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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9506132 B1

PDFFull Text
Date of Patent:
Nov. 29, 2016

Filed:

Oct. 03, 2013

Method for manufacturing heavy wall steel pipe

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Tatsuro Katsumura, Tokyo, JP;

Hiroyuki Fukuda, Tokyo, JP;

Koji Sugano, Tokyo, JP;

Kazutoshi Ishikawa, Tokyo, JP;

Yasuhide Ishiguro, Tokyo, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Rebecca Lee

Int. Cl.
CPC ...
C22C 38/54 (2006.01); C21D 9/08 (2006.01); C21D 1/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C21D 8/10 (2006.01); C21D 1/60 (2006.01); C21D 1/18 (2006.01); C21D 6/00 (2006.01);
U.S. Cl.
CPC ...
C22C 38/54 (2013.01); C21D 1/00 (2013.01); C21D 1/18 (2013.01); C21D 1/60 (2013.01); C21D 6/001 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/105 (2013.01); C21D 9/08 (2013.01); C21D 9/085 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01);
Abstract

A method for manufacturing a heavy wall steel pipe includes a cooling step in which a steel pipe, with a wall thickness of ½ inch or more, that has been heated to the gamma range is dipped in water while supporting and rotating the steel pipe about the axis of pipe, an axial stream which is a water flow in the direction of axis of pipe is applied to the inside surface of the steel pipe under rotation in the water, and an impinging stream which is a water flow impinging on the outer surface of the pipe is applied to the outer surface of the steel pipe under rotation in the water.

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