CN202598026U - Three-layer composite asphalt anti-corrosion pipe - Google Patents
Three-layer composite asphalt anti-corrosion pipe Download PDFInfo
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- CN202598026U CN202598026U CN 201220163244 CN201220163244U CN202598026U CN 202598026 U CN202598026 U CN 202598026U CN 201220163244 CN201220163244 CN 201220163244 CN 201220163244 U CN201220163244 U CN 201220163244U CN 202598026 U CN202598026 U CN 202598026U
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- pipe
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Abstract
The utility model relates to a three-layer composite asphalt anti-corrosion pipe which mainly solves the problems that a coating of a petroleum asphalt anti-corrosion layer in the prior art is low in mechanical strength and poor in heat stability, and can not bear stabbing of plant roots. The three-layer composite asphalt anti-corrosion pipe is characterized in that an inner wall of a steel tube (1) is coated with an epoxy anti-corrosion layer (2), an outer wall of the steel tube (1) is sequentially coated with an undercoat layer (3) and an asphalt anti-corrosion layer (4), and a polyolefin protective layer (5) is wound on an outer surface of the asphalt anti-corrosion layer (4). Due to the facts that the epoxy anti-corrosion layer is coated on the inner wall of the steel tube, and the polyolefin protective layer and the asphalt anti-corrosion layer are wound on the outer wall at high-temperature, the three-layer composite asphalt anti-corrosion pipe has the advantages of being good in heat stability, and improving protection performance of products and prolonging service life of the steel tube.
Description
Technical field
The utility model relates to the used a kind of pipeline in field, oil field, particularly a kind of three layers of composite asphalt anti-corrosion pipe.
Background technique
Buried pipeline is adopted in the transmission of oilfield usually, and buried pipeline is one of critical facility of ground surface works, is the tie that connects upstream resource and downstream user.Because it is underground that pipeline is embedded in for a long time, As time goes on, the influence of factors such as extraneous soil characteristics and landform sedimentation, the burn into perforation can take place, leak in pipeline, brings serious loss to the oil field.The economic loss that constructed, oil-gas pipeline corrosion causes can be divided into direct loss and indirect loss.Direct loss comprise: more exchange device and member expense, repair expenses and anticorrosion expense etc.; Indirect loss comprises: the loss that stops production, corrosion leakage cause loss, corrosion products accumulation or the damaged loss that causes of corrosion of product, and indirect loss is big far beyond direct loss, and is difficult to estimate.Corrosive pipeline is except the serious economic loss that causes, and it also can cause the leakage of harmful matter, environment is polluted, even also can cause the disaster accident of burst, jeopardizes personal safety.For the long distance pipeline and the collection transmission pipe network of transport gas, the employing of technology for external corrosion-proofing of pipeline and construction quality are directly connected to the safe operation and the working life of pipeline.The area is with a varied topography because pipeline passes through, soil property varies, and buried steel pipeline need be taked different outer anti-corrosion measures.The coating of traditional asphalt coating has that mechanical strength is low, the root thorn of anti-plant the, poor heat stability and polyolefin directly do not contact the shortcoming of adhesion difference with tubing.
Summary of the invention
The utility model technical problem to be solved is to overcome low, the problem of the root thorn of anti-plant the, poor heat stability not of the coating machine intensity of the existing asphalt coating that exists in the background technique; And a kind of three layers of composite asphalt anti-corrosion pipe are provided; These three layers of composite asphalt anti-corrosion pipe are twined polyolefin, pitch protective layer at steel pipe internal diameter application liquid anticorrosive paint or powder anti-corrosion coating external diameter high temperature; Good thermal stability improves the product barrier propterty, prolongs steel pipe working life.
The utility model solves its problem and can reach through following technological scheme: these three layers of composite asphalt anti-corrosion pipe comprise steel pipe; Described steel pipe inwall scribbles the epoxy anticorrosion layer; Outer wall of steel pipe scribbles prime coat, pitch anticorrosive coat successively, and pitch anticorrosive coat outer surface twines the polyolefin protective coating.
The utility model and above-mentioned background compared with techniques can have following beneficial effect: these three layers of composite asphalt anti-corrosion pipe are owing to adopt said structure, and steel pipe viscosity is strong and can realize fusion certainly, waterproof, impervious, good airproof performance; And electrical insulating property is high, ageing-resistant excellent in stability, and the ultra-violet radiation resisting ability is strong.Smooth interior is reduced friction, and drainage rate is fast.Can resist soil stress rupture ability, anti-impact force is strong, and operating efficiency is high.Having saved material greatly, reduced cost, made things convenient for construction, is a kind of pollution-free, environmental friendly, anti-corrosive handicraft product of not having harm.
Description of drawings:
Accompanying drawing 1 is the structural representation of the utility model.
Among the figure: 1-steel pipe, 2-epoxy anticorrosion layer, 3-prime coat, 4-pitch anticorrosive coat, 5-polyolefin protective coating.
Embodiment:
To be described further the utility model below in conjunction with accompanying drawing:
As shown in Figure 1, these three layers of composite asphalt anti-corrosion pipe comprise steel pipe 1, and described steel pipe 1 inwall scribbles epoxy anticorrosion layer 2, and outer wall scribbles prime coat 3, pitch anticorrosive coat 4 successively, and pitch anticorrosive coat 4 outer surfaces twine polyolefin protective coating 5.Described pitch anticorrosive coat 4 is added with glass fabric layer on the petroleum tar.
Steel pipe at first carries out pretreatment to the surface before flow coat.Surface preparation can be used chemical method, sintering process; Sandblast can be adopted general silica sand, also can use grit blasting, shot or dried vapour blasting, and curing can be adopted hot blast stove; Oven (electric heating) or other mode of heating; The preparation of steel pipe inwall liquid epoxy coating, coating process can adopt pressurized air, airless spraying, electrostatic spraying, and powder adopts the electrostatic spraying mode; Solidify and adopt the mode of aforesaid several kinds of preheatings in scheduled time, temperature, to solidify, detection can adopt the thickness meter of specialty to detect.Outer wall adopts the beveling machine groove to form V-arrangement, 30 °-35 ° of groove angles, and root face should be less than 1.0mm; Tube surfaces is removed surface attachments through shot blasting method, should reach the rust cleaning standard, should be the Sa2.5 level; Tube surfaces anticorrosive coating, anticorrosive coat thickness require according to product standard or user's needs regulation, are coated with priming under the normal temperature and should surpass 24h around being coated with the petroleum tar time lag; Behind the flow coat petroleum tar, should twine glass cloth immediately, glass cloth must be dry, tight corrugationless when cleaning is twined; Flanging should be even, and the flanging width should be 20-30mm, and glass cloth joint lap length is 100-150mm; The petroleum tar rate of soaking into of glass cloth should reach more than 95%, forbids to occur the blank greater than 50 х 50mm.Before boiling pitch, pitch is broken into the material footpath is the bulk of 100-200mm, and remove paper scrap; Earth and other foreign material boil and adopt the indirect molten asphalt method of asphalt heat conducting oil, should slowly heat when boiling beginning; Boil temperature and be controlled at a left side, 230 ℃ of left sides, maximum temperature must not surpass 250 ℃, should often stir in boiling; And the floater of removing pitch table cloth, the time of boiling is controlled at 4-5h, guarantees that dehydration is fully.Selected extruder one-process extruded polyolefin protective layer, 201 ~ 230 ℃ of extruder barrel temperature, the polyolefin protective layer is answered the uniform winding body, and the holder of external protection bag answers degree of tightness suitable; There is not breakage, corrugationless, shelling; Flanging should be even, and the flanging width should be 20-30mm, and lap length should be 100-150mm; Tap water circulation cooling, the length that pipe end is reserved section should be 150-200mm, and steel pipe two ends anticorrosive coat should be made slow sloping type joint.The utility model can be widely used in plumbing and the oil gas in oil, rock gas, chemical industry, the urban construction, the outer anticorrosion and reinstatement works that coal gas is carried steel pipe and the buried storage tank body of steel.It is a kind of up-to-date pollution-free, environmental friendly, anti-corrosive handicraft product of not having harm.
Claims (2)
1. three layers of composite asphalt anti-corrosion pipe; Comprise steel pipe (1); It is characterized in that: described steel pipe (1) inwall scribbles epoxy anticorrosion layer (2); Steel pipe (1) outer wall scribbles prime coat (3), pitch anticorrosive coat (4) successively, and pitch anticorrosive coat (4) outer surface twines polyolefin protective coating (5).
2. a kind of three layers of composite asphalt anti-corrosion pipe according to claim 1 is characterized in that: described pitch anticorrosive coat (4) is added with glass fabric layer on the petroleum tar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220163244 CN202598026U (en) | 2012-04-17 | 2012-04-17 | Three-layer composite asphalt anti-corrosion pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220163244 CN202598026U (en) | 2012-04-17 | 2012-04-17 | Three-layer composite asphalt anti-corrosion pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202598026U true CN202598026U (en) | 2012-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220163244 Expired - Fee Related CN202598026U (en) | 2012-04-17 | 2012-04-17 | Three-layer composite asphalt anti-corrosion pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202598026U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333240A (en) * | 2015-11-11 | 2016-02-17 | 肖练 | Prefabricated oil and gas pipeline having excellent weather resistance |
-
2012
- 2012-04-17 CN CN 201220163244 patent/CN202598026U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333240A (en) * | 2015-11-11 | 2016-02-17 | 肖练 | Prefabricated oil and gas pipeline having excellent weather resistance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20210417 |
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| CF01 | Termination of patent right due to non-payment of annual fee |