Back to Companies


Globally acclaimed manufacturer of Non-Destructive Testing (NDT) and Evaluation (NDE) flawed specimens.

NDT Manufacturer

United Kingdom

Visit Website

Globally acclaimed manufacturer of Non-Destructive Testing (NDT) and Evaluation (NDE) flawed specimens.

Sonaspection works with multinational organizations worldwide, constantly facing requirements and challenges that push them to create new standards and improve the reliability of the industry.

Founded in 1980 and acquired by the Institution of Mechanical Engineers in 2013, Sonaspection has manufactured thousands of flawed specimens for many of the major performance demonstration, training and qualification centers around the world.

With offices in Charlotte, USA, and Lancaster, UK, Sonaspection pride themselves in pioneering many ‘industry standard’ flaw manufacture and implanting techniques.

Our flawed specimens can be found in any reputable organization across a multitude of sectors, including petrochemical, nuclear, aerospace and shipbuilding, providing training and certification of technicians, as well as procedure and equipment development, in non-destructive evaluation.

This, combined with their first-class workmanship, specialized welding and non-destructive evaluation skills, means our promise to you is that your business will receive the best quality and most accurate flawed specimens on the market.

Products & Services
Flawed Pipeline Spools for In-Line Inspection (ILI)

Validation and calibration spools for ILI performance verification.

Our bespoke validation and calibration spools are designed to help you gain a comprehensive understanding of your ILI results, increasing the probability of flaw detection and accuracy.

We manufacture spools of up to 30ft in length, with flaws connected to the OD, ID or mid-wall. These can all be positioned within the electric resistance welded (ERW) seam, parent material or circumferential welds.

We offer a large variety of flaw types in any geometry and will work with you closely to determine the type, size, and location of flaws required to be implanted within the spool.  We work hard to ensure we meet your project requirements related to your integrity management objectives to the highest standard.

Recommended for

  • Validation of equipment capability
  • Training operators for field experience


  • Eddy current array (ECA)
  • Phased array (PA)
  • Time of flight diffraction (TOFD)


  • Carbon Steel

Typical flaws

  • Hook cracks
  • Penetrators
  • Electric discharge machining (EDM) notches
  • Crack fields (zero weld material)
  • Pitting and pinholes
  • Corrosion – light, gross and riverbed
  • Erosion – grooving and riverbed
  • High-low area with associated cracking
  • Grinding with associated cracking
  • Dents with associated cracking
Corrosion & Erosion

The inspection and management of corrosion and erosion is one of the major lasting issues facing pre and in-service inspection.

New testing methods such as Corrosion Under Insulation (CUI) and UT Corrosion Mapping alongside developments in equipment are providing the necessary knowledge and tools to address the estimated $2.2 trillion annual cost.

Sonaspection are able to support the development of expertise in corrosion and erosion with real flaws in the following specifications in pipe and plate specimens:

  • Erosion
  • Corrosion
  • Pitting

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.