CN202521074U - External corrosion-resistant pipeline with double modified asphalt polyolefin layers - Google Patents
External corrosion-resistant pipeline with double modified asphalt polyolefin layers Download PDFInfo
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- CN202521074U CN202521074U CN2012201711331U CN201220171133U CN202521074U CN 202521074 U CN202521074 U CN 202521074U CN 2012201711331 U CN2012201711331 U CN 2012201711331U CN 201220171133 U CN201220171133 U CN 201220171133U CN 202521074 U CN202521074 U CN 202521074U
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- corrosion
- resistant
- pipeline
- modified asphalt
- polyolefin
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Abstract
The utility model relates to an external corrosion-resistant pipeline with double modified asphalt polyolefin layers. The problem that the technology cost of the external corrosion resistance in the existing oilfield in the prior art is solved. The external corrosion-resistant pipeline is characterized in that a modified asphalt corrosion-resistant layer (2) is covered on the surface of the outer wall of a steel pipe (1); and a modified polyolefin protective layer (3) is covered outside the modified asphalt corrosion-resistant layer (2). By utilizing the external corrosion-resistant pipeline with the double modified asphalt polyolefin layers, an epoxy corrosion-resistant layer is coated on the inner wall of a steel pipeline to modify the polyolefin protective layer and a petroleum asphalt corrosion-resistant layer so as to form a modified polyolefin protective layer and a modified asphalt corrosion-resistant layer, so that two structural layers are tightly combined; and therefore, the external corrosion-resistant pipeline has corrosion-resistant and cathodic disbonding resistance performances and is low in cost.
Description
Technical field
The utility model relates to the used a kind of pipeline in field, oil field, the outer anti-corrosion pipeline of particularly a kind of double-deck modified pitch polyolefin.
Background technique
In recent years, for controlling plumbing fixtures is corroded outward, the oil field anti-corrosion pipeline mainly adopts modes such as 3 layers of PE is anticorrosion, 2 layers of PE is anticorrosion, asphalt anti-corrosion.Because material and structural difference; Different anti-corrosion pipelines are in the characteristics that all exist aspect antiseptic property, Economy and the purposes separately: 3 layers of PE anti-corrosion pipe have outstanding antiseptic property and shock resistance; In demanding heavy caliber of oilfield safety property and natural gas line, obtained application to a certain degree; But its cost is very high, is about 1.6 times of asphalt anti-corrosion technology; 2 layers of PE aseptic technic are the higher a kind of aseptic technic forms of cost performance; Price is about 1.2 times of asphalt anti-corrosion technology; In oil field pipe is anticorrosion, use more; Because it does not have the powder coating anticorrosive coat of 3 layers of PE aseptic technic, in case destroying, outer protective layer can cause pipeline that corrosion rapidly takes place; Petroleum tar (or modified pitch) aseptic technic is because price advantage, and rock gas and profit conveyance conduit are used always in the oil field, but owing to its poor water resistance, and areas such as, reed moisture at height, marsh are all inapplicable.
Summary of the invention
The utility model technical problem to be solved is to overcome the high problem of existing oil field anti-corrosion pipeline technology for external corrosion-proofing cost that exists in the background technique; And anti-corrosion pipeline outside a kind of double-deck modified pitch polyolefin is provided; The outer anti-corrosion pipeline of this bilayer modified pitch polyolefin carries out modification formation modification polythene protective coating and modified pitch anticorrosive coat to polyethylene protective coating and asphalt coating; Make between two construction layers and combine closely, have anti-corrosion and the antikathode stripping performance, cost is low.
The utility model solves its problem and can reach through following technological scheme: the outer anti-corrosion pipeline of this bilayer modified pitch polyolefin comprises steel pipe; Described outer wall of steel pipe surface coating modification pitch anticorrosive coat, the outside improved polyalkene protective coating that coats of modified pitch anticorrosive coat.
The utility model and above-mentioned background compared with techniques can have following beneficial effect: the outer anti-corrosion pipeline of this bilayer modified pitch polyolefin is owing to adopt said structure; Use for reference the advantage of petroleum tar and 2 layers of PE aseptic technic; Polyethylene protective coating and asphalt coating are carried out modification formation modification polythene protective coating and modified pitch anticorrosive coat; Make between two construction layers and combine closely; The pliability of raising petroleum tar, impact resistance, splitting resistance reach the adhesion property with pipeline, polyethylene protective coating, improve the cohesive force of outer protective layer and pitch anticorrosive coat, promote composite structure antikathode stripping ability.Removed that traditional asphalt anti-corrosion industrial membrane 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; Converge the advantage of traditional asphalt anti-corrosion pipeline and PE pipeline; Improve the product barrier propterty; Prolong steel pipe working life, formed the outer anti-corrosion pipeline of cover nonpetroleum pitch anti-corrosion and economy that the antikathode stripping performance is good, reduced the technology for external corrosion-proofing cost.
Description of drawings:
Accompanying drawing 1 is the structural representation of the utility model.
Among the figure: 1-steel pipe, 2-modified pitch anticorrosive coat, 3-improved polyalkene protective coating.
Embodiment:
To be described further the utility model below in conjunction with accompanying drawing:
As shown in Figure 1, the outer anti-corrosion pipeline of this bilayer modified pitch polyolefin comprises steel pipe 1, described steel pipe 1 outer wall surface coating modification pitch anticorrosive coat 2, the modified pitch anticorrosive coat 2 outside improved polyalkene protective coatings 3 that coat; The thickness of modified pitch anticorrosive coat is 4～7 mm; The thickness of modified poly ethylene protective coating is 1～4mm.
The steel pipe inside and outside wall is through after thoroughly eliminating rust; Observe tubing and see primary colours; Outer wall adopts extruder to extrude modified pitch anticorrosive coat forming technique and extruder coats polyolefin protective layer one-shaping technique; Modified pitch adds pitch extruder hopper; The high density polyethylene (HDPE) particle mixes with reworked material and adds polyethylene extruder hopper, and two kinds of material are taken up in order of priority and in extruder separately, are extruded the Cladding Steel tube outer surface by the die orifice moulding after the fusion, forms the outer anti-corrosion pipeline of the double-deck modified pitch polyolefin of nonpetroleum pitch polyethylene.The outer anti-corrosion pipeline of this bilayer modified pitch polyolefin has converged the traditional pitch anti-corrosion pipeline and the advantage of polyethylene pipe; Improve the product barrier propterty; Prolong steel pipe working life; Form the outer anti-corrosion pipeline of cover nonpetroleum pitch anti-corrosion and economy that the antikathode stripping performance is good, reduced the technology for external corrosion-proofing cost.
Claims (2)
1. the outer anti-corrosion pipeline of double-deck modified pitch polyolefin comprises steel pipe (1), it is characterized in that: described steel pipe (1) outer wall surface coating modification pitch anticorrosive coat (2), the outside improved polyalkene protective coating (3) that coats of modified pitch anticorrosive coat (2).
2. the outer anti-corrosion pipeline of double-deck modified pitch polyolefin according to claim 1, it is characterized in that: the thickness of described modified pitch anticorrosive coat (2) is 4～7 mm; The thickness of modified poly ethylene protective coating (3) is 1～4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201711331U CN202521074U (en) | 2012-04-20 | 2012-04-20 | External corrosion-resistant pipeline with double modified asphalt polyolefin layers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201711331U CN202521074U (en) | 2012-04-20 | 2012-04-20 | External corrosion-resistant pipeline with double modified asphalt polyolefin layers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202521074U true CN202521074U (en) | 2012-11-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201711331U Expired - Fee Related CN202521074U (en) | 2012-04-20 | 2012-04-20 | External corrosion-resistant pipeline with double modified asphalt polyolefin layers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202521074U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912760A (en) * | 2014-03-09 | 2014-07-09 | 赵景军 | Steel pipe anticorrosive coating processing technology |
| CN104119686A (en) * | 2014-07-01 | 2014-10-29 | 孟鋆辉 | New steel pipeline anti-corrosion process adopting modified asphalt and polyethylene |
| CN106439263A (en) * | 2016-11-21 | 2017-02-22 | 无锡金顶石油管材配件制造有限公司 | Anti-corrosion petroleum pipeline |
| CN107559538A (en) * | 2017-09-29 | 2018-01-09 | 江苏天时新材料科技有限公司 | Double-decker anticorrosive coat |
| CN107763368A (en) * | 2017-10-20 | 2018-03-06 | 四川佳泰防腐绝缘材料有限公司 | A kind of electrochemical anti-corrosive pipeline |
-
2012
- 2012-04-20 CN CN2012201711331U patent/CN202521074U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912760A (en) * | 2014-03-09 | 2014-07-09 | 赵景军 | Steel pipe anticorrosive coating processing technology |
| CN104119686A (en) * | 2014-07-01 | 2014-10-29 | 孟鋆辉 | New steel pipeline anti-corrosion process adopting modified asphalt and polyethylene |
| CN106439263A (en) * | 2016-11-21 | 2017-02-22 | 无锡金顶石油管材配件制造有限公司 | Anti-corrosion petroleum pipeline |
| CN107559538A (en) * | 2017-09-29 | 2018-01-09 | 江苏天时新材料科技有限公司 | Double-decker anticorrosive coat |
| CN107763368A (en) * | 2017-10-20 | 2018-03-06 | 四川佳泰防腐绝缘材料有限公司 | A kind of electrochemical anti-corrosive pipeline |
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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: 20121107 Termination date: 20210420 |
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| CF01 | Termination of patent right due to non-payment of annual fee |