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Abstract |
REPEATED IN-LINE inspections (ILI) of transmission pipelines have been used for many years to estimate corrosion rates. However, the calculation of a corrosion rate from a direct comparison of ILI anomalies is often contaminated with ILI measurement errors. An alternative to assessing a corrosion rate may be to use repeated ILIs to detect the presence of active corrosion by examining various statistical properties of the data. These statistics do not estimate corrosion rate, but they can indicate the presence of active corrosion. Once the active corrosion has been identified, the operator is then able to address each location. |
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