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The Evolution of Ultrasonic In-Line Inspection
The main task of in-line inspection (ILI) is the early detection of potentially hazardous pipeline anomalies (e.g. metal loss) and precise sizing thus providing reliable input data for integrity assessment. For the inspection of liquid pipelines ultrasonic tools offer specific advantages with regard to resolution and measurement accuracy.
In-line inspection by means of intelligent pigging has become a standard application to ensure the safe operation of pipelines worldwide. Ultrasonic inspection tools have proven very successful for crack inspection as well as for metal loss inspection of liquid pipelines.