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Experimental Study on the Safety of a Valve for a Special Gas Cylinder

특수가스용기용 밸브의 안전성에 관한 실험적 연구

  • Kim, Chung Kyun (Research Center for Tribology, Mechatronics and Energy Technology Hongik University)
  • 김청균 (홍익대학교 트리보.메카.에너지기술 연구센터)
  • Received : 2013.04.01
  • Accepted : 2013.06.25
  • Published : 2013.06.30

Abstract

This paper presents an experimental study on the safety of a valve for a special gas cylinder. The test valves that were randomly dismantled from the special gas cylinder were experimented on the gas leakage and operation safeties. The crack, wear and deformation of the valve body, screw thread, safety disk, vent hole, stem and handle components that may affect to the gas leakage safety of a used valve were not found in this experimental study. A painted handle of a valve was partly stripped from the coated surface, and the surface of PT screw of a used valve body was rusted. But, these paint and rust problems do not affected to the gas leakage safety of used valves. And there was no gas leakage in the dismantled valve, and the permanent deformation and partial scars of a valve stem and O-rings were observed on the rubbing surfaces. Thus, the valve seat and O-rings are recommended to be replaced for a gas leakage safety of a dismantled valve. And it is necessary to repair and inspect handle fastening forces for a safe opening and closing operations of a valve.

본 연구에서는 특수가스용기용 밸브의 안전성에 관한 실험적 연구를 수행하였다. 시험용 밸브는 특수가스용기에 부착되었던 것을 무작위로 수거한 것으로 가스누출 및 작동 안전성에 대한 시험을 실시하였다. 실험결과에 의하면, 밸브의 몸체, 나사 체결부, 안전판, 방출구, 스템부, 핸들에서 가스누출 안전성에 영향을 미칠 정도의 크랙, 마모, 부식, 변형이 발생하지 않았다. 다만, 핸들의 페인트 일부가 벗겨지고, PT나사와 몸체에서 녹이 국부적으로 형성되어 있지만, 가스누출 안전성에 영향을 미칠 정도는 아니었다. 또한, 탈거한 밸브에서 가스누출은 발생되지 않았다. 다만, 밸브스템의 영구변형과 오링의 마찰표면 일부에서 손상이 관찰되었다. 따라서, 탈거된 밸브의 가스누출 안전성을 보장하기 위해서 밸브시트와 오링 교체하는 것이 바람직함을 알 수 있다. 또한, 핸들의 조임력을 주기적으로 점검하는 것이 필요함을 알 수 있었다.

Keywords

References

  1. Chung Kyun Kim and Do Hyun Kim, "Numerical Study on the Leakage Safety of O-rings for a LPG Cylinder Valve", J. of the KIGAS, 11(2), 37-42, (2007)
  2. Chung Kyun Kim and Kyoung Seok Oh, "Optimization Design of a Gas Valve for a LPG Cylinder Using a Taguchi's Experimental Method", J. of the KIGAS, 10(4), 23-28, (2006)
  3. Chung Kyun Kim, Byung Kwan Lee, and Tae Hwan Kim, "Experimental Investigation on Cracks and Defects of a Valve Sealing Components for a LPG Cylinder," J. of the KIGAS, 11(1), 23-28, (2007)
  4. KGS AA311, (2009)
  5. KGS AA316, (2009)

Cited by

  1. A Study on the Strength Safety of Valve Structure for LPG Cylinder vol.18, pp.6, 2014, https://doi.org/10.7842/kigas.2014.18.6.27