JPS551541A - Ultrasonic flaw detection method of steel pipe weld zones - Google Patents
Ultrasonic flaw detection method of steel pipe weld zonesInfo
- Publication number
- JPS551541A JPS551541A JP7442278A JP7442278A JPS551541A JP S551541 A JPS551541 A JP S551541A JP 7442278 A JP7442278 A JP 7442278A JP 7442278 A JP7442278 A JP 7442278A JP S551541 A JPS551541 A JP S551541A
- Authority
- JP
- Japan
- Prior art keywords
- weld zone
- echo
- detection method
- steel pipe
- flaw detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
PURPOSE: To enable defect positions as well as presence or not of harmfulness to be judged by displaying the echo height of each division in a Braun tube through the use of a perpendicular flaw detection method and plural division of the thickness of the weld zone and outputting defect echo heights as numerical values.
CONSTITUTION: With a hold 4 being placed so as to put on the weld zone 2 of a steel pipe 1, a probe 3 is positioned right above the weld zone and is scanned while water is being supplied from a water supply hole 5. As a result, the position being detected is displayed as axial distance with the pipe end as a reference on a position display device 8 and at the same time the echo height is also displayed in the Braun tube of a flaw detector 10. When a defect echo exists in the 10 channel gate circuit having been set in the weld zone in sychronization to the position signal of the probe, the echo height is converted to numerical values in 10% unit and the numerical eche heights above the preset level and their positions are simultaneously printed and recorded by a printer 12.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7442278A JPS551541A (en) | 1978-06-19 | 1978-06-19 | Ultrasonic flaw detection method of steel pipe weld zones |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7442278A JPS551541A (en) | 1978-06-19 | 1978-06-19 | Ultrasonic flaw detection method of steel pipe weld zones |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS551541A true JPS551541A (en) | 1980-01-08 |
Family
ID=13546739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7442278A Pending JPS551541A (en) | 1978-06-19 | 1978-06-19 | Ultrasonic flaw detection method of steel pipe weld zones |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS551541A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5784378A (en) * | 1980-11-14 | 1982-05-26 | Nippon Kokan Kk <Nkk> | Method of measuring distance with supersonic wave in flowing fluid |
| KR20030054633A (en) * | 2001-12-26 | 2003-07-02 | 주식회사 포스코 | Interior crack exploration apparatus of continuous casting slab |
| JP2008215936A (en) * | 2007-03-01 | 2008-09-18 | Tokyo Electric Power Co Inc:The | Ultrasonic flaw detection method for blade of gas turbine |
-
1978
- 1978-06-19 JP JP7442278A patent/JPS551541A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5784378A (en) * | 1980-11-14 | 1982-05-26 | Nippon Kokan Kk <Nkk> | Method of measuring distance with supersonic wave in flowing fluid |
| KR20030054633A (en) * | 2001-12-26 | 2003-07-02 | 주식회사 포스코 | Interior crack exploration apparatus of continuous casting slab |
| JP2008215936A (en) * | 2007-03-01 | 2008-09-18 | Tokyo Electric Power Co Inc:The | Ultrasonic flaw detection method for blade of gas turbine |
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