A comparative internal corrosion direct assessment methodology for flowlines, termed 'C-ICDA', is introduced. Under the C-ICDA, factors influencing corrosion in a flowline are assessed to determine a comparative corrosion severity rating. Assessment of multiple lines in a field results in a ranking of flowlines by corrosion severity. A subset of lines is inspected to validate the ranking of corrosion ratings and calibrate the ratings to measured wall loss.

The flowlines in a 25 year-old oil production field are examined using the C-ICDA methodology. The results show that severe internal corrosion in these lines is the result of ineffective water transport during past operation.

Subject
Corrosion severity, Costs, Corrosion failures, Water, Walls, Solids, Inspection, Corrosion assessment, Flowlines, Corrosion losses, Internal corrosion, Internal corrosion direct assessment, Oil
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2004
Association for Materials Protection and Performance (AMPP)
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