Evaluation of a Reuse Method for Gas Shut-off Valves

Abstract

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.