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:
Dec. 03, 1985
Filed:
Oct. 14, 1983
Hirofumi Miyamoto, Hirakata, JP;
Nobuaki Kaitatsu, Ikoma, JP;
Junichi Sugitani, Hirakata, JP;
Yasumaru Taniguchi, Osaka, JP;
Tetsuo Kaji, Himeji, JP;
Kubota, Ltd., Osaka, JP;
Osaka Gas Company, Limited, Osaka, JP;
Abstract
A method of ultrasonic flaw detection of a pipe comprises comparing ultrasonic waves passing through a test piece portion with the arithmetic means of ultrasonic waves passing through portions adjacent each side of the test portion. The comparison is made around the entire periphery of a pipe, for example, an austenic heat resisting cast steel pipe used as a hydrogen manufacturing reformer tube. This method is free from adverse influence of macrostructures unevenly distributed in the peripheral direction of the pipe, and enables a quantitative grasp of flaws in a base material and a weld of the pipe.