Industry Survey of Past Failures, Pre-emptive Replacements and Reported Degradations for Mooring Systems of Floating Production Units

Abstract The results of an industry survey of mooring line failures are presented and analyzed. The failure data presented includes geographic location, mooring line composition, prevalent failure modes and the phase of failure inception. At a component level, cause of failure, location along the line and time to failure are presented. Failure data suggests that the observed increase in the number of failures is proportional to the increase of the FPSO population, with the underlying failure rate per mooring line approximately constant over the last ten years.