Internal corrosion has caused ADNOC to suffer loss of containment in oil flowlines in a giant onshore field. The desire to eliminate this problem and the need to determine specifications and an accurate future flowline integrity management plan for the field led to a field trial application of grooved and flangeless high-density polyethylene (HDPE) liner technology in carbon steel pipe. This paper describes the successful 5-year field trial program and its confirmation that HDPE liner application in carbon steel pipe can be a cost-efficient way to mitigate internal corrosion in oil flowlines by isolating the metallic pipe from the corrosive fluid. The technology has resulted in cost efficiency in managing oil flowline internal corrosion.
Introduction
Flowlines are designed to last for a service life of more than 20 years in ADNOC. This is important for business continuity and reduction of operating cost.
