Tomoaki Takeuchi, Akira Takahashi, Hidenobu Nakai, Kenichi Ishii, Yoshiyuki Makino, Kozo Imai and Tetsuo Inoue
Abstract
A flexible pipe for gas transmission with composite structure has been developed, which can be installed without joints for long distances along meandering open-cut routes or in underground conduits. The structure of this pipe is such that multiple stainless steel tapes are gap wrapped in spiral on a polyethylene pipe, whereby the steel tape thickness is optimized to make the pipe applicable to a wide pressure range from medium-to high-pressures, while maintaining flexibility by minimizing the pipe wall thickness. Moreover, earthquake resistance is one of its advantageous features. In this report, the design of the 德赢ac米兰vwin in conformity to the Technical Standard for Gas Facilities of Japan is described, together with the results of various characteristic evaluation tests on the prototype pipes.
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