Methods of determining the coating quality on directionally drilled pipe sections were investigated in a research project sponsored by the Pipeline Research Committee of the American Gas Association. Tests were conducted on FBE coated pipe samples which were buried in three different soil conditions and equipped with steel strip coupons to simulate coating damage. A field test procedure, which can be performed by a CP technician, was developed that estimates coating quality in terms of percentage bare.

Subject
Electric current, Test methods, Pipe surfaces, Piping, Cathodic current, Reference electrodes, Soil resistivity, Pipe sections, Attenuation, Corrosion coupons, Polarized potential, Soil, Samples
Keywords:
directionally drilled pipe, coating quality, test method, coating conductance, current requirements
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2000
Association for Materials Protection and Performance (AMPP)
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