DIRECT ASSESSMENT-Conclusion: ECDA tunes Gasunie corrosion predictions

External corrosion direct assessment (ECDA) can serve as a powerful tool in determining not only the current but also the future health of a given pipeline system. Gasunie has developed software (PIMSlider) to aggregate ECDA data and allow increasingly accurate projections of line-failure probability.Part 1 of this article, presented last week, provided the overall integrity management (IM) context in which PIMSlider is being applied. This concluding part examines the direct examination and postassessment steps of the IM process in greater detail and provides an ECDA example from Gasunie’s own system.Direct examinationThe direct examination step evaluates all inspected ECDA regions ...

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