Roles of flow, metal studied in UK corrosion failures

08/16/1999
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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