Non Destructive Testing

Applied Inspection offer a comprehensive range of non destructive testing, engineering inspection and consultancy. Our laboratories are headed by experienced and knowledgeable personnel with the commitment to provide our customers with a Non Destructive Testing service second to none.

Our Non Destruction Testing Services include:

Non Destructive Testing Consultancy

ConsultancyLevel III

Our level III personnel carry out contracts for a wide range of small and large companies working to PCN, ASNT, ACCP and other accreditation schemes. Our client base spans the globe and covers industries, such as; pressure vessel manufacturers, energy; including petro-chemical and power generation, rail rolling stock and infra-structure, precision engineering and foundries.

The scope of Consultancy work we undertake involves;

Detailed below is a sample of the type of companies we provide a Consultancy service for;

  • Preparation of QA documentation to incorporate non-destructive testing activities
  • Auditing and cross-checking activities; ensuring processes and the application of various NDT techniques are in accordance with applicable specifications
  • Provision of third party assistance for evaluation of NDT procedures and inspection
  • Compilation of NDT procedures and techniques in accordance with a wide range of national and international codes, standards and specifications
  • Provision of training and certification of NDT personnel in accordance with American Society of Non-Destructive Testing document SNT-TC-1A

Major International Engineering, Procurement, Construction, Maintenance (EPCM) and Project Management Services Organisation

UK and on-site on Changxin Island, Shanghai, China – contracted as independent consultant to investigate the reason(s) why transverse cracks had not been detected in welds during the fabrication phase of monopiles and transition pieces for large offshore wind farm project in UK.

Global Leader in Marine and Energy Market

On-site at Astano Shipyard, Ferrol, Spain – contracted as independent consultant to review and evaluate over 2000 radiographs of high pressure pipework welds in dispute between client and sub-contractor / Lloyds Register.

Major Oil and Gas Operating Company in UK Sector of the North Sea

On-site in Northern Italy – contracted to review and evaluate sub-contractors proposal for the Ultrasonic examination of cast valve bodies made from Duplex material.

Major UK Manufacturer of Large Generators for Gas and Steam Turbines

UK assignment – appointment as ASNT NDT Level III certified consultant for Channel Tunnel Shuttle Train project to advise on specialist NDT requirements.

Large French Construction Company

On-site assignment in Bordeaux, France – compilation of inspection procedures, UT, RT (x & gamma), MT, PT, VT, Dimensional and Weld Inspection, for Pickerill Field Development, North Sea.

Major UK Forging Company

Contracted on-site in Sheffield, UK for Japanese client – independent witness, inspection and documentation review of aero engine turbine discs. UT immersion testing, mechanical testing and acid etch testing.

Hardness Testing

Hardness Surveys

Hardness SurveysThis can be carried out either in the laboratory or on site using portable equipment.

Determining the hardness of a material can give an excellent indication of the tensile strength.

Ultrasonic Axle Testing

Ultrasonic-Axle-TestingApplied Inspection is recognised throughout the UK and Europe as being at the forefront of testing on rail axles in accordance with Railway Group Standards. The testing we carry out is currently undertaken for companies at the manufacturing stage as well as insitu at the rail depot. We are also involved with routine maintenance schedules for a number of rail companies.

This type of testing is, of course, considered safety critical and as such, requires highly skilled and experienced technicians who work side by side rail company personnel on a daily basis.

We were recently invited by TWI (The Welding Institute) to take part in a European backed research project looking into the life of rail axles. Further details are available on our News page.

Should you require further information please contact  Roy Archer and Joseph Morgan on 01283 515163 or complete the enquiry form below.


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Rail Division

Rail DivisionOur dedicated rail division offers a comprehensive range of services carried out by highly qualified and experienced personnel who are all PTS and Safety Critical approved.

We also undertake complete project management.

  • GM/RT 2005 Approved
  • Fleet checks
  • Wheelsets
  • Procedure writing
  • Ultrasonic axle testing
  • Axle boxes – removal and fitting
  • Bogie frames


Applied Inspection is able to provide preparation, validation, development and approval of non-destructive test procedures as well as the provision of a complete technical support service.

Should you require further information please contact Roy Archer and Joseph Morgan on 01283 515163 or complete the enquiry form below.


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Outsourced NDT department

Outsourced NDT DepartmentHave you considered out-sourcing your non destructive testing?

If your company’s manufacturing processes require NDT and you feel this requirement is not allowing you to be as productive as you need to be in a highly competitive market place; you may wish to consider out-sourcing NDT entirely.

Applied Inspection work with a number of companies in this way, allowing them to concentrate on their core business activities – enabling them to remain profitable and competitive.

Making the decision to out-source your complete NDT requirement ensures;


  • Appropriately qualified staff on hand when you need them
  • Correct testing procedures are maintained
  • Staffing levels are adjusted depending on work-loads
  • Safety Training and Radiation Protection Supervisor (RPS)
  • Dosimetry requirements are adhered to
  • Radioactive Substances & Radiation legislative compliance is maintained
  • Reports and records are maintained for audit purposes
Visual Inspection

Visual Testing

Visual InspectionAlso known as Visual Inspection, Visual Testing is the one NDT method used extensively to evaluate the condition or the quality of a weld or component. It is easily carried out, inexpensive and usually doesn’t require special equipment.

It is used for the inspection of welds and other components where quick detection and the correction of flaws or process related problems can result in significant cost savings. Visual Testing is the primary evaluation method of many quality control programmes.

Visual InspectionThis method of testing requires good vision, good lighting and the expertise to recognize flaws and process problems. Visual inspection can be enhanced by a variety of methods ranging from low power magnifying glasses through to boroscopes. These devices can also be used with television camera systems. Surface preparation can range from wiping with a cloth to blast cleaning and treating with chemicals to show the surface details.

Visual Testing can identify where a failure is most likely to occur and as well as identifying when failure has commenced and this method of testing is often enhanced by other methods of inspection; identifying defects that are not easily seen by the eye.

Eddy Current Testing

Eddy Current TestingThis technique is used to detect surface and near surface defects on relatively small areas; without the need to remove surface paint prior to testing. The equipment is light and compact and provides immediate feedback, making it ideally suited for inspecting on site.

ET is an electromagnetic technique and can only be used on conductive materials. Its applications range from crack detection, to the rapid sorting of small components for flaws, size variations, or material variation. Commonly it is used in the aerospace, rail, automotive, marine and manufacturing industries.

When an energised coil is brought near to the surface of a metal component, eddy currents are induced into the specimen. These currents set-up magnetic field that tend to oppose the original magnetic field. The impedance of coil in close proximity to the specimen is affected by the presence of the induced eddy currents in the specimen.

When the eddy currents in the specimen are distorted by the presence of the flaws or material variations, the impedance in the coil is altered. This change is measured and displayed in a manner that indicates the type of flaw or material condition.


Dye Penetrant Inspection (DPI)

DPI---Dye Penetrant InspectWe offer Dye Penetrant Testing on site or in one of our laboratories using either fluorescent or colour contrast applications as a one off test or batches of machined parts. This type of testing is commonly used on welds, machined parts, castings and forgings.

Also known as Dye Penetrant Inspection (DPI), Liquid Penetrant Inspection (LPI) or Fluorescent Penetrant Inspection (FPI); it is a method that is used to reveal surface breaking flaws by bleed-out of a coloured or fluorescent dye from the flaw.

The technique is based on the ability of a liquid to be drawn into a “clean” surface breaking flaw by capillary action. After a period of penetration time, excess surface penetrant is removed and a developer applied. This ‘draws’ the penetrant from the flaw to reveal its presence. Colour contrast (or “visible”) penetrants require good white light, while fluorescent penetrants need to be used in darkened conditions with an ultraviolet light (also known as black light).

Penetrant inspection can be used on almost any non-porous material. It is essential that the material is carefully cleaned first; otherwise the penetrant will not be able to enter the defect. If surface penetrant is not fully removed, misleading indications will result.

With our capacity, capabilities and our collection and delivery service, we can assure you of a quality service with a fast turn around to assist you in achieving your production commitments.

MPI Inspection Testing

Magnetic Particle Inspection (MPI)

MPI – Magnetic Particle InspectionApplied Inspection offers a cost effective MPI service to a wide range of industries at highly competitive rates.

We are able to undertake MPI up to 3000 amps in our laboratories or on site – 24 hours a day, seven days a week. With over 90 full time staff, we are equipped to provide a rapid response and a fast turn around as well as a collection and delivery service.

Magnetic Particle Inspection is used on welds, castings and forged ferro-magnetic materials in order to detect cracks and flaws on the surface or very near to the surface.

There are several types of electrical currents used in MPI. For a proper current to be selected one needs to consider the part geometry, material, the type of discontinuity you’re looking for and how far the magnetic field needs to penetrate into the part.