EFFECT OF PUTTY PROPERTIES IN REPAIRING CORRODED PIPELINE: A FINITE ELEMENT ANALYSIS

Authors

  • Muhammad Haziq Abdul Jalil Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
  • Alireza Valipour Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
  • Lim Kar Sing Faculty of Civil Engineering and Earth Resources, Universiti Malaysia Pahang, Lebuhraya Tun Razak, Gambang, Kuantan, Pahang 26300, Malaysia
  • Siti Nur Afifah Azraai Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
  • Libriati Zardasti Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
  • Nordin Yahaya Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
  • N.M. Noor N.M. Noor Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia

DOI:

https://doi.org/10.11113/mjce.v28.15997

Keywords:

Composite repair, geometrical defect, infill properties, pipeline.

Abstract

Underground pipelines are the most preferable way to transport oil and gas over a long distance. These steel pipelines often suffered from several deteriorations including corrosion. Corrosion causes the outer lining of a pipeline to thin and subsequently reducing pipeline strength. In order to prevent this loss of strength, repair is required. Composite wrap repair is a technique that can be used to repair damage pipeline. Composite wrap repair consist of Fibre Reinforced Polymer (FRP) composite wrap and putty as infill material to restore the strength of a damaged steel pipe. Recently, there is tendency in reducing the usage of composite wrapping layer due to several reasons. Ultimately, it is hoped that one day the repair can be done without composite wrapping. Thus, the purpose of this research is to explore the potential of using putty alone as a repair material in repairing corroded pipeline without composite wrap via finite element analysis. Difference geometrical defects that simulating external corrosion were investigated to study the influence of defect sizes towards the burst pressure of corroded pipeline. Two infill materials which both have difference mechanical properties are used in this research to investigate their influence towards the performance of the repaired pipes. Finite element analysis has been conducted to determine the behaviour of the defected pipeline with a patch of the infill covered the defected area. The analysis was conducted for three defect sizes: 100mm x 100mm, 75mm x 150mm, and 25mm x 150mm for both putties. It was found that the narrow defect of the pipeline causing the pipe to burst at lower pressure as compared to defect that have the same dimension area for both of the infill material. This may due to high stress concentration at small area of the defect. Furthermore, it was also revealed that infill with higher ultimate tensile strength able to withstand higher pressure. The finding of the research shows that by using appropriate infill, there are potential to increase the burst pressure by about 5%. The findings of this research can serve as stepping stone to study the feasibility of repairing damaged pipeline using putty alone.

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Published

2018-07-18

How to Cite

Abdul Jalil, M. H., Valipour, A., Kar Sing, L., Azraai, S. N. A., Zardasti, L., Yahaya, N., & N.M. Noor, N. N. (2018). EFFECT OF PUTTY PROPERTIES IN REPAIRING CORRODED PIPELINE: A FINITE ELEMENT ANALYSIS. Malaysian Journal of Civil Engineering, 28. https://doi.org/10.11113/mjce.v28.15997

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