Journal of Korean Society for Quality Management (품질경영학회지)

Korean Society for Quality Management (한국품질경영학회)
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An Assesment of the Gas Pipeline Reliability Using Corrosion based Composite Failure

부식기반 복합고장을 고려한 가스배관의 신뢰도 평가

  • Kim, Seong-Jun (Department of Industrial Engineering, Gangneung-Wonju National University) ;
  • Kim, Dohyun (Department of Industrial Engineering, Myongji University) ;
  • Kim, Woosik (Research Institute, Korea Gas Corporation) ;
  • Kim, Young-Pyo (Research Institute, Korea Gas Corporation) ;
  • Kim, Cheolman (Research Institute, Korea Gas Corporation)
  • 김성준 (강릉원주대학교 산업경영공학과) ;
  • 김도현 (명지대학교 산업경영공학과) ;
  • 김우식 (한국가스공사 가스연구원) ;
  • 김영표 (한국가스공사 가스연구원) ;
  • 김철만 (한국가스공사 가스연구원)
  • Received : 2019.10.30
  • Accepted : 2019.11.18
  • Published : 2019.12.31
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Abstract

Purpose: The purpose of this paper is to develop a reliability estimation procedure for the underground gas pipeline in the presence of corrosion defects. Methods: Corrosion is one of the major causes of the gas pipeline failure. Several failure forms caused by corrosion have been studied. Among them, small leak and burst are considered in this paper. The composite failure of the two is defined by limit state function, and it is expressed with pipe parameters. Given a modified corrosion dataset, in order to obtain reliability estimations, the method of first order and second moment is adopted because of its simplicity. The computation processes are conducted with MATLAB coding. Results: According to numerical results, the probability of composite failure is affected by both small leak and burst. In particular, when corrosion depth stays at low level, it is consistent with the probability of burst failure. On the contrary, it is more influenced by the small leak failure as corrosion depth is increasing. In such case, the probability of composite failure is fast approaching to the safety limit. Conclusion: By considering the composite failure, more practical predictions of remaining life can be obtained. The proposed method is useful for maintenance planning of the underground gas pipeline.

Keywords

References

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