Traditionally, corroded pipelines with metal loss defects have been repaired by replacing the defective areas with metallic pipe segments or by welding on metallic sleeves. Considering the technical and economic advantages of composite materials, literature shows that these defects can be repaired or reinforced with a composite sleeve system. In these systems, epoxy filler is used to fill the corrosion defect followed by wrapping the piping segment with concentric coils of composite material. However several challenges need to be met to obtain the desired repair quality. The major considerations are surface preparation, reduction in operating pressure for the repair, the duration required (e.g. for curing of the composite material) for the composite repair to share the load from the pipe, and the most important is the in-field quality assessment and to ensure consistency between several repairs. In this work, a numerical model is developed to investigate the performance of composite repair systems and compare with the traditional metallic welded sleeve. The effect of fiber orientation, repair sleeve thickness, material and installation pressure have been studied. Results show the potential of composite repair system in replacing the existing welded metallic non-pressure containing sleeve for metallic pipelines.

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