PIPELINE INSPECTION—1: Reliability-based method assesses corroding pipelines

In the last two decades, results obtained from structural reliability analysis (SRA) have increasingly led to formation of strategies for future safe operation of corroding oil and gas pipelines.1-8 A safe operating strategy includes determining optimal reinspection intervals, scheduling rerating, reducing corrosion rate, and repairing or replacing pipeline sections when unavoidable.Use of probabilistic approaches to evaluate the integrity of corroding pipelines is beneficial because the uncertainties associated with in-line-inspection (ILI) tools, corrosion rate, pipeline geometry, material properties, and operating pressure can be modeled and considered over any chosen time period.3 4 7...

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