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A Study on the Proper Installation of Storage Tank Measuring Instruments through a Case Study of Corrosive Fluid Leak Accident

부식성 유체 누출 사고사례 연구를 통한 저장탱크 레벨게이지 적정설치에 관한 연구

  • Sang Ryung Kim (Korea Occupational Safety and Health Agency) ;
  • Gyu Sun Cho (Dept. of Industrial Safety Engineering, Soongsil Cyber Univ.) ;
  • Won Baek Yang (Dept. of Safety and Public administration, Hoseo Univ.)
  • 김상령 (한국산업안전보건공단) ;
  • 조규선 (호서대학교 안전행정공학과) ;
  • 양원백 (숭실사이버대학교 산업안전공학과)
  • Received : 2023.01.02
  • Accepted : 2023.04.25
  • Published : 2023.06.30

Abstract

In a chemical plant, while supplying corrosive fluid to a storage tank with a pump, an accident occurred where the corrosive fluid leaked through the upper exhaust vent because the level indicator was not accurately determined. There are various causes of leakage accidents, but we focused on the sticking of the level indicator of the level gauge, which is the direct cause. As a result of the analysis, the level indicator used in the workplace where the accident occurred was randomly replaced, and in the summer when the accident occurred, the tubular type level gauge was found to be more likely to stick than other types because thermal expansion easily occurs. In addition, there were difficulties in reviewing the proper installation because the installation standards for measuring instruments installed in storage tanks were not clear in Korea. Therefore, in this study, based on accident cases and overseas standards, we are going to find out about precautions when installing storage tank instrumentation.

수도권 내 화학공장에서 부식성 유체를 펌프로 저장탱크에 공급하던 도중 수위파악이 정확히 되지 않아 상부 배기벤트로 부식성유체가 누출되는 사고가 발생하였다. 누출 사고가 발생한데는 다양한 원인이 있지만 직접 원인인 레벨게이지의 수위 지시계가 고착되는 것에 초점을 맞추었다. 분석 결과 사고가 발생한 사업장에서 사용되는 수위 지시계를 임의로 교체하였으며, 사고발생인 여름에 Tubular 방식의 레벨게이지는 열팽창이 쉽게 일어나서 다른 형태보다 고착이 발생될 수 있는 것으로 파악되었다. 또한 국내에는 저장탱크에 설치되는 계측기기의 설치기준이 명확치 않아 적정설치 검토에 어려움이 있었다. 따라서 본 연구에서는 사고사례 및 해외기준을 바탕으로 저장탱크 계측기기류 설치 시 유의사항에 대해 검토하였다.

Keywords

References

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