PIPELINE INSPECTION- Conclusion: ILI tool detects cracks, SCC in Canadian liquids line

In September 1997, Enbridge Pipelines Inc. initiated a crack-detection program on the 283 km, Cromer-to-Gretna, Man., section of Enbridge's Line 3. Its purpose was to assess the integrity of this section and identify anomalies that might affect future operation of the pipeline.A second objective was to evaluate the performance of a Pipetronix (now PII) Ultrascan CD in-line inspection tool and determine its potential role in Enbridge's integrity program. Part 1 (OGJ, Apr. 30, p. 64) of this two-part series discussed a similar inspection program in a 36-in. section of TransCanada PipeLines Ltd.'s natural gas system.Enbridge's program led to 29 excavations based upon the data...

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