JP3413249B2 - Standard specimen for non-destructive inspection of piping - Google Patents
Standard specimen for non-destructive inspection of pipingInfo
- Publication number
- JP3413249B2 JP3413249B2 JP18196693A JP18196693A JP3413249B2 JP 3413249 B2 JP3413249 B2 JP 3413249B2 JP 18196693 A JP18196693 A JP 18196693A JP 18196693 A JP18196693 A JP 18196693A JP 3413249 B2 JP3413249 B2 JP 3413249B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- test piece
- standard test
- inspected
- peripheral surface
- 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.)
- Expired - Fee Related
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、配管非破壊検査に用い
られる標準試験片に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a standard test piece used for nondestructive inspection of piping.
【0002】[0002]
【従来の技術】各種配管の腐食等の劣化を検査する配管
非破壊検査方法として、図4に示すような超音波の反射
エコーを利用したものが知られている。かかる配管非破
壊検査方法は、探触子2から被検査配管3に超音波を放
射し、反射エコーの到来時間か欠陥の位置を測定し、反
射エコーの大きさから欠陥の大きさを測定するものであ
る。超音波測定器の測定精度または分解能のバラツキ、
温度ドリフト等の影響を除去するために、校正用の標準
試験片により試験結果の校正を行なうのが一般的であ
る。従来は、配管測定でも、図5に示すような、平坦で
厚みが階段状に変化し、厚さが6ミリ以上の平板を校正
するJIS規格の標準試験片5を用いて校正している。2. Description of the Related Art As a pipe nondestructive inspection method for inspecting various types of pipes for deterioration such as corrosion, there is known a method using reflected echo of ultrasonic waves as shown in FIG. In such a pipe nondestructive inspection method, ultrasonic waves are radiated from the probe 2 to the pipe 3 to be inspected, the arrival time of the reflection echo or the position of the defect is measured, and the size of the defect is measured from the size of the reflection echo. It is a thing. Variations in measurement accuracy or resolution of ultrasonic measuring instruments,
In order to remove the influence of temperature drift and the like, it is common to calibrate the test results with a standard test piece for calibration. Conventionally, even in piping measurement, calibration is performed using a JIS standard test piece 5 for calibrating a flat plate having a flat thickness and a stepwise change in thickness as shown in FIG.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、従来の
JIS規格の標準試験片を用いた配管非破壊検査方法は
以下のような問題点が未解決である。
(A)配管材の場合は、図4に示すように、測定対象の
外周面が円弧状となるため、超音波測定器の探触子2と
被検査配管3との間に未接触部位が生じ、平板用の標準
試験片では等価性が得られず正確に校正できない。しか
も、口径毎に円弧が異なるから感度の調整を一定にした
り、欠陥検出性能を一定にすることができない。
(B)更に、口径毎に円弧が異なり、探触子2と被検査
配管3との接触面積が大きく変わるため、底面(内面)
または欠陥位置からのエコーの高さも大きく変化し、欠
陥部位の大きさの判定評価にもバラツキを生じる。欠陥
部位が小さい場合は、厚み方向の位置によっては全く測
定できないこともある。
(C)標準試験片は肉厚が6ミリ以上を対象とするた
め、大半の肉厚が6ミリ以下の配管を対象とした場合、
肉厚が薄くなるほど適切な校正が得られない。
(D)超音波を収束させ分解能を高めるために先端を細
くした円錐状のディレー材21(図4参照)を使用する
と、ディレー材21の表面が円弧状に摩耗し、焦点距離
が変化するので感度調整を頻繁に実施しなければならな
い。感度調整の頻度が増すと、ディレー材21の摩耗も
増し、その結果、感度調整回数は相乗的に増える。However, the conventional pipe non-destructive inspection method using the standard JIS standard test piece has not yet solved the following problems. In the case of (A) piping material, as shown in FIG. 4, since the outer peripheral surface of the measurement target has an arc shape, there is a non-contact portion between the probe 2 of the ultrasonic measuring device and the pipe 3 to be inspected. However, the standard test piece for flat plate cannot obtain the equivalence and cannot be calibrated accurately. Moreover, since the circular arc is different for each aperture, it is not possible to make the sensitivity adjustment constant or the defect detection performance constant. (B) Further, since the circular arc is different for each aperture and the contact area between the probe 2 and the pipe to be inspected 3 is greatly changed, the bottom surface (inner surface)
Alternatively, the height of the echo from the defect position changes significantly, and the evaluation of the size of the defect portion also varies. When the defective portion is small, it may not be possible to measure it at all depending on the position in the thickness direction. (C) Since the standard test piece is intended for a wall thickness of 6 mm or more, when most pipes having a wall thickness of 6 mm or less are targeted,
The thinner the wall, the less accurate calibration can be obtained. (D) If a conical delay material 21 (see FIG. 4) with a thin tip is used to converge the ultrasonic waves and improve the resolution, the surface of the delay material 21 is worn in an arc shape and the focal length changes. Sensitivity adjustment must be performed frequently. As the frequency of sensitivity adjustment increases, the wear of the delay material 21 also increases, and as a result, the number of times of sensitivity adjustment synergistically increases.
【0004】そこで、本発明の第1の課題は、上述する
問題点を解決し、被検査配管の口径に応じて感度の調整
を適切、かつ、容易にし得る配管非破壊検査用の標準試
験片を提供することである。Therefore, a first object of the present invention is to solve the above-mentioned problems, and to appropriately and easily adjust the sensitivity according to the diameter of the pipe to be inspected, which is a standard test piece for pipe nondestructive inspection. Is to provide.
【0005】本発明の第2の課題は、欠陥の大きさを校
正し得る配管非破壊検査用の標準試験片を提供すること
である。A second object of the present invention is to provide a standard test piece for pipe nondestructive inspection capable of calibrating the size of defects.
【0006】本発明の第3の課題は、感度の調整及び欠
陥の大きさの校正を同一試験片で行ない得る配管非破壊
検査用の標準試験片を提供することである。A third object of the present invention is to provide a standard test piece for non-destructive inspection of pipes in which sensitivity adjustment and defect size calibration can be performed with the same test piece.
【0007】[0007]
【課題を解決するための手段】上述した第1の課題解決
のため、本発明に係る配管非破壊検査用の標準試験片
は、第1の部分と、第2の部分とを含む配管非破壊検査
用の標準試験片であって、前記第1の部分及び前記第2
の部分は、一体に形成され、全体として円弧状であり、
前記第1の部分は、被検査配管と同一の外径及び肉厚で
あり、前記第2の部分は、内周面に凹部を有し、外周面
が前記第1の部分の外周面の曲率と同一曲率であって、
肉厚が前記第1の部分の肉厚の半分である。 In order to solve the above-mentioned first problem , a standard test piece for pipe nondestructive inspection according to the present invention.
Is a standard test piece for pipe non-destructive inspection including a first part and a second part, wherein the first part and the second part
The part of is integrally formed and has an arc shape as a whole,
The first portion has the same outer diameter and wall thickness as the pipe to be inspected, the second portion has a concave portion on the inner peripheral surface, and the outer peripheral surface has a curvature of the outer peripheral surface of the first portion. Has the same curvature as
The wall thickness is half the wall thickness of the first portion .
【0008】第2の課題解決のため、前記第2の部分
は、前記円弧部分の内周面側に開口径が異なる複数個の
凹部を有している。To solve the second problem, the second portion has a plurality of recesses having different opening diameters on the inner peripheral surface side of the arc portion.
【0009】第3の課題解決のため、前記第1の部分
は、前記円弧部分の内周面側に開口径が異なる複数個の
別の凹部を有している。In order to solve the third problem, the first portion has a plurality of different recesses having different opening diameters on the inner peripheral surface side of the arc portion.
【0010】[0010]
【作用】第1の部分は円弧部分が被検査配管と同一の外
径となっており、第2の部分は円弧部分の外周面が第1
の部分の外周面の曲率と同一曲率となっているから、実
際の被検査配管の測定状態と標準試験片の測定状態とが
同一の関係となり、被検査配管の測定と、標準試験片の
測定とを対にして行ない両者を比較すると、感度を一定
の状態に保つことができる。In the first portion, the arc portion has the same outer diameter as the pipe to be inspected, and in the second portion, the outer peripheral surface of the arc portion is the first.
Since the curvature of the outer peripheral surface of the part is the same, the actual measurement state of the pipe to be inspected and the measurement state of the standard test piece have the same relationship, and the measurement of the pipe to be inspected and the standard test piece are measured. When paired with and compared, the sensitivity can be kept constant.
【0011】第1の部分は円弧部分が被検査配管と同一
の肉厚となっており、第2の部分は円弧部分の肉厚が第
1の部分の肉厚よりも薄くなっているから、第1の部分
により被検査配管と同一の肉厚に対応した校正が可能と
なり、第2の部分により被検査配管より薄い肉厚、例え
ば欠陥の深さに対応した校正が可能となる。このため、
実際の測定データを標準試験片の肉厚に応じて適切、か
つ、容易に校正でき、各種の欠陥の深さに対して欠陥検
出性能を一定にすることができる。The arc portion of the first portion has the same thickness as that of the pipe to be inspected, and the second portion has the thickness of the arc portion smaller than that of the first portion. The first portion enables calibration corresponding to the same wall thickness as the inspected pipe, and the second portion enables calibration corresponding to a thinner wall thickness than the inspected pipe, for example, the depth of the defect. For this reason,
The actual measurement data can be appropriately and easily calibrated according to the thickness of the standard test piece, and the defect detection performance can be made constant with respect to various defect depths.
【0012】また、被検査配管の口径が異なっても、被
検査配管と同一の外径及び肉厚のものを使用することに
より、感度を一定に調整することができる。このため、
被検査配管の口径に応じて感度の調整を適切、かつ、容
易にすることができる。Even if the pipes to be inspected have different diameters, the sensitivity can be adjusted to a constant value by using the pipes having the same outer diameter and thickness as the pipes to be inspected. For this reason,
The sensitivity can be adjusted appropriately and easily according to the diameter of the pipe to be inspected.
【0013】第2の部分は、内周面に凹部を有している
から、開口径に応じた校正が可能となる。このため、実
際の測定データを開口径に応じて適切、かつ、容易に校
正でき、各種の欠陥の大きさに対して欠陥検出性能を一
定にすることができる。更に具体的には、管用テーパね
じの結合端部の谷の径は、一般に被検査配管の肉厚の略
半分になるので、第2の部分の肉厚を第1の部分の肉厚
の半分に設定しつつ、第2の部分の内周面に凹部を設け
ることにより、管用テーパねじの結合部端部、すなわ
ち、最も漏水しやすい位置における欠陥の大きさを高精
度で検出できる。 Since the second portion has the concave portion on the inner peripheral surface, it is possible to calibrate according to the opening diameter. Therefore, the actual measurement data can be appropriately and easily calibrated according to the opening diameter, and the defect detection performance can be made constant with respect to various defect sizes. More specifically, it is a taper for pipes
Generally, the diameter of the valley at the joint end is approximately the thickness of the pipe to be inspected.
Since it is halved, the thickness of the second part should be the same as the thickness of the first part.
While setting it to half of that, provide a recess on the inner peripheral surface of the second part.
The pipe end of the taper screw,
The size of the defect at the position where the water leaks most easily
It can be detected in degrees.
【0014】第1の部分は、円弧部分の内周面側に開口
径が異なる複数個の別の凹部を有しているから、感度の
調整及び欠陥の大きさの校正を同一試験片で行なうこと
ができる。例えば、別の凹部の深さを第1の部分の肉厚
の半分とし、第1の部分と第2の部分とが形成する段差
と同じくすると、別の凹部の深さから欠陥の深さが校正
され、別の凹部の開口径から欠陥の大きさが校正され、
被検査配管の劣化度の目安となる肉厚の半分の位置にお
ける欠陥の大きさを正確に測定できる。Since the first portion has a plurality of different concave portions having different opening diameters on the inner peripheral surface side of the arc portion, sensitivity adjustment and defect size calibration are performed on the same test piece. be able to. For example, if the depth of another recess is half the thickness of the first portion and is the same as the step formed by the first portion and the second portion, the depth of the defect can be changed from the depth of another recess. Calibrated, the size of the defect is calibrated from the opening diameter of another recess,
It is possible to accurately measure the size of a defect at a position half the wall thickness, which is a measure of the deterioration degree of the pipe to be inspected.
【0015】[0015]
【実施例】図1は本発明に係る配管非破壊検査用標準試
験片の正面図、図2は同じく平面図、図3は図1のC3
ーC3線上断面図である。図示の標準試験片は、管用テ
ーパねじの結合部の腐食劣化を評価するために好適な試
験片を示している。以下、図4の配管非破壊検査方法の
測定状態を参照しながら図1〜図3を説明する。FIG. 1 is a front view of a standard test piece for pipe nondestructive inspection according to the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is C3 of FIG.
It is a cross-sectional view taken along the line C3. The standard test piece shown in the drawing shows a test piece suitable for evaluating the corrosion deterioration of the joint portion of the taper screw for a pipe. 1 to 3 will be described below with reference to the measurement state of the pipe nondestructive inspection method of FIG.
【0016】図示の標準試験片1は、第1の部分11
と、第2の部分12とを含んでいる。第1の部分11
は、円弧部分Aが被検査配管3と同一の外径R1及び肉
厚L1となっている。第2の部分12は、円弧部分Bの
外周面B1が第1の部分11の外周面A1の曲率と同一
曲率となっており、肉厚L2が第1の部分11の肉厚L
1よりも薄くなっている。第2の部分12の肉厚L2
は、検出したい欠陥の深さL3を最も精度よく校正でき
るように設定してある。第1の部分11及び第2の部分
12は、被試験配管3を軸方向に切断して短冊状として
もよく、径方向に切断して輪状としてもよい。標準試験
片1の材質は、被検査配管3と同一材質であることが最
も適切であるが、相関関係が明確であれば他の材質のも
のでもよい。校正精度を上げるには、肉厚の種類を増し
てやればよい。The illustrated standard test piece 1 includes a first portion 11
And a second portion 12. First part 11
The arc portion A has the same outer diameter R1 and wall thickness L1 as the pipe 3 to be inspected. In the second portion 12, the outer peripheral surface B1 of the arc portion B has the same curvature as the outer peripheral surface A1 of the first portion 11, and the wall thickness L2 is the wall thickness L of the first portion 11.
It is thinner than 1. Wall thickness L2 of the second portion 12
Is set so that the depth L3 of the defect to be detected can be calibrated with the highest accuracy. The first portion 11 and the second portion 12 may be formed by cutting the pipe 3 under test in the axial direction into a strip shape, or may be cut in the radial direction into a ring shape. The standard test piece 1 is most preferably made of the same material as the pipe 3 to be inspected, but may be made of another material as long as the correlation is clear. In order to improve the calibration accuracy, it is sufficient to increase the type of wall thickness.
【0017】上述したように、第1の部分11は円弧部
分Aが被検査配管3と同一の外径R1となっており、第
2の部分12は円弧部分Bの外周面B1が第1の部分1
1の外周面A1の曲率と同一曲率となっているから、実
際の被検査配管3の測定状態と標準試験片1の測定状態
とが同一の関係となり、被検査配管3の測定と、標準試
験片1の測定とを対にして行ない両者を比較すると、感
度を一定の状態に保つことができる。As described above, the arc portion A of the first portion 11 has the same outer diameter R1 as the pipe 3 to be inspected, and the second portion 12 has the outer peripheral surface B1 of the arc portion B of the first portion 11. Part 1
Since the curvature is the same as the curvature of the outer peripheral surface A1 of No. 1, the actual measurement state of the pipe 3 to be inspected and the measurement state of the standard test piece 1 have the same relationship, and the measurement of the pipe 3 to be inspected and the standard test The sensitivity can be kept constant by comparing the measurement of piece 1 with that of the piece 1.
【0018】第1の部分11は円弧部分Aが被検査配管
3と同一の肉厚L1となっており、第2の部分12は、
円弧部分Bの肉厚L2が第1の部分11の肉厚L1より
も薄くなっているから、第1の部分11により被検査配
管3と同一の肉厚に対応した校正が可能となり、第2の
部分12により被検査配管3より薄い肉厚、例えば欠陥
の深さに対応した校正が可能となる。このため、実際の
測定データを肉厚に応じて適切、かつ、容易に校正で
き、各種の欠陥の深さに対して欠陥検出性能を一定にす
ることができる。The arc portion A of the first portion 11 has the same wall thickness L1 as the pipe 3 to be inspected, and the second portion 12 is
Since the wall thickness L2 of the arc portion B is smaller than the wall thickness L1 of the first portion 11, the first portion 11 enables calibration corresponding to the same wall thickness as the pipe 3 to be inspected, and the second portion The portion 12 makes it possible to perform calibration corresponding to the thickness smaller than that of the pipe 3 to be inspected, for example, the depth of a defect. Therefore, the actual measurement data can be appropriately and easily calibrated according to the wall thickness, and the defect detection performance can be made constant with respect to various defect depths.
【0019】また、被検査配管3の口径が異なっても、
被検査配管3と同一の外径R1及び肉厚L1のものを使
用することにより、感度を一定に調整することができ
る。このため、被検査配管3の口径に応じて感度の調整
を適切、かつ、容易にし得る非破壊検査用の標準試験片
を提供することができる。その結果、肉厚が6ミリ以下
の配管も適切に測定できる。更に、感度調整の頻度が減
少するため、ディレー材21の摩耗も減少し、感度調整
回数は相乗的に減少する。Further, even if the pipe 3 to be inspected has a different diameter,
By using the pipe having the same outer diameter R1 and wall thickness L1 as the pipe 3 to be inspected, the sensitivity can be adjusted to be constant. Therefore, it is possible to provide a standard test piece for nondestructive inspection that can appropriately and easily adjust the sensitivity according to the diameter of the pipe 3 to be inspected. As a result, pipes with a wall thickness of 6 mm or less can be measured appropriately. Furthermore, since the frequency of sensitivity adjustment is reduced, the wear of the delay material 21 is also reduced, and the number of times of sensitivity adjustment is synergistically reduced.
【0020】また、図示の標準試験片1は、第2の部分
12の肉厚L2は、第1の部分11の肉厚L1の半分で
ある。管用テーパねじの結合端部の谷の径は、一般に被
検査配管3の肉厚の略半分になる。このため、測定対象
の被検査配管3を測定し、標準試験片1により校正する
と、最も漏水しやすい位置の欠陥を高精度で検出でき
る。Further, in the illustrated standard test piece 1, the thickness L2 of the second portion 12 is half the thickness L1 of the first portion 11. The diameter of the valley at the coupling end of the pipe taper screw is generally about half the wall thickness of the pipe 3 to be inspected. Therefore, if the pipe 3 to be inspected, which is the object of measurement, is measured and calibrated with the standard test piece 1, the defect at the position where water is most likely to leak can be detected with high accuracy.
【0021】更に、図示の標準試験片1は、第2の部分
12が内周面B2に開口径d1〜d3の凹部121〜1
23を有している。凹部121〜123は、人工欠陥で
あり、深さが同一の円形平底形状となっている。凹部1
21〜123は、円周方向に配列されている。凹部12
1〜123の底面は円弧状でもよい。超音波測定器は、
発振周波数が5MHzのものが一般に使用される。この
発振周波数では検出できる欠陥の大きさは一般に5ミリ
以内である。開口径d1〜d3は、5ミリ以内の範囲に
おいて検出したい欠陥の大きさに合わせて設定すればよ
く、実施例は0.4、0.5、0.6ミリに設定してあ
る。このように、第2の部分12は、内周面120に開
口径d1〜d3の凹部121〜123を有しているか
ら、実際の測定データを開口径d1〜d3に応じて適
切、かつ、容易に校正でき、各種の欠陥の大きさに対し
て欠陥検出性能を一定にすることができる。このため、
測定対象の被検査配管3を測定し、標準試験片1により
校正すると、最も漏水しやすい位置における欠陥の大き
さを高精度で検出できる。凹部121〜123は、円周
方向に配列されているので、軸方向の長さが少なくて済
む。このため、小型で取り扱い易く、携帯に便利な標準
試験片1が得られる。また、準試験片1は、全体として
円弧状であるから、外部から凹部121〜123を見る
ことができ、建築現場において、作業者が校正作業を容
易に行うことができる。 Further, in the illustrated standard test piece 1, the second portion 12 has concave portions 121 to 1 having opening diameters d1 to d3 on the inner peripheral surface B2.
Has 23. The recesses 121 to 123 are artificial defects and have a circular flat bottom shape with the same depth. Recess 1
21-123 are arranged in the circumferential direction. Recess 12
The bottom surfaces of 1-123 may be arcuate. The ultrasonic measuring device
An oscillation frequency of 5 MHz is generally used. The size of the defect that can be detected at this oscillation frequency is generally within 5 mm. The opening diameters d1 to d3 may be set according to the size of the defect to be detected within a range of 5 mm, and in the embodiment, they are set to 0.4, 0.5 and 0.6 mm. As described above, since the second portion 12 has the concave portions 121 to 123 having the opening diameters d1 to d3 on the inner peripheral surface 120, the actual measurement data is appropriate according to the opening diameters d1 to d3, and It can be easily calibrated and the defect detection performance can be made constant with respect to various defect sizes. For this reason,
By measuring the inspected pipe 3 to be measured and calibrating with the standard test piece 1, the size of the defect at the position where water is most likely to leak can be detected with high accuracy. The recesses 121 to 123 are the circumference
Since it is arranged in the direction, the axial length is small.
Mu. For this reason, it is a standard that is small and easy to handle, and convenient to carry.
The test piece 1 is obtained. In addition, the quasi-test piece 1 as a whole
Since it has an arc shape, the recesses 121 to 123 are viewed from the outside.
Therefore, the operator can perform the calibration work at the construction site.
It can be done easily.
【0022】更にまた、図示の標準試験片1は、第1の
部分11が内周面側A2に開口径d4〜d6の別の凹部
111〜113を有している。開口径d4〜d6は、そ
れぞれ開口径d1〜d3に対応している。このように、
第1の部分11は、内周面側110に開口径d4〜d6
の別の凹部111〜113を有しているから、感度の調
整及び欠陥の大きさの校正を同一試験片で行なうことが
できる。例えば、図示はしないが、別の凹部111〜1
13の深さを第1の部分11の肉厚L1の半分とし、第
1の部分11と第2の部分12とが形成する段差L3と
同じくすると、別の凹部111〜113の深さL3から
欠陥の深さが校正され、別の凹部111〜113の開口
径d4〜d6から欠陥の大きさが校正され、被検査配管
3の劣化度の目安となる肉厚L1の半分の位置における
欠陥の大きさを正確に測定できる。Furthermore, in the illustrated standard test piece 1, the first portion 11 has other concave portions 111 to 113 having opening diameters d4 to d6 on the inner peripheral surface side A2. The opening diameters d4 to d6 correspond to the opening diameters d1 to d3, respectively. in this way,
The first portion 11 has opening diameters d4 to d6 on the inner peripheral surface side 110.
Since the other concave portions 111 to 113 are provided, sensitivity adjustment and defect size calibration can be performed with the same test piece. For example, although not shown, the other recesses 111 to 1
If the depth of 13 is half the thickness L1 of the first portion 11 and is the same as the step L3 formed by the first portion 11 and the second portion 12, from the depth L3 of the other concave portions 111 to 113, The depth of the defect is calibrated, and the size of the defect is calibrated from the opening diameters d4 to d6 of the other recesses 111 to 113. The size can be measured accurately.
【0023】また、凹部121〜123の深さを第2の
部分12の厚みL2の半分に設定すると、被検査配管3
の劣化度の目安となる肉厚L1の半分よりも更に深い位
置における欠陥の大きさを正確に測定できる。If the depth of the recesses 121 to 123 is set to half the thickness L2 of the second portion 12, the pipe 3 to be inspected
It is possible to accurately measure the size of the defect at a position deeper than half of the wall thickness L1 which is a measure of the deterioration degree.
【0024】図示の標準試験片1は、第1の部分11及
び第2の部分12が一体に形成されている。このため、
測定効率が向上するとともに、外乱の影響を受けにくく
なり、測定データの信頼性も向上する。In the illustrated standard test piece 1, a first portion 11 and a second portion 12 are integrally formed. For this reason,
The measurement efficiency is improved, the influence of external disturbance is reduced, and the reliability of the measurement data is improved.
【0025】[0025]
【発明の効果】以上述べたように、本発明によれば、次
のような効果が得られる。
(a)被検査配管の口径に応じて感度の調整を適切、か
つ、容易にし得る配管非破壊検査用の標準試験片を提供
できる。
(b)欠陥の大きさを校正し得る配管非破壊検査用の標
準試験片を提供できる。
(c)感度の調整及び欠陥の大きさの校正を同一試験片
で行ない得る配管非破壊検査用の標準試験片を提供でき
る。As described above, according to the present invention, the following effects can be obtained. (A) It is possible to provide a standard test piece for pipe nondestructive inspection, which can appropriately and easily adjust the sensitivity according to the diameter of the pipe to be inspected. (B) A standard test piece for pipe nondestructive inspection capable of calibrating the size of defects can be provided. (C) It is possible to provide a standard test piece for pipe non-destructive inspection in which sensitivity adjustment and defect size calibration can be performed on the same test piece.
【図1】本発明に係る配管非破壊検査用標準試験片の正
面図である。FIG. 1 is a front view of a standard test piece for pipe nondestructive inspection according to the present invention.
【図2】本発明に係る配管非破壊検査用標準試験片の平
面図である。FIG. 2 is a plan view of a standard test piece for pipe nondestructive inspection according to the present invention.
【図3】図1のC3ーC3線上断面図である。3 is a cross-sectional view taken along the line C3-C3 of FIG.
【図4】超音波測定器を使用した配管非破壊検査方法の
測定状態を示す図である。FIG. 4 is a diagram showing a measurement state of a pipe nondestructive inspection method using an ultrasonic measuring device.
【図5】従来の配管非破壊検査用標準試験片の斜視図で
ある。FIG. 5 is a perspective view of a conventional standard test piece for pipe nondestructive inspection.
1 配管断片 11 第1の部分 A 円弧部分 A1 外周面 A2 内周面 111〜113 別の凹部 12 第2の部分 B 円弧部分 B1 外周面 B2 内周面 121〜123 凹部 2 探触子 3 被検査配管 R1 外径 L1 第1の部分の肉厚 L2 第2の部分の肉厚 L3 段差 1 pipe fragment 11 First part A arc part A1 outer peripheral surface A2 inner peripheral surface 111-113 different recesses 12 Second part B arc part B1 outer peripheral surface B2 inner peripheral surface 121-123 recess 2 probe 3 Inspected pipe R1 outer diameter L1 First part wall thickness L2 second part wall thickness L3 step
Claims (3)
非破壊検査用の標準試験片であって、 前記第1の部分及び前記第2の部分は、一体に形成さ
れ、全体として円弧状であり、 前記第1の部分は、被検査配管と同一の外径及び肉厚で
あり、 前記第2の部分は、内周面に凹部を有し、外周面が前記
第1の部分の外周面の曲率と同一曲率であって、肉厚が
前記第1の部分の肉厚の半分である配管非破壊検査用標
準試験片。1. A standard test piece for pipe non-destructive inspection, comprising a first part and a second part, wherein the first part and the second part are integrally formed and formed as a whole. The first portion has the same outer diameter and wall thickness as the pipe to be inspected, and the second portion has a concave portion on the inner peripheral surface and the outer peripheral surface has the first portion. A standard test piece for pipe non-destructive inspection, which has the same curvature as the outer peripheral surface of the portion and whose wall thickness is half the wall thickness of the first portion.
面に開口径が異なる複数個の別の凹部を有している請求
項1に記載の配管非破壊検査用標準試験片。2. The standard test piece for pipe nondestructive inspection according to claim 1, wherein the first portion has a plurality of different concave portions having different opening diameters on the inner peripheral surface of the arc portion.
厚の半分である請求項2に記載の配管非破壊検査用標準
試験片。3. The standard test piece for pipe nondestructive inspection according to claim 2, wherein the depth of the another recess is half the thickness of the first portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18196693A JP3413249B2 (en) | 1993-06-28 | 1993-06-28 | Standard specimen for non-destructive inspection of piping |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18196693A JP3413249B2 (en) | 1993-06-28 | 1993-06-28 | Standard specimen for non-destructive inspection of piping |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0727750A JPH0727750A (en) | 1995-01-31 |
JP3413249B2 true JP3413249B2 (en) | 2003-06-03 |
Family
ID=16109985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18196693A Expired - Fee Related JP3413249B2 (en) | 1993-06-28 | 1993-06-28 | Standard specimen for non-destructive inspection of piping |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3413249B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103472140A (en) * | 2013-09-05 | 2013-12-25 | 中国科学院声学研究所 | Ultrasonic phased array imaging flaw detection intensity calibrating method |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105424816B (en) * | 2015-12-14 | 2019-08-23 | 华北电力科学研究院有限责任公司 | A kind of sensitivity calibration platform of Shaft testing tool |
CN106198762B (en) * | 2016-06-30 | 2019-09-13 | 中车戚墅堰机车车辆工艺研究所有限公司 | Low-floor tramcar wheel ultrasound detection sample block and its test method |
-
1993
- 1993-06-28 JP JP18196693A patent/JP3413249B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103472140A (en) * | 2013-09-05 | 2013-12-25 | 中国科学院声学研究所 | Ultrasonic phased array imaging flaw detection intensity calibrating method |
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Publication number | Publication date |
---|---|
JPH0727750A (en) | 1995-01-31 |
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