| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.4 ( December 1981 ) Special Issue on Steel Pipe ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Manufacturing of New 26-inch ERW High-Test Line Pipe
Toshihiro Terada, Yutaka Hirano, Teruo Otani, Yuzo Yoshimoto, Shoichi Takizawa, Makoto Fukai, Fumihiro Onishi, Eiichi Yokoyama |
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Synopsis : A cage forming type ERW mill newly installed at Chita Works, Kawasaki Steel Corporation, is one of the world's largest of its kind, capable of producing high quality steel pipes up to 26" (660.4mm) in outside diameter and 0.63" (16.0mm) in wall thickness. Factors contributing to the improved product quality of the new mill have been examined and the following results have been obtained: (1) The application of vertical-bending type caster with shielding is effective in reducing weld defects. (2) Controlled rolling techniques have made it possible to yield better mechanical properties and toughness of the hot strip. (3) Pipe-making technique by cage roll forming, heat input control in welding, fully automatic control in seam annealing and full-body ultrasonic testing have contributed to the production of ERW pipes with higher quality and reliability. (4) Supplementary mechanical properties such as yield strength drop due to Bauschinger effect, yield and burst strength by internal pressure, and tensile strength at lower temperatures have been quantitatively determined. |
| TextiPDF: 21p./788kbj |