Cased pipeline construction creates operational challenges for cathodically protecting and assessing the condition of the carrier pipe inside a casing. Filling the annular space between the casing and carrier pipe is a method commonly used to control corrosion on the exterior surface of the carrier pipe in a casing. Case studies of the assessment of filled casings using Inline Inspection (ILI) and Direct Assessment (DA) will be presented to evaluate the effectiveness of filling casings to control corrosion.

Subject
Carrier pipes, Coating inspection, Water, Materials, Piping, Walls, Pipelines, Inspection, Installation, Metal loss, Anomalies, Coal tar, Direct assessment
Keywords:
Casing, Fill, Direct Assessment, carrier pipe, annular space
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2013
Association for Materials Protection and Performance (AMPP)
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