Dynamic Response Spectroscopy (DRS)

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Threats and Integrity Management -- Anomaly Detection and Characterization

The Dynamic Response Spectroscopy (DRS) is an ultrasonic inspection technique for corrosion mapping through challenging coatings, such as composite wraps, where existing ultrasonic techniques are ineffective. This technique has been designed to look through the composite repairs to measure the remaining wall thickness of the underlying metallic pipe. The DRS probe excites the steel pipe with a range of low ultrasonic frequencies, which pass easily through the coating/wrap. Using advanced algorithms, these frequencies are extracted from the returning signal at each location and used to determine the steel thickness.

Inspection of pipework through composite repair wraps will provide the pipeline operators with accurate data related to the current status of the depth of the defect below the composite repair.

Greater Reliability - The measurements increase the quality control and assurance of pipe repairs using composite wraps. Measurement of the actual defect size will enable in service integrity assessment of the repaired pipework, especially beneficial for long lifetime repairs where internal corrosion is present.

http://www.sonomatic.com/advanced-inspection/applications/pipelines/