Title:
PIPE ULTRASONIC FLAW DETECTING APPARATUS AND ULTRASONIC FLAW DETECTING METHOD
Document Type and Number:
WIPO Patent Application WO/2007/058391
Kind Code:
A1
Abstract:
A pipe ultrasonic flaw detecting apparatus and ultrasonic flaw detecting method
for detecting a small defect, if any, of several hundreds micrometers or less
present in a thick portion of a welded part of, e.g., a seam-welded pipe by inspecting
the pipe from the inner to outer surface and enabling determination of a most suitable
condition when a pipe under test has a different size. A part of the vibrators of
a linear array probe are used as a transmitting vibrators, and a transmission
beam converged at the welded part at an oblique angle is transmitted. The other
vibrators different from the transmitting vibrators are used as receiving vibrators
to form a receiving beam converged at the converged position of the transmission
beam at an oblique angle. Thus, defect echoes from the welded part can be received
if the pipe has a defect.
Inventors:
IIZUKA YUKINORI (JP)
Application Number:
PCT/JP2006/323636
Publication Date:
May 24, 2007
Filing Date:
November 21, 2006
Export Citation:
Assignee:
JFE STEEL CORP (JP)
IIZUKA YUKINORI (JP)
IIZUKA YUKINORI (JP)
International Classes:
G01N29/04; G01N29/24
Foreign References:
| JPS5667750A | 1981-06-08 | |||
| JPH11183446A | 1999-07-09 | |||
| JPS62108865U | 1987-07-11 |
Other References:
IIDUKA Y. ET AL.: "Kokan Shohin o Sasaeru Hi Hakai Kensa Gijutsu", JEE GIHO, no. 9, August 2005 (2005-08-01), pages 40 - 45, XP003013317
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JFE Techno-Research Corporation 7th Floor Yanagiya Building, 1-10, Nihonbashi 2-chom, Chuo-ku Tokyo 27, JP)
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