JPS6317508B2 - - Google Patents
Info
- Publication number
- JPS6317508B2 JPS6317508B2 JP54014933A JP1493379A JPS6317508B2 JP S6317508 B2 JPS6317508 B2 JP S6317508B2 JP 54014933 A JP54014933 A JP 54014933A JP 1493379 A JP1493379 A JP 1493379A JP S6317508 B2 JPS6317508 B2 JP S6317508B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- lining material
- lining
- liquid
- lined
- 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
- 239000000463 material Substances 0.000 claims description 62
- 239000007788 liquid Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 description 19
- 239000002184 metal Substances 0.000 description 9
- 238000007796 conventional method Methods 0.000 description 5
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000009751 slip forming Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は温度上昇により急速に硬化するウレタ
ン又はその類似品のような液状のライニング材料
を用いて、金属管等の長尺材の内面又は外面に、
あたかもテープを螺旋状に巻付けて行くような態
様で連続的にライニング被膜を形成して行くライ
ニング方法に関するものである。Detailed Description of the Invention [Industrial Field of Application] The present invention uses a liquid lining material such as urethane or a similar product that hardens rapidly with an increase in temperature to coat the inner surface or surface of a long material such as a metal pipe. On the outside,
The present invention relates to a lining method in which a lining film is continuously formed as if a tape is wound spirally.
熱硬化性の樹脂を用いて金属管の内面にライニ
ングを施す場合、気泡やピンホールの生成を防ぐ
と共に表面の平滑な厚い皮膜を得るために、従来
は遠心力を利用して定着する方法が採用されてい
る。
When lining the inner surface of a metal tube with a thermosetting resin, conventional methods used centrifugal force to fix the resin in order to prevent the formation of bubbles and pinholes and to obtain a thick film with a smooth surface. It has been adopted.
遠心力を利用した従来方法によれば、被ライニ
ング管を高速回転させる装置が不可欠であり、ま
た、管が正確な直線状でない場合には前記回転に
より振動等の不規則な挙動を惹起し良好なライニ
ングが見込めないため、被ライニング管の曲がり
をライニング施工に先立つて矯正する装置及びそ
の作業が必要となり、更には、遠心力の利用によ
る定着であるため管の内面にしか施工できず、場
合によつては、ライニング作業を加熱炉内で行な
う事態ともなつて、全体として装置が大がかりに
ならざるを得ない上、生産性も上らないという問
題がある。
According to the conventional method using centrifugal force, a device that rotates the pipe to be lined at high speed is essential, and if the pipe is not in an accurate straight line, the rotation may cause irregular behavior such as vibration. Since a suitable lining cannot be expected, equipment and work to straighten the bends in the pipe to be lined are required prior to lining construction.Furthermore, since fixation is performed using centrifugal force, it can only be applied to the inner surface of the pipe; In some cases, the lining work is carried out in a heating furnace, which results in a problem that the entire apparatus has to be large-scale and productivity is not improved.
本発明は上記のような従来技術に鑑み、温度上
昇により反応を起して急速に硬化する液状のライ
ニング材料を用い、簡単な装置によつて金属管の
内面や外面は勿論、その他長尺材にも容易に厚膜
のライニングを施すことのできる方法を提供する
ことを目的としてなされたもので、その構成は、
温度上昇により反応を起し急速に硬化する液状ラ
イニング材を、長尺管等をゆるやかに回転させな
がらその管の軸方向に相対移動させつつ当該管の
ライニングを施すべき面に所定幅で連続的且つ略
均等に供給することにより螺旋帯状に連続塗着
し、この塗着されるライニング材が偏在流失しな
い時間内に前記塗着される部分を連続的に昇温さ
せて急速に硬化させることを特徴とするものであ
る。
In view of the above-mentioned prior art, the present invention uses a liquid lining material that reacts and hardens rapidly when temperature rises, and uses a simple device to coat not only the inner and outer surfaces of metal pipes but also other long materials. The purpose was to provide a method that could easily apply a thick film lining to
The liquid lining material, which reacts and hardens rapidly when the temperature rises, is applied continuously over a predetermined width to the surface of the pipe to be lined while gently rotating the long pipe and moving it relatively in the axial direction of the pipe. Furthermore, by supplying the lining material approximately evenly, the lining material is continuously applied in a spiral band shape, and the temperature of the part to be applied is continuously raised to rapidly cure the applied lining material within a time period in which the applied lining material is not unevenly distributed and washed away. This is a characteristic feature.
即ち、本発明は、例えば、金属管の内面にライ
ニングを施す場合、従来の遠心力を利用する方法
と異なり、急速硬化性の液状ライニング材を使用
し、このライニング材を、管をゆつくりと回転さ
せているとき、管の軸方向に相対移動させ乍ら所
定幅でライニングすべき面に連続的に供給して塗
着させ、塗着されるライニング材が流動状態にあ
る部分、或は、流動状態にある時間が小さい間に
おいてそのライニング材を順次硬化させる局部的
ライニングを連続的に進行させて行くことによ
り、あたかも所定幅のテープをライニングを施し
たい面に螺旋帯状に巻付けていくような態様で、
液状ライニング材により連続ライニングを可能と
したもので、これによりたとえライニングを施工
しようとする管に多少の撓みや偏平、或は、曲が
り等の変形があつても、液状のライニング材が偏
在したり流失したりすることなく、ほぼ一様で厚
膜のライニングが可能になり、この他、管の外面
や、ロール等の金属長尺材、或は、異形管にも前
記と同様のライニングが可能になる。
That is, for example, when lining the inner surface of a metal tube, unlike the conventional method of using centrifugal force, the present invention uses a rapidly hardening liquid lining material, and gently applies this lining material to the tube. While rotating, the lining material is continuously supplied and applied to the surface to be lined with a predetermined width while relatively moving in the axial direction of the pipe, and the lining material to be applied is in a fluid state, or By continuously progressing local lining, which hardens the lining material one after another while it remains in a fluid state for a short time, it is as if a tape of a predetermined width is wrapped in a spiral band shape around the surface to be lined. In such a manner,
Continuous lining is possible using a liquid lining material, so even if the pipe to be lined has some deformation such as bending, flattening, or bending, the liquid lining material will not be unevenly distributed. It is possible to line an almost uniform thick film without washing away, and it is also possible to line the outside surface of the pipe, long metal materials such as rolls, or irregularly shaped pipes in the same way as above. become.
次に、本発明の実施例を、金属管の内面にライ
ニングを施す場合を示した図に拠り説明する。
Next, an embodiment of the present invention will be described with reference to a diagram showing a case where the inner surface of a metal tube is lined.
第１図において、Ｐはその内面ライニングを施
すべき比較的大径の例えば1000mmφの管、Ｆは該
管Ｐをその上に載せて回転させる回転台、ここで
液状ライニング材の供給装置は、先端に適宜幅の
ノズル１１を有する槍１を主体に形成されてお
り、この槍１はそのノズル１１から液状のライニ
ング材Ｌを前記管Ｐのライニングを施すべき面に
所定幅で注ぎつつ、後退（図の右方）移動するよ
うにされている。 In Fig. 1, P is a relatively large diameter pipe, for example, 1000 mmφ, to which the inner surface is to be lined, F is a rotary table on which the pipe P is placed and rotated, and the liquid lining material supply device is at the tip. The spear 1 is mainly formed of a spear 1 having a nozzle 11 of a suitable width, and this spear 1 is designed to retreat ( (right side of the figure).
Ｈは管Ｐを局部的に加熱し、局部的に供給塗着
される液状ライニング材の昇温硬化を生起又は促
進させるために設けたガスバーナーによる加熱装
置で、ここでは加熱装置Ｈが上記槍１のノズル１
１と同方向に略同速で移動するようにされてい
る。尚、加熱は液状のライニング材Ｌ自体を加熱
することもある。 H is a heating device using a gas burner provided to locally heat the pipe P to cause or accelerate temperature rise hardening of the liquid lining material that is locally supplied and applied; here, the heating device H is the above-mentioned spear 1 nozzle 1
It is arranged to move in the same direction as 1 and at approximately the same speed. Incidentally, the heating may involve heating the liquid lining material L itself.
而して、上記第１図は管Ｐの内面に、所定幅の
テープを連続して螺旋状に貼りつけて行くような
形態で液状ライニング材による連続ライニングを
施す方法の実施状態の一例を示すもので、ここで
は、槍１の先端部辺に扇形のフレーム１２を取付
けると共に、該フレーム１２の両側下部に車輪１
３を転動自在に取附ける一方、フレーム１２に
は、車輪１３の軸と平行な軸上に転動自在に軸着
した上記ノズル１１の幅より長い做しローラ１４
が設けられている。 FIG. 1 above shows an example of a method of continuously lining the inner surface of the pipe P with a liquid lining material by continuously pasting tape of a predetermined width in a spiral manner. Here, a fan-shaped frame 12 is attached to the tip side of the spear 1, and wheels 1 are attached to the bottom of both sides of the frame 12.
3 is rotatably attached to the frame 12, and the roller 14, which is longer than the width of the nozzle 11, is rotatably mounted to the frame 12 on an axis parallel to the axis of the wheel 13.
is provided.
上記装置によるライニング施工に際しては、ノ
ズル１１と加熱装置Ｈを管の始端部に配し、管Ｐ
を図の反時計方向にゆつくりと回転させると共
に、ノズル１１からライニング材Ｌを管Ｐ内に供
給しながら、ライニング材の供給装置である槍１
のノズル１１と加熱装置Ｈを一緒に同速度で図の
右方へ移動させ、供給される液状のライニング材
Ｌを管Ｐの内壁に連続的に付着させつつ、管Ｐの
回転につれ塗着された直後のライニング材Ｌをロ
ーラ１４により均一に做し、加熱装置Ｈ上で所定
温度に加熱して、当該液状のライニング材Ｌを順
次連続的に硬化させていくことにより、管Ｐの内
面にあたかも所定幅のテープを螺旋状に巻付けて
行くような態様で、ライニング被膜Laを連続的
に形成するのである。 When lining the pipe using the above device, the nozzle 11 and the heating device H are placed at the starting end of the pipe, and the
While slowly rotating the lining material L in the counterclockwise direction in the figure, and supplying the lining material L into the pipe P from the nozzle 11, the lance 1, which is the lining material supply device,
The nozzle 11 and the heating device H are moved together at the same speed to the right in the figure, and while the supplied liquid lining material L is continuously deposited on the inner wall of the pipe P, it is coated as the pipe P rotates. The lining material L immediately after the treatment is uniformly rolled by the roller 14, heated to a predetermined temperature on the heating device H, and the liquid lining material L is sequentially and continuously hardened, thereby forming a coating on the inner surface of the pipe P. The lining film La is continuously formed as if a tape of a predetermined width is wound spirally.
ここで、管Ｐのゆつくりした回転速度と、液状
ライニング材の供給装置たる槍１及び加熱装置Ｈ
の移動速度は、液状ライニング材Ｌが管内に偏在
したり管外に流失することのないように適切に制
御され、これにより管Ｐの内面にくまなく均一な
ライニング被膜Laを形成することができるので
ある。 Here, the slow rotational speed of the pipe P, the spear 1 serving as the liquid lining material supply device, and the heating device H
The moving speed of is appropriately controlled to prevent the liquid lining material L from being unevenly distributed within the pipe or flowing out of the pipe, thereby making it possible to form a uniform lining film La all over the inner surface of the pipe P. It is.
尚、上記実施例におては、管Ｐを定位置で回転
させ、ライニング材供給装置たる槍１と加熱装置
Ｈを同期して移動させながら、内面ライニングを
施す例について述べたが、ライニング材の供給装
置たる槍１と加熱装置Ｈを固定し、管Ｐをゆつく
りと回転させながら、この管自体を移動させるよ
うにしてもよく、またライニング面は管の外面に
も上記例と同要領で施工することができる。 In the above embodiment, an example was described in which inner lining is applied while rotating the pipe P in a fixed position and moving the spear 1, which is a lining material supply device, and the heating device H in synchronization. The lance 1 serving as the supply device and the heating device H may be fixed, and the tube itself may be moved while slowly rotating the tube P. Also, the lining surface may be applied to the outer surface of the tube in the same manner as in the above example. It can be constructed with.
更に、上記実施例では被ライニング材を大口径
の管としたが、本発明はこのような管以外の長尺
材のライニングにも適用できることは勿論、本発
明の思想を応用して異形管にライニングを施すこ
とも可能である。 Furthermore, in the above embodiments, the material to be lined was a large-diameter pipe, but the present invention can of course be applied to lining long materials other than such pipes, and the idea of the present invention can also be applied to irregularly shaped pipes. It is also possible to provide a lining.
而して、実際のライニング施工に際しては、従
来方法と同様に前処理、例えばブラストを行なつ
た後、プライマー塗布を行ない、また、施工終了
後は常温又は加熱炉等による加熱して、ライニン
グ材Ｌを完全に固化させるものとする。 Therefore, when actually constructing the lining, the lining material is coated with a primer after pretreatment, such as blasting, as in the conventional method. Let L be completely solidified.
本発明方法は上述のような液状ライニング材の
供給態様と加熱態様を採ることにより、液状ライ
ニング材Ｌが流動状態にある部分を比較的小面積
に形成していきつつその部分の反応硬化を連続的
に進めるから、管にあつては、その曲がりなどを
無視してライニング施工をすることができる。即
ち、管の長さが12ｍにもなると、５〜６mmの曲が
りは普通であるが、その一部である30cm程度につ
いて見れば、殆んど曲がりのない直管と同じにな
るからである。 The method of the present invention uses the supply mode and heating mode of the liquid lining material as described above, thereby forming the portion where the liquid lining material L is in a fluid state into a relatively small area while continuously reaction-curing that portion. Since the pipes can be lined in a straight forward direction, lining can be carried out without worrying about bends in the pipes. That is, when the length of a pipe reaches 12 m, it is normal for the pipe to have a bend of 5 to 6 mm, but if you look at a part of the pipe of about 30 cm, it becomes the same as a straight pipe with almost no bends.
尚、本発明はその実施に際して、被ライニング
材の回転速度、ライニング材の粘度、加熱方法の
相互の関係及びライニング材の供給位置と加熱位
置を適切にすることが望ましい。また、ライニン
グ被膜の厚みはライニング材の粘度により調節で
きるが、一回の施工で所定の膜厚を得られない場
合は、２回以上施工して所定の膜厚を得るように
すればよい。一方、ライニング材の物性によつて
は、被ライニング材を、前記ライニング材が急速
反応を起さない温度範囲で予熱しておいてもよ
い。 In carrying out the present invention, it is desirable that the rotational speed of the material to be lined, the viscosity of the lining material, the relationship among the heating method, and the supply position and heating position of the lining material be appropriate. Further, the thickness of the lining film can be adjusted by adjusting the viscosity of the lining material, but if the desired film thickness cannot be obtained in one application, it may be applied two or more times to obtain the desired film thickness. On the other hand, depending on the physical properties of the lining material, the material to be lined may be preheated to a temperature range in which the lining material does not cause a rapid reaction.
ここで、管のライニングに際しては、その始動
時に、ライニング材の流出を防ぐため、管端部に
一定高さ（所定のライニング被膜の厚み相当）の
堰を設けたり、施工中、ライニング材の粘度が低
くて、それが過流動するのを防ぐため、例えば、
槍１に上記扇形フレーム１２のような形状の遮蔽
板を設けることがある。 When lining a pipe, in order to prevent the lining material from flowing out when the pipe is started, a weir of a certain height (equivalent to the thickness of the prescribed lining film) is installed at the end of the pipe, and during construction, the viscosity of the lining material is low and prevents it from overflowing, e.g.
The spear 1 may be provided with a shielding plate shaped like the fan-shaped frame 12 described above.
また、液状ライニング材の供給装置のノズルに
案内を付けて、ライニング材を管壁に付着し易く
したり、ライニング面を平滑にするため、ロー
ル、へら等で該面をなでるようにしてもよい。 Additionally, a guide may be attached to the nozzle of the liquid lining material supply device to make it easier for the lining material to adhere to the pipe wall, or to smooth the lining surface with a roll, spatula, etc. .
次に本発明方法により金属管に内面ライニング
を施工した例を示す。 Next, an example of applying an inner lining to a metal pipe using the method of the present invention will be shown.
施工例 １
ライニング材 ウレタン（２液混合後のゲル化時
間が、20℃で約60秒、60℃で約２秒のも
の）
管 40B×６ｍ鋼管
加熱装置 パイプに水平に設置した20cm長のガス
バーナー
管の回転速度 20ｍ／min
ライニング材供給装置及び加熱装置の移動速度
10mm／sec
ライニング材供給量 2.7Kg／10sec
加熱位置 ライニング材の供給位置より120゜遅れ
加熱温度 60℃
以上により、第１図々示の方法で、管に内面ラ
イニングを施したところ、その内面に膜厚６mmの
ライニング被膜の施された内面ライニング管が得
られた。Construction example 1 Lining material Urethane (gelation time after mixing the two liquids is approximately 60 seconds at 20℃ and approximately 2 seconds at 60℃) Pipe 40B x 6m steel pipe heating device 20cm long gas installed horizontally on the pipe Burner tube rotation speed 20m/min Movement speed of lining material supply device and heating device
10mm/sec Lining material supply rate 2.7Kg/10sec Heating position: 120° behind the lining material supply position Heating temperature: 60°C or more. An inner-lined tube with a lining film having a thickness of 6 mm was obtained.
本発明は上述の通りであつて、温度上昇により
反応を起し急速硬化するウレタン又はその類似品
のような液状のライニング材を用い、この液状ラ
イニング材を、長尺管等をゆるやかに回転させ乍
らその管の軸方向に相対移動させつつ当該管のラ
イニングを施すべき面に、所定幅で連続且つ略均
等に供給して塗着し、この塗着された未硬化のラ
イニング材が偏在流失しない間において上記塗着
部を連続的に昇温させて急速に硬化させることに
より、液状ライニング材をあたかもテープを巻付
けて行くような態様で連続的にライニング被膜を
形成する方法であるから、長尺材に少々の曲がり
や偏平、歪み等があつても、管の内面又は外面の
いずれであつても全体に均一な厚いライニング被
膜を容易に形成することができ、特に金属管の内
面ライニングに適用すれば、前述した従来方法の
問題点を解決することができる。
The present invention is as described above, and uses a liquid lining material such as urethane or a similar product that reacts and hardens rapidly when the temperature rises, and the liquid lining material is applied by gently rotating a long pipe or the like. However, the lining material is continuously and approximately evenly supplied to the surface of the pipe to be lined in a predetermined width while moving relatively in the axial direction of the pipe, and the applied uncured lining material is unevenly distributed and washed away. This is a method in which a lining film is continuously formed using a liquid lining material in a manner similar to wrapping a tape, by continuously raising the temperature of the coating area and rapidly curing it while the coating is not being applied. Even if the long material is slightly bent, flattened, distorted, etc., it is possible to easily form a uniform thick lining coating on the entire inner or outer surface of the pipe, especially for the inner lining of metal pipes. If applied to this method, the problems of the conventional method described above can be solved.
第１図は本発明方法により金属管の内面にライ
ニングを施す一例の斜視図、第２図は第１図の側
面図である。
Ｐ…金属管、Ｆ…回転台、１…ライニング材供
給装置たる槍、Ｌ…ライニング材、Ｈ…加熱装
置、La…ライニング被膜。
FIG. 1 is a perspective view of an example of lining the inner surface of a metal tube by the method of the present invention, and FIG. 2 is a side view of FIG. 1. P...metal tube, F...rotating table, 1...spear serving as a lining material supply device, L...lining material, H...heating device, La...lining coating.
Claims (1)
状ライニング材を、長尺管等をゆるやかに回転さ
せながらその管の軸方向に相対移動させつつ当該
管のライニングを施すべき面に所定幅で連続的且
つ略均等に供給することにより螺旋帯状に連続塗
着し、この塗着されるライニング材が偏在流失し
ない時間内に前記塗着される部分を連続的に昇温
させて急速に硬化させることを特徴とする長尺材
のライニング方法。1. A liquid lining material that reacts and hardens rapidly when the temperature rises is continuously applied over a predetermined width to the surface of the long pipe, etc., which is to be lined, while gently rotating the pipe and moving it relatively in the axial direction of the pipe. Continuous coating in a spiral band shape by supplying the lining material precisely and approximately evenly, and continuously raising the temperature of the coated part to rapidly cure the coated lining material within a time period in which the coated lining material is not unevenly distributed and washed away. A method for lining long materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1493379A JPS55107425A (en) | 1979-02-14 | 1979-02-14 | Lining method of long sized material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1493379A JPS55107425A (en) | 1979-02-14 | 1979-02-14 | Lining method of long sized material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55107425A JPS55107425A (en) | 1980-08-18 |
| JPS6317508B2 true JPS6317508B2 (en) | 1988-04-14 |
Family
ID=11874760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1493379A Granted JPS55107425A (en) | 1979-02-14 | 1979-02-14 | Lining method of long sized material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55107425A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE435866B (en) * | 1983-04-06 | 1984-10-22 | Vj System Ab | PROCEDURE AND DEVICE FOR LINING OF PIPES, WITH A FLEXIBLE, HARDENABLE PLASTIC CONTAINING HOSE |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5278247A (en) * | 1975-12-25 | 1977-07-01 | Daiichi Koshuha Kogyo Kk | Lining method and apparatus thereof |
| JPS52103466A (en) * | 1976-02-26 | 1977-08-30 | Uchiyama Mfg | Method of adhering synthetic resin layer onto metallic pipe interior |
| JPS5329684U (en) * | 1976-08-17 | 1978-03-14 |
-
1979
- 1979-02-14 JP JP1493379A patent/JPS55107425A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5278247A (en) * | 1975-12-25 | 1977-07-01 | Daiichi Koshuha Kogyo Kk | Lining method and apparatus thereof |
| JPS52103466A (en) * | 1976-02-26 | 1977-08-30 | Uchiyama Mfg | Method of adhering synthetic resin layer onto metallic pipe interior |
| JPS5329684U (en) * | 1976-08-17 | 1978-03-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55107425A (en) | 1980-08-18 |
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