Journal of Korean Society for Quality Management (품질경영학회지)

Korean Society for Quality Management (한국품질경영학회)
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A Study on the Estimating Burst Pressure Distributions for Reliability Assessment of API 5L X65 Pipes

API 5L X65 배관의 신뢰도 평가를 위한 파열압력 분포 추정에 관한 연구

  • Kim, Seong-Jun (Department of Industrial Engineering, Gangneung-Wonju National University) ;
  • Kim, Dohyun (Department of Industrial Engineering, Myongji University) ;
  • Kim, Cheolman (Research Institute, Korea Gas Corporation) ;
  • Kim, Woosik (Research Institute, Korea Gas Corporation)
  • 김성준 (강릉원주대학교 산업경영공학과) ;
  • 김도현 (명지대학교 산업경영공학과) ;
  • 김철만 (한국가스공사 가스연구원) ;
  • 김우식 (한국가스공사 가스연구원)
  • Received : 2020.10.30
  • Accepted : 2020.12.07
  • Published : 2020.12.31
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Abstract

Purpose: The purpose of this paper is to present a probability distribution of the burst pressure of API 5L X65 pipes for the reliability assessment of corroded gas pipelines. Methods: Corrosion is a major cause of weakening the residual strength of the pipe. The mean residual strength on the corrosion defect can be obtained using the burst pressure code. However, in order to obtain the pipe reliability, a probability distribution of the burst pressure should be provided. This study is concerned with estimating the burst pressure distribution using Monte Carlo simulation. A response surface method is employed to represent the distribution parameter as a model of the corrosion defect size. Results: The experimental results suggest that the normal or Weibull distribution should be suitable as the probability distribution of the burst pressure. In particular, it was shown that the probability distribution parameters can be well predicted by using the depth and length of the corrosion defect. Conclusion: Given a corrosion defect on the pipe, its corresponding burst pressure distribution can be provided at instant. Subsequently, a reliability assessment of the pipe is conducted as well.

Keywords

References

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