Failure pressure analysis of pipe repaired by composite sleeve subjected to thermal and mechanical loadings

Abstract

During the lifetime of a corroded metallic pipe, it may be exposed to a wide range of temperatures (− 50–130 °C). This study deals with the impacts of temperature and moisture on the effectiveness of a composite sleeve applied to the damaged metallic pipe employing a theoretical methodology supported by FE simulations. For this purpose, a theoretical method has been developed to obtain the failure pressure, with the repaired pipe being under thermal loading as well as internal pressure. Then, the effects of various parameters on the burst pressure of the repaired pipe have been investigated. According to the findings, studying the impact of temperature on both GFRP and thermo-wrap composites employed to repair the metallic pipe suggests that the latter could be used in exposure to a high range of temperatures, as opposed to the former, with its strength being suitable for low-temperature applications. Investigating the partially bonded condition between components revealed that the surface preparation before applying the filler material is necessary unless a partially bonded sleeve could not remarkably restore the pipe strength.