JPS55140147A - Supersonic flaw detection for steel pipe - Google Patents
Supersonic flaw detection for steel pipeInfo
- Publication number
- JPS55140147A JPS55140147A JP4720979A JP4720979A JPS55140147A JP S55140147 A JPS55140147 A JP S55140147A JP 4720979 A JP4720979 A JP 4720979A JP 4720979 A JP4720979 A JP 4720979A JP S55140147 A JPS55140147 A JP S55140147A
- Authority
- JP
- Japan
- Prior art keywords
- flaw
- steel pipe
- gate
- reflected
- surface flaw
- 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.)
- Granted
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
PURPOSE: To make it possible to eliminate sensitivity difference and discriminate inner and outer surface flaws by setting the reflected echoes of the inner surface and outer surface of a steel pipe on separate gates and by adopting pulse DAC (pulse distance amplitude correction).
CONSTITUTION: The supersonic wave from probe 1 enters the thickness of steel pipe 3 diagonally and is reracted, and it is reflected by inner surface ID and outer surface OD and continues propagation. Reflected echo 4 of an inner flaw and reflected echo 5 of an outer flaw are displayed on a cathode-ray tube. At this time, by setting separate gates, inner surface flaw gate G2 and outer surface flaw gate G3, whether it is an inner surface flaw or an outer surface flaw is discriminated. Consequently, discrimination is easily operated, and at the same time, by adopting pulse dact to eliminate sensitivity difference, a signal that has entered the outer surface flaw gate can be corrected electrically and adjusted to the same level as the signal of the inner surface flaw gate, so that accurate detection can be operated.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4720979A JPS55140147A (en) | 1979-04-19 | 1979-04-19 | Supersonic flaw detection for steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4720979A JPS55140147A (en) | 1979-04-19 | 1979-04-19 | Supersonic flaw detection for steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55140147A true JPS55140147A (en) | 1980-11-01 |
| JPS6125097B2 JPS6125097B2 (en) | 1986-06-13 |
Family
ID=12768754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4720979A Granted JPS55140147A (en) | 1979-04-19 | 1979-04-19 | Supersonic flaw detection for steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55140147A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9316294B2 (en) | 2012-06-21 | 2016-04-19 | Neturen Co., Ltd. | Rack bar and rack bar teeth forming die |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016042043A (en) * | 2014-08-15 | 2016-03-31 | 出光興産株式会社 | External corrosion inspection apparatus and external corrosion inspection method |
-
1979
- 1979-04-19 JP JP4720979A patent/JPS55140147A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9316294B2 (en) | 2012-06-21 | 2016-04-19 | Neturen Co., Ltd. | Rack bar and rack bar teeth forming die |
| US10060518B2 (en) | 2012-06-21 | 2018-08-28 | Neturen Co., Ltd. | Rack bar and rack bar teeth forming die |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6125097B2 (en) | 1986-06-13 |
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