NDT Global uses state-of-the-art computational assessment methods, so-called Level 3 assessments, including Finite Element Analysis (FEA). These assessments provide precise predictions of the failure pressure of anomalies.

Conventional assessment methods are widely used and accepted, despite their well-known conservative results leading to decreased throughput and unnecessary pipeline repairs. Although these methodologies have been refined, assessing the severity of defects by simplified rectangular boxes (peak depth, maximum length) or depth profiles yields conservative predictions for the maximum allowable safe working pressure.

FEA is based on the actual 3D geometry of the damaged pipe (anomaly + pipe joint) and can account for specific material properties, if available. In this way, FEA reduces the degree of conservatism and helps avoid costly excavations and repairs in difficult to access locations. FEA is also well suited to assess combined anomalies (e.g. dents with cracks or dents with metal loss) which is not possible with standard assessment methods.

Metal loss anomalies and crack-like flaws can be reliably detected and sized by high-resolution ILI robots. NDT Global’s Ultrasonic Geometry (UG) technology provides the detailed geometry of pipe joints (e.g. out of roundness) and deformations. Combining detailed information yields an ideal input for an accurate 3D modelling and FEA assessment. Results of Level 3 assessments, based on a non-linear FEA have shown the most accurate estimation of the pipeline failure pressure, providing the highest benefit to the pipeline operator

Our Technology

We use the most accurate and innovative ultrasonic technology on the market to inspect your pipelines to provide value that you can put back into your Integrity Management Program, all while keeping in mind our common goals: pipeline integrity, cost reduction and protecting the environment