Natural Gas Decompression Behavior in High Pressure Pipelines

Hiroyuki Makino; Takeshi Sugie; Hiroshi Watanabe; Takahiro Kubo; Toyoaki Shiwaku; Shigeru Endo; Takehiro Inoue; Yoshiaki Kawaguchi; Yoichiro Matsumoto; Susumu Machida

doi:10.2355/isijinternational.41.389

Hiroyuki Makino, Takeshi Sugie, Hiroshi Watanabe, Takahiro Kubo, Toyoaki Shiwaku, Shigeru Endo, Takehiro Inoue, Yoshiaki Kawaguchi, Yoichiro Matsumoto, Susumu Machida

Author information

Hiroyuki Makino
Corporate Research & Development Laboratories, Sumitomo Metal Industries Limited
Takeshi Sugie
Department of Mechanical Engineering, The University of Tokyo
Hiroshi Watanabe
Graduate School of Frontier Sciences, The University of Tokyo
Takahiro Kubo
Technical Research Laboratories, Kawasaki Steel Corporation
Toyoaki Shiwaku
Iron and Steel Sector, Kobe Steel, Limited
Shigeru Endo
Materials and Processing Research Center, NKK
Takehiro Inoue
Steel Research Laboratories, Nippon Steel Corporation
Yoshiaki Kawaguchi
Frontier Research Center for Structural Materials, National Research Institute for Metals
Yoichiro Matsumoto
Department of Mechanical Engineering, The University of Tokyo
Susumu Machida
Faculty of Engineering, Chiba University

Keywords: natural gas decompression behavior, high-pressure natural gas transmission, dual-phase decompression curve, fracture initiation process

JOURNAL FREE ACCESS

2001 Volume 41 Issue 4 Pages 389-395

DOI https://doi.org/10.2355/isijinternational.41.389

Details

Abstract

This paper gives the analysis in the natural gas decompression behavior in pipelines as one of the important items for predicting the fracture safety of latest high-pressure natural gas transmission. By combining "British Gas Theoretical Model of Rich Gas Decompression" and "BWRS Equation of State", authors successfully developed the computational program, which can calculate dual-phase decompression curves of the natural gases. In the calculated results, the phenomenon of the "plateau" in the dual-phase decompression curve has been confirmed. Authors also numerically simulated the natural gas decompression behavior in pipelines and analyzed the fracture initiation process. It was shown that the initiation period is too short to influence the gas decompression curves.

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