Magnetic Tomography method for inspecting pipelines (MTM)

Commercial Product

Transkor Group Inc. More »

Threats and Integrity Management -- Anomaly Detection and Characterization

This NDA technology is an external above ground inspection method for pipeline anomalies. It consists of applying a magnetic field as an operator walks along the pipeline axis with magnetometer. Diagrams of the Stress-Deformed Conditions (SDC) are analyzed to identify the anomalies.

National Grid completed a project to evaluate the MTM for pipeline inspection. During 2011 and 2012, the MTM system was tested on 13 sections of pipe on the National Grid transmission system. Analysis of the results showed that the MTM system has the ability to locate anomalies in a buried pipeline. Comparison of the MTM data with ILI results has shown that there is a good correlation between anomalies detected by both systems. The trials also included two pipelines where existing strain gauges were fitted to evaluate ground movement with respect to mining activities. A comparison between the strain gauge measurements and the MTM data showed a correlation between the estimated stress in the stress concentration zones and the stress recorded by the strain gauges.

Increased Safety - This technology enhances safety, reliability and damage prevention by providing a tool for inspecting anomalies from aboveground.

Greater Reliability -

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http://www.smarternetworks.org/Project.aspx?ProjectID=1388