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RESEARCH PAPERS

Notch Ductilities of Rich Natural Gas Transmission Line Pipes for Arresting Propagating Shear Fracture

[+] Author and Article Information
E. Sugie

Kawasaki Steel Corporation; High Strength Line Pipe Research Committee, Iron and Steel Institute of Japan, Tokyo, Japan

M. Matsuoka

Kobe Steel Ltd.; High Strength Line Pipe Research Committee, Iron and Steel Institute of Japan, Tokyo, Japan

T. Akiyama

Nippon Kokan K. K.; High Strength Line Pipe Research Committee, Iron and Steel Institute of Japan, Tokyo, Japan

K. Tanaka

Nippon Steel Corporation; High Strength Line Pipe Research Committee, Iron and Steel Institute of Japan, Tokyo, Japan

Y. Kawaguchi

Sumitomo Metal Industries Ltd.; High Strength Line Pipe Research Committee, Iron and Steel Institute of Japan, Tokyo, Japan

J. Offshore Mech. Arct. Eng 109(1), 2-8 (Feb 01, 1987) (7 pages) doi:10.1115/1.3256987 History: Received June 25, 1985; Revised May 01, 1986; Online October 30, 2009

Abstract

High Strength Line Pipe Research Committee organized by The Iron and Steel Institute of Japan carried out two full-scale burst tests on X 70 line pipes, 48 in. o.d. × 0.720 in. w.t., with rich natural gas as the pressurizing gas. A theoretical investigation which gives the crack velocity change in terms of the crack velocity curve and the gas decompression velocity curve is presented, and the theoretical predictions and the experimental results are in good agreement. The developed method can predict the required notch ductilities obtained from Charpy test and DWTT in order to arrest a propagating shear fracture according to the type of gas, design stress and acceptable fracture length in the pipeline.

Copyright © 1987 by ASME
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