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RESEARCH PAPERS: Offshore Mechanics/Ocean Engineering

Shear Fracture Arrestability of Controlled Rolled Steel X70 Line Pipe by Full-Scale Burst Test

[+] Author and Article Information
E. Sugie

Kawasaki Steel Corporation, Kawasaki-cho, Chiba, Japan; Iron and Steel Institute of Japan, High Strength Line Pipe Research Committee, Keidanren Kaikan, Chiyoda-ku, Tokyo, Japan

H. Kaji

Kobe Steel Ltd., Kakogawa City, Japan; Iron and Steel Institute of Japan, High Strength Line Pipe Research Committee, Keidanren Kaikan, Chiyoda-ku, Tokyo, Japan

T. Taira

Fukuyama Research Laboratories, Technical Research Center, Nippon Kokan K. K., Fukuyama-city, Hiroshima, Japan; Iron and Steel Institute of Japan, High Strength Line Pipe Research Committee, Keidanren Kaikan, Chiyoda-ku, Tokyo, Japan

M. Ohashi

Nippon Steel Corporation, 1 Kimitsu City, Chiba, Japan; Iron and Steel Institute of Japan, High Strength Line Pipe Research Committee, Keidanren Kaikan, Chiyoda-ku, Tokyo, Japan

Y. Sumitomo

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

J. Energy Resour. Technol 106(1), 55-62 (Mar 01, 1984) (8 pages) doi:10.1115/1.3231024 History: Received December 08, 1982; Revised October 07, 1983; Online October 22, 2009

Abstract

The High Strength Line Pipe Research Committee organized by the Iron and Steel Institute of Japan has conducted five full-scale burst tests on line pipe of 48 in. o.d. × 0.720 in. w.t. (wall thickness) and grade X70 under pressure of 80 percent SMYS with air: 1) to study the influence of separation on the arrestability of shear fracture, and 2) to obtain the material criterion for arresting the propagating shear fracture. Test pipes of Charpy V notch energy from 80 to 290J with different amount of separation, were produced from both controlled rolled steels and quenched and tempered steels. These research projects clarified that the separation of material itself did not influence the crack propagation behavior and its arrestability. Furthermore, the material criterion for arresting the shear fracture was analyzed by the pressure-velocity relationship counterbalancing the crack velocity curve and gas decompression curve.

Copyright © 1984 by ASME
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