Composites repair corroded offshore drain pipe

Composite materials, primarily carbon fiber and epoxy resin, that are lightweight, yet offer a high-degree of strength and durability provided a way to repair corroded piping on two North Sea platforms without having to shut in production. Inspections found both internal and external corrosion in the closed-drain system on two North Sea platforms (Fig. 1).Click here to enlarge imageBP PLC during routine nondestructive testing on its Lomond and North Everest platforms found the closed-drain systems to have internal corrosion along 2-in. carbon steel pipes. Girth weld locations were the most affected areas, 15 sites in total, although two flange connectors and an isolation valve (Fig. 1) a...

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