Low Frequency Electromagnetic Technique (LFET)

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Threats and Integrity Management -- Anomaly Detection and Characterization

The Low Frequency Electromagnetic Technique (LFET) is used to detect anomalies in above-ground, uninsulated piping. The piping can be painted or coated. The system rapidly scans areas of piping to achieve greater than 90% coverage. It is used as a quantitative tool or as a rapid screening tool. In the screening mode, an A-Scan ultrasonic is used to prove-up any flaw indications. This technology is applicable to magnetic and non-magnetic piping. Cast iron or other cast materials can also be tested.

Various R&D efforts have been undertaken to evaluate various electromagnetic technologies. Although implementing this technology requires access to the pipe in excavated sections, it provides a rapid and reliable process for t=detecting anomalies on the pipe surface.

Increased Safety - Increase Safety – Increase reliability: The technology provides a reliable direct-contact technology for accessing anomalies on pipe sections where initial indications prompted excavation to inspect the pipe. The device provides a stand-alone inspection which increases reliability of the pipe surface evaluation.

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