CN202521074U - External corrosion-resistant pipeline with double modified asphalt polyolefin layers - Google Patents

External corrosion-resistant pipeline with double modified asphalt polyolefin layers Download PDF

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Publication number
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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China
Prior art keywords
corrosion
resistant
pipeline
polyolefin
modified asphalt
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Active
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CN2012201711331U
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Chinese (zh)
Inventor
周广军
何德江
杨眉
赵清敏
张兴安
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DAQING OILFIELD VENTURE GROUP METAL CORROSION PREVENTION Co Ltd
Daqing Petroleum Administration Bureau
China National Petroleum Corp
Original Assignee
DAQING OILFIELD VENTURE GROUP METAL CORROSION PREVENTION Co Ltd
Daqing Petroleum Administration Bureau
China National Petroleum Corp
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Application filed by DAQING OILFIELD VENTURE GROUP METAL CORROSION PREVENTION Co Ltd, Daqing Petroleum Administration Bureau, China National Petroleum Corp filed Critical DAQING OILFIELD VENTURE GROUP METAL CORROSION PREVENTION Co Ltd
Priority to CN2012201711331U priority Critical patent/CN202521074U/en
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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

The outer anti-corrosion pipeline of double-deck modified pitch polyolefin
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.
CN2012201711331U 2012-04-20 2012-04-20 External corrosion-resistant pipeline with double modified asphalt polyolefin layers Active CN202521074U (en)

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

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Family Applications (1)

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CN (1) CN202521074U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
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
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

Cited By (4)

* Cited by examiner, † Cited by third party
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
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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