CN203517022U - Low-lying anti-corrosion alloyed corrosion-prevention thermal insulation pipeline - Google Patents
Low-lying anti-corrosion alloyed corrosion-prevention thermal insulation pipeline Download PDFInfo
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- CN203517022U CN203517022U CN201320724871.9U CN201320724871U CN203517022U CN 203517022 U CN203517022 U CN 203517022U CN 201320724871 U CN201320724871 U CN 201320724871U CN 203517022 U CN203517022 U CN 203517022U
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Abstract
The utility model relates to a low-lying anti-corrosion alloyed corrosion-prevention thermal insulation pipeline which is mainly used for solving the problems that a thermal insulation pipeline is easy to corrode and age. The thermal insulation pipeline is characterized in that the outer wall of a steel tube (1) is covered with a complex alloy corrosion-resistant layer (2), wherein the complex alloy corrosion-resistant layer (2) is covered with a polyurethane insulation thermal insulation layer (3), and the polyurethane insulation thermal insulation layer (3) is covered with a polyethylene protection layer (4); the complex alloy corrosion-resistant layer (2) is a complex alloy composite coating containing Zn, Al and Ni; the polyurethane insulation thermal insulation layer (3) is a light and high-strength thermal insulation material formed by polymerization reaction caused by polyether and isocyanate at the normal temperature; the thickness of the polyethylene protection layer (4) is not less than 1.6mm, and the polyethylene protection layer (4) is a cylindrical seamless protection shell formed by carrying out high-temperature heating and melting on high-density polyethylene particles by virtue of an extruder and has waterproof and anti-compression functions. The low-lying anti-corrosion alloyed corrosion-prevention thermal insulation pipeline has the characteristics of strong corrosion resistance and long service life.
Description
Technical field
The utility model relates to oil field pipe field, particularly oil field insulation pipe, specifically a kind of low-lying corrosion resistant alloy corrosion-resistanting insulation pipe.
Background technique
Northeast song-Nen plain is the oil-producing area of China's maximum, be located in north temperature zone high latitudes extremely frigid zones, as continental oil fields soil, soil salt content is large, the deep-etching districts such as that about 15% gathering line need to be laid in is low-lying, marsh, edatope inclement condition, level of ground water is high, when pipeline anticorrosion coating occur local damage or aging after, form large negative electrode (non-destruction region), primary anode (breaking point), as the metallic conduit position of anode, because of this electrochemical corrosion, cause pitting corrosion, insulation pipe declines working life.
In order to extend insulation pipe in low-lying and swampy area working life, conventionally adopted the cathode protection technology of impressed current or sacrificial anode in the past, impressed current method needs continuous external power supply, safeguard that power supply expense is higher, and because low-lying and the effect of quagmire stray electrical current cause overprotection, cause destruction and the tubing hydrogen embrittlement of anticorrosive coat, although sacrificial anode is non-maintaining, but still exist away from anode spot protective action and reduce problem, domesticly in recent years also there is a kind of electrochemistry thermal insulation pipe, by take simple zinc-aluminium, become alloy layer as dominant shape, realized the full coverage of old oil pipe base material, only be useful under normal soil secondary corrosive environment and use, in marsh and the high one-level soil deep-etching region of low-lying saliferous alkali number, use, zinc-aluminium atom has been accelerated consumption as anode material, exist coating to shift to an earlier date efflorescence and problem of aging, shortened working life, therefore, the corrosion-resistant thermal insulation new structure engineering significance meeting under Special Geographic geological condition is great.
Model utility content
For solving the problem existing in background technique, the utility model proposes a kind of without additional power source, the low-lying corrosion resistant alloy corrosion-resistanting insulation pipe that corrosion resistance is strong.
The technological scheme that the utility model adopts is: a kind of low-lying corrosion resistant alloy corrosion-resistanting insulation pipe, comprise steel pipe, multicomponent alloy anticorrosion layer, polyurethane insulation coating, polyethylene protective coating, it is characterized in that: outer wall of steel pipe is coated with multicomponent alloy anticorrosion layer, multicomponent alloy anticorrosion layer is coated with polyurethane insulation coating outward, and polyethylene protective coating covers outside polyurethane insulation coating.
Described polynary corrosion resistant alloy layer thickness 200 μ m-300 μ m are the multicomponent alloy composite coatings that comprise Zn, Al, Ni.
Described polyurethane heat-insulation layer thickness is 25mm-30mm, is by polyethers and isocyanates a kind of light weight that polymerization reaction take place forms at normal temperatures, high-strength thermal insulating material.
Described polyethylene overcoat thickness is not less than 1.6mm, be by high density polyethylene (HDPE) particle through extruder high-temperature heating, the formed tubular of melting is seamless containment vessel, there is waterproof, resistance to compression function.
Due to the technological scheme that adopts the utility model to adopt, this low-lying corrosion resistant alloy corrosion-resistanting insulation pipe has advantages of that multicomponent alloy passivation, self-cathode polarization protection, alloy-layer are reliable and stable.Screen theory, weldability is good, in low-lying and region, marsh long service life.
Accompanying drawing explanation
Fig. 1 is organigram of the present invention.
1-steel pipe in figure, 2-multicomponent alloy anticorrosion layer, 3-polyurethane insulation coating, 4-polyethylene protective coating.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figure 1, a kind of low-lying corrosion resistant alloy corrosion-resistanting insulation pipe, comprise steel pipe 1, multicomponent alloy anticorrosion layer 2, polyurethane insulation coating 3, polyethylene protective coating 4, it is characterized in that: steel pipe 1 outer wall is coated with multicomponent alloy anticorrosion layer 2, the outer polyurethane insulation coating 3 that is coated with of multicomponent alloy anticorrosion layer 2, polyethylene protective coating 4 covers outside polyurethane insulation coating 3, polynary corrosion-resistant alloy layer 2 thickness 200 μ m-300 μ m, to comprise Zn, Al, the multicomponent alloy composite coating of Ni, polyurethane insulation coating 3 thickness are 25mm-30mm, by polyethers and isocyanates a kind of light weight that polymerization reaction take place forms at normal temperatures, high-strength thermal insulating material, polyethylene protective coating 4 thickness are not less than 1.6mm, through extruder high-temperature heating by high density polyethylene (HDPE) particle, the formed tubular of melting is seamless containment vessel, there is waterproof, resistance to compression function.
In real work, low-lying corrosion resistant alloy corrosion-resistanting insulation pipe is imbedded low-lying, swampy area, due to multicomponent alloy anticorrosion layer 2 and steel pipe metallurgy combination, multicomponent alloy anticorrosion layer 2 has impact resistance, zinc in multicomponent alloy anticorrosion layer 2, aluminium anodes metal, for steel pipe 1 matrix provides good sacrificial coatings, there is cathodic protection effect, low-lying corrosion resistant alloy corrosion-resistanting insulation pipe soaks the initial stage, follow Zn-Al atom sacrificial anode to occur gradually, corrosion potential presents the trend of shuffling fluctuating, due to the further performance of Zn-Ni as anode material effect, Ni has played stable Zn (OH)
2and Al(OH)
3effect, makes ZnO and Al
2o
3passivation film structure more stable fine and close, and without disengaging, efflorescence and aliquation phenomenon, there is cathode screen phenomenon in conventional cathode protecting process, make thermal insulation layer away from infiltration district, become the blind area of electrochemical protection, because multicomponent alloy anticorrosion layer 2 has covered the feature of steel pipe 1 and spontaneous electric current thereof completely, eliminated the cathode screen phenomenon of thermal insulation pipe, conventional organic material is anticorrosion, after pipeline enclosure connection part anticorrosive coat is destroyed, coating disconnects protection, and the multicomponent alloy anticorrosion layer of low-lying corrosion resistant alloy corrosion-resistanting insulation pipe is zinc, aluminium, nickel multicomponent alloy layer and with pipe matrix be metallurgy combination, possesses weldability, and not burning anticorrosive coat after welding, because anticorrosive coat self has the non-maintaining electro-chemical protection of spontaneous electric current, and the stability under deep-etching condition, and extend greatly working life of pipeline, simultaneously, in product application process, do not need to safeguard.
Claims (1)
1. a low-lying corrosion resistant alloy corrosion-resistanting insulation pipe, comprise steel pipe (1), multicomponent alloy anticorrosion layer (2), polyurethane insulation coating (3), polyethylene protective coating (4), it is characterized in that: steel pipe (1) outer wall is coated with and comprises Zn, Al, Ni thickness is the multicomponent alloy anticorrosion layer (2) of 200 μ m-300 μ m, the outer polyurethane insulation coating (3) that is coated with of multicomponent alloy anticorrosion layer (2), polyurethane insulation coating (3) thickness is 25mm-30mm, polyethylene protective coating (4) covers outside polyurethane insulation coating (3), polyethylene protective coating (4) thickness is not less than 1.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320724871.9U CN203517022U (en) | 2013-11-15 | 2013-11-15 | Low-lying anti-corrosion alloyed corrosion-prevention thermal insulation pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320724871.9U CN203517022U (en) | 2013-11-15 | 2013-11-15 | Low-lying anti-corrosion alloyed corrosion-prevention thermal insulation pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203517022U true CN203517022U (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320724871.9U Expired - Fee Related CN203517022U (en) | 2013-11-15 | 2013-11-15 | Low-lying anti-corrosion alloyed corrosion-prevention thermal insulation pipeline |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629446A (en) * | 2013-11-15 | 2014-03-12 | 中国石油天然气集团公司 | Low-lying corrosion-resisting alloying corrosion-resisting heat-preservation pipeline and processing technology thereof |
| CN111019323A (en) * | 2019-12-13 | 2020-04-17 | 西安润川环保科技有限公司 | Preparation method of pipeline for sewage treatment |
| CN116464845A (en) * | 2023-04-17 | 2023-07-21 | 江苏润扬管件有限责任公司 | Nickel-based superalloy anti-corrosion high-pressure pipe fitting |
-
2013
- 2013-11-15 CN CN201320724871.9U patent/CN203517022U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629446A (en) * | 2013-11-15 | 2014-03-12 | 中国石油天然气集团公司 | Low-lying corrosion-resisting alloying corrosion-resisting heat-preservation pipeline and processing technology thereof |
| CN103629446B (en) * | 2013-11-15 | 2016-02-10 | 中国石油天然气集团公司 | Low-lying corrosion resistant alloy corrosion-resistanting insulation pipe and processing technology thereof |
| CN111019323A (en) * | 2019-12-13 | 2020-04-17 | 西安润川环保科技有限公司 | Preparation method of pipeline for sewage treatment |
| CN116464845A (en) * | 2023-04-17 | 2023-07-21 | 江苏润扬管件有限责任公司 | Nickel-based superalloy anti-corrosion high-pressure pipe fitting |
| CN116464845B (en) * | 2023-04-17 | 2023-10-24 | 江苏润扬管件有限责任公司 | Nickel-based superalloy anti-corrosion high-pressure pipe fitting |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20211115 |