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Steel pipelines are increasingly essential for many applications, including the transport of oil, natural gas, and soon hydrogen gas. Steel pipelines are subject to harsh operating conditions. Corrosion is considered to be the most common type of failure in steel pipelines. This report focuses on corrosion and assessment in gas and oil pipelines. The most common method of repairing corroded pipelines by composite repair is included in the review. Based on conservative codes and deterministic and reliable FEM approaches, different tool designs and models of corroded pipelines without and with repair are summarized and compared. The evaluation of defects in determining the failure pressure of pipelines and the study of the contribution of composite wrap repair to corroded pipelines are discussed. • Review paper. • Failure pressure prediction of corroded pipelines. • Repairing corroded pipelines. • Composite wrap contribution based on synthetic and natural fibers. • Conservative codes, deterministic and reliability FEM design of corroded pipelines approaches. [ABSTRACT FROM AUTHOR]

In this paper, analytical and 3D numerical models are developed to investigate the mechanical behavior of sandwich pipe under internal pressure loading. The suggested models provide an exact solution for stresses, strains and displacement on the sandwich pipe, which is made of epoxy material for the core layer and reinforced materials with an alternate-ply for the skin layers. The aim of this analysis is to evaluate the potential applications of jute and pineapple leaf fiber (PALF) bio-fibers in order to replace glass synthetic fibers generally employed in sandwich pipes. In this subject, a failure analytical analysis was developed using TSAI-WU criterion. The results of stress, strain and displacement distribution through the thickness are presented for the analytical and numerical models. The comparison between the both models results show a very good agreement. In order to increase the rigidity of a biocomposite sandwich and reduce the gap compared with a synthetic sandwich, a gradual reinforcing of layer numbers was chosen, which permitted the best behavior. The ultimate pressure and safety factors obtained by increasing biocomposite layers are significant for composite transportation pressure pipelines, especially for sandwich pipe based on PALF/epoxy. • We aim at modeling a sandwich pipe under internal pressure loading using analytical and 3D numerical models for failure analysis. • The structure is a made of epoxy material for the core layer and reinforced materials with an alternate-ply for the skin layers. • Evaluate the potential applications of bio-fibers in order to replace synthetic fibers generally employed in sandwich pipes using TSAI-WU criterion. • Substituting synthetic fibers by bio-fibers yields a satisfactory result by increasing the number of layers. [ABSTRACT FROM AUTHOR]