Journal of Materials Life Society
Online ISSN : 2185-7016
Print ISSN : 1346-0633
ISSN-L : 1346-0633
Volume 26 , Issue 1
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Original Paper
  • Yoshinori OZAWA, Akiharu ASADA, Hiroyuki NISHIMURA
    2014 Volume 26 Issue 1 Pages 1-7
    Published: February 28, 2014
    Released: May 08, 2021
    JOURNALS FREE ACCESS

    A gas shut-off valve is a security component used in the intelligent gas meter. The gas shut-off valves used by Osaka Gas Co. are characterized by : (1) a 100% retrieval rate within ten years after installation of the gas meter, (2) an established retrieval procedure, and (3) a single model complying with identical specifications. Taking advantage of these features, the authors have developed a reuse method for gas shut-off valves. Specifically speaking, the accelerated deterioration test conditions have been established as a statistical procedure has been developed for determining the reusability rate, and the criterion for evaluating reusability has been clarified.

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