JPH01234693A - Method of preventing corrosion of pipe connecting part - Google Patents
Method of preventing corrosion of pipe connecting partInfo
- Publication number
- JPH01234693A JPH01234693A JP6151088A JP6151088A JPH01234693A JP H01234693 A JPH01234693 A JP H01234693A JP 6151088 A JP6151088 A JP 6151088A JP 6151088 A JP6151088 A JP 6151088A JP H01234693 A JPH01234693 A JP H01234693A
- Authority
- JP
- Japan
- Prior art keywords
- corrosion
- cover
- adhesive layer
- pipe
- adhesive
- 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.)
- Granted
Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 42
- 230000007797 corrosion Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 8
- 239000012790 adhesive layer Substances 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims description 11
- 238000005536 corrosion prevention Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 20
- 230000001070 adhesive effect Effects 0.000 abstract description 20
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 abstract description 11
- 239000001263 FEMA 3042 Substances 0.000 abstract description 11
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 abstract description 11
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 abstract description 11
- 229920002258 tannic acid Polymers 0.000 abstract description 11
- 229940033123 tannic acid Drugs 0.000 abstract description 11
- 235000015523 tannic acid Nutrition 0.000 abstract description 11
- 239000011248 coating agent Substances 0.000 abstract description 9
- 238000000576 coating method Methods 0.000 abstract description 9
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 229920005549 butyl rubber Polymers 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000000452 restraining effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 239000007864 aqueous solution Substances 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000003112 inhibitor Substances 0.000 description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229920002253 Tannate Polymers 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 150000002334 glycols Chemical class 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000004264 Petrolatum Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000019271 petrolatum Nutrition 0.000 description 1
- 229940066842 petrolatum Drugs 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は管と管とを接続する管継手の防食工法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for preventing corrosion of a pipe joint that connects pipes.
管接続部分を水密状に囲繞被覆する為に、例えば実開昭
５４−９２４３０号公報番こ記載のような管継手のカバ
ーが知られている。同公報に記載の考案は、折重ね式に
形成したシートの内面に管継手の形秋に適合する凹みを
対称形に設け、内面全面に粘着剤を塗布してなるもので
ある。In order to surround and cover a pipe connection portion in a watertight manner, a cover for a pipe joint is known, for example, as described in Japanese Utility Model Application Publication No. 54-92430. The invention described in the publication is made by forming symmetrical depressions on the inner surface of a sheet formed in a folded manner to fit the shape of a pipe joint, and applying an adhesive to the entire inner surface.
上記従来の防食カバーは内面全面に粘着剤が塗布されて
いるので、管継手に装着する際に管継手の一部が粘着剤
に触れただけで粘着し、修正するために離そうとすると
成形したシートが変形したりして作業性が悪（、所定位
置に装置することが困難であり、その結果水密性が不完
全で防食効果の信頼性に問題かあった。The conventional anti-corrosion cover mentioned above has adhesive applied to the entire inner surface, so when it is attached to a pipe fitting, just a part of the pipe touching the adhesive will cause it to stick, and if you try to remove it to repair it, it will form. The sheet was deformed, resulting in poor workability (and it was difficult to install the device in a predetermined position, resulting in incomplete watertightness and problems with the reliability of the anticorrosion effect).
本発明の管接続部の防食工法は上記の問題点を解消せん
としてなされたものであって、その要旨は、内面に粘着
剤層が形成された防食カバーを管接続部に被覆する管接
続部の防食工法番ごおいて、防食カバーの粘着剤層面又
は管接続部の表面の少なくとも何れか一方に粘着抑制物
質を塗布して防食カバーを管接続部に被覆することを特
徴とする管接続部の防食工法に存する。The anti-corrosion method for pipe connections of the present invention has been developed to solve the above-mentioned problems. A pipe connection part characterized in that the corrosion protection cover is coated on the pipe connection part by applying an adhesion suppressing substance to at least either the adhesive layer surface of the corrosion protection cover or the surface of the pipe connection part. The anti-corrosion method is
本発明で使用されるカバー本体は、管接続部明細書の浄
書（内容に変更なし）
を覆う形状とされ、ポリ塩化ビニル、ポリエチレン、ポ
リプロピレン、ＡＢＳ等の熱可塑性樹脂、又はこれらの
樹脂が発泡体となされたもの、又はガラス繊維強化ポリ
エステル等の合成樹脂で製せられたものが好−ましい。The cover body used in the present invention has a shape that covers the engraving of the pipe connection specification (no change in content), and is made of thermoplastic resin such as polyvinyl chloride, polyethylene, polypropylene, ABS, or foamed resin. Preferably, the material is made from a synthetic resin such as glass fiber reinforced polyester or the like.
また、そのカバー本体は分割された複数の分割片からな
るものであっても、又、複数の分割片の一側縁同士が連
続し、その連続部で開削可能になされたものであっても
よい。Furthermore, even if the cover body is made up of a plurality of divided pieces, or one side edge of the plurality of divided pieces is continuous with each other, and the continuous part can be cut and cut. good.
又、粘着剤層と１２ではブチルゴム等の合成ゴムもしく
け天然ゴムを主成分とするゴム系粘着剤、又はペトロラ
タム系防錆グリース類を主成分とする粘着剤等が用いら
れる。該粘着剤層面には使用前にゴミ等が付着したり、
不必要に他の物と粘着するのを防ぐ為に剥離紙を設けて
おくのが好ましい。In addition, for the adhesive layer and 12, a rubber adhesive whose main component is synthetic rubber such as butyl rubber or natural rubber, or an adhesive whose main component is petrolatum-based anticorrosion grease, etc. is used. Do not allow dust or the like to adhere to the surface of the adhesive layer before use.
It is preferable to provide a release paper to prevent unnecessary adhesion to other objects.
粘着抑制物質とは、防食カバーの粘着剤層の粘着力を一
時的に抑制し、粘名剤層が管接続部表面に触れた段階で
は強い粘着性を示さず、その後再び粘着力を回復する物
質をいう。Adhesion inhibitors temporarily suppress the adhesive force of the adhesive layer of the anti-corrosion cover, and when the adhesive layer touches the surface of the pipe connection, it does not exhibit strong adhesiveness, but then regains its adhesive strength. Refers to matter.
このような粘着抑制物質としては、メチルアルコール、
エチルアルコール等のアルコール類、エチレングリコー
ル、プロピレングリコール等のグリコール類、防錆油、
タンニン酸水溶液等があり、特にエチレングリコール、
０．３〜１％濃度のタンニン酸水溶液が好適である。こ
の粘着抑制物質を粘着剤層面又は管接続部表面に厚く塗
布すると粘着剤層が管接続部表面に圧接されたとき、例
えば防食カバーの合せ面の粘着剤表面や接合部の管表面
に粘着抑制物質が押し田されて好ましくない。又、粘着
抑制物質の塗膜が厚いと粘着力の再現性が悪くなるので
できるだけ薄（塗ることが好ましい。このため粘着抑制
物質の粘度は１００ｃｐｓ（２０”Ｃ）以下とし、余分
の塗液は直ちに流れ去るようにしておくのが好ましく、
又、このように低い粘度とする方がハケ塗りやスプレー
塗りの作業性がよい。Such adhesion inhibitors include methyl alcohol,
Alcohols such as ethyl alcohol, glycols such as ethylene glycol and propylene glycol, rust preventive oil,
There are tannic acid aqueous solutions, especially ethylene glycol,
An aqueous solution of tannic acid with a concentration of 0.3-1% is preferred. If this adhesion suppressing substance is applied thickly to the surface of the adhesive layer or the surface of the pipe connection part, when the adhesive layer is pressed against the surface of the pipe connection part, for example, the adhesion will be suppressed on the adhesive surface of the mating surface of the anti-corrosion cover or the surface of the pipe at the joint part. This is not desirable as the material is compressed. In addition, if the coating film of the adhesion inhibitor is too thick, the reproducibility of the adhesive force will deteriorate, so it is preferable to apply it as thinly as possible.For this reason, the viscosity of the adhesion inhibitor should be 100 cps (20"C) or less, and excess coating liquid should be removed. It is preferable to allow it to flow away immediately;
Also, such a low viscosity makes it easier to apply with a brush or spray.
粘着抑制物質としてアルコール類、グリコール類、防錆
油を用いた場合、これらは前記粘着剤に対して相溶性を
有するので該物質を塗布した粘着剤層を管接続部表面に
圧接しておくと該物質は徐々に粘着剤中へ移行して粘着
抑制作用は消失すると共に粘着力は再現し、防食カバー
は管接続部に経時と共に完全に合着する。又、該物質と
してタンニン酸水溶液を用いた場合には、粘着剤層面又
は負継手表面の訃水溶液の水の存在によって初期のうち
は粘着性を抑制し、同時にタンニン酸は管接続部の鉄表
面にタンニン酸鉄の皮膜を形成し腐食の発生を防止する
。When using alcohols, glycols, or rust preventive oils as adhesion inhibitors, these are compatible with the adhesive, so if the adhesive layer coated with the substance is pressed against the surface of the pipe connection part, The substance gradually migrates into the adhesive, the adhesion-inhibiting effect disappears, and the adhesion is restored, and the anticorrosion cover completely adheres to the pipe connection over time. In addition, when a tannic acid aqueous solution is used as the substance, the tackiness is initially suppressed by the presence of water in the aqueous solution on the adhesive layer surface or the surface of the negative joint, and at the same time, tannic acid suppresses the tackiness on the iron surface of the pipe connection. A film of iron tannate is formed on the surface to prevent corrosion.
また、被覆された初期に粘着性を抑制していた水分は土
圧の作用も手伝って徐々に防食カバーと管接合部との間
の空間へ蒸発し、これに伴って粘着力は再現し防食カバ
ーと管接続部は経時と共に完全密着する。そして防食カ
バーと管接合部との間の空間へ蒸発した水分は再び粘着
剤層面へ浸入することなり、艮期間にわたり信頼性のあ
る水密性が得られる。In addition, the moisture that suppressed the adhesion in the initial stage of coating gradually evaporates into the space between the anti-corrosion cover and the pipe joint due to the effect of earth pressure, and as a result, the adhesion is restored and anti-corrosion is achieved. The cover and the pipe connection become completely tightly attached over time. The moisture that has evaporated into the space between the anti-corrosion cover and the pipe joint will again enter the surface of the adhesive layer, providing reliable watertightness over the installation period.
」二記粘着抑制物狛は施工にあたり粘着剤層面又は管接
続部表面の何れか一方、又は両方に塗布するのであるが
、粘着剤層面に塗布する場合明細書の浄書（内容に変更
なし）
はその全面に、又、管接続部表面に塗布する場合は例え
ばフランジの咽部や７ランジを固定するボルト、ナンド
等のような防食カバーの粘着剤層に接触し易い凸部部分
に塗布するのが効果的である。When applying the adhesion suppressor (2), it is applied to either the adhesive layer surface or the pipe connection surface, or both, but if it is applied to the adhesive layer surface, the engraving of the specification (no change in content) is When applying to the entire surface of the pipe connection, apply it to convex parts that are likely to come into contact with the adhesive layer of the anti-corrosion cover, such as the throat of the flange, the bolts and nands that fix the 7-lunge, etc. is effective.
又、この粘着抑制物質の塗布は・・ケ塗りやスプレー塗
布で行えばよい。Further, the adhesion suppressing substance may be applied by coating or spraying.
尚、粘着抑制物質は接合される管とこの管に直接被覆さ
れる防食カバーの管被覆部の粘着剤層面には塗布しない
方が初期から強い粘着力で防食カバーと管表面とを密着
させるので、外部からの水の浸入を防ぎ、防食効果上好
ましい。In addition, it is better not to apply the adhesion suppressing substance to the adhesive layer of the tube coating part of the corrosion protection cover that is directly coated on the pipe to be joined, as this will cause the corrosion protection cover and the pipe surface to stick together from the beginning with a strong adhesive force. , which prevents water from entering from the outside and is preferable for its anticorrosion effect.
次に本発明の実施例を図面を参照し乍ら説明する。 Next, embodiments of the present invention will be described with reference to the drawings.
第３図に於て、ａは管継手であり、鋼管２゜２′の夫々
一端に溶接されたフランジ１，１′がボルト・ナツト３
，３′、・で接合さハている。In Fig. 3, a is a pipe joint, in which flanges 1 and 1' welded to one end of a steel pipe 2 and 2' respectively are bolts and nuts 3.
, 3', and are joined.
４けこのように接合された鉄フランジ１，１′の周縁部
及びボルト・ナノ）３，３．・・に１％タ明細書の浄書
（内容に変更なし）
ンニン酸水溶液を７・りで塗布した塗布部分である。第
２図５は防食カバーであり、防食カバー５Ｖｉ対称形の
２個の分割片５ａ、５ｂからなり、各々分割片５ａ、５
ｂは管継手の外径にほぼ適合した形状を有し、この管継
手を被覆する力・ぐ−本体５１．５１と、該カバー本体
５１．５１の両端部から外方へ延設され、管継手に接続
される鋼管の外形に沿う形状を有する管被覆部５２．５
２及びカバー本体５１．５１から管被覆部５２．５２へ
かけてその両端縁には合せ部５３．５３が形成されてい
る。4. The peripheral edge of the iron flange 1, 1' joined in a manner of 4 holes and the bolt nano) 3, 3. ...An engraving of the 1% TA specification (no changes to the contents) This is the area where the aqueous solution of nitric acid was applied at 7. FIG. 2 5 shows a corrosion-proof cover, which consists of two symmetrical divided pieces 5a and 5b.
b has a shape that approximately matches the outer diameter of the pipe joint, and includes a force/glue body 51.51 that covers the pipe joint, and extends outward from both ends of the cover body 51.51 and covers the pipe. Pipe covering part 52.5 having a shape that follows the outer shape of the steel pipe connected to the joint
2 and cover main body 51.51 to tube covering portion 52.52, and mating portions 53.53 are formed at both end edges thereof.
上記分割片５ａ、５ｂの内面全面には未加硫のブチルゴ
ムを主成分とする粘着剤からなる粘着剤層６が略均−な
厚さで設けられている。５４ｆｉ管被覆部５２．５２で
鋼管２，２′を被覆したあと管被覆部５２をその外面か
ら締めつけるためのバンド挿通孔である。An adhesive layer 6 made of an adhesive whose main component is unvulcanized butyl rubber is provided on the entire inner surface of the divided pieces 5a, 5b with a substantially uniform thickness. This is a band insertion hole for tightening the tube covering part 52 from the outer surface after the steel pipes 2, 2' are covered with the 54fi pipe covering part 52.52.
このようになされた防食カバー５を第３図の管継手ａ及
びその両側の鋼管２，２′にタンニン酸水溶液が未乾燥
のうちに被覆し、合せ部５３゜明細書の浄書（内容に変
更なし）
５３を合せ、バンド押通孔５４にバンド（図示せず）を
挿通して締め、固定した。第１図は管継手ａ及び鋼管２
，２′が防食カバー５によって被覆された状態の断面図
である。防食カバーを管継手ａに被覆するに際し、管継
手３表面にはタンニン酸水溶液が塗布されているためカ
バー本体５１内面の粘着剤６に管継手ａの７ランジ１．
１′の周縁部やボルト・ナツト３が触れても粘着するこ
となく極めて容易に装置することができた。これを土中
に埋設し２０日後に防食カバーを切開し、該防食カバー
と鉄７ランジとの接着状態を観察したところ、鉄フラン
ジのタンニン酸水溶液を塗布した部分はタンニン酸鉄の
黒色被膜が生じたが腐食は発生せず、鉄７ランジ外周面
と粘着剤とは完全に接着され、更にタンニン酸水溶液を
塗布したボルト・ナツトと粘着剤とが接した部分も同様
によく接着していた。The anti-corrosion cover 5 made in this way is applied to the pipe fitting a in Fig. 3 and the steel pipes 2 and 2' on both sides thereof while the tannic acid aqueous solution is still wet. None) 53 were aligned, and a band (not shown) was inserted into the band push-through hole 54 and tightened to fix it. Figure 1 shows pipe fitting a and steel pipe 2.
, 2' are covered with an anti-corrosion cover 5. When applying the anti-corrosion cover to the pipe fitting a, since an aqueous tannic acid solution is applied to the surface of the pipe fitting 3, the adhesive 6 on the inner surface of the cover body 51 is coated with the 7 flange 1 of the pipe fitting a.
The device could be installed extremely easily without sticking even when the peripheral edge of 1' or the bolt/nut 3 was touched. This was buried in the soil, and 20 days later, the anti-corrosion cover was cut open and the state of adhesion between the anti-corrosion cover and the iron 7 flange was observed.The part of the iron flange to which the tannic acid aqueous solution was applied was found to have a black coating of iron tannate. However, no corrosion occurred, and the adhesive was completely adhered to the outer peripheral surface of the iron 7 flange, and the areas where the adhesive came into contact with the bolts/nuts coated with tannic acid aqueous solution were also adhered well. .
又、管継手側にはタンニン酸水溶液を塗布せず、防食カ
バーの粘着剤にのみ塗布したものでも同様な結果が得ら
れた。Similar results were also obtained when the tannic acid aqueous solution was not applied to the pipe fitting side, but only applied to the adhesive of the anticorrosive cover.
本発明によると上述の構成となされているので以下の作
用効果を奏する。According to the present invention, having the above-described configuration, the following effects can be achieved.
防食カバーの粘着剤層面又は管接続部表面の少なくとも
何れか一方に粘着抑制物質を塗布するので、管接続部を
防食カバーで被覆する際に防食カバー内面の粘着剤層と
管継手とが粘着しないので、防食カバーの位置ずれ等を
修正することが極めて容易であり、防食カバーが変形し
たりすることなく作業性よく正確な位置に装着でき、信
頼性のある防食効果が得られる。Since an adhesion suppressing substance is applied to at least either the adhesive layer surface of the anti-corrosion cover or the surface of the pipe connection part, the adhesive layer on the inner surface of the anti-corrosion cover and the pipe joint do not stick together when the pipe connection part is covered with the anti-corrosion cover. Therefore, it is extremely easy to correct misalignment of the anti-corrosion cover, and the anti-corrosion cover can be installed in an accurate position with good workability without being deformed, and a reliable anti-corrosion effect can be obtained.
防食力・（−を被覆したあとは粘着剤表面の粘着力は経
時的に回復し、管接続部表面と防食カバーは完全に密着
されるので完全な水密性が得られる。Corrosion prevention power: After coating (-), the adhesive strength of the adhesive surface recovers over time, and the pipe connection surface and the corrosion protection cover are completely adhered to each other, resulting in complete watertightness.
本発明によれば管接続部表面又は防食カバー内面の粘着
剤層面の少くとも何れか一方に粘着抑制物質を塗布する
だけであるから作業は極めて簡単である。According to the present invention, the work is extremely simple since it is only necessary to apply the adhesion suppressing substance to at least either the surface of the pipe connection part or the surface of the adhesive layer on the inner surface of the anticorrosive cover.
第１図は本発明の防食工法による管接続部の一実施例の
部分断面図、第２図は本発明の防食工法において用いら
れる防食カバーの例を示す斜視図、第３図は本発明の防
食工法に於ける防食カバーを被覆する前の管接続部の斜
視図である。
ａ：管接続部、４：粘着抑制物質の塗布部分、５：防食
カバー、５１：防食カバー本体、６：粘着剤層。FIG. 1 is a partial cross-sectional view of an embodiment of a pipe connection using the anti-corrosion method of the present invention, FIG. 2 is a perspective view showing an example of the anti-corrosion cover used in the anti-corrosion method of the present invention, and FIG. It is a perspective view of the pipe connection part before being coated with the anti-corrosion cover in the anti-corrosion construction method. a: Pipe connection part, 4: Application part of adhesion suppressing substance, 5: Anticorrosion cover, 51: Anticorrosion cover main body, 6: Adhesive layer.
Claims (1)
に被覆する管接続部の防食工法において、防食カバーの
粘着剤層面又は管接続部の表面の少なくとも何れか一方
に粘着抑制物質を塗布して防食カバーを管接続部に被覆
することを特徴とする管接続部の防食工法。1. In the corrosion prevention method for pipe connections in which the pipe connections are coated with a corrosion protection cover with an adhesive layer formed on the inner surface, an adhesion suppressing substance is applied to at least either the adhesive layer surface of the corrosion protection cover or the surface of the pipe connections. A method for preventing corrosion of pipe connections, characterized by covering the pipe connections with an anti-corrosion cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6151088A JPH07107440B2 (en) | 1988-03-14 | 1988-03-14 | Anticorrosion method for pipe connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6151088A JPH07107440B2 (en) | 1988-03-14 | 1988-03-14 | Anticorrosion method for pipe connection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01234693A true JPH01234693A (en) | 1989-09-19 |
| JPH07107440B2 JPH07107440B2 (en) | 1995-11-15 |
Family
ID=13173157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6151088A Expired - Lifetime JPH07107440B2 (en) | 1988-03-14 | 1988-03-14 | Anticorrosion method for pipe connection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07107440B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100476650B1 (en) * | 2001-12-04 | 2005-03-17 | 주식회사 화인종합건축사사무소 | Manufacturing method for corrugated steel pipe with multi-coated layer and flange and the product thereof |
| WO2011036513A1 (en) * | 2009-09-28 | 2011-03-31 | Skarboevig Nils Mittet | A pipe coupling cover |
| CN109322893A (en) * | 2018-12-12 | 2019-02-12 | 保定华铁电气化供电器材设备有限公司 | A kind of bolt anti-corrosion protective device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913134A (en) * | 2015-06-25 | 2015-09-16 | 国投钦州发电有限公司 | Flange protective cover |
-
1988
- 1988-03-14 JP JP6151088A patent/JPH07107440B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100476650B1 (en) * | 2001-12-04 | 2005-03-17 | 주식회사 화인종합건축사사무소 | Manufacturing method for corrugated steel pipe with multi-coated layer and flange and the product thereof |
| WO2011036513A1 (en) * | 2009-09-28 | 2011-03-31 | Skarboevig Nils Mittet | A pipe coupling cover |
| GB2486143A (en) * | 2009-09-28 | 2012-06-06 | Nils Mittet Skarboevig | A pipe coupling cover |
| GB2486143B (en) * | 2009-09-28 | 2015-07-08 | Nils Mittet Skarbovig | A pipe coupling cover |
| CN109322893A (en) * | 2018-12-12 | 2019-02-12 | 保定华铁电气化供电器材设备有限公司 | A kind of bolt anti-corrosion protective device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07107440B2 (en) | 1995-11-15 |
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