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.:
Date of Patent:
Nov. 12, 2013
Filed:
May. 18, 2007
Yukinori Iizuka, Kawasaki, JP;
Kazuhito Kenmochi, Chiba, JP;
Hiroyasu Yokoyama, Handa, JP;
Tomohiro Inoue, Kawasaki, JP;
Shigeto Sakashita, Kawasaki, JP;
Yukinori Iizuka, Kawasaki, JP;
Kazuhito Kenmochi, Chiba, JP;
Hiroyasu Yokoyama, Handa, JP;
Tomohiro Inoue, Kawasaki, JP;
Shigeto Sakashita, Kawasaki, JP;
JFE Steel Corporation, Tokyo, JP;
Abstract
According to the present invention, penetrators can be adequately determined as flaws. In particular, a welded zone of a pipe is subjected to ultrasonic flaw detection at least in a pipe axial direction, and the quality of the pipe is evaluated using observed values in units of a predetermined area in a pipe thickness direction and the pipe axial direction. The length of one side of the predetermined area is an ultrasound beam width or more and a pipe thickness or less. The quality of the pipe can be evaluated while shifting the predetermined area in the pipe axial direction by using an average value of the observed values within the predetermined area. The length of one side of the predetermined area can be made an ultrasound beam width or more and a pipe thickness or less.