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Risk Assessment Using RBI for Internal Corroded Pipelines in CDU Desulfurization Process

CDU 내 탈황공정의 내부부식 된 파이프라인을 대상으로 한 RBI기법을 이용한 위험성 평가

  • Lim, Donghui (Department of Chemical Engineering, Kwangwoon University) ;
  • Jeong, Taehun (Department of Chemical Engineering, Kwangwoon University) ;
  • Lee, In-Dong (Department of Chemical Engineering, Kwangwoon University) ;
  • Jung, In Hee (Department of Chemical Engineering, Kwangwoon University) ;
  • Ko, Jae-Wook (Department of Chemical Engineering, Kwangwoon University)
  • 임동휘 (광운대학교 화학공학과) ;
  • 정태준 (광운대학교 화학공학과) ;
  • 이인동 (광운대학교 화학공학과) ;
  • 정인희 (광운대학교 화학공학과) ;
  • 고재욱 (광운대학교 화학공학과)
  • Received : 2019.02.19
  • Accepted : 2019.06.21
  • Published : 2019.06.29

Abstract

in 2010s, many factories are operating without any safety guarantees due to the aging process. Although it is difficult to fundamentally solve the problem of aging process and equipment, Prevent risk by risk assessment in advance. This study targets the corrosion caused by sulfur in the piping in the CDU(Crude Distillation Unit) process desulfurization equipment and conducts the risk assessment by RBI(Risk Based Inspection) referring to API RP 581. RBI expresses the risk by combining frequency and consequence, and creates a risk matrix based on these expression. In this study, the hole size of the pipe was selected as Small and Medium, and the sensitivity of the frequency was selected as 'Low'. You can refer to the Risk Matrix created from the standard to evaluate the risk of corrosion of sulfur from pipes in the piping and to plan future accident prevention. Similarly, prevention of aging in a similar way can prevent large and small incidents that are not visible.

2010년대에 들어서 노후화된 공정으로 인하여 많은 공장들의 안전이 보장되지 않은 채로 가동되고 있다. 공정 및 설비의 노후화 문제를 근본적으로 해결하기는 어렵지만, 사전에 위험성 평가로 위험을 예방할 수있다. 본 연구는 CDU(Crude Distillation Unit)의 탈황 장비에 있는 배관에서 황으로 인한 부식을 타겟으로 지정하였고, API RP 581를 참고한 RBI(Risk Based Inspection)기법으로 위험성 평가를 실시하였다. RBI 기법은 Frequency와 Consequence의 조합으로 Risk를 표현하고, 이들을 바탕으로 Risk Matrix를 만든다. 본 연구는 배관의 Hole Size를 Small과 Medium으로, Frequency의 감도는 'Low'로 선택하여 진행하였다. 기준을 통해 만들어진 Risk Matrix를 참고하여 배관에서 황으로 인한 부식의 사고 위험성을 평가하고 향후 사고 방지 계획을 세울 수 있다. 또한 이와 비슷한 방법으로 노후화에 대한 예방을 한다면 보이지 않는 크고 작은 사고들도 예방 할 수 있다.

Keywords

References

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