JP3389209B2 - Method and system for selecting priority inspection locations for piping - Google Patents
Method and system for selecting priority inspection locations for pipingInfo
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- JP3389209B2 JP3389209B2 JP2000250543A JP2000250543A JP3389209B2 JP 3389209 B2 JP3389209 B2 JP 3389209B2 JP 2000250543 A JP2000250543 A JP 2000250543A JP 2000250543 A JP2000250543 A JP 2000250543A JP 3389209 B2 JP3389209 B2 JP 3389209B2
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- Prior art keywords
- pipe
- inspection
- displacement amount
- selecting
- priority
- Prior art date
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、配管で優先的に検
査する箇所を選定する方法及びそのシステムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and system for selecting a place to be inspected preferentially in piping.
【０００２】[0002]
【従来の技術】火力発電プラントや原子力発電プラント
などでボイラとタービンとの間を接続する高温配管（直
径：約１ｍ、肉厚：約１００ｍｍ）においては、その溶
接部が超音波探傷試験（Ultrasonic Test:ＵＴ）法やＴ
ＯＦＤ（Time of Flight Diffraction）法などのような
非破壊検査法により定期的に検査され、亀裂の有無やそ
の長さ等から寿命を診断している。2. Description of the Related Art In a high-temperature pipe (diameter: about 1 m, wall thickness: about 100 mm) for connecting a boiler and a turbine in a thermal power plant or a nuclear power plant, the welded portion has an ultrasonic flaw detection test (Ultrasonic Test: UT) method and T
It is regularly inspected by a non-destructive inspection method such as OFD (Time of Flight Diffraction) method, and the life is diagnosed by the presence or absence of cracks and the length thereof.
【０００３】このような高温配管の検査においては、当
該配管の全長が長く（約１００ｍ）、溶接部が多いため
（約５０箇所）、設計図面の構造から求められる弾性応
力解析の結果に基づいて、特に大きな応力のかかる溶接
部を数箇所選定して優先的に検査し、当該溶接部の検査
結果から、他の溶接部（負荷の小さな溶接部）の検査の
有無やその検査内容等を決定することにより、検査作業
の効率化を図るようにしている。In the inspection of such high temperature piping, since the total length of the piping is long (about 100 m) and there are many welded portions (about 50 places), based on the result of elastic stress analysis obtained from the structure of the design drawing. , We select several welds that are subject to particularly large stress and inspect them preferentially, and determine from the inspection results of the welds whether or not to inspect other welds (welds with a small load) and their inspection contents. By doing so, the efficiency of the inspection work is improved.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前述し
たようにして検査した溶接部の測定結果を検討してみる
と、前述したような弾性応力解析の結果に基づいて選定
された応力の大きな溶接部の損傷が大きくなっていると
は必ずしも限らないことがあった。However, considering the measurement results of the welds inspected as described above, the welds having a large stress selected based on the results of the elastic stress analysis as described above. The damage was not always great.
【０００５】このようなことから、本発明は、優先的に
検査する箇所を高い信頼性で選定することができる配管
の優先検査箇所選定方法及びそのシステムを提供するこ
とを目的とする。In view of the above, an object of the present invention is to provide a method and system for selecting a priority inspection point for piping, which can select a point to be inspected preferentially with high reliability.
【０００６】[0006]
【課題を解決するための手段】前述した課題を解決する
ための、第一番目の発明による配管の優先検査箇所選定
方法は、複数箇所を拘束支持された配管の複数の検査箇
所から優先的に検査する箇所を選定する方法において、
前記配管の拘束支持箇所の当初の位置からの変位量をそ
れぞれ測定し、当該変位量に基づいて、当該配管の検査
箇所の応力解析を行って、当該配管の優先的に検査する
箇所を選定することを特徴とする。In order to solve the above-mentioned problems, a method for selecting a priority inspection point for a pipe according to the first aspect of the invention is to preferentially select from a plurality of inspection points of a pipe whose plural points are restrained and supported. In the method of selecting the inspection point,
The displacement amount from the initial position of the restraint supporting portion of the pipe is measured, and the stress analysis of the inspection portion of the pipe is performed based on the displacement amount to select the inspection portion of the pipe with priority. It is characterized by
【０００７】第二番目の発明による配管の優先検査箇所
選定方法は、第一番目の発明において、前記応力解析
が、前記配管の温度、内部圧力および使用時間に基づい
て求められる当該配管の材料特性を考慮して行われてい
ることを特徴とする。The pipe preferential inspection location selecting method according to the second aspect of the present invention is the first aspect of the present invention, wherein the stress analysis is performed on the basis of the temperature, the internal pressure and the operating time of the pipe, and the material characteristics of the pipe. It is characterized in that it is performed in consideration of.
【０００８】第三番目の発明による配管の優先検査箇所
選定方法は、第二番目の発明において、前記配管の材料
特性が、当該配管の温度および内部圧力から求められる
応力から当該配管の材料のクリープ速度を求めて、当該
クリープ速度と当該配管の使用時間とからクリープ歪み
を算出して、予め求められている上記材料の応力と歪み
との特性関係に当該クリープ歪みを考慮したものである
ことを特徴とする。The preferential inspection location selecting method for a pipe according to the third aspect of the present invention is the method according to the second aspect, wherein the material characteristic of the pipe is the creep of the material of the pipe from the stress obtained from the temperature and the internal pressure of the pipe. Obtain the speed, calculate the creep strain from the creep speed and the usage time of the pipe, and consider the creep strain in the characteristic relationship between the stress and the strain of the material that is obtained in advance. Characterize.
【０００９】第四番目の発明による配管の優先検査箇所
選定方法は、第二番目または第三番目の発明において、
前記配管の材料特性に基づいて、当該配管の前記拘束支
持箇所の前記変位量から当該拘束支持箇所にかかる荷重
を求め、当該荷重から当該配管の検査箇所に作用する応
力解析を行うことを特徴とする。According to a fourth aspect of the present invention, there is provided a method for selecting a priority inspection point of a pipe according to the second or third aspect,
Based on the material characteristics of the pipe, the load applied to the restraint support place is obtained from the displacement amount of the restraint support place of the pipe, and stress analysis that acts on the inspection place of the pipe from the load is performed. To do.
【００１０】第五番目の発明による配管の優先検査箇所
選定方法は、第一番目から第四番目の発明のいずれかに
おいて、前記応力解析の結果に対して、前記配管の検査
箇所の材料中の不純物量と当該検査箇所の損傷速度との
関係を考慮することを特徴とする。According to a fifth aspect of the present invention, there is provided a method of selecting a priority inspection point for a pipe, wherein in any one of the first to fourth aspects of the invention, the material of the inspection point of the pipe is compared with the result of the stress analysis. It is characterized in that the relationship between the amount of impurities and the damage rate of the inspection location is taken into consideration.
【００１１】第六番目の発明による配管の優先検査箇所
選定方法は、第一番目から第五番目の発明のいずれかに
おいて、前記配管の前記変位量を室温と使用温度とでそ
れぞれ測定し、室温での当該変位量および使用温度での
当該変位量を各々用いて当該配管の検査箇所の応力解析
をそれぞれ行って、当該配管の優先的に検査する箇所を
選定することを特徴とする。According to a sixth aspect of the present invention, there is provided a method for selecting a priority inspection point for a pipe, wherein in any one of the first to fifth aspects, the displacement amount of the pipe is measured at room temperature and operating temperature, respectively. The stress analysis of the inspection location of the pipe is carried out by using the displacement quantity in step 1 and the displacement quantity in use temperature, respectively, and the location of the pipe to be inspected preferentially is selected.
【００１２】また、前述した課題を解決するための、第
七番目の発明による配管の優先検査箇所選定システム
は、複数箇所を拘束支持された配管の複数の検査箇所か
ら優先的に検査する箇所を選定するシステムであって、
前記配管の拘束支持箇所の当初の位置からの変位量をそ
れぞれ測定する変位量測定手段と、前記変位量測定手段
で求められた前記変位量に基づいて、当該配管の検査箇
所の応力解析を行って、当該配管の優先的に検査する箇
所を選定する優先検査箇所選定手段とを備えたことを特
徴とする。Further, in order to solve the above-mentioned problems, the pipe preferential inspection location selection system according to the seventh aspect of the present invention selects a location to be preferentially inspected from a plurality of inspection locations of a pipe supported and restrained at a plurality of locations. A system to select,
Based on the displacement amount measuring means for measuring the displacement amount from the initial position of the restraint supporting portion of the pipe, and the displacement amount obtained by the displacement amount measuring means, stress analysis of the inspection portion of the pipe is performed. And a preferential inspection location selecting means for selecting a priority inspection location of the pipe.
【００１３】第八番目の発明による配管の優先検査箇所
選定システムは、第七番目の発明において、前記優先検
査箇所選定手段が、前記配管の温度、内部圧力および使
用時間に基づいて求められる当該配管の材料特性を考慮
して行うことを特徴とする。The pipe preferential inspection location selection system according to an eighth aspect of the present invention is the pipe according to the seventh aspect, wherein the preferential inspection location selection means is determined based on the temperature, internal pressure and use time of the pipe. It is characterized in that it is performed in consideration of the material characteristics of.
【００１４】第九番目の発明による配管の優先検査箇所
選定システムは、第八番目の発明において、前記配管の
材料特性が、当該配管の温度および内部圧力から求めら
れる応力から当該配管の材料のクリープ速度を求めて、
当該クリープ速度と当該配管の使用時間とからクリープ
歪みを算出して、予め求められている上記材料の応力と
歪みとの特性関係に当該クリープ歪みを考慮したもので
あることを特徴とする。The pipe preferential inspection location selection system according to the ninth invention is the pipe inspection method according to the eighth invention, wherein the material characteristic of the pipe is the creep of the material of the pipe from the stress obtained from the temperature and the internal pressure of the pipe. For speed,
The creep strain is calculated from the creep speed and the usage time of the pipe, and the creep strain is taken into consideration in the characteristic relationship between the stress and the strain of the material which is obtained in advance.
【００１５】第十番目の発明による配管の優先検査箇所
選定システムは、第八番目または第九番目の発明におい
て、前記優先検査箇所選定手段が、前記配管の材料特性
に基づいて、当該配管の前記拘束支持箇所の前記変位量
から当該拘束支持箇所にかかる荷重を求め、当該荷重か
ら当該配管の検査箇所に作用する応力解析を行うことを
特徴とする。The preferential inspection point selecting system for piping according to the tenth aspect of the invention is the eighth or ninth aspect of the present invention, wherein the preferential inspection point selecting means is arranged so that the preferential inspection point of the pipe is based on material characteristics of the pipe. It is characterized in that a load applied to the restraint supporting place is obtained from the displacement amount of the restraint supporting place, and a stress analysis acting on the inspection place of the pipe is performed from the load.
【００１６】第十一番目の発明による配管の優先検査箇
所選定システムは、第七番目から第十番目の発明のいず
れかにおいて、前記優先検査箇所選定手段が、前記応力
解析の結果に対して、前記配管の検査箇所の材料中の不
純物量と当該検査箇所の損傷速度との関係を考慮するこ
とを特徴とする。In the pipe priority inspection location selection system according to the tenth aspect of the invention, in any one of the seventh to tenth aspects of the invention, the priority inspection location selection means is The relationship between the amount of impurities in the material at the inspection point of the pipe and the damage rate at the inspection point is considered.
【００１７】第十二番目の発明による配管の優先検査箇
所選定システムは、第七番目から第十一番目の発明のい
ずれかにおいて、前記変位量測定手段が、前記配管の前
記変位量を室温と使用温度とでそれぞれ測定し、前記優
先検査箇所選定手段が、室温での前記変位量および使用
温度での前記変位量を各々用いて前記配管の検査箇所の
応力解析をそれぞれ行って、当該配管の優先的に検査す
る箇所を選定することを特徴とする。According to a twelfth aspect of the invention, in the pipe preferential inspection location selection system according to any one of the seventh to tenth aspects of the invention, the displacement amount measuring means sets the displacement amount of the pipe to room temperature. Measured respectively with the operating temperature, the priority inspection point selecting means performs stress analysis of the inspection point of the pipe by using the displacement amount at room temperature and the displacement amount at the operating temperature, respectively, and The feature is that the location to be inspected is selected preferentially.
【００１８】[0018]
【発明の実施の形態】本発明による配管の優先検査箇所
選定方法及びそのシステムを、火力発電プラントや原子
力発電プラントなどのボイラとタービンとを接続する高
温配管の溶接部の検査に適用する場合の実施の形態を図
１〜５を用いて説明する。図１は、高温配管の配置状態
の説明図、図２は、優先検査箇所選定方法の手順説明
図、図３は、応力解析法の説明図、図４は、経年変化し
た材料特性の算出方法の説明図、図５は、損傷データベ
ースの一例である材料中の不純物量と損傷速度との関係
を表すグラフである。BEST MODE FOR CARRYING OUT THE INVENTION In the case where the method and system for selecting a priority inspection point of a pipe according to the present invention are applied to an inspection of a welded portion of a high temperature pipe connecting a boiler and a turbine of a thermal power plant or a nuclear power plant. An embodiment will be described with reference to FIGS. FIG. 1 is an explanatory view of the arrangement state of high-temperature pipes, FIG. 2 is an explanatory view of a procedure of a priority inspection point selection method, FIG. 3 is an explanatory view of a stress analysis method, and FIG. 4 is a calculation method of material characteristics that have changed over time. And FIG. 5 is a graph showing the relationship between the amount of impurities in the material and the damage rate, which is an example of the damage database.
【００１９】図１に示すように、火力発電プラントや原
子力発電プラントなどのボイラとタービンとを接続する
高温配管（直径：約１ｍ、肉厚：約１００ｍｍ）１は、
プラント設備の配置状態に応じたルートを経るように直
管とエルボ管とが組み合わされて多数（約５０本）溶接
接合されている（全長：約１００ｍ）。このような高温
配管１は、複数箇所（１０〜２０箇所程度）がハンガ２
により構造物等に拘束支持されている。As shown in FIG. 1, a high temperature pipe (diameter: about 1 m, wall thickness: about 100 mm) 1 connecting a boiler and a turbine of a thermal power plant or a nuclear power plant is
A large number (about 50) of straight pipes and elbow pipes are combined and welded (total length: about 100 m) so as to go through a route according to the arrangement state of plant equipment. In such a high-temperature pipe 1, a plurality of places (about 10 to 20 places) have hangers 2.
Are constrained and supported by structures and the like.
【００２０】このような高温配管１においては、内部に
高温高圧の蒸気が流れ、その溶接部１ａが損傷しやすい
ため、当該溶接部１ａを定期的に検査する必要がある。
このとき、特に大きな応力のかかる溶接部１ａを数箇所
選定して優先的に検査し、当該溶接部１ａの検査結果か
ら、他の溶接部（負荷の小さな溶接部）１ａの検査の有
無やその検査内容等を決定することにより、検査作業の
効率化を図ることができる。In such a high-temperature pipe 1, since high-temperature and high-pressure steam flows inside and the welded portion 1a is easily damaged, it is necessary to regularly inspect the welded portion 1a.
At this time, the welding portion 1a to which a particularly large stress is selected is preferentially inspected, and from the inspection result of the welding portion 1a, the presence or absence of the inspection of the other welding portion (welding portion having a small load) 1a The efficiency of the inspection work can be improved by determining the inspection contents and the like.
【００２１】このような高温配管１の優先検査箇所の選
定には、高温配管１の室温から使用温度（約５５０℃）
への温度変化に伴う弾性変形δe を考慮し、設計図面の
構造に基づく弾性応力解析行われていた。In order to select such a priority inspection point of the high-temperature pipe 1, the temperature of the high-temperature pipe 1 from the room temperature to the operating temperature (about 550 ° C.)
The elastic stress analysis based on the structure of the design drawing has been performed in consideration of the elastic deformation δ e due to the temperature change to.
【００２２】しかしながら、長期にわたって使用された
（数年〜２０年）高温配管１においては、長期高温使用
によるクリープ変形δc を生じてしまっているため、上
記クリープ変形δc も併せて考慮した弾塑性応力解析
（非弾性応力解析）を行う必要がある。However, in the high temperature pipe 1 that has been used for a long time (several years to 20 years), creep deformation δ c has occurred due to long-term high temperature use, so the above-mentioned creep deformation δ c is also taken into consideration. It is necessary to perform plastic stress analysis (inelastic stress analysis).
【００２３】さらに、高温配管１は、ハンガ２により拘
束支持されているため、上記応力解析を行うにあたっ
て、当該拘束支持による影響も考慮しなければならな
い。Further, since the high temperature pipe 1 is constrained and supported by the hanger 2, it is necessary to consider the influence of the constrained support when performing the stress analysis.
【００２４】このとき、上記ハンガ２は、高温配管１の
上述した弾性変形δe やクリープ変形δc により、その
高温配管１のハンガ２による拘束支持位置（ハンガ点）
２ａが次第に変位していってしまう。このため、長期に
わたって使用された（数年〜２０年）高温配管１におい
て、ハンガ２による拘束支持の影響を考慮する際には、
当初のハンガ点２ａからの変位δの大きさを実測し、当
該変位δによる高温配管１への影響を考慮しなければな
らないのである。At this time, the hanger 2 is restrained and supported (hanger point) by the hanger 2 of the high temperature pipe 1 due to the elastic deformation δ e and the creep deformation δ c of the high temperature pipe 1 described above.
2a is gradually displaced. Therefore, when considering the influence of restraint support by the hanger 2 in the high-temperature pipe 1 that has been used for a long time (several years to 20 years),
It is necessary to measure the magnitude of the displacement δ from the original hanger point 2a and consider the influence of the displacement δ on the high temperature pipe 1.
【００２５】従来は、このような因子をすべて考慮する
ことなく設計図面の構造に基づく弾性応力解析の結果か
ら、大きな応力の作用する溶接部１ａを選定していたた
め、当該応力解析の結果に基づいて選定された溶接部１
ａの損傷が大きくなっているとは必ずしも限らなかっ
た。Conventionally, the welded portion 1a on which a large stress acts is selected from the result of elastic stress analysis based on the structure of the design drawing without considering all such factors, and therefore, based on the result of the stress analysis. Welded part 1 selected by
The damage of a was not always large.
【００２６】これに対し、本発明では、高温配管１のハ
ンガ点２ａの変位δを含めた上述の因子を考慮して応力
解析を行うことにより、損傷の大きい溶接部１ａを確実
に選定することができるようにしたのである。On the other hand, in the present invention, the stress analysis is carried out in consideration of the above-mentioned factors including the displacement δ of the hanger point 2a of the high temperature pipe 1, so that the welded portion 1a having a large damage is surely selected. Was made possible.
【００２７】このような高温配管１の優先検査箇所選定
方法を以下に具体的に説明する。A method for selecting a priority inspection location of the high temperature pipe 1 will be described below in detail.
【００２８】まず、図２に示すように、高温配管１のす
べてのハンガ点２ａ（約１０〜２０箇所）の変位δの大
きさをレーザ変位計などのような変位量測定手段により
それぞれ測定する。この変位δは、図３の応力解析法の
概念図に示すように、前述した弾性変形δe とクリープ
変形δc との和力により生じ、設計図面に基づいた当初
の位置と、レーザ変位計等により計測した現在の位置と
を比較することにより、容易に求めることができる。First, as shown in FIG. 2, the magnitudes of the displacements δ of all the hanger points 2a (about 10 to 20 places) of the high temperature pipe 1 are measured by displacement amount measuring means such as a laser displacement meter. . As shown in the conceptual diagram of the stress analysis method of FIG. 3, the displacement δ is generated by the sum of the elastic deformation δ e and the creep deformation δ c described above, and the initial position based on the design drawing and the laser displacement meter It can be easily obtained by comparing the present position measured by the above method.
【００２９】次に、高温配管１の上記変位δの大きさを
始めとして、温度、内部圧力、使用時間等を演算処理装
置などのような優先検査箇所選定手段に入力し、図２に
示すように、当該配管１の経年変化によるクリープ変形
δc を考慮した高温配管１の材料特性を上記温度、内部
圧力、使用時間等に基づいてデータベースから求める。Next, starting from the magnitude of the displacement δ of the high temperature pipe 1, the temperature, the internal pressure, the operating time, etc. are input to a priority inspection point selecting means such as an arithmetic processing unit, as shown in FIG. First, the material characteristics of the high-temperature pipe 1 in consideration of the creep deformation δ c of the pipe 1 due to secular change are obtained from the database based on the above temperature, internal pressure, usage time and the like.
【００３０】この高温配管１の材料特性は、図４に示す
ように、高温配管１の温度および内部圧力から求められ
る応力σから当該高温配管１の材料のクリープ速度を求
め、下記の式（１）に示すように、当該クリープ速度と
使用時間ｔとからクリープ歪みεc を算出して、予め求
められている上記材料の応力σと歪みεとの特性関係に
上記クリープ歪みεc を考慮することにより得ることが
できる。As shown in FIG. 4, the material characteristic of the high temperature pipe 1 is obtained by obtaining the creep rate of the material of the high temperature pipe 1 from the stress σ obtained from the temperature and the internal pressure of the high temperature pipe 1, ), The creep strain ε c is calculated from the creep speed and the use time t, and the creep strain ε c is considered in the characteristic relationship between the stress σ and the strain ε of the material which is obtained in advance. Can be obtained.
【数１】 [Equation 1]
【００３１】このようにして得られた高温配管１の材料
特性に基づいて、図３の非弾性解析の模式図に示すよう
に、上記変位δの大きさからハンガ点２ａにかかる荷重
Ｐが求められ、有限要素法に基づき、このハンガ点２ａ
にかかる荷重Ｐから高温配管１の溶接部１ａに作用する
応力解析を行う。Based on the material characteristics of the high temperature pipe 1 thus obtained, the load P applied to the hanger point 2a is obtained from the magnitude of the displacement δ as shown in the schematic diagram of the inelastic analysis of FIG. Based on the finite element method, this hanger point 2a
The stress applied to the welded portion 1a of the high-temperature pipe 1 from the load P applied to is analyzed.
【００３２】続いて、図２に示すように、上記応力解析
の結果に対して、高温配管１の溶接部１ａの損傷データ
ベースが考慮される。すなわち、溶接部１ａの材料中の
不純物量が多いと、溶接部１ａ中の傷の成長が早くなる
ことから、図５に示すように、溶接部１ａの材料中の不
純物量と損傷速度との関係が損傷データベースとして予
め入力され、予め求められている各溶接部１ａ中の不純
物量から上記応力解析の結果とあわせて解析されるので
ある。このようにして各溶接部１ａごとに求められた応
力解析の結果に基づいて、優先的に検査する溶接部１ａ
が選定される。Then, as shown in FIG. 2, the damage database of the welded portion 1a of the high temperature pipe 1 is considered for the result of the stress analysis. That is, when the amount of impurities in the material of the welded portion 1a is large, the growth of scratches in the welded portion 1a is accelerated, so that the amount of impurities in the material of the welded portion 1a and the damage rate are increased as shown in FIG. The relationship is preliminarily input as a damage database, and is analyzed together with the result of the stress analysis based on the amount of impurities in each welded portion 1a which is obtained in advance. In this way, the welded portion 1a to be preferentially inspected based on the result of the stress analysis obtained for each welded portion 1a.
Is selected.
【００３３】このようにして選定された溶接部１ａは、
高温配管１のハンガ点２ａの変位δを含めて上述した因
子が考慮されているので、特に損傷の大きい箇所である
確率が極めて高くなっている。The welded portion 1a thus selected is
Since the above-described factors including the displacement δ of the hanger point 2a of the high temperature pipe 1 are taken into consideration, the probability of being a particularly damaged portion is extremely high.
【００３４】したがって、本発明によれば、特に損傷の
大きい溶接部１ａを高い信頼性で選定することができる
ので、溶接部１ａの検査作業の効率化を図ることができ
る。Therefore, according to the present invention, since the welded portion 1a with particularly large damage can be selected with high reliability, the inspection work of the welded portion 1a can be made efficient.
【００３５】なお、本実施の形態では、高温配管１の前
記変位δの大きさを室温で求め、当該変位δの大きさに
基づいて高温配管１の各溶接部１ａの応力解析を行っ
て、高温配管１の優先的に検査する溶接部１ａを選定す
るようにしたが、例えば、高温配管１の前記変位δの大
きさを室温と使用温度とでそれぞれ測定し、室温での当
該変位δr および使用温度での当該変位δh を各々用い
て高温配管１の各溶接部１ａの応力解析をそれぞれ行っ
て、高温配管１の優先的に検査する箇所を選定すれば、
前述した弾性変形δe による影響をさらに考慮すること
ができるので、損傷の大きい溶接部１ａの選定にかかる
信頼性をさらに向上させることができる。In the present embodiment, the magnitude of the displacement δ of the high temperature pipe 1 is obtained at room temperature, and the stress analysis of each weld 1a of the high temperature pipe 1 is performed based on the magnitude of the displacement δ, Although the welded portion 1a of the high-temperature pipe 1 to be inspected is selected preferentially, for example, the magnitude of the displacement δ of the high-temperature pipe 1 is measured at room temperature and operating temperature, and the displacement δ r at room temperature is measured. By performing stress analysis on each weld 1a of the high-temperature pipe 1 by using the displacement δ h at the operating temperature and selecting the location of the high-temperature pipe 1 to be preferentially inspected,
Since it is possible to further consider the influence of the elastic deformation δ e described above, it is possible to further improve the reliability in selecting the welded portion 1 a with large damage.
【００３６】また、このような高温配管１の溶接部１ａ
の優先検査箇所の選定を含めて、複数のプラントの高温
配管１の溶接部１ａの検査を行うにあたっては、例え
ば、個々のプラントに設置した各種計測装置からの各種
データを各種通信回線を利用して保守管理センタに定期
的に送信して当該保守管理センタで集中的に管理するよ
うにすれば、個々のプラントの高温配管１の溶接部１ａ
の状態を一括して把握することができ、各プラントごと
の実情に合わせた適切な保守点検サービスを効率よく提
供することができる。Further, the welded portion 1a of the high temperature pipe 1 as described above.
In order to inspect the welded portion 1a of the high temperature pipes 1 of a plurality of plants, including the selection of the priority inspection points, various data from various measuring devices installed in each plant are used by using various communication lines. If it is transmitted to the maintenance management center on a regular basis and is centrally managed by the maintenance management center, the welded portion 1a of the high temperature pipe 1 of each plant is
It is possible to collectively grasp the state of, and it is possible to efficiently provide an appropriate maintenance and inspection service that matches the actual situation of each plant.
【００３７】また、本実施の形態では、火力発電プラン
トや原子力発電プラントなどのボイラとタービンとを接
続する高温配管１の溶接部１ａの検査に適用する場合に
ついて説明したが、これに限らず、複数箇所を拘束支持
された配管の複数の検査箇所から優先的に検査する箇所
を選定する場合であれば、本実施の形態の場合と同様に
適用することができる。Further, in the present embodiment, the case where the invention is applied to the inspection of the welded portion 1a of the high temperature pipe 1 for connecting the boiler and the turbine of the thermal power plant or the nuclear power plant has been described, but the present invention is not limited to this. If a place to be preferentially inspected is selected from a plurality of inspection places of a pipe in which a plurality of places are restrained and supported, the same application as in the case of the present embodiment is possible.
【００３８】[0038]
【発明の効果】第一番目の発明による配管の優先検査箇
所選定方法は、複数箇所を拘束支持された配管の複数の
検査箇所から優先的に検査する箇所を選定する方法にお
いて、前記配管の拘束支持箇所の当初の位置からの変位
量をそれぞれ測定し、当該変位量に基づいて、当該配管
の検査箇所の応力解析を行って、当該配管の優先的に検
査する箇所を選定するので、損傷の大きい検査箇所を高
い信頼性で選定することができ、検査作業の効率化を図
ることができる。According to a first aspect of the present invention, there is provided a method for preferentially inspecting a pipe, wherein a plurality of places are restrained and supported. Displacement from the initial position of the support location is measured respectively, stress analysis of the inspection location of the pipe is performed based on the displacement, and the location of the pipe to be inspected preferentially is selected. Large inspection points can be selected with high reliability, and the efficiency of inspection work can be improved.
【００３９】第二番目の発明による配管の優先検査箇所
選定方法は、第一番目の発明において、前記応力解析
が、前記配管の温度、内部圧力および使用時間に基づい
て求められる当該配管の材料特性を考慮して行われてい
るので、損傷の大きい検査箇所の選定にかかる信頼性を
さらに向上させることができる。The pipe preferential inspection location selecting method according to the second aspect of the present invention is the first aspect of the present invention, in which the stress analysis is performed on the basis of the temperature, the internal pressure and the operating time of the pipe. Therefore, it is possible to further improve the reliability of the selection of the inspection point having a large damage.
【００４０】第三番目の発明による配管の優先検査箇所
選定方法は、第二番目の発明において、前記配管の材料
特性が、当該配管の温度および内部圧力から求められる
応力から当該配管の材料のクリープ速度を求めて、当該
クリープ速度と当該配管の使用時間とからクリープ歪み
を算出して、予め求められている上記材料の応力と歪み
との特性関係に当該クリープ歪みを考慮したものである
ので、損傷の大きい検査箇所の選定にかかる信頼性の向
上を確実に行うことができる。The pipe preferential inspection location selecting method according to the third aspect of the present invention is the pipe pipe according to the second aspect, wherein the material characteristic of the pipe is the creep of the material of the pipe from the stress obtained from the temperature and the internal pressure of the pipe. Obtaining the speed, calculating the creep strain from the creep rate and the use time of the pipe, since the creep strain is considered in the characteristic relationship between the stress and the strain of the material that is obtained in advance, It is possible to surely improve the reliability in selecting the inspection point with large damage.
【００４１】第四番目の発明による配管の優先検査箇所
選定方法は、第二番目または第三番目の発明において、
前記配管の材料特性に基づいて、当該配管の前記拘束支
持箇所の前記変位量から当該拘束支持箇所にかかる荷重
を求め、当該荷重から当該配管の検査箇所に作用する応
力解析を行うので、損傷の大きい検査箇所を高い信頼性
で選定することができる。According to a fourth aspect of the present invention, there is provided a method for selecting a priority inspection point for a pipe according to the second or third aspect,
Based on the material characteristics of the pipe, the load applied to the restraint support position is calculated from the displacement amount of the restraint support place of the pipe, and the stress analysis that acts on the inspection place of the pipe from the load is performed. Large inspection points can be selected with high reliability.
【００４２】第五番目の発明による配管の優先検査箇所
選定方法は、第一番目から第四番目の発明のいずれかに
おいて、前記応力解析の結果に対して、前記配管の検査
箇所の材料中の不純物量と当該検査箇所の損傷速度との
関係を考慮するので、損傷の大きい検査箇所の選定にか
かる信頼性をさらに向上させることができる。According to a fifth aspect of the present invention, there is provided a method for selecting a priority inspection point of a pipe according to any one of the first to fourth aspects of the invention, in which the stress analysis result is compared with the material of the inspection point of the pipe. Since the relationship between the amount of impurities and the damage rate of the inspection location is taken into consideration, it is possible to further improve the reliability in selecting the inspection location with the large damage.
【００４３】第六番目の発明による配管の優先検査箇所
選定方法は、第一番目から第五番目の発明のいずれかに
おいて、前記配管の前記変位量を室温と使用温度とでそ
れぞれ測定し、室温での当該変位量および使用温度での
当該変位量を各々用いて当該配管の検査箇所の応力解析
をそれぞれ行って、当該配管の優先的に検査する箇所を
選定するので、損傷の大きい検査箇所の選定にかかる信
頼性をさらに向上させることができる。According to a sixth aspect of the present invention, there is provided a preferential inspection point selecting method for a pipe, wherein in any one of the first to fifth aspects, the displacement amount of the pipe is measured at a room temperature and a working temperature. The stress analysis of the inspection location of the pipe is carried out by using the displacement quantity at the above and the displacement quantity at the operating temperature, and the inspection area of the pipe is selected preferentially. The reliability of selection can be further improved.
【００４４】また、第七番目の発明による配管の優先検
査箇所選定システムは、複数箇所を拘束支持された配管
の複数の検査箇所から優先的に検査する箇所を選定する
システムであって、前記配管の拘束支持箇所の当初の位
置からの変位量をそれぞれ測定する変位量測定手段と、
前記変位量測定手段で求められた前記変位量に基づい
て、当該配管の検査箇所の応力解析を行って、当該配管
の優先的に検査する箇所を選定する優先検査箇所選定手
段とを備えたので、損傷の大きい検査箇所を高い信頼性
で選定することができ、検査作業の効率化を図ることが
できる。The priority inspection point selection system for piping according to the seventh aspect of the present invention is a system for selecting a point to be inspected preferentially from a plurality of inspection points of a pipe in which a plurality of points are restrained and supported. Displacement amount measuring means for respectively measuring the displacement amount from the initial position of the restraint supporting point of
Based on the displacement amount obtained by the displacement amount measuring means, the stress analysis of the inspection location of the pipe is performed, and the priority inspection location selecting means for selecting the priority inspection location of the piping is provided. In addition, it is possible to select a highly damaged inspection site with high reliability, and it is possible to improve the efficiency of inspection work.
【００４５】第八番目の発明による配管の優先検査箇所
選定システムは、第七番目の発明において、前記優先検
査箇所選定手段が、前記配管の温度、内部圧力および使
用時間に基づいて求められる当該配管の材料特性を考慮
して行うので、損傷の大きい検査箇所の選定にかかる信
頼性をさらに向上させることができる。The pipe preferential inspection point selection system according to the eighth aspect is the pipe inspection system according to the seventh aspect, wherein the preferential inspection point selecting means is obtained based on the temperature, internal pressure and use time of the pipe. In consideration of the material characteristics of (1), it is possible to further improve the reliability in selecting an inspection point having a large damage.
【００４６】第九番目の発明による配管の優先検査箇所
選定システムは、第八番目の発明において、前記配管の
材料特性が、当該配管の温度および内部圧力から求めら
れる応力から当該配管の材料のクリープ速度を求めて、
当該クリープ速度と当該配管の使用時間とからクリープ
歪みを算出して、予め求められている上記材料の応力と
歪みとの特性関係に当該クリープ歪みを考慮したもので
あるので、損傷の大きい検査箇所の選定にかかる信頼性
の向上を確実に行うことができる。The pipe preferential inspection location selection system according to the ninth invention is the pipe inspection system according to the eighth invention, wherein the material characteristic of the pipe is the creep of the material of the pipe from the stress obtained from the temperature and the internal pressure of the pipe. For speed,
The creep strain is calculated from the creep speed and the usage time of the pipe, and the creep strain is taken into consideration in the characteristic relationship between the stress and strain of the material that is obtained in advance. It is possible to surely improve the reliability of selection of.
【００４７】第十番目の発明による配管の優先検査箇所
選定システムは、第八番目または第九番目の発明におい
て、前記優先検査箇所選定手段が、前記配管の材料特性
に基づいて、当該配管の前記拘束支持箇所の前記変位量
から当該拘束支持箇所にかかる荷重を求め、当該荷重か
ら当該配管の検査箇所に作用する応力解析を行うので、
損傷の大きい検査箇所を高い信頼性で選定することがで
きる。In the pipe inspection priority selection system according to the tenth aspect of the invention, in the eighth or ninth aspect of the invention, the priority inspection place selection means is characterized in that, based on material characteristics of the pipe, Since the load applied to the constraint support location is calculated from the displacement amount of the constraint support location, and the stress analysis that acts on the inspection location of the pipe is performed from the load,
It is possible to select a highly damaged inspection site with high reliability.
【００４８】第十一番目の発明による配管の優先検査箇
所選定システムは、第七番目から第十番目の発明のいず
れかにおいて、前記優先検査箇所選定手段が、前記応力
解析の結果に対して、前記配管の検査箇所の材料中の不
純物量と当該検査箇所の損傷速度との関係を考慮するの
で、損傷の大きい検査箇所の選定にかかる信頼性をさら
に向上させることができる。In the pipe priority inspection location selection system according to the tenth invention, in any one of the seventh to tenth inventions, the priority inspection location selection means sets the stress analysis result to Since the relationship between the amount of impurities in the material at the inspection point of the pipe and the damage rate of the inspection point is taken into consideration, it is possible to further improve the reliability in selecting the inspection point having a large damage.
【００４９】第十二番目の発明による配管の優先検査箇
所選定システムは、第七番目から第十一番目の発明のい
ずれかにおいて、前記変位量測定手段が、前記配管の前
記変位量を室温と使用温度とでそれぞれ測定し、前記優
先検査箇所選定手段が、室温での前記変位量および使用
温度での前記変位量を各々用いて前記配管の検査箇所の
応力解析をそれぞれ行って、当該配管の優先的に検査す
る箇所を選定するので、損傷の大きい検査箇所の選定に
かかる信頼性をさらに向上させることができる。In the pipe preferential inspection location selection system according to the twelfth invention, in any one of the seventh to tenth inventions, the displacement amount measuring means sets the displacement amount of the pipe to room temperature. Measured respectively with the operating temperature, the priority inspection point selecting means performs stress analysis of the inspection point of the pipe by using the displacement amount at room temperature and the displacement amount at the operating temperature, respectively, and Since the location to be inspected is selected preferentially, it is possible to further improve the reliability in selecting the inspection location having a large damage.
【図１】本発明による配管の優先検査箇所選定方法及び
そのシステムを適用する、火力発電プラントや原子力発
電プラントなどのボイラとタービンとを接続する高温配
管の実施の形態の配置状態の説明図である。FIG. 1 is an explanatory view of an arrangement state of an embodiment of a high-temperature pipe for connecting a boiler and a turbine of a thermal power plant, a nuclear power plant or the like, to which the method and system for preferential inspection of piping according to the present invention are applied. is there.
【図２】本発明による配管の優先検査箇所選定方法及び
そのシステムの実施の形態の手順説明図である。FIG. 2 is a procedure explanatory diagram of an embodiment of a method and a system for preferential inspection of piping according to the present invention.
【図３】本発明による配管の優先検査箇所選定方法及び
そのシステムの実施の形態の応力解析法の説明図であ
る。FIG. 3 is an explanatory diagram of a stress analysis method of an embodiment of a priority inspection point selection method for piping and a system therefor according to the present invention.
【図４】本発明による配管の優先検査箇所選定方法及び
そのシステムの実施の形態の経年変化した材料特性の算
出方法の説明図である。FIG. 4 is an explanatory diagram of a method for selecting a priority inspection point for piping according to the present invention and a method for calculating aged material characteristics according to an embodiment of the system.
【図５】本発明による配管の優先検査箇所選定方法及び
そのシステムの実施の形態の損傷データベースの一例で
ある材料中の不純物量と損傷速度との関係を表すグラフ
である。FIG. 5 is a graph showing the relationship between the amount of impurities in the material and the damage rate, which is an example of the damage database of the embodiment of the method and system for preferential inspection of piping according to the present invention.
１ 高温配管 １ａ 溶接部 ２ ハンガ ２ａ ハンガ点（拘束支持位置） 1 high temperature piping 1a welded part 2 hanger 2a Hanger point (restraint support position)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 阿座上 正信 長崎県長崎市飽の浦町１番１号 三菱重 工業株式会社長崎造船所内 (72)発明者 今本 敏彦 東京都千代田区丸の内二丁目５番１号 三菱重工業株式会社内 (56)参考文献 特開 平８−145739（ＪＰ，Ａ) 実開 昭63−167299（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01L 1/00 G01M 19/00 F16L 1/00 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masanobu Azagami 1-1 No. 1 Atsunoura-machi, Nagasaki City, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (72) Inventor Toshihiko Imamoto 2-5-1 Marunouchi, Chiyoda-ku, Tokyo No. Mitsubishi Heavy Industries, Ltd. (56) Reference JP-A-8-145739 (JP, A) Actual development Sho 63-167299 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) G01L 1/00 G01M 19/00 F16L 1/00
Claims (12)
検査箇所から優先的に検査する箇所を選定する方法にお
いて、 前記配管の拘束支持箇所の当初の位置からの変位量をそ
れぞれ測定し、当該変位量に基づいて、当該配管の検査
箇所の応力解析を行って、当該配管の優先的に検査する
箇所を選定することを特徴とする配管の優先検査箇所選
定方法。1. A method of selecting a place to be preferentially inspected from a plurality of inspection places of a pipe in which a plurality of places are constrained and supported, wherein the displacement amount from the original position of the constrained support place of the pipe is measured, A method for selecting a priority inspection point of a pipe, which comprises performing stress analysis of an inspection point of the pipe based on the displacement amount and selecting a point of the pipe to be inspected preferentially.
時間に基づいて求められる当該配管の材料特性を考慮し
て行われていることを特徴とする配管の優先検査箇所選
定方法。2. The pipe according to claim 1, wherein the stress analysis is performed in consideration of material characteristics of the pipe, which are obtained based on a temperature, an internal pressure and a usage time of the pipe. Priority inspection point selection method.
から求められる応力から当該配管の材料のクリープ速度
を求めて、当該クリープ速度と当該配管の使用時間とか
らクリープ歪みを算出して、予め求められている上記材
料の応力と歪みとの特性関係に当該クリープ歪みを考慮
したものであることを特徴とする配管の優先検査箇所選
定方法。3. The creep characteristic of the material of the pipe is determined from the stress obtained from the temperature and the internal pressure of the pipe, and the creep rate and the usage time of the pipe are determined according to claim 2. A method for selecting a preferential inspection location for a pipe, characterized in that the creep strain is calculated from the above, and the creep strain is taken into consideration in a characteristic relationship between the stress and the strain of the material that is obtained in advance.
持箇所の前記変位量から当該拘束支持箇所にかかる荷重
を求め、当該荷重から当該配管の検査箇所に作用する応
力解析を行うことを特徴とする配管の優先検査箇所選定
方法。4. The load according to claim 2, wherein the load applied to the restraint support position is obtained from the displacement amount of the restraint support place of the pipe based on the material characteristics of the pipe, and the pipe is inspected from the load. A method for selecting priority inspection points for piping, which is characterized by performing stress analysis on points.
料中の不純物量と当該検査箇所の損傷速度との関係を考
慮して当該配管の優先的に検査する箇所を選定すること
を特徴とする配管の優先検査箇所選定方法。5. The method according to any one of claims 1 to 4, wherein, with respect to the result of the stress analysis, the relationship between the amount of impurities in the material at the inspection point of the pipe and the damage rate at the inspection point is considered. A method for selecting a priority inspection point for piping, which is characterized by selecting a priority inspection point for piping.
定し、室温での当該変位量および使用温度での当該変位
量を各々用いて当該配管の検査箇所の応力解析をそれぞ
れ行って、当該配管の優先的に検査する箇所を選定する
ことを特徴とする配管の優先検査箇所選定方法。6. The displacement amount of the pipe according to claim 1, wherein the displacement amount of the pipe is measured at room temperature and operating temperature, and the displacement amount at room temperature and the displacement amount at operating temperature are used respectively. A method for selecting a priority inspection point for a pipe, wherein stress analysis is performed on each inspection point of the pipe to select a priority inspection point for the pipe.
検査箇所から優先的に検査する箇所を選定するシステム
であって、 前記配管の拘束支持箇所の当初の位置からの変位量をそ
れぞれ測定する変位量測定手段と、 前記変位量測定手段で求められた前記変位量に基づい
て、当該配管の検査箇所の応力解析を行って、当該配管
の優先的に検査する箇所を選定する優先検査箇所選定手
段とを備えたことを特徴とする配管の優先検査箇所選定
システム。7. A system for preferentially selecting a place to be inspected from a plurality of inspection points of a pipe constrained and supported at a plurality of points, wherein the displacement amount from the initial position of the constrained support portion of the pipe is measured. Displacement amount measuring means to do, based on the displacement amount obtained by the displacement amount measuring means, the stress analysis of the inspection location of the pipe is performed, and the priority inspection location to select the location of the pipe to be inspected preferentially A priority inspection point selection system for pipes, which is provided with a selection means.
力および使用時間に基づいて求められる当該配管の材料
特性を考慮して行うことを特徴とする配管の優先検査箇
所選定システム。8. The pipe according to claim 7, wherein the preferential inspection location selecting means performs the pipe inspection in consideration of material characteristics of the pipe, which are obtained based on a temperature, an internal pressure and a usage time of the pipe. Priority inspection point selection system.
から求められる応力から当該配管の材料のクリープ速度
を求めて、当該クリープ速度と当該配管の使用時間とか
らクリープ歪みを算出して、予め求められている上記材
料の応力と歪みとの特性関係に当該クリープ歪みを考慮
したものであることを特徴とする配管の優先検査箇所選
定システム。9. The material characteristic of the pipe according to claim 8, wherein the creep rate of the material of the pipe is obtained from the stress obtained from the temperature and the internal pressure of the pipe, and the creep rate and the usage time of the pipe are calculated. A priority inspection point selection system for a pipe, wherein creep strain is calculated from the above, and the creep strain is taken into consideration in a characteristic relationship between the stress and the strain of the above-mentioned material which is obtained in advance.
づいて、当該配管の前記拘束支持箇所の前記変位量から
当該拘束支持箇所にかかる荷重を求め、当該荷重から当
該配管の検査箇所に作用する応力解析を行うことを特徴
とする配管の優先検査箇所選定システム。10. The load according to claim 8 or 9, wherein the preferential inspection location selecting unit obtains a load applied to the restraint support location from the displacement amount of the restraint support location of the pipe based on a material characteristic of the pipe. A priority inspection point selection system for pipes, which performs stress analysis acting on an inspection point of the pipe from the load.
て、 前記優先検査箇所選定手段が、前記応力解析の結果に対
して、前記配管の検査箇所の材料中の不純物量と当該検
査箇所の損傷速度との関係を考慮して当該配管の優先的
に検査する箇所を選定することを特徴とする配管の優先
検査箇所選定システム。11. The priority inspection location selecting means according to claim 7, wherein the priority inspection location selecting unit determines the amount of impurities in the material of the inspection location of the pipe and the damage rate of the inspection location with respect to the result of the stress analysis. A priority inspection point selection system for pipes, which selects the inspection point of the pipe in consideration of the relationship with.
て、 前記変位量測定手段が、前記配管の前記変位量を室温と
使用温度とでそれぞれ測定し、 前記優先検査箇所選定手段が、室温での前記変位量およ
び使用温度での前記変位量を各々用いて前記配管の検査
箇所の応力解析をそれぞれ行って、当該配管の優先的に
検査する箇所を選定することを特徴とする配管の優先検
査箇所選定システム。12. The displacement amount measuring device according to claim 7, wherein the displacement amount measuring device measures the displacement amount of the pipe at a room temperature and a working temperature, respectively, and the priority inspection point selecting device measures the displacement amount at room temperature. Priority inspection location of the pipe characterized by performing stress analysis of the inspection location of the pipe by using the displacement amount and the displacement amount at the operating temperature, respectively, and selecting a location to be inspected preferentially of the pipe. Selection system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000250543A JP3389209B2 (en) | 2000-08-22 | 2000-08-22 | Method and system for selecting priority inspection locations for piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000250543A JP3389209B2 (en) | 2000-08-22 | 2000-08-22 | Method and system for selecting priority inspection locations for piping |
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| Publication Number | Publication Date |
|---|---|
| JP2002062199A JP2002062199A (en) | 2002-02-28 |
| JP3389209B2 true JP3389209B2 (en) | 2003-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000250543A Expired - Fee Related JP3389209B2 (en) | 2000-08-22 | 2000-08-22 | Method and system for selecting priority inspection locations for piping |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012107896A (en) * | 2010-11-15 | 2012-06-07 | Chubu Electric Power Co Inc | Method for measuring stress of high-temperature pipe |
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|---|---|---|---|---|
| JP4808110B2 (en) * | 2006-09-06 | 2011-11-02 | 中国電力株式会社 | Damage assessment method |
| JP5378113B2 (en) * | 2009-08-28 | 2013-12-25 | 東京瓦斯株式会社 | Stress evaluation method and stress evaluation apparatus for piping structure |
| KR101145964B1 (en) | 2012-01-18 | 2012-05-15 | 주식회사백상 | Evaluation Method of Piping Thermal Expansion |
| KR101831397B1 (en) * | 2016-11-09 | 2018-02-22 | 한국전력기술 주식회사 | System, Method for Configuration Management and Computer Readable Record Medium Thereof |
| JP6440892B1 (en) * | 2018-09-04 | 2018-12-19 | 義昭 新納 | Internal state estimation system |
| CN116107281B (en) * | 2023-04-13 | 2023-07-18 | 山东美生热能科技有限公司 | Thermal-insulated oil casing performance test tube accuse system based on data analysis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012107896A (en) * | 2010-11-15 | 2012-06-07 | Chubu Electric Power Co Inc | Method for measuring stress of high-temperature pipe |
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| JP2002062199A (en) | 2002-02-28 |
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