Roles of flow, metal studied in UK corrosion failures

Construction progresses in 1989 on the original Wytch Farm oil field lines.Click here to enlarge imageFailures on pipelines in the Wytch Farm, U.K., crude-oil gathering system in 1997 provided the opportunity to study the separate influences of flow and metallurgy on corrosion.High-quality inspection data, comprehensive as-built records, and stable production conditions came together to afford the chance. The flow regimes in the pipeline ranged from low-velocity, stratified flow to high-velocity, slug flow.The inspection data showed that turbulent flow increases the frequency of corrosion pits and, for weld corrosion, the mean corrosion rate.The pipeline consists of two grades of steel ...

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