New method uses conformable array to map external pipeline corrosion

Al Crouch, Todd Goyen, Patrick PorterDevelopment and testing have been completed on a method for measuring external corrosion on steel pipelines using a conformable eddy-current array.The method, developed by Southwest Research Institute, San Antonio, uses a flexible printed circuit board with pairs of sensing coils and electronic components that energize the coils and process their signals.Software produces a contour map of the corrosion, which identifies the depth and location of the deepest pit and calculates the maximum safe operating pressure.The US Department of Energy through the National Energy Technology Laboratory funded feasibility testing and design by. Clock Spring Co. LP, Ho...

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