Innovative solutions for reliable detection of pipeline cracks

The Problem

The successful and safe transportation of mediums through pipelines, operators must consider the threats posed by crack and crack-like anomalies in their assets. Inaccurate information regarding cracks can result in misguided action, or even pipeline failure.

Undetected cracks can be detrimental to pipelines and can often compromise a pipeline's integrity. Typically orientated axially, operators identify such flaws as a frequent origin of line failures. 

The Solution

NDT Global's range of ultrasonic inline inspection (ILI) robots accurately identify cracks in a pipeline. As part of an integrity management program, it is necessary for operators to have confidence in the robots inspecting their line to detect, size and locate such flaws before permanent damage occurs to an asset.

Our innovative Enhanced Sizing for UT crack inspections removes any depth sizing boundaries that previously existed for depths above 4 mm (0.16 in). By providing operators with the best data available, we help put them in a better position to manage their pipelines. 

The Principle explained

Evo Series 1.0 UC

NDT Global's Evo Series 1.0 UC crack inspection robots uses the 45˚ shear wave, a methodology employed industry-wide. Due to a so-called corner reflection produced by this method, minor cracks anywhere from approximately 1 mm (0.04 in) onwards give strong reflections for analysis.

Ultrasonic crack inspection enables early detection and sizing of cracks and crack-like irregularities. Such accurate information allows operators to take necessary measures to help avoid pipeline failures.

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Evo Series 1.0 UCc

Circumferential cracking defects can be addressed with ILI robots utilizing ultrasonic shear wave technology.

To accurately identify circumferential cracking, the diffracted shear wave signal travels in the pipe wall by an angle of 45° and is reflected either by an external or internal flaw. Based on the individual pattern of the reflected signal algorithms, experienced data analysts can read and translate the information into flaw properties, e.g. length, width, type and depth.

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Ultrasonic Crack Detection

All of our crack detection robots employ ultrasonic technology (UT), which offers a complete and in-depth analysis of a pipe wall. UT inspection is the most accurate and reliable ILI service available.


  • All work was performed in accordance with Statoil's specifications and to complete satisfaction. The data results were precise and reliable and perfectly reflected the pipeline conditions. During the last years NDT Global has been an excellent cooperation partner for us in every respect. Precision and reliability are the cornerstones of their work.


  • Thanks to the NDT Global Engineering 'A Team', and work by the Sunbury Flowlines team, a plan was conceived to put the pig on a diet.

    BP Angola

  • NDT Global showed a profound expertise and reliability. NDT Global impressed with their quality of service provided through their personnel as well as the outstanding performance of the inspection tool providing excellent data. The final reports were delivered in due time and with excellent quality. Based on this experience and the good business relationship, we are happy to recommend NDT Global for the inline inspection services.

    Open Grid Europe