JPS59228151A - Detection of separation of lining of pipe - Google Patents

Detection of separation of lining of pipe

Info

Publication number
JPS59228151A
JPS59228151A JP58103860A JP10386083A JPS59228151A JP S59228151 A JPS59228151 A JP S59228151A JP 58103860 A JP58103860 A JP 58103860A JP 10386083 A JP10386083 A JP 10386083A JP S59228151 A JPS59228151 A JP S59228151A
Authority
JP
Japan
Prior art keywords
pipe
lining
time
metal piece
film
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
Application number
JP58103860A
Other languages
Japanese (ja)
Inventor
Tatsuo Hasegawa
長谷川　達男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IHI Corp filed Critical IHI Corp
Priority to JP58103860A priority Critical patent/JPS59228151A/en
Publication of JPS59228151A publication Critical patent/JPS59228151A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

PURPOSE:To make it possible to accurately detect whether or not a lining of a pipe has separated, from the outside of the pipe, by carrying out a radiographic examination. CONSTITUTION:A metal piece 5 is previously buried between polyethylene lining members 3 and 4 of a pipe 2. Radiant rays are applied to the metal piece 5 from a radiation source 6 provided outside the pipe 2 to carry out a radiographic examination. A comparison is made between the image formed on a film 7 by photographing at the time of burying the metal piece 5 and the image on the film 7 formed by photographing at the time of the lining separation inspection. As the result of the comparison, even when the shadow of the metal piece 5 is on the image frame of the film 7 at the time of the inspection, if the shadow has changed, it is possible to estimate the fact that the lining members 3, 4 have separated from the inner surface of the pipe 2. On the other hand, when no shadow of the metal piece 5 is on the image frame of the film 7 at the time of the inspection, it is clear that the lining members 3, 4 have already flown out with the stream of the sea water 1.

Description

【発明の詳細な説明】 本発明は、内面を非金属材料でライニングしたライニン
グ管にライニング剥離が発生しているか否かを検出Ｊる
方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting whether or not lining peeling has occurred in a lined pipe whose inner surface is lined with a non-metallic material.

原子力発電設備における冷却系配管のように海水を輸送
する管には、腐食防止のため管内面を耐食性のライニン
グ材で覆ったライニング管が使用される。Lined pipes, in which the inner surface of the pipe is covered with a corrosion-resistant lining material, are used for pipes that transport seawater, such as cooling system pipes in nuclear power generation facilities, to prevent corrosion.

この種のライニング管においてライニング材は、管に密
着さ・れ簡単には剥ａｔ　Ｌ、ないようになっているが
、使用中に何等かの原因で剥離し、海水により押し流さ
れて管をＩＩＩ塞するＪ：うになることも考えられるた
め、ライニング剥離の有無を検出できるようにりる必要
がある。しかし従来は、管の外側からこのライニング剥
離を正確に検出することはできなかったので、検査のた
びに管を取外して内側から検査するようにしており、こ
のため非常に不便であるという問題があった゛。In this type of lined pipe, the lining material is tightly adhered to the pipe and does not easily peel off, but during use it may peel off for some reason and be washed away by seawater, causing the pipe to become damaged. Closed J: Since it is possible that the lining will peel off, it is necessary to be able to detect whether or not the lining has peeled off. However, in the past, it was not possible to accurately detect this lining peeling from the outside of the pipe, so the pipe was removed each time it was inspected and inspected from the inside, which caused the problem of being very inconvenient. It was.

本発明は管の外側からライニング剥離を正Ｍ［に検出で
きるようにしたものである。The present invention makes it possible to detect lining peeling from the outside of the tube at a positive angle M[.

以下、本発明の一実施例を図面により説明する。An embodiment of the present invention will be described below with reference to the drawings.

図は本発明の一実施例の要路を示づ゛もので、海水１を
輸送する管２の内面にライニングを施工する際、例えば
ポリエチレン製のライニング材３．４の間に、金属片５
を埋設しておいて、管２の外側に設けた散開線源６から
該金属片５−に放射線をあてて放射線透過試験を実施し
、金属片埋設時の撮影によってフィルム７上に写った画
面と、ライニング剥離検査時に前記埋設時の卵形位置と
同位置で撮影した場合にフィルム７上に写った画面とを
比較する。The figure shows the essential steps of an embodiment of the present invention. When lining the inner surface of a pipe 2 for transporting seawater 1, metal pieces 5 are placed between lining materials 3 and 4 made of polyethylene, for example.
was buried, and a radiation transmission test was performed by exposing the metal piece 5- to radiation from a diffuse radiation source 6 installed outside the tube 2. and a screen imaged on the film 7 when photographed at the same position as the egg-shaped position at the time of embedding during the lining peeling inspection.

比較した結果、検査時の画面に金属片５の陰影が写って
いる場合であってもその陰影に変化が生じていれば、剥
離によってライニング材３゜４が管２内面から浮き上が
っていることを推測でき、又検査時の画面に金属片５の
陰影が全く写っていなかった場合は、ライニング材３．
４が海水１の流れに乗つＣ既に流出していることが明ら
かとなる。As a result of the comparison, even if the shadow of the metal piece 5 is visible on the screen at the time of inspection, if the shadow changes, this indicates that the lining material 3゜4 has been lifted from the inner surface of the tube 2 due to peeling. If it can be guessed and no shadow of the metal piece 5 is visible on the screen at the time of inspection, the lining material 3.
It becomes clear that C 4 has already flowed out on the flow of seawater 1.

なお本発明は前記実施例に示したもののみに限定される
ことなく、例えば、ポリエチレン以外の耐食性金属材料
によってライニング材を製作してもよいこと、金属片の
替りに微粒鉄粉を埋設してもよいこと、金属片を管の円
周方向に埋設しても軸芯方向に埋設してもよいこと、流
体が海水でなくともよいこと、その他本発明の要旨を逸
脱しない範囲において種々の変更を加え得ること、等は
勿論である。Note that the present invention is not limited to only those shown in the above embodiments, and for example, the lining material may be made of a corrosion-resistant metal material other than polyethylene, and fine iron powder may be embedded in place of metal pieces. The metal pieces may be buried in the circumferential direction or the axial direction of the pipe, the fluid does not need to be seawater, and various other changes may be made without departing from the gist of the present invention. Of course, it is possible to add .

以上述べたように本発明によれば、管の外側からライニ
ング剥離を正確に検出でき、検査の度に管を取外す必要
はないから非常に便利である、という優れた効果を奏し
得る。As described above, according to the present invention, lining separation can be accurately detected from the outside of the pipe, and there is no need to remove the pipe each time an inspection is performed, which is very convenient.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明の実施例を示す略図ひある。 １・・・海水、２・・・管、３．４・・・ライニング材
、５・・・金属片、６・・・放射線源、７・・・フィル
ム。 特　　許　　出　　願　　人 石川島播磨重工業株式会社The figure is a schematic representation of an embodiment of the invention. DESCRIPTION OF SYMBOLS 1...Seawater, 2...Pipe, 3.4...Lining material, 5...Metal piece, 6...Radiation source, 7...Film. Patent application Hitoshi Kawajima Harima Heavy Industries Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] １）　管内面に設りた非金属製ライニング材の適宜個所
にあらかじめ金属を埋設しておいて放射線透過試験を実
施し、埋設時に撮影した画面と、検査時に前記埋設時の
撮影位置と同位置で撮影した画面とを比較することによ
りライニング剥離を検出することを特徴とする管のライ
ニング剥２を検出方法。1) A radiographic test was carried out after embedding metal in appropriate places in the non-metallic lining material installed on the inner surface of the pipe, and the screen photographed at the time of burying and the same position as the photographed position at the time of burying at the time of inspection. 2. A method for detecting lining peeling of a pipe, the method comprising: detecting lining peeling by comparing the screen shot with
JP58103860A 1983-06-10 1983-06-10 Detection of separation of lining of pipe Pending JPS59228151A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58103860A JPS59228151A (en) 1983-06-10 1983-06-10 Detection of separation of lining of pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58103860A JPS59228151A (en) 1983-06-10 1983-06-10 Detection of separation of lining of pipe

Publications (1)

Publication Number Publication Date
JPS59228151A true JPS59228151A (en) 1984-12-21

Family

ID=14365198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58103860A Pending JPS59228151A (en) 1983-06-10 1983-06-10 Detection of separation of lining of pipe

Country Status (1)

Country Link
JP (1) JPS59228151A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974245A (en) * 1986-10-24 1990-11-27 Dowell Schlumberger Incorporated System for the assembly of a metal joining piece and a high pressure composite material tube notably applications for equipment used in the oil industry

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974245A (en) * 1986-10-24 1990-11-27 Dowell Schlumberger Incorporated System for the assembly of a metal joining piece and a high pressure composite material tube notably applications for equipment used in the oil industry

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