JPH0440638B2 - - Google Patents
Info
- Publication number
- JPH0440638B2 JPH0440638B2 JP15021286A JP15021286A JPH0440638B2 JP H0440638 B2 JPH0440638 B2 JP H0440638B2 JP 15021286 A JP15021286 A JP 15021286A JP 15021286 A JP15021286 A JP 15021286A JP H0440638 B2 JPH0440638 B2 JP H0440638B2
- Authority
- JP
- Japan
- Prior art keywords
- fluororesin
- tube
- damaged
- heat
- heat exchanger
- 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
Links
- 238000000034 method Methods 0.000 claims description 16
- 238000002844 melting Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 5
- 229920002313 fluoropolymer Polymers 0.000 description 5
- 239000004811 fluoropolymer Substances 0.000 description 5
- -1 polytetrafluoroethylene Polymers 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 2
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Description
【発明の詳細な説明】
発明の技術分野
本発明は、多管式フツ素樹脂製熱交換器の補修
方法に関し、さらに詳しくは多管式フツ素樹脂製
熱交換器を構成するフツ素樹脂製熱交換器用チユ
ーブが一部破損した場合の補修方法に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a method for repairing a multi-tubular fluororesin heat exchanger, and more specifically to a method for repairing a multi-tubular fluororesin heat exchanger. This invention relates to a repair method when a heat exchanger tube is partially damaged.
発明の技術的背景ならびにその問題点
従来熱交換器としては、ステンレス鋼、、ニツ
ケル、鋼などの金属製多管式熱交換器が広く用い
られてきた。このような金属製熱交換器は大きな
熱伝導率ならびに総括伝熱係数を有しているが、
酸液などに対する耐腐食性が充分ではなく、また
表面にスケールが付着しやすいという問題点があ
つた。Technical background of the invention and its problems Conventionally, multi-tubular heat exchangers made of metals such as stainless steel, nickel, and steel have been widely used as heat exchangers. Although such metal heat exchangers have high thermal conductivity and overall heat transfer coefficient,
There were problems in that it did not have sufficient corrosion resistance against acid solutions and the like, and scale easily adhered to the surface.
このためフツ素樹脂製の多管式熱交換器が開発
されている。このフツ素樹脂製熱交換器は40〜
2500本もの多数のフツ素樹脂製チユーブを束ねて
両端を熱融着によりハニカム状に一体化した構造
を有しており、優れた耐熱性、耐薬品性を有する
とともに、表面が滑らかであるためスケールが付
着しにくいという利点をも有している。 For this reason, multi-tubular heat exchangers made of fluororesin have been developed. This fluoropolymer heat exchanger is 40~
It has a structure in which 2,500 fluororesin tubes are bundled together and integrated into a honeycomb shape by heat-sealing both ends, and it has excellent heat resistance and chemical resistance, as well as a smooth surface. It also has the advantage of being less likely to attract scale.
ところがフツ素樹脂は、各種金属と比較して熱
伝導率が小さいため、熱交換器としての性能を上
げるため、実用上支障のない範囲でフツ素樹脂製
チユーブの肉厚をできる限り薄くしている。この
ようにフツ素樹脂製チユーブは肉薄であり、しか
もフツ素樹脂製チユーブ内には、熱交換時に過熱
水蒸気が供給されることが多いため、過熱水蒸気
によつてフツ素樹脂製チユーブが振動し、互いに
隣接するチユーブ同士がこすれ合うことがあり、
このためフツ素樹脂製チユーブの壁面が摩耗した
り、あるいはこすれ合つた部分に静電気が発生す
るなどして、フツ素樹脂製チユーブにピンホール
が発生することがあつた。 However, fluororesin has a lower thermal conductivity than various metals, so in order to improve its performance as a heat exchanger, the wall thickness of the fluororesin tube must be made as thin as possible without causing any practical problems. There is. In this way, the fluororesin tube is thin, and superheated steam is often supplied into the fluororesin tube during heat exchange, so the fluororesin tube vibrates due to the superheated steam. , adjacent tubes may rub against each other,
As a result, the wall surface of the fluororesin tube is worn out, or static electricity is generated in the areas where they rub against each other, resulting in pinholes in the fluororesin tube.
もしフツ素樹脂製チユーブにピンホールが発生
すると、熱交換器としての機能が損なわれるだけ
でなく、装置に腐食流体が逆流するなどして大き
な事故の原因となることがあつた。 If a pinhole were to develop in a fluororesin tube, it would not only impair its function as a heat exchanger, but also cause corrosive fluid to flow back into the device, causing a major accident.
このため、もしフツ素樹脂製熱交換器を構成す
るフツ素樹脂製チユーブにピンホールなどの破損
が生じた場合には、この破損を補修する必要があ
つた。 Therefore, if damage such as a pinhole occurs in the fluororesin tube constituting the fluororesin heat exchanger, it is necessary to repair the damage.
従来、破損が生じたフツ素樹脂製チユーブの補
修は、以下のようにして行なわれてきた。すなわ
ち、もしフツ素樹脂製チユーブに破損が生じたよ
うな場合には、チユーブ集束端部において破損が
生じたチユーブの開口端を閉塞することによりチ
ユーブ全体を閉塞していた。破損が生じたチユー
ブの開口端をチユーブ集束端部で閉塞するには、
一般に、その開口端部内に熱溶融性フツ素樹脂製
の溶接棒を挿入し、熱風ガンから発生する熱風な
どを開口端部に吹付けて加熱することによつて熱
溶融性フツ素樹脂を溶融させ、破損が生じたチユ
ーブの開口端部壁と熱溶融性フツ素樹脂溶接棒と
を互いに融着させて一体化することにより行なわ
れてきた。 Conventionally, damaged fluororesin tubes have been repaired in the following manner. That is, if a fluororesin tube is damaged, the entire tube is closed by closing the open end of the tube where the damage occurred at the converging end of the tube. To close the open end of a damaged tube with the tube focusing end,
Generally, a welding rod made of heat-fusible fluororesin is inserted into the open end, and hot air generated from a hot air gun is blown onto the open end to heat it, thereby melting the heat-fusible fluororesin. This has been done by fusing the open end wall of the tube in which the damage has occurred and a thermofusible fluororesin welding rod to each other to integrate them.
ところが上記のようにして破損が生じたフツ素
樹脂製チユーブの開口端部を閉塞しようとする
と、破損が生じたフツ素樹脂製チユーブの開口端
部は閉塞しうるが、この閉塞時にチユーブ集束端
部がかなりの高温にさらされるため、破損が生じ
たフツ素樹脂製チユーブに隣接するフツ素樹脂製
チユーブもかなりの高温にさらされて熱変形が生
じ、破損が生じたフツ素樹脂製チユーブと隣接す
るチユーブとの間に剥離が生じてしまうという重
大な問題点が生じていた。このような問題点は、
チユーブがポリテトラフルオロエチレン製である
場合に特に重大であつた。一方、フツ素樹脂製チ
ユーブがテトラフルオロエチレンとパーフルオロ
アルキルビニルエーテルとの共重合体（以下
PFAと略記することがある）などの熱溶融性フ
ツ素樹脂の場合には、上記のような問題点に加え
て、加熱の変形によつて互いに隣接するフツ素樹
脂製チユーブ同士が融着してしまうという問題点
も生じていた。 However, when attempting to close the open end of the damaged fluororesin tube as described above, the open end of the damaged fluororesin tube may be closed. As the fluoropolymer tube adjacent to the damaged fluoropolymer tube is exposed to considerable high temperatures, the fluoropolymer tube adjacent to the damaged fluoropolymer tube is also exposed to considerable high temperature and undergoes thermal deformation. A serious problem has arisen in that separation occurs between adjacent tubes. Such problems are
This was particularly important when the tube was made of polytetrafluoroethylene. On the other hand, the fluororesin tube is a copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether (hereinafter referred to as
In the case of heat-melting fluororesins such as PFA (sometimes abbreviated as PFA), in addition to the problems mentioned above, adjacent fluororesin tubes may fuse together due to deformation during heating. There was also the problem that the
もし隣接するフツ素樹脂製チユーブ間に剥離が
生ずると、熱交換流体が、剥離によつて生じたチ
ユーブ間の間〓部をつたわつて外部に漏洩してし
まうという熱交換器としては致命的な欠陥となつ
てしまう。 If separation occurs between adjacent fluororesin tubes, the heat exchange fluid will leak to the outside through the gap between the tubes, which is fatal for a heat exchanger. It becomes a defect.
また、全く別の補修方法としては、ピンホール
などの破損が生じたフツ素樹脂製チユーブを、そ
の破損部の両端を切断し、それぞれの切断端部を
加熱しながら圧着することにより融着して閉塞す
る方法も採用されてきた。ところがこの方法で
は、第３図に示すように、切断面の両端に非融着
部Ａが生じやすく、流体漏れが発生しやすく、信
頼性に劣るという大きな問題点があつた。 In addition, a completely different repair method is to cut off both ends of a fluororesin tube that has been damaged, such as a pinhole, and fuse the cut ends together by crimping them while heating. A method of occlusion has also been adopted. However, as shown in FIG. 3, this method has a major problem in that unfused portions A are likely to occur at both ends of the cut surface, fluid leakage is likely to occur, and reliability is poor.
発明の目的
本発明は、上記のような従来技術に伴なう問題
点を一挙に解決しようとするものであつて、もし
熱交換器を形成するフツ素樹脂製チユーブにピン
ホールなどの破損が生じても、この破損を隣接す
るチユーブに悪影響を与えることなくしかも簡単
に補修しうるような、多管式フツ素樹脂製熱交換
器の補修方法を提供することを目的としている。Purpose of the Invention The present invention aims to solve all of the problems associated with the prior art as described above. It is an object of the present invention to provide a method for repairing a multi-tube type fluororesin heat exchanger, which allows damage to be easily repaired without adversely affecting adjacent tubes, even if such damage occurs.
発明の概要
本発明に係る多管式フツ素樹脂製熱交換器の補
修方法は、破損が生じたフツ素樹脂製チユーブの
破損部を切断して除去した後、切断開口部にこの
チユーブの外周に沿うような外枠リングを装着
し、次いで切断開口部を加熱により溶融された熱
溶融性フツ素樹脂で閉塞することを特徴としてい
る。Summary of the Invention The method for repairing a multi-tube fluororesin heat exchanger according to the present invention involves cutting and removing the damaged portion of a damaged fluororesin tube, and then inserting the outer periphery of the tube into the cut opening. It is characterized in that an outer frame ring is attached along the edges of the cutter, and then the cutting opening is closed with a thermofusible fluororesin melted by heating.
本発明に係る多管式フツ素樹脂製熱交換器の補
修方法によれば、破損が生じたフツ素樹脂製チユ
ーブの破損部を切断して除去した後、切断開口部
にこのチユーブの外周に沿うような外枠リングを
装着し、次いで切断開口部を、加熱により溶融さ
れた熱溶融性フツ素樹脂で閉塞しているので、破
損が生じたチユーブの開口部閉塞時に、加熱によ
つてチユーブが変形することが防止され、しかも
破損が生じて補修されるべきチユーブの内周面に
熱溶融性フツ素樹脂を強固に一体化することがで
き、信頼性のある補修方法が提供される。 According to the method for repairing a multi-tubular fluororesin heat exchanger according to the present invention, after cutting and removing the damaged part of a damaged fluororesin tube, the outer periphery of the tube is inserted into the cut opening. An outer frame ring is attached to the tube, and the cut opening is then closed with heat-melting fluororesin, which is melted by heating. A reliable repair method is provided in which deformation of the tube is prevented, and the heat-melting fluororesin can be firmly integrated with the inner circumferential surface of a damaged tube to be repaired.
発明の具体的説明
以下本発明に係る多管式フツ素樹脂製熱交換器
の補修方法について、図面を参照しながら説明す
る。DETAILED DESCRIPTION OF THE INVENTION A method for repairing a multi-tubular fluororesin heat exchanger according to the present invention will be described below with reference to the drawings.
本発明では、破損が生じた多管式フツ素樹脂製
熱交換器が補修されるが、この多管式フツ素樹脂
製熱交換器は、40〜2500本にも及ぶ多数のフツ素
樹脂製チユーブからなり、このチユーブの集束端
部は一体化されて一般にハニカム状とされてい
る。 In the present invention, a damaged multi-tube fluororesin heat exchanger is repaired, but this multi-tube fluororesin heat exchanger consists of a large number of fluororesin tubes ranging from 40 to 2,500 pieces. It consists of a tube whose converging ends are integrally formed, generally in the shape of a honeycomb.
このようなチユーブを構成するフツ素樹脂とし
ては、熱溶融性であつてもよく、また熱溶融性で
なくてもよく、熱溶融性でないフツ素樹脂として
はポリテトラフルオロエチレン（PTFE）が用い
られ、また熱溶融性フツ素樹脂であるフツ素樹脂
としては、前述のPFA、テトラフルオロエチレ
ンとヘキサフルオロプロピレンとの共重合体であ
るFEP、テトラフルオロエチレンとヘキサフル
オロプロピレンとパーフルオロアルキルビニルエ
ーテルとの共重合体であるEPE、ポリクロロト
リフルオロエチレンであるPCTFE、エチレンと
テトラフルオロエチレンとの共重合体である
ETFEなどが用いられる。 The fluororesin constituting such a tube may or may not be thermofusible; polytetrafluoroethylene (PTFE) is used as the non-thermofusible fluororesin. In addition, examples of the fluororesin which is a heat-melting fluororesin include the above-mentioned PFA, FEP which is a copolymer of tetrafluoroethylene and hexafluoropropylene, and a copolymer of tetrafluoroethylene, hexafluoropropylene and perfluoroalkyl vinyl ether. EPE is a copolymer of polychlorotrifluoroethylene, PCTFE is a copolymer of ethylene and tetrafluoroethylene.
ETFE etc. are used.
ところで上記のような多管式フツ素樹脂製熱交
換器を構成するフツ素樹脂製チユーブの一本に破
損が生じた場合の補修方法について説明する。ま
ず第１図に示すように、ピンホールなどの破損部
１が生じたフツ素樹脂製チユーブ２の破損部１の
両端を切断して、破損部１を除去する。 By the way, a repair method when one of the fluororesin tubes constituting the multi-tube fluororesin heat exchanger as described above is damaged will be explained. First, as shown in FIG. 1, both ends of the damaged portion 1 of the fluororesin tube 2 in which a damaged portion 1 such as a pinhole has occurred are cut off, and the damaged portion 1 is removed.
次いでこのようにして切断された切断開口部
に、このチユーブの外周に沿うような形状の外枠
リング３を装着する。この外枠リング３は、加熱
時においてもチユーブを構成するフツ素樹脂と融
着せず、しかも耐熱性に富んだ材質により形成さ
れていることが好ましく、具体的には、金属製あ
るいはセラミツクス製のものが用いられることが
好ましい。 Next, an outer frame ring 3 having a shape that follows the outer circumference of the tube is attached to the thus cut opening. This outer frame ring 3 is preferably made of a material that does not fuse with the fluororesin constituting the tube even when heated and is highly heat resistant. Specifically, it is made of a material made of metal or ceramics. It is preferable that a
このようにして破損が生じたフツ素樹脂製チユ
ーブ２の破損部１を除去した後、このチユーブ２
の切断開口部に外枠リング３を挿入した状態で、
切断開口部を、加熱により溶融された熱溶融性フ
ツ素樹脂で閉塞する。 After removing the damaged part 1 of the fluororesin tube 2 which has been damaged in this way, the tube 2 is
With the outer frame ring 3 inserted into the cutting opening,
The cut opening is closed with a thermofusible fluororesin melted by heating.
破損が生じたフツ素樹脂製チユーブ２の切断開
口部を加熱により溶融された熱溶融性フツ素樹脂
で閉塞するには、具体的には、破損が生じたフツ
素樹脂製チユーブ２の切断開口部に、熱溶融性フ
ツ素樹脂製の溶接棒４を挿入し、次いでこの状態
で、破損が生じたフツ素樹脂製チユーブ１の切断
開口部に、熱風ガンからの熱風を吹付けて熱溶融
性フツ素樹脂製溶接棒４を溶融させ、この溶接棒
４の外周面と破損が生じたフツ素樹脂製チユーブ
１の内周面とを一体化させればよい。あるいはま
た、破損が生じたフツ素樹脂製チユーブ１の切断
開口部に、この開口部を加熱しながら、加熱溶融
された熱溶融性フツ素樹脂を流し込むことによつ
て、破損が生じたフツ素樹脂製チユーブ２の切断
開口部を閉塞してもよい。 In order to close the cut opening of the damaged fluororesin tube 2 with heat-melting fluororesin melted by heating, specifically, the cut opening of the damaged fluororesin tube 2 is closed. A welding rod 4 made of heat-melting fluororesin is inserted into the tube, and then, in this state, hot air from a hot air gun is blown onto the cut opening of the damaged fluororesin tube 1 to melt it. What is necessary is to melt the welding rod 4 made of fluorine resin and integrate the outer circumferential surface of this welding rod 4 with the inner circumferential surface of the damaged fluorine resin tube 1. Alternatively, the damaged fluororesin tube 1 may be heated and melted by pouring heat-melted heat-melting fluororesin into the cut opening of the fluororesin tube 1 where the damage has occurred. The cutting opening of the resin tube 2 may be closed.
破損が生じたフツ素樹脂製チユーブ２の切断開
口部を閉塞するに際して、切断開口部の外周には
外枠リングが嵌挿されているので、加熱時にチユ
ーブ２の壁面が熱膨脹により外方に拡開しようと
しても、外枠リングによつてその拡開は阻止さ
れ、したがつて切断開口部周辺でのチユーブ２の
内周面と熱溶融性フツ素樹脂４の外周面とは圧着
されて強固に一体化される。 When closing the cut opening of the damaged fluororesin tube 2, an outer frame ring is fitted around the outer periphery of the cut opening, so that the wall surface of the tube 2 expands outward due to thermal expansion during heating. Even if an attempt is made to open the tube, the expansion is prevented by the outer frame ring, and the inner circumferential surface of the tube 2 and the outer circumferential surface of the thermofusible fluororesin 4 are crimped and firmly bonded around the cutting opening. will be integrated into.
上記のようにして破損が生じたチユーブ２を閉
塞した後、チユーブ２から外枠リングを除去すれ
ば、多管式フツ素樹脂製交換器の補修が終了す
る。 After closing the damaged tube 2 as described above, removing the outer frame ring from the tube 2 completes the repair of the multi-tubular fluororesin exchanger.
発明の効果
本発明に係る多管式フツ素樹脂製熱交換器の補
修方法によれば、破損が生じたフツ素樹脂製チユ
ーブの破損部を切断して除去した後、切断開口部
にこのチユーブの外周に沿うような外枠リングを
装着し、次いで切断開口部を加熱により溶融され
た熱溶融性フツ素樹脂で閉塞しているので、破損
が生じたチユーブの開口部閉塞時に、加熱によつ
てチユーブが変形することが防止され、しかも、
加熱時にチユーブの壁面が熱膨張により外方に拡
開するが外枠リングによつてその拡開は阻止さ
れ、したがつて切断開口部周辺でのチユーブ内周
面と熱溶融性フツ素樹脂の外周面とは、圧着され
て強固に一体化することができ、信頼性のある補
修方法が提供される。Effects of the Invention According to the method for repairing a multi-tubular fluororesin heat exchanger according to the present invention, after cutting and removing the damaged portion of a damaged fluororesin tube, the tube is inserted into the cut opening. An outer frame ring is installed along the outer circumference of the tube, and the cutting opening is then closed with heat-melting fluororesin that is melted by heating. This prevents the tube from deforming, and
During heating, the wall surface of the tube expands outward due to thermal expansion, but this expansion is prevented by the outer frame ring. The outer peripheral surface can be crimped and firmly integrated, providing a reliable repair method.
第１図および第２図は、本発明に係る多管式フ
ツ素樹脂製熱交換器の補修方法の説明図であり、
第３図は従来方法の説明図である。
１……破損部、２……破損が生じたチユーブ、
３……外枠リング、４……熱溶融性フツ素樹脂製
溶接棒。
FIGS. 1 and 2 are explanatory diagrams of a method for repairing a multi-tubular fluororesin heat exchanger according to the present invention,
FIG. 3 is an explanatory diagram of the conventional method. 1... Damaged part, 2... Tube where damage occurred,
3...Outer frame ring, 4...Welding rod made of heat-melting fluororesin.
Claims (1)
を切断して除去した後、切断開口部にこのチユー
ブの外周に沿うような外枠リングを装着し、次い
で切断開口部を、加熱により溶融された熱溶融性
フツ素樹脂で閉塞することを特徴とする多管式フ
ツ素樹脂製熱交換器の補修方法。1. After cutting and removing the damaged part of the fluororesin tube where damage has occurred, attach an outer frame ring along the outer circumference of the tube to the cut opening, and then attach the cut opening to a ring that is melted by heating. A method for repairing a multi-tubular fluororesin heat exchanger, characterized in that the heat exchanger is closed with a heat-melting fluororesin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15021286A JPS636396A (en) | 1986-06-26 | 1986-06-26 | Repair method for multitube type fluororesin-made heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15021286A JPS636396A (en) | 1986-06-26 | 1986-06-26 | Repair method for multitube type fluororesin-made heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS636396A JPS636396A (en) | 1988-01-12 |
| JPH0440638B2 true JPH0440638B2 (en) | 1992-07-03 |
Family
ID=15491981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15021286A Granted JPS636396A (en) | 1986-06-26 | 1986-06-26 | Repair method for multitube type fluororesin-made heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS636396A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0797152B2 (en) * | 1988-11-16 | 1995-10-18 | 三菱原子燃料株式会社 | Nuclear fuel assembly and assembling method thereof |
| US5188798A (en) * | 1988-11-16 | 1993-02-23 | Mitsubishi Nuclear Fuel Co. | Grid for nuclear fuel assembly |
-
1986
- 1986-06-26 JP JP15021286A patent/JPS636396A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS636396A (en) | 1988-01-12 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |