may need Magnetic Particle Inspection?

If you are interested in finding out more about our Magnetic Particle Inspection services, contact us now for more information. We are looking forward to hearing from you. No question is too obscure, and we aim to answer you with straightforward honesty every time.

When to use this service

  • For storage tanks and pressure vessels.
  • For pipework.
  • For forgings, castings and shafts.
  • For welds, and welds in structural steel and high pressure environments.
  • For structural steel.
  • For heat exchangers and boilers.

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

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

Step 1 - please enter your Personal details.

Step 2 - please upload your Resume.

Thank you for submitting.

Tree PNG back


Tree PNG back




Tree PNG back


Application Notes


onestop ndt application

NDT Trends #83 is out!!
Grab your FREE copy now.