Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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Development of Performance Test Procedure for the Excess Flow Valve for Buried Piping for the Domestic LPG Mass Supply System

국내 LPG 집단공급시설 환경에 적합한 매몰배관용 과류차단밸브 성능시험 절차 개발

  • Jang, Chanyeong (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Lee, Ugwiyeon (Institute of Gas Safety R&D, Korea Gas Safety Corporation) ;
  • Lee, Jinhan (Institute of Gas Safety R&D, Korea Gas Safety Corporation)
  • 장찬영 (한국가스안전공사 가스안전연구원) ;
  • 이우귀연 (한국가스안전공사 가스안전연구원) ;
  • 이진한 (한국가스안전공사 가스안전연구원)
  • Received : 2018.10.18
  • Accepted : 2018.11.28
  • Published : 2018.12.31
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Abstract

Since 2014, the Korean government has begun distributing LPG pipelines and LPG tankers to mountainous or island areas where it is difficult to open urban gas supply chains. When installing LPG supply facilities at village level and county level, it supplied consumers with 10 times higher quasi-low pressure (25 kPa to 100 kPa) than conventional gas supply pressure, increasing the risk of gas accident. Due to the pressure that is 10 times higher than the conventional gas supply pressure, large amounts of gas are released at a faster rate when leaked. In order to secure safety of quasi-low-pressure gas pipes, excess flow valves for quasi-low-pressure gas pipes are not developed and are not supplied in Korea. Therefore, Korea Gas Safety Corporation is investigating the performance standards and products of the excess flow valves in order to localize the excess flow valves.

대한민국 정부에서 2014년부터 LPG배관망과 LPG소형탱크를 도시가스 공급망 개설이 어려운 산간이나 도서지역에 보급하는 사업을 시작했다. 마을단위와 군단위로 LPG집단공급시설을 설치하면서 기존의 가스공급 압력이 아닌 10배 이상의 높은 준저압(25kPa~100kPa)으로 소비자에게 공급하게 되면서 가스사고의 위험성이 높아졌다. 기존의 가스공급압력보다 10배 이상 높은 압력이기 때문에 가스가 누출 되었을 때 빠른 속도로 많은 양이 누출하게 된다. 이에 준저압 가스배관의 안전성 확보를 위해 과류차단밸브가 필요하게 되었지만, 국내에서는 준저압 매몰배관용 과류차단밸브가 미개발되어 있으며 보급 또한 되어 있지 않는 상황이다. 이에 한국가스안전공사에서는 과류차단밸브의 국산화를 위해 과류차단밸브를 기개발한 해외의 성능기준과 제품을 조사 중에 있으며, 과류차단밸브의 성능평가를 위해 성능시험설비를 구축하여 준저압 연료가스 매몰배관용 과류차단밸브를 연구 개발 중에 있다.

Keywords

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Fig. 1. Gas pipe exposed damage point and gas leakage fire point.[1]

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Fig. 2. Operational structure of excess flow valve.[3]

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Fig. 3. Installation spot in LPG pipeline.

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Fig. 4. Ejection of the DPBE in the PE service line.[10]

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Fig. 5. Village unit LPG Pipe network Supply System.

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Fig. 6. Fusecock supply rate and trend of LPG accident.[19]

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Fig. 7. Excess Flow Valve performance test facility in KGS.

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Fig. 8. Flange and Oring of Excess Flow Valve performance test facility in KGS.

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Fig. 9. Flange on rail of Excess Flow Valve performance test facility in KGS.

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Fig. 10. Design drawing of Excess Flow Valve performance test facility.

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Fig. 11. Excess Flow Valve Performance test equipment operation screen

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Fig. 12. Leak or By-pass Rate Test Action Screen of Excess Flow Valve performance test facility.

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Fig. 13. Trip Flow Rate Test Graph & Leak(or BY-PASS) Rate Test Graph.

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Fig. 14. Pressure Drop Test Action Screen of Excess Flow Valve performance test facility.

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Fig. 15. A differential gauge of Reset Test

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Fig. 18. Snap Acting Test graph.

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Fig. 19. A repeated test Equipment of EFV.

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Fig. 20. Schematic design for repeat test for trip and return function.

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Fig. 21. Maximum protectable pipe length measuring facility.[5]

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Fig. 16. Reset Test graph.

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Fig. 17. AOV-5 Valve of SNAP ACTING

Table 1. Types of accidents in the last five years in Korea[1]

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Table 2. Serious Incident Cause Breakdown 12 Year Average(1992-2004)[11]

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Table 3. Improved fuel cost burden

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Table 4. EFV performance test configuration [20,21]

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