Document Type and Number:
Japanese Patent JPWO2021171826
Kind Code:
A1
Abstract:
To provide a seamless pipe having excellent pressure resistance performance and a method for manufacturing the same .The seamless pipe in which a thin-walled portion in a pipe circumferential direction is formed in a pipe axial direction, in which a line segment formed by connecting one end and the other end of the thin-walled portion along a pipe surface with a shortest distance in a formation direction of the thin-walled portion is inclined at an angle α of 5.0° or more with respect to the pipe axial direction.It is preferable that one end and the other end of the thin-walled portion are set from a region in a pipe selected with a shorter length between a length of 1.0 m in the pipe axial direction and 90% of a length in the pipe axial direction where the thin-walled portion turns once in the pipe circumferential direction.
Application Number:
JP2021516501A
Publication Date:
September 02, 2021
Filing Date:
January 18, 2021
Export Citation:
Domestic Patent References:
| JPS56168903A | 1981-12-25 | |||
| JP5500324B1 | 2014-05-21 | |||
| JP2001009508A | 2001-01-16 | |||
| JPH07265910A | 1995-10-17 | |||
| JPS6431504A | 1989-02-01 | |||
| JPH1157842A | 1999-03-02 | |||
| JP2012167329A | 2012-09-06 |
Foreign References:
| WO2015182128A1 | 2015-12-03 | |||
| WO2016113790A1 | 2016-07-21 |
Other References:
日本鉄鋼協会, 鉄鋼便覧, vol. 第３版, III巻(2), JPN6021005072, 20 November 1980 (1980-11-20), JP, pages 929 - 933, ISSN: 0004685330
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