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Numerical Study on the Effect of Defect Length upon Burst Capacity of Composite Repaired Pipe

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Abstract:

Pipeline system is one of the essential infrastructures in oil and gas industries as it is used to transport oil and gas over long distance. However, pipelines will undergo damages and deteriorations after being used for some years, especially when corrosion occurs. Corrosive pipes will experience reduction in wall thickness resulted a lower remaining strength of the pipe, and consequently lead to failure once the remaining strength unable to withstand the desired operating pressure of the pipe. Therefore, additional strength from repairing job needs to be provided, for instance, by using fibre-reinforced polymer (FRP) composites. Unlike the corroded pipeline assessment codes, the pipeline repair codes that are used to design composite repair system of corroded pipe do not include the defect geometries such as defect length. In this study, burst pressure of the composite repaired pipeline with different defect lengths and the effect of the defect length upon the burst capacity of composite repaired pipe are investigated. The study is carried out by finite element analysis on various defective pipes with different defect length sizes. The results show that the difference of the burst pressure subjected to various defect lengths is 15.59% and this had proved that there is effect of defect length upon the burst capacity of composite repaired pipe. This finding can be very useful for optimizing the existing repair design.

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Info:

Periodical:

Key Engineering Materials (Volume 879)

Pages:

179-188

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.879.179

Citation:

Cite this paper

Online since:

March 2021

Authors:

Kah Qi Lim, Chao Bao, Mohd Syahrul Hisyam Mohd Sani, Lim Kar Sing*

Keywords:

Composite Repair, Defect Geometry, Defect Length, Finite Element Analysis, Optimization, Pipeline

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* - Corresponding Author

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