Experts in
Non-Destructive Testing

NDT Group offers a wide range of Non-Destructive Testing Services on a global scale. We work within a diverse
set of industries ranging from oil & gas, petrochemical and nuclear just to name a few.


(+44) 1244 629559



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Unit 2 Holland Park, Factory Road, Sandycroft, Deeside, Flintshire, CH5 2QJ

We are a global supplier of NDT Testing, Inspection and Support Services.

NDT Group is a global supplier of NDT Inspections, offering both conventional and specialist NDT examinations along with a variety of support and consultancy services. NDT Group has a strong reputation for balancing global excellence with local  delivery within the NDT market. We are always pleased to discuss your enquiry and to visit the site when necessary to find the best way to meet your inspection requirements.

NDT Group has a Quality Management System accredited to ISO 9001 2015, meaning we constantly meet Customer Requirements which leads to Satisfaction in our Services.

What is Non-Destructive Testing?

Non-Destructive Testing is quite simply a means of assessing the structural integrity or properties of structures or materials without damaging them, although some techniques do require surface coatings to be removed.

The term applies to a range of methods from a straightforward visual inspection, Magnetic Particle inspection, Liquid Penetrant inspection, to more complicated disciplines such as Eddy Current or Ultrasonic Testing. The various techniques are designed to complement each other to provide the client with complete reassurance of product inspection coverage.

The critical importance to all NDT techniques is the ability (of the technician) to interpret the results generated and to understand where they fit into an assessment of the integrity of the structure as a whole. This only comes with experience and is an area in which our track record speaks for itself.

Our expertise across many sectors means we have strong relationships and alliances with our diverse supply chain partners.

This enables us to access the most advanced technological systems and processes in line with customer requirements. Across all markets, safety and business sustainability are cornerstones of our activities. NDT Group is a leading provider of inspection and management services to complex projects. Our workforce has a significant track record in assisting customers to improve the availability, reliability and cost effectiveness of their assets. 

Our Services

Ultrasonic Testing (UT)

One of the most widely used methods of inspecting weldments is ultrasonic inspection. Ultrasonic inspections can be conducted on a wide variety of material forms including castings, forgings, welds, and composites. Ultrasonic thickness inspection is routinely utilized in industries to determine various degrees of corrosion/erosion.

Phased Array (PA)

Phased Array (PAUT) is an Advanced Ultrasonic technique for flaw detection, sizing and imaging. A single PA probe is made up of many individual elements that can be fired in a certain sequence to produce a certain sound wave. Phased array uses the same physics of conventional ultrasonic’s but it is able to perform many scans from one probe to produce an image. The Inspections can be carried out on but not limited to Welds, Nozzles and Bolts. Corrosion Mapping can also be completed using the PAUT technique.

Time-Of-Flight Diffraction (TOFD)

As well as manual UT and PAUT, NDT Group also offers Time of Flight Diffraction (ToFD). The ToFD technique differs from other ultrasonic methods in that detection and sizing are principally based on imaging of diffracted wave fronts. ToFD can be used independently or in conjunction with other ultrasonic techniques such as ToFD and PAUT in order to cover the root and cap regions of a weld during inspection.

Dye Penetration Inspection (DPI)

Dye penetrant inspection (DPI), is a widely applied inspection method used to locate surface-breaking defects in all non-porous materials (metals, plastics, or ceramics). DPI is used to detect surface defects such as hairline cracks, surface porosity, leaks in new products, and fatigue cracks on components and welds. The DPI inspection requires that the area to be tested must be free of paint, debris and any coatings.

Magnetic Particle Inspection (MPI)

Magnetic particle Inspection (MPI) is a non-destructive testing process for detecting surface and slightly subsurface discontinuities in ferromagnetic materials such as Carbon Steel, Iron and Nickel. The process works by putting a magnetic field into the weld or component. Like the DPI examination the inspection area must be free of paint, debris and any coatings.

Visual Inspections

Visual Inspections can be the most basic and common inspection method in NDT, but this doesn’t mean they are any less important. NDT Group can supply Robotic crawlers, Boroscope Systems and UAV Inspections (Unmanned Air Vehicle Inspection) in hazardous or tight areas, such as air ducts, reactors, pipelines and storage tanks.

PMI Inspections

Positive Material Identification (PMI) provides alloy chemistry and grade ID information instantly using a handheld tube-based analyzer without having to transport, alter, or damage the material. PMI is also used to ensure that the parent material in vessels and pipe spools is composed of the correct composition (i.e.304 or 316) and once the component is welded that the correct filler material was used.

Eddy Current Welds Inspections

Similar to the MPI inspections the Eddy Current Welds inspection can detect surface breaking defects without removal of the paint on magnetic material and has the ability to test areas with poor access.

Tube Inspections

Internal rotary inspection system (IRIS) is an ultrasonic NDT technique. The IRIS probe is inserted into a tube that is flooded with water, and the probe is pulled out slowly as the data is displayed and recorded. The inspections are are commonly used for inspecting boilers, heat exchangers, and fin-fan tubes.

Eddy Current is a NDT method for inspection of non-ferrous tubes. The tube inspections are often used to detect corrosion, erosion, cracking and other changes in tubing on steam generators, condensers and heat exchangers. The Eddy Current examinations do not require water for the inspections like the IRIS method.

Industrial Radiography

Industrial radiography is used as a method of NDT on many types of manufactured components and  welds. Radiography can be used to examine and verify the internal structure and integrity of the component or weld utilizing either X-rays or gamma rays. NDT Group offers both film, and digital (CR/DR) Radiography Inspections.

Tank Inspections

NDT Group offers experience in tank inspection on shells, floors, roofs, welds, nozzles and post repairs. Using both conventional and advanced inspections NDT Group will provide you with a clear and concise report on the condition of your tank.

EEMUA 159 Inspections

NDT Group offers EEMUA 159 inspection packages for above ground flat bottomed storage tanks. With over 10 years’ experience in the procedure we can produce a package to meet your budget from supporting you with the NDT inspections as well as a completed Written Scheme of Examination right up to a Fitness for Purpose Report detailing the estimated remaining life of your assets.

PEC Inspections

Pulsed Eddy Current (PEC) is an advanced electromagnetic inspection technology used in detecting flaws and corrosion in ferrous materials typically hidden under layers of coating, fireproofing, or insulation.

Offshore & GWO Support

NDT Group offer inspections in both the Offshore and Renewables industries and has experienced and qualified technicians that can offer, but not limited to Conventional NDT Services, Advanced NDT Services and Rope Access Inspections.

Rope Access Inspections & Rescue Teams

Difficult to reach inspection areas, why not use Rope Access? NDT Group has IRATA (Industrial Rope Access Trade Association) Level 1 and Level 3 technicians available to meet our client’s requirements whether in NDT or Maintenance.

We are not all about the inspections! With our alliance with independent rescue specialists NDT Group can also provide Rescue Teams to support on any project, even if NDT inspections are not required. Safety for both our staff and your staff is paramount in the industries we work in and we will work with our clients to evaluate their project needs.

NDT Consultancy & Level 3 Services

NDT Group offer Level 3 and NDT consultancy services to support business’s with their NDT requirements. Whether you require general advice on any aspect of NDT, Supervision of personnel and procedures, Auditing, procedure writing and review or finding solutions to a particular issue please feel free to contact us to find out how we can support.

Sectors we operate in


Oil and Gas

Renewable Energy







(+44) 1244 629559


Unit 2 Holland Park, Factory Road, Sandycroft,
Deeside, Flintshire, CH5 2QJZ

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