Method for calculating corrosion allowance for deepwater pipelines and risers

摘要

ESTIMATING a corrosion allowance for deepwater risers is an essential part of their design. Sufficient additional wall thickness must be provided to resist corrosion under realistic conditions of corrosion, with sufficient contingency to cover system upsets and failure to deliver sufficient corrosion inhibitor to the flowline to prevent corrosion. A new procedure is used to estimate wall thickness requirements for, risers based on the availability of corrosion inhibitor in sufficient concentration to produce low inhibited corrosion rates. Application to deepwater risers is discussed.