JPH10165889A - Rust preventive coating method of steel pipe - Google Patents
Rust preventive coating method of steel pipeInfo
- Publication number
- JPH10165889A JPH10165889A JP33547196A JP33547196A JPH10165889A JP H10165889 A JPH10165889 A JP H10165889A JP 33547196 A JP33547196 A JP 33547196A JP 33547196 A JP33547196 A JP 33547196A JP H10165889 A JPH10165889 A JP H10165889A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- paint
- rust
- coating method
- water
- 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
Links
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- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、鋼管の防錆塗装
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rust-proof coating method for a steel pipe.
【０００２】[0002]
【従来の技術】鋼管の防錆塗装は、従来油性防錆塗料、
例えばアルキッド系樹脂塗料を鋼管の表面にスプレ−塗
布し、自然乾燥させたり乾燥室で乾燥させる方式か、紫
外線硬化型塗料を鋼管の表面に塗布した後、塗料を紫外
線硬化乾燥させる方式が一般的である。2. Description of the Related Art Rust-preventive paint for steel pipes is conventionally made of oil-based rust-preventive paint,
For example, a method of spray-coating an alkyd-based resin paint on the surface of a steel pipe and allowing it to dry naturally or in a drying chamber, or a method of applying an ultraviolet-curable paint to the surface of a steel pipe and then curing the paint with ultraviolet light is commonly used. It is.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述し
た従来の鋼管の防錆塗装方法には次のような問題点があ
った。However, the above-mentioned conventional rust-proof coating method for steel pipes has the following problems.
【０００４】（１）油性防錆塗料を塗布する方式 １）塗料が乾きにくいので、塗料がたれたり、搬送中に
図３に示すように、塗料３１を塗布した鋼管３２の表面
に、スキッドマ−ク３３やロ−ルマ−ク３４等、塗料塗
布面が鋼管３２の横送りのためのキッドや搬送用ロ−ル
に接触したことによる接触跡が発生する。 ２）油性防錆塗料には有機溶剤が使用されているので、
労働安全衛生法に基づく有機溶剤の取扱い規則や、消防
法を守るために、設備費が高価になる。(1) A method of applying an oil-based rust preventive paint 1) Since the paint is difficult to dry, the paint is dripped, and as shown in FIG. Contact marks such as the marks 33 and the roll mark 34 contact the kid for transporting the steel pipe 32 laterally or the transporting roll. 2) Since organic solvents are used in the oil-based rust preventive paint,
To comply with the rules for handling organic solvents based on the Occupational Safety and Health Law and the Fire Service Law, equipment costs are high.
【０００５】（２）紫外線硬化型塗料を塗布する方式 １）塗料そのものが高価であるとともに、塗装設備も高
価になる。(2) Method of applying UV-curable paint 1) The paint itself is expensive, and the coating equipment is also expensive.
【０００６】また、このような問題を解消するために、
水溶性塗料を塗布する方式を採用しようとしても、乾燥
に時間がかかるという問題点があった。In order to solve such a problem,
Even if an attempt is made to adopt a method of applying a water-soluble paint, there has been a problem that drying takes time.
【０００７】この発明は、従来技術の上述のような問題
点を解消するためになされたものであり、設備費が安価
であるとともに、塗料の乾燥時間も短くてすむ鋼管の防
錆塗装方法を提供することを目的としている。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and there is provided a method for rust-preventing coating of a steel pipe, which requires a low equipment cost and a short drying time of the paint. It is intended to provide.
【０００８】[0008]
【課題を解決するための手段】この発明に係る鋼管の防
錆塗装方法は、次の工程からなる鋼管の防錆塗装方法で
ある。 （１）鋼管の表面に熱湯を注いで、鋼管の表面温度を５
０度Ｃ以上に予熱する工程 （２）予熱された鋼管の表面に残存する水分の大半を、
圧縮空気で吹き飛ばした後に、所定温度に加熱された空
気を吹き付けて乾燥する工程 （３）水分除去後の鋼管の表面に水溶性の防錆塗料を塗
布する工程 （４）水溶性の防錆塗料を塗布された鋼管の表面に、所
定温度に加熱された空気を吹き付けて塗布された塗料を
乾燥させる工程 本発明の鋼管の防錆塗装方法は、水溶性塗料を塗布する
方式を採用しているので、塗料が安価であるとともに、
塗装設備にも費用がかからない。The rust-preventive coating method for a steel pipe according to the present invention is a rust-preventive coating method for a steel pipe comprising the following steps. (1) Pour hot water on the surface of the steel pipe to reduce the surface temperature of the steel pipe to 5
Step of preheating to 0 ° C or more (2) Most of the water remaining on the surface of the preheated steel pipe is
Step of blowing air heated to a predetermined temperature and drying after blowing off with compressed air (3) Step of applying water-soluble rust preventive paint to the surface of steel pipe after removing water (4) Water-soluble rust preventive paint A step of spraying air heated to a predetermined temperature on the surface of the steel pipe to which the is applied, and drying the applied paint. The rust prevention coating method for a steel pipe of the present invention employs a method of applying a water-soluble paint. So the paint is cheap and
There is no cost for painting equipment.
【０００９】また、水溶性塗料を塗布する際に問題とな
る乾燥時間も、塗料塗布前に鋼管表面を予熱するととも
に、塗布後に加熱された空気により乾燥を促進するよう
にしているので、乾燥時間も短くてすむ。In addition, the drying time, which is a problem when applying a water-soluble paint, is such that the steel pipe surface is preheated before the paint is applied, and the drying is promoted by the heated air after the application. Can be shorter.
【００１０】[0010]
【発明の実施の形態】本発明の実施の形態である鋼管の
防錆塗装方法を、図１を用いて説明する。図１（ａ）は
この鋼管の防錆塗装方法を適用する鋼管の正面図、図１
（ｂ）はこの鋼管の防錆塗装方法を適用する鋼管の斜視
図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rust prevention coating method for a steel pipe according to an embodiment of the present invention will be described with reference to FIG. FIG. 1A is a front view of a steel pipe to which the rust-proof coating method of the steel pipe is applied, and FIG.
(B) is a perspective view of the steel pipe to which the rust-proof coating method for the steel pipe is applied.
【００１１】この鋼管の防錆塗装方法は、従来の防錆塗
装方法で塗装した後の鋼管１を搬送する際に、横送り用
のスキッドに接触してスキッドマ−クが発生すると想定
される鋼管１の部分１ａのみを、あらかじめ水溶性塗料
で塗装して、スキッドマ−クが生成されることにともな
って発生する防錆効果の低減をカバ−しようとする場合
に適用するものである。The rust-preventive coating method for a steel pipe is such that when a steel pipe 1 coated with a conventional rust-preventive coating method is transported, the steel pipe 1 is assumed to come into contact with a skid for lateral feed to generate a skid mark. The present invention is applied to a case where only the portion 1a is coated in advance with a water-soluble paint to reduce the rust-preventive effect caused by the formation of a skid mark.
【００１２】この防錆塗装方法においては、鋼管１を駆
動式のタ−ニングロ−ラ−２により、鋼管１の軸芯の回
りに回転させながら、鋼管１のスキッドマ−クが発生す
ると想定される部分（以下、スキッドマ−ク部という）
１ａに熱湯供給用ノズル３から熱湯４を注ぐ。次いで、
圧縮空気ノズル９から圧縮空気１０を吹きつけて、鋼管
１の表面に残留する水分の大半を吹き飛ばした後、乾燥
機５により温風６をスキッドマ−ク部１ａに吹き付け、
鋼管１の表面に残留する水分を完全に除去する。その
後、塗装スプレ−７により水溶性塗料８をスプレ−し
て、スキッドマ−ク部１ａを塗装する。そして、塗装後
のスキッドマ−ク部１ａに前記乾燥機５により温風６を
吹き付けて、塗料を乾燥させる。In this rust-proof coating method, it is assumed that a skid mark of the steel pipe 1 is generated while the steel pipe 1 is rotated around the axis of the steel pipe 1 by a driving type turning roller-2. Part (hereinafter referred to as skid mark part)
Hot water 4 is poured from the hot water supply nozzle 3 into 1a. Then
After blowing the compressed water 10 from the compressed air nozzle 9 to blow off most of the moisture remaining on the surface of the steel pipe 1, the dryer 5 blows hot air 6 to the skid mark section 1a.
Moisture remaining on the surface of the steel pipe 1 is completely removed. Thereafter, the water-soluble paint 8 is sprayed by a coating spray 7 to coat the skid mark portion 1a. Then, the hot air 6 is blown by the dryer 5 onto the skid mark portion 1a after the coating, thereby drying the paint.
【００１３】この防錆塗装方法においては、上述のよう
にして水溶性塗料を鋼管の表面に塗装するので、安価に
且つ短時間で防錆塗装を施すことができる。In this rust-proof coating method, the water-soluble paint is applied to the surface of the steel pipe as described above, so that the rust-proof coating can be applied inexpensively and in a short time.
【００１４】上述した防錆塗装方法においては、部分的
に防錆塗装する場合について説明したが、短期的な防錆
効果を期待する場合には、鋼管の全面にわたってこの防
錆塗装方法を適用してもよい。In the above-described rust-proof coating method, the case where rust-proof coating is partially applied has been described. However, when a short-term rust-proof effect is expected, this rust-proof coating method is applied to the entire surface of the steel pipe. You may.
【００１５】[0015]
【実施例】外径２４４．５ｍｍ、肉厚１３．８ｍｍの鋼
管の管端から一定距離離れた部分の長手方向２００ｍｍ
の範囲の表面に、図２に示すような装置を使用し、鋼管
１１を駆動式のタ−ニングロ−ラ−１２により、鋼管１
１の軸芯の回りに２．５秒に１回転の割合（周速３０７
ｍｍ／秒）で回転させながら、本発明の防錆塗装方法を
適用した塗装を行った。その塗装手順は次のとおりであ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS A steel pipe having an outer diameter of 244.5 mm and a wall thickness of 13.8 mm has a length of 200 mm in a longitudinal direction at a distance from a pipe end.
The steel pipe 11 is driven by a turning roller 12 using a device as shown in FIG.
One rotation per 2.5 seconds around one axis (peripheral speed 307)
(mm / sec), the coating was performed using the rust-proof coating method of the present invention. The coating procedure is as follows.
【００１６】（１）鋼管１１の塗装部分（スキッドマ−
ク部を想定）１１ａ２００ｍｍをカバ−する長手方向３
００ｍｍの範囲を、熱湯供給配管１３から７５〜８５℃
の熱湯１４を１２リットル／分の割合で供給し、鋼管１
１の塗装部分１１ａの外周面温度を３０℃から５０℃に
上昇させた。この間の正味所要時間は１２．５秒であ
る。(1) Painted portion of the steel pipe 11 (skid mat)
3) Longitudinal direction 3 covering 200 mm 11a
The range of 00 mm is set to 75 to 85 ° C. from the hot water supply pipe 13.
Hot water 14 is supplied at a rate of 12 liters / min.
The temperature of the outer peripheral surface of the first painted portion 11a was increased from 30 ° C. to 50 ° C. The net required time during this time is 12.5 seconds.
【００１７】（２）次いで、鋼管１１が２回転する間、
圧縮空気供給配管１５から圧縮空気（圧力３ｋｇ／ｃｍ
2 ）１６を、鋼管１１の塗装部分１１ａの外周面に吹き
付けて、表面に残留する水分を吹き飛ばした。この間の
正味所要時間は５秒である。(2) Next, while the steel pipe 11 makes two rotations,
Compressed air (pressure 3 kg / cm) from compressed air supply pipe 15
2 ) 16 was sprayed on the outer peripheral surface of the painted portion 11a of the steel pipe 11 to blow off moisture remaining on the surface. The net required time during this time is 5 seconds.
【００１８】（３）次いで、鋼管１１が５回転する間、
温風ブロア−１７から７０℃の温風１８を鋼管１１の塗
装部分１１ａの外周面に吹き付けて、完全乾燥させた。
この温風ブロア−１７は、１７ｍ3 ／分の割合で冷風を
供給するファン１９と、この冷風を加熱するための２０
ｋＷのヒ−タ−２０を装備している。この間の正味所要
時間は１２．５秒である。(3) Next, while the steel pipe 11 rotates five times,
A hot air 18 of 70 ° C. was blown from a hot air blower 17 to the outer peripheral surface of the painted portion 11 a of the steel pipe 11 to be completely dried.
The hot air blower 17 has a fan 19 for supplying cold air at a rate of 17 m 3 / min and a fan 20 for heating the cold air.
It is equipped with a kW heater 20. The net required time during this time is 12.5 seconds.
【００１９】（４）次いで、塗料タンク２１に貯蔵した
ペンキ７５％、水２５％の割合で薄めた水溶性ペンキ２
２を、４ｋＷの塗料ヒ−タ−２３で５０℃度となるよう
に加熱し、塗膜の厚さが７５〜１００μｍとなるよう
に、塗料スプレ−２４で塗布した。この間の正味所要時
間は７．５秒（３回転）である。(4) Next, the water-soluble paint 2 stored in the paint tank 21 and diluted with 75% of water and 25% of water.
2 was heated with a paint heater 23 of 4 kW to 50 ° C., and applied with a paint spray 24 so that the thickness of the coating film became 75 to 100 μm. The net required time during this time is 7.5 seconds (3 rotations).
【００２０】（５）再び、温風ブロア−１７から７０℃
の温風１８を鋼管１１の塗装部分１１ａの外周面に吹き
付けて、塗料を完全乾燥させた。この間の正味所要時間
は４０秒である。(5) Again, warm air blower-17 to 70 ° C.
Of hot air 18 was sprayed on the outer peripheral surface of the painted portion 11a of the steel pipe 11 to completely dry the paint. The net required time during this time is 40 seconds.
【００２１】この防錆塗装にかかった所要時間は、上記
正味所要時間の合計７７．５秒に各工程間の時間間隔
（機器の動作時間、待ち時間）１０秒を加えた８７．５
秒であった。したがって、従来の水溶性塗料を使用した
塗装において、塗料が完全に乾燥するまでの所要時間が
２０分程度であったのと比較すると、所要時間が１／１
０以下に短縮されており、本発明の防錆塗装方法によ
り、水溶性塗料を使用した塗装において、乾燥までの時
間が短縮できるという効果が発揮されていることが分か
る。The time required for the rust-preventive coating is 87.5 obtained by adding a time interval (operating time of equipment, waiting time) of 10 seconds to each of the steps to the total required net time of 77.5 seconds.
Seconds. Therefore, in the case of using the conventional water-soluble paint, the time required for the paint to completely dry is about 20 minutes, which is 1/1 times the time required for the paint to completely dry.
The value is reduced to 0 or less, which indicates that the rust-preventive coating method of the present invention has an effect of shortening the time until drying in coating using a water-soluble paint.
【００２２】[0022]
【発明の効果】この発明により、鋼管の防錆塗装を設備
費に費用をかけることなく、かつ塗料の乾燥時間も短く
てすむように行うことができる。According to the present invention, rust-preventive coating of steel pipes can be carried out without increasing the cost of equipment and the time required for drying the paint is reduced.
【図１】本発明の実施の形態の鋼管の防錆塗装方法の説
明図であり、（ａ）はこの鋼管の防錆塗装方法を適用す
る鋼管の正面図、（ｂ）はこの鋼管の防錆塗装方法を適
用する鋼管の斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a rust-proof coating method for a steel pipe according to an embodiment of the present invention, wherein (a) is a front view of a steel pipe to which the rust-proof coating method is applied, and (b) is a rust-proof coating method for the steel pipe. It is a perspective view of a steel pipe to which a rust painting method is applied.
【図２】本発明の実施例の鋼管の防錆塗装方法の説明図
である。FIG. 2 is an explanatory diagram of a rust-proof coating method for a steel pipe according to an embodiment of the present invention.
【図３】防錆塗装後の鋼管にスキッドマ−クやロ−ルマ
−クが発生することを示す斜視図である。FIG. 3 is a perspective view showing that a skid mark and a roll mark are generated on the steel pipe after the antirust coating.
１ 鋼管 ２ タ−ニングロ−ラ− ３ 熱湯供給用ノズル ４ 熱湯 ５ 乾燥機 ６ 温風 ７ 塗装スプレ− ８ 水溶性塗料 ９ 圧縮空気ノズル １０ 圧縮空気 １１ 鋼管 １２ タ−ニングロ−ラ− １３ 熱湯供給配管 １４ 熱湯 １５ 圧縮空気供給配管 １６ 冷風 １７ 温風ブロア− １８ 温風 １９ ファン ２０ ヒ−タ− ２１ 塗料タンク ２２ 水溶性ペンキ ２３ 塗料ヒ−タ− ２４ 塗料スプレ− DESCRIPTION OF SYMBOLS 1 Steel pipe 2 Turning roller 3 Hot water supply nozzle 4 Hot water 5 Dryer 6 Hot air 7 Painting spray 8 Water-soluble paint 9 Compressed air nozzle 10 Compressed air 11 Steel pipe 12 Turning roller 13 Hot water supply pipe 14 Hot water 15 Compressed air supply pipe 16 Cold air 17 Hot air blower 18 Hot air 19 Fan 20 Heater 21 Paint tank 22 Water-soluble paint 23 Paint heater 24 Paint spray
Claims (1)
の防錆塗装方法。 （１）鋼管の表面に熱湯を注いで、鋼管の表面温度を５
０度Ｃ以上に予熱する工程 （２）予熱された鋼管の表面に残存する水分の大半を、
圧縮空気で吹き飛ばした後に、所定温度に加熱された空
気を吹き付けて乾燥する工程 （３）水分除去後の鋼管の表面に水溶性の防錆塗料を塗
布する工程 （４）水溶性の防錆塗料を塗布された鋼管の表面に、所
定温度に加熱された空気を吹き付けて塗布された塗料を
乾燥させる工程1. A rust-proof coating method for a steel pipe, comprising the following steps. (1) Pour hot water on the surface of the steel pipe to reduce the surface temperature of the steel pipe to 5
Step of preheating to 0 ° C or more (2) Most of the water remaining on the surface of the preheated steel pipe is
Step of blowing air heated to a predetermined temperature and drying after blowing off with compressed air (3) Step of applying water-soluble rust preventive paint to the surface of steel pipe after removing water (4) Water-soluble rust preventive paint Drying the applied paint by spraying air heated to a predetermined temperature on the surface of the steel pipe on which is applied
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33547196A JPH10165889A (en) | 1996-12-16 | 1996-12-16 | Rust preventive coating method of steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33547196A JPH10165889A (en) | 1996-12-16 | 1996-12-16 | Rust preventive coating method of steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10165889A true JPH10165889A (en) | 1998-06-23 |
Family
ID=18288940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33547196A Pending JPH10165889A (en) | 1996-12-16 | 1996-12-16 | Rust preventive coating method of steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10165889A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100474300B1 (en) * | 2002-06-24 | 2005-03-08 | 주식회사 하이스틸 | Drying structure of painting device for a tetragonal pipe |
| CN104624457A (en) * | 2015-01-22 | 2015-05-20 | 马鞍山纽泽科技服务有限公司 | Steel surface rustproof treatment method |
-
1996
- 1996-12-16 JP JP33547196A patent/JPH10165889A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100474300B1 (en) * | 2002-06-24 | 2005-03-08 | 주식회사 하이스틸 | Drying structure of painting device for a tetragonal pipe |
| CN104624457A (en) * | 2015-01-22 | 2015-05-20 | 马鞍山纽泽科技服务有限公司 | Steel surface rustproof treatment method |
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