Evaluación de la aptitud para el servicio de una tubería con corrosión por picadura mediante la aplicación de la norma API 579-1/ASME FFS-1 (fitness for service), apartado 6.

Abstract

This degree project proposes the evaluation of the structural integrity of a pipeline affected by pitting corrosion, applying the level-based methodology described in the API 579-1/ASME FFS-1 (Fitness-For-Service), Part 6. The main objective is to determine whether the pipeline can continue operating safely, based on a progressive analysis that includes simplified criteria (Level 1), detailed analytical methods (Level 2), as well as advanced finite element simulations (Level 3). These levels are progressive; that is, as the level increases, the amount of information collected for analysis also increases. This allows for greater clarity in determining whether the pipeline, considering the defect it presents, is capable of continuing operation or, conversely, whether under normal conditions its use is no longer viable. Based on the standard, it is possible to obtain data that guide changes in operating conditions or confirm severe damage that prevents continued service. The results obtained provide a technical basis for decision-making. This project validates the applicability of the API 579 standard in real cases of pitting corrosion and contributes to the optimization of integrity management in pipeline systems, reducing operational costs and mitigating failure risks.