Journal of Failure Analysis and Prevention

, Volume 15, Issue 5, pp 641–650 | Cite as

Experimental and Numerical Study of Locally Reinforced Pipelines

  • Yan Di
  • Jian Shuai
  • Yan Li
  • Dexu Liu
Technical Article---Peer-Reviewed


The safety of pipelines being repaired by local reinforcement methods such as welding a cap or patch is gaining attention. This paper describes experimental and numerical research conducted to assess loading capacity of these local reinforcement pipelines when subjected to internal pressure. Two full-scale hydrotests were performed on pipe sections removed from service. The strain variation and burst pressure were measured, and the strain concentrations and collapse loads were investigated. The results demonstrate that there is small difference between the two repaired pipe sections on the burst pressure. Strain output from both actual tests and finite element analyses shows that both repair methods do result in strain concentrations around the repair site, and that the patch method results in less strain variation and lower stress levels compared to the cap repair method.


Burst test Locally reinforced pipeline Failure analysis Finite element analysis 



The work included in this paper is supported by the National Key Sci-Tech Major Special Item of China, under Award No. 2011ZX05017-004.


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Copyright information

© ASM International 2015

Authors and Affiliations

  1. 1.Faculty of Mechanical and Transportation EngineeringChina University of PetroleumBeijingChina
  2. 2.SINOPEC Science and Technology DevelopmentBeijingChina
  3. 3.Zhongyuan Petroleum Prospecting and Design InstitutePuyangChina

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