Non-Destructive Testing

Call us on 01761 410410 for a quotation or email us here

We are one of the leading Non-Destructive Testing (NDT) companies. Our services are extremely thorough and we provide individual and detailed reports for each NDT testing method. 

Our work typically addresses weld integrity for carbon steels, stainless steels, alloys, components, all structures and vessels. We work precisely to customer specifications and test raw materials as well as components - from large gas silos, bridges and staircases to small aerospace components, floor claddings, overlay build-up on corroded surfaces and hard facing build-up on digger buckets. 

Our NDT services include:

  • Visual Inspection (CSWIP and PCN)
  • Liquid Dye Penetrant Inspection
  • Portable Hardness Testing
  • Magnetic Particle Inspection
  • Ultrasonic Inspection 
  • Positive Material Identification (PMI)
  • Radiography (provided by approved sub-contractors)

In-house and on-site

Our Non-Destructive Testing services can be carried out in-house as well as at customers' sites, with our team of NDT technicians able to travel nationwide with all the equipment needed to carry out the required tests.

Visual Inspection 

Procedure

Visual inspection is a popular weld quality inspection method and is one of the most common Non-Destructive Testing (NDT) methods. It involves a visual testing of welds and is capable of detecting surface-breaking defects, as many welding flaws are on the surface and can easily be detected via this weld inspection procedure.

Visual inspection equipments and consumables enable the test to be carried out correctly. These include a digital camera, measuring rules and tapes, torch, markers, weld profile and undercut gauges, mirrors, borescopes and photometer. Complex equipments like fibre optic connectors can be used for close visual inspections, where the device is used to access small holes or channels.

Visual inspection reveals flaws that may or may not be detrimental to the quality of the weld. However, an inspector's aim should, at all times, be to find and report all significant flaws.

For effective visual inspection, an inspector needs perfect eye-sight along with specialist knowledge of the method, and as with any test method, visual inspection requires adequate training of personnel to ensure that it is performed by competent personnel who are familiar with the procedures and application standards.

How You Benefit

  • By enforcing quality control, you are demonstrating high standards in terms of quality and safety.
  • Access to our three decades of experience in NDT.
  • Early detection of welding defects- usually, visual inspection carried out by adequately trained inspectors can alone reveal most of the weld defects.
  • Highly effective- visual examination remains the most common and one of the most effective methods of inspection despite advancements in inspection technology. Although visual examinations involve surface-only checks, these checks are able to reveal the most damaging defects.
  • Compliance with legal and government regulations.
  • Our guarantee of quick turnaround times without having to compromise on accuracy.
  • Precise data acquisition carried out by our well-trained inspectors.

Ultrasonic Inspection

Procedure

Ultrasonic Testing (UT) or Ultrasonic Inspection (UI) is a popular method of Non Destructive Testing. This method is most commonly used for the following purposes: 

 

  • Thickness checking to check for laminations in parent material and to detect extremely minute flaws within welded joints.
  • Thickness checking example would be detect internal corrosion on service pipelines.
  • Lamination checking example would be parent materials are often checked prior to welding in case there are any defects present.
  • Welded join testing example would be when welded joints are in a butt weld or T-butt weld configuration, UT is carried out to examine the parent metal / heat effected zone and weld metal for any volumeric defects.

 

The procedure for UT involves putting the object being inspected in contact with an ultrasonic transducer connected to a diagnostic machine. This causes beams of mechanical waves (vibrations) of short wave length and high frequency to be transmitted through the object. These waves are then measured and compared with existing standards to verify the object being inspected.

The pulse waves, when able to transmit through an object, can reveal the thickness of the object as well as any internal imperfections.  

How You Benefit

  • By enforcing quality control, you are demonstrating high standards in terms of quality and safety.
  • UT’s deeper penetration for flaw detection or measurement makes it superior to other NDT methods.
  • You only need access from one side when using the pulse-echo technique.
  • Minimal preparation or set-up time is required before carrying out the examination.
  • The electronic equipment provides instantaneous results.
  • Our three decades of experience in NDT.    
  • Compliance with legal and government regulations.
  • This procedure can be used for thickness measurement, flaw detection as well as other purposes.
  • Our guarantee of quick turnaround times without having to compromise on accuracy.

Limitations:

Ultrasonic Testing is not the quickest NDT method, because you are trying to inspect something that you cannot see internally, and with all the various calibration checks and all the various probes to be used, it takes a lot longer than MPI for instance.

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