Post on 18-Feb-2018
7/23/2019 Fitness for Service Level 3 Assessment – CorrosionErosion
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Case StudyFitness for Service Level 3 Assessment – Corrosion/Erosion
Project Scope
> Definition of safe working pressure envelope forcorroded/eroded piping system based on highdefinition NDT scan data
Key Features
> Mapping of wall thickness data provided by
the operator’s inspection service contractor tostructural model
> By using a linearisation approach the currentutilisation factors were quantified to determine
the maximum line pressure that could behandled.
> Reduction in conservatism by using actual
mapped data rather than a simplified (worstcase) profile
> Forward prediction also undertaken todetermine change in wall loss over time and
associated change in utilisation factor