Abstract

Survey and inspection campaigns are important inputs in the Asset Integrity Management System (AIM) of FPSOs and other floating offshore facilities. Considering that the unit shall stay at site during the whole life of the field where the disconnection or the removal of the mooring system are not planned, a comprehensive methodology for the survey and inspection of the unit during this period shall be provided and subject to review based on the results of the scheduled inspections. So further than subjected to class and statutory requirements, inspection and survey plans shall reflect the required availability and durability of the unit regarding the field life. Among the several degradation mechanisms covered by the inspection and survey plans, fatigue is an important issue to check carefully. Risk Based Inspection Methodology has been adopted in several projects and is an important tool to establish rational inspection campaign for structural components, mainly for those located in areas where access is critical and operational constraints are an important parameter. The aim of this paper is to present the methodology to establish inspection and survey plans, combining RBI analysis and the industry expertise. The several steps to achieve the final inspection campaign are described based on the experience on new-built but also converted FPSOs.

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