CN102240630A - Process for coating small-diameter 3-polyurethane (PE) antiseptic steel tube - Google Patents
Process for coating small-diameter 3-polyurethane (PE) antiseptic steel tube Download PDFInfo
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- CN102240630A CN102240630A CN2011101165493A CN201110116549A CN102240630A CN 102240630 A CN102240630 A CN 102240630A CN 2011101165493 A CN2011101165493 A CN 2011101165493A CN 201110116549 A CN201110116549 A CN 201110116549A CN 102240630 A CN102240630 A CN 102240630A
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Abstract
The invention relates to a process for coating a small-diameter 3-polyurethane (PE) antiseptic steel tube, and the method comprises the following steps of: (1) surface treatment; (2) medium frequency heating; (3) epoxy powder spraying; (4) adhesive and polythene coating; and (5) water cooling. In the invention, an adhesive and polythene extrusion coating process is adopted to manufacture an antiseptic layer, antiseptic coating on a small-diameter steel tube is realized, the process has the advantages of simplicity, good coating effect and high efficiency, and the antiseptic layer is uniform in thickness and has higher tensile strength, peel strength, impact strength and bending resistance and can meet market demand.
Description
Technical field
The invention belongs to the anti-corrosive steel tube field, particularly a kind of tubule footpath 3PE anti-corrosive steel tube coating process.
Background technology
Anti-corrosive steel tube is widely used in pipeline engineering fields such as China's oil, chemical industry, natural gas, heating power, sewage disposal, water source, bridge, steel constructions.The 3PE anti-corrosive steel tube is at the anti-corrosive steel tube that refers to coat in steel tube surface epoxy powder, adhesive and polyethylene three-decker, by in conjunction with three's premium properties, effectively improve resistance to chemical attack, anti-cathodic disbonding, anti-mechanical damage performance, range of application is very extensive.At present, the production method of 3PE anti-corrosive steel tube is: at steel tube surface electrostatic spraying epoxy powder, side direction is twined adhesive, and side direction is twined polyethylene anticorrosive coating.In the winding process of adhesive and polyethylene anticorrosive coating, steel pipe adopts conveying device to push ahead.Existing wound form production method is applicable to the steel pipe application of caliber more than 500mm, but is unsuitable for the application of tubule footpath steel pipe.Trace it to its cause for: big caliber steel pipe own wt is big, and in rotary course of conveying, body is advanced steadily, and adhesive and polyethylene anticorrosive coating can steady rate steadily twine.But, for the steel pipe of caliber, because it has the advantages that length is big, diameter is little less than 500mm, in course of conveying, body very easily produces radial wobble, causes adhesive, polyethylene anticorrosive coating elasticity in the side direction winding process inconsistent, reduces the performance of the corrosion-inhibiting coating of steel pipe.Therefore, demand researching and developing a kind of coating process that is applicable to tubule footpath 3PE anti-corrosive steel tube urgently.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of tubule footpath 3PE anti-corrosive steel tube coating process that satisfies tubule footpath steel pipe corrosion-proof demand is provided, have the advantage that technology is simple, painting effect good, efficient is high.
The present invention solves its technical problem and takes following technical scheme to realize:
A kind of tubule footpath 3PE anti-corrosive steel tube coating process, it is characterized in that: the step of this coating process is:
(1). surface treatment: adopt compressed air shotblasting machine that steel tube surface is carried out processing of rust removing;
(2). heating in medium frequency: adopt frequency heating device that steel pipe is heated, the steel tube surface temperature reaches 185 ± 15 ℃;
(3). epoxy powder spraying: adopt a plurality of spray guns that steel tube surface is carried out the epoxy powder electrostatic spraying;
(4). adhesive and polyethylene coat: adopt adhesive extruder and PE extruder that steel tube surface is coated adhesive and polyethylene simultaneously, form the 3PE anticorrosive coat in steel tube surface;
(5). water-cooled: adopt spray equipment that steel pipe is carried out the cold water spray, steel pipe sharply is cooled to below 60 ℃, make the anticorrosive coat typing.
And the electrostatic potential of described step (3) epoxy powder spraying is greater than 80kv, and fluidisation air pressure is 0.5 ± 0.15Mpa.
And the adhesive extruder during described step (4) adhesive and polyethylene coat and the die orifice coaxial package of PE extruder are in the steel pipe outside.
Advantage of the present invention and good effect are:
This tubule footpath 3PE anti-corrosive steel tube coating process adopts adhesive and polyethylene to extrude cladding process and makes anticorrosive coat, realized the anticorrosive coating of tubule footpath steel pipe, has the outstanding advantage that technology is simple, painting effect good, efficient is high, anticorrosive coat thickness is even, have higher draw tensile strength, peel strength, impact strength and bending resistance, meet the need of market.
The specific embodiment
The invention will be further described below in conjunction with specific embodiment.Following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A kind of tubule footpath 3PE anti-corrosive steel tube coating process, it is characterized in that: the step of this coating process is:
(1). surface treatment: adopt compressed air shotblasting machine that steel tube surface is carried out processing of rust removing, the steel tube surface temperature should be higher than dew point more than 3 ℃, otherwise answers preheating to eliminate moisture.
(2). heating in medium frequency: adopt frequency heating device that steel pipe is heated, the steel tube surface temperature reaches 185 ± 15 ℃, and voltage of intermediate frequency is 300kv, and IF-FRE is 970, and intermediate frequency power is 40 ± 10kw, and commutating voltage is 250 ± 10v, and rectified current is 180A.
(3). epoxy powder spraying: adopt six spray gun carried out the epoxy powder electrostatic spraying to steel tube surface, electrostatic potential is greater than 80kv, and fluidisation air pressure is 0.5 ± 0.15Mpa, and temperature is 150 ± 10 ℃ behind the pipe coating.
(4). adhesive and polyethylene coat: adopt adhesive extruder and PE extruder that steel tube surface is coated adhesive and polyethylene simultaneously, form the 3PE anticorrosive coat in steel tube surface; The adhesive extruder during adhesive and polyethylene coat and the die orifice coaxial package of PE extruder are in the steel pipe outside.
(5). water-cooled: adopt spray equipment that steel pipe is carried out the cold water spray, steel pipe sharply is cooled to below 60 ℃, make the anticorrosive coat typing.
Steel pipe passes through compressed air shotblasting machine, frequency heating device, cabinet for electrostatic painting, adhesive extruder die orifice and PE extruder die orifice successively under the drive of horizontal feed device, finish the application of 3PE anticorrosive coat.
[0023] although discloses embodiments of the invention for the purpose of illustration, but it will be appreciated by those skilled in the art that: in the spirit and scope that do not break away from the present invention and claims, various replacements, variation and modification all are possible, therefore, scope of the present invention is not limited to the disclosed content of embodiment.
Claims (3)
1. tubule footpath 3PE anti-corrosive steel tube coating process, it is characterized in that: the step of this coating process is:
(1). surface treatment: adopt compressed air shotblasting machine that steel tube surface is carried out processing of rust removing;
(2). heating in medium frequency: adopt frequency heating device that steel pipe is heated, the steel tube surface temperature reaches 185 ± 15 ℃;
(3). epoxy powder spraying: adopt a plurality of spray guns that steel tube surface is carried out the epoxy powder electrostatic spraying;
(4). adhesive and polyethylene coat: adopt adhesive extruder and PE extruder that steel tube surface is coated adhesive and polyethylene simultaneously, form the 3PE anticorrosive coat in steel tube surface;
(5). water-cooled: adopt spray equipment that steel pipe is carried out the cold water spray, steel pipe sharply is cooled to below 60 ℃, make the anticorrosive coat typing.
2. tubule according to claim 1 footpath 3PE anti-corrosive steel tube coating process, it is characterized in that: the electrostatic potential of described step (3) epoxy powder spraying is greater than 80kv, and fluidisation air pressure is 0.5 ± 0.15Mpa.
3. tubule according to claim 1 footpath 3PE anti-corrosive steel tube coating process, it is characterized in that: the adhesive extruder during described step (4) adhesive and polyethylene coat and the die orifice coaxial package of PE extruder are in the steel pipe outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101165493A CN102240630A (en) | 2011-05-06 | 2011-05-06 | Process for coating small-diameter 3-polyurethane (PE) antiseptic steel tube |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101165493A CN102240630A (en) | 2011-05-06 | 2011-05-06 | Process for coating small-diameter 3-polyurethane (PE) antiseptic steel tube |
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| CN102240630A true CN102240630A (en) | 2011-11-16 |
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| CN2011101165493A Pending CN102240630A (en) | 2011-05-06 | 2011-05-06 | Process for coating small-diameter 3-polyurethane (PE) antiseptic steel tube |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102125916A (en) * | 2010-11-24 | 2011-07-20 | 番禺珠江钢管有限公司 | Process for removing anti-corrosive coating from steel pipe end |
| CN103016906A (en) * | 2012-12-25 | 2013-04-03 | 宝鸡石油钢管有限责任公司 | Outer surface 3PE anti-corrosion production line for continuous pipe and anti-corrosion process |
| CN103016851A (en) * | 2012-12-06 | 2013-04-03 | 同济大学 | Smart pipeline with optical fiber sensing function and manufacturing method for smart pipeline |
| CN103465600A (en) * | 2013-09-12 | 2013-12-25 | 鞍山海得隆防腐工程有限公司 | Side enwinding and coating method of small-pipe-diameter three-layer PE (poly ethylene) anticorrosion tube as well as auxiliary device |
| CN105114708A (en) * | 2015-07-31 | 2015-12-02 | 四川科迪燃气管道防腐有限公司 | Processing method of corrosion-resistant uvioresistant exposed steel gas pipeline |
| CN105155656A (en) * | 2015-09-23 | 2015-12-16 | 苏州市玄天环保科技有限公司 | Kinetic energy recovery drain pipe |
| CN106678498A (en) * | 2016-07-26 | 2017-05-17 | 潍坊中石科技有限公司 | Manufacturing technique of wrapping cross-linking corrosion-resistant layer of metal pipeline |
| CN109590180A (en) * | 2018-12-03 | 2019-04-09 | 中国石油天然气集团有限公司 | A kind of spraying process of the full powdered coating of steel pipe 3PE |
| CN111036527A (en) * | 2019-12-18 | 2020-04-21 | 海城国丰管业有限公司 | Metal pipe fitting anticorrosion treatment method |
| CN113843121A (en) * | 2020-06-28 | 2021-12-28 | 宝山钢铁股份有限公司 | Variable frequency induction heating device and method for externally coated steel pipe |
Citations (2)
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| CN2860815Y (en) * | 2005-12-31 | 2007-01-24 | 天华化工机械及自动化研究设计院 | Steel pipe anticorrosive dual-layer composite type extrusion wrapping machine head |
| CN101655179A (en) * | 2008-11-04 | 2010-02-24 | 廖宇平 | Novel coating process of pipe anti-corrosion layer with three-layer structure |
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2011
- 2011-05-06 CN CN2011101165493A patent/CN102240630A/en active Pending
Patent Citations (2)
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| CN2860815Y (en) * | 2005-12-31 | 2007-01-24 | 天华化工机械及自动化研究设计院 | Steel pipe anticorrosive dual-layer composite type extrusion wrapping machine head |
| CN101655179A (en) * | 2008-11-04 | 2010-02-24 | 廖宇平 | Novel coating process of pipe anti-corrosion layer with three-layer structure |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102125916A (en) * | 2010-11-24 | 2011-07-20 | 番禺珠江钢管有限公司 | Process for removing anti-corrosive coating from steel pipe end |
| CN103016851A (en) * | 2012-12-06 | 2013-04-03 | 同济大学 | Smart pipeline with optical fiber sensing function and manufacturing method for smart pipeline |
| CN103016906A (en) * | 2012-12-25 | 2013-04-03 | 宝鸡石油钢管有限责任公司 | Outer surface 3PE anti-corrosion production line for continuous pipe and anti-corrosion process |
| CN103465600A (en) * | 2013-09-12 | 2013-12-25 | 鞍山海得隆防腐工程有限公司 | Side enwinding and coating method of small-pipe-diameter three-layer PE (poly ethylene) anticorrosion tube as well as auxiliary device |
| CN105114708A (en) * | 2015-07-31 | 2015-12-02 | 四川科迪燃气管道防腐有限公司 | Processing method of corrosion-resistant uvioresistant exposed steel gas pipeline |
| CN105114708B (en) * | 2015-07-31 | 2017-11-07 | 四川科迪燃气管道防腐有限公司 | The processing method of anti-corrosion uvioresistant airbreak steel gas pipeline |
| CN105155656A (en) * | 2015-09-23 | 2015-12-16 | 苏州市玄天环保科技有限公司 | Kinetic energy recovery drain pipe |
| CN106678498A (en) * | 2016-07-26 | 2017-05-17 | 潍坊中石科技有限公司 | Manufacturing technique of wrapping cross-linking corrosion-resistant layer of metal pipeline |
| CN109590180A (en) * | 2018-12-03 | 2019-04-09 | 中国石油天然气集团有限公司 | A kind of spraying process of the full powdered coating of steel pipe 3PE |
| CN111036527A (en) * | 2019-12-18 | 2020-04-21 | 海城国丰管业有限公司 | Metal pipe fitting anticorrosion treatment method |
| CN113843121A (en) * | 2020-06-28 | 2021-12-28 | 宝山钢铁股份有限公司 | Variable frequency induction heating device and method for externally coated steel pipe |
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Application publication date: 20111116 |