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Assessment of Gas Leakage for a 30-inch Ball Valve used for a Gas Pipeline
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 Title & Authors
Assessment of Gas Leakage for a 30-inch Ball Valve used for a Gas Pipeline
KIM, CHUL-KYU; LEE, SANG-MOON; JANG, CHOON-MAN;
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 Abstract
The purpose of this study is to evaluate the gas leakage for a 30-inch ball valve. The ball valve was designed and manufactured for a natural gas transportation through a long-distance pipeline mainly installed in the permafrost region. The gas leakage assessment is based on the pressure testing criteria of international standards. Pressure conditions of the gas leakage test was employed 70 bar, 100 bar, and 110 bar. The amount of the gas leakage at each pressure condition was small and had a value under the pressure testing criteria, ISO 5208. Gas leakage with respect to the test pressure was predicted by the polynomial curve fitting using the experimental results. It is found that the gas leakage rate according to the pressure is proportion to a second order curve.
 Keywords
Ball valve;Permafrost region;Closure test;Gas pipeline;Gas leakage;Gas leakage prediction curve;
 Language
Korean
 Cited by
 References
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