Composite repair system for corroded metallic pipelines: an overview of recent developments and modelling

Over the last few decades, polymeric composites have been increasingly used as repair material for corroded metallic pipelines, as it can restore the loading capacity and structural integrity of a damaged pipeline. Considerable researches have been carried out on the repair of corroded metallic pipes with fiber-reinforced polymer-based composites. Also, the repair methods have been continuously improving to reduce the time and cost, and increasing the safety and operational certainty. However, there are still many issues, problems, and challenges to be overcome for effective designs. Therefore, in this article, the main developments of the composite repair system components which influence the effectiveness of the composite repair of corroded pipelines were reviewed. The properties, role, and contributions of the fiber, matrix, and putty material on the composite-repaired pipe are briefly discussed. The analytical and numerical methods for failure analysis of composite repair systems were reviewed thoroughly. Composite repair thickness determined using analytical and numerical methods has been also discussed. Finally, in the conclusion section, the current challenges and opportunities are discussed to achieve a more effective design philosophy for the composite repair of metallic pipes.