CN109114360A - A kind of high and cold Pipeline joint anticorrosion structure and method - Google Patents
A kind of high and cold Pipeline joint anticorrosion structure and method Download PDFInfo
- Publication number
- CN109114360A CN109114360A CN201811131763.4A CN201811131763A CN109114360A CN 109114360 A CN109114360 A CN 109114360A CN 201811131763 A CN201811131763 A CN 201811131763A CN 109114360 A CN109114360 A CN 109114360A
- Authority
- CN
- China
- Prior art keywords
- layer
- pipeline
- repaired mouth
- erosion resistant
- resistant coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
- F16L58/1072—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe the coating being a sprayed layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/005—Protection of pipes or objects of similar shape against external or internal damage or wear specially adapted for the ends of pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
Abstract
The invention patent discloses a kind of high and cold Pipeline joint anticorrosion structure and method, anticorrosion structure includes: pipeline, erosion resistant coating, strengthening layer, insulating layer, repaired mouth jacket layer, waterproof layer, buffer zone, and anti-corrosion method includes: line treatment, erosion resistant coating spraying and strengthening layer bonding, setting insulating layer, setting repaired mouth jacket layer, setting waterproof layer, setting buffer zone.The present invention is by using erosion resistant coating and strengthening layer double layer anticorrosive; anti-corrosion effect is more preferable; polyurethane foam tile fragment is prefabricated and in-site installation; avoiding polyurethane low-temp foaming can not form; viscoelastic body antiseptic plaster blocks seam waterproof; buffer zone strengthens seam crossing and protects intensity, provides a kind of suitable for extremely frigid zones, the high and cold Pipeline joint anticorrosion structure and method that antiseptic property is superior, high reliablity, insulation construction is complete, anti-corrosion material bonding force is strong.
Description
Technical field
The present invention relates to pipeline corrosion protection field more particularly to high and cold Pipeline joint anticorrosion fields.
Background technique
It is well known that be convenient for transporting for the petroleum and natural gas of long range, come defeated by the way of underground buried tube
Relevant supplies are sent, this pipeline mode is although economical and practical, conveys the advantages that stable, conveying capacity is big.But it also faces simultaneously
A huge problem, be exactly the safety of pipeline, and to pipe safety threaten it is maximum be exactly underground environment corrosiveness,
Since pipeline is embedded in underground for a long time, it is caused to be chronically in corrosive environment, is contacted for a long time with a variety of corrosive deposits, so that
Pipeline is gradually corroded.Therefore in order to ensure pipeline is not corroded perforation, the leakage of pumped (conveying) medium is avoided, ensures pipeline
Quality, it is necessary to preservative treatment be carried out to pipeline, to ensure the reliability conveyed.
Current existing corrosion-proof technology for pipeline has: anticorrosion with painting coating, setting insulating layer, installation protective layer etc., these pipes
Although road anti-corrosion measure plays certain protective effect, so that the service life of pipeline is ensured to a certain extent,
But these measures are applied to the tube body of pipeline more, and in addition to tube body, guarantee the integrality of pipeline system in construction work,
It needs to reserve partial region on pipeline, to carry out welding between pipeline and film making and to suppress, this partial region
Anti-corrosion measure, i.e. repaired mouth are taken, measure above-mentioned for repaired mouth is simultaneously not suitable for.
For the anti-corrosion of joint coating on pipeline, currently used conventional structure is that anti-decaying paint is first applied at joint coating on pipeline, is then wrapped up in
Upper heat-shrink tube, then insulating layer is set, electric heating melting oversleeve finally is set in outermost.But at low ambient temperatures, anti-decaying paint difficulty stirring,
Solidify undesirable, heat-shrink tube can also lose original plasticity and become fragile easy to crack, and polythene material performance can also change, and eventually lead to
Interface, which expands with heat and contract with cold, is likely to form the infiltration of seam crackle, both at home and abroad the mature experience without Pipeline joint anticorrosion under low temperature environment
It can use for reference, it is therefore necessary to take corresponding measure for the Pipeline joint anticorrosion of low temperature environment.
Summary of the invention
Present invention aim to address using pipeline, Pipeline joint anticorrosion shortage is corresponding effective at low ambient temperatures
The problem of measure, provides and a kind of is suitable for that superior extremely frigid zones, antiseptic property, high reliablity, insulation construction be complete, anti-corrosion material
The strong high and cold Pipeline joint anticorrosion technology of bonding force.
A kind of the technical solution adopted in the present invention: high and cold Pipeline joint anticorrosion structure, comprising: pipeline, erosion resistant coating, reinforcing
Layer, insulating layer, repaired mouth jacket layer, waterproof layer, buffer zone, the erosion resistant coating are anticorrosive paint, are applied to pipe surface, form densification
Coating；The strengthening layer is viscoelastic-body antiseptic adhesive tape, is wrapped in anti-corrosion layer surface, reinforces to erosion resistant coating, strengthens erosion resistant coating
Anti-corrosion effect；The insulating layer is made of polyurethane thermal-insulation tile, is located at strengthening layer periphery, is close to strengthening layer；The repaired mouth
Jacket layer is hot melt repaired mouth oversleeve, is located on the outside of insulating layer, is closely joined together, is covered with insulating layer by way of hot melt adhesion
Build the pipeline around entire repaired mouth section and repaired mouth section；The waterproof layer is viscoelastic body antiseptic plaster, is arranged in repaired mouth jacket layer and surrounding
The seam crossing of pipeline section, filling gap form transition slope mouth；The buffer zone is made up of polypropylene, and is bonded in repaired mouth jacket layer edge
Outer surface is covered on the seam crossing and waterproof layer surface of repaired mouth jacket layer and surrounding pipeline section, the intensity at reinforced seam.
Preferably, the erosion resistant coating is anticorrosive paint, replaces conventional epoxy primer to apply with two-component solid epoxy coating
Material carries out low-temperature spray, is covered on pipeline external surface, the coating can rapid curing at low temperature, be more suitable for compared to conventional coating
Psychro-environment.
Preferably, the strengthening layer replaces the thermoplastic tube of routine with viscoelastic-body antiseptic adhesive tape, is pasted onto anti-corrosion layer surface,
It combines with anticorrosive paint, is bonded under low temperature without baking.
Preferably, the polyurethane foam tile fragment that the insulating layer uses forms for prefabrication, is installed, is kept away at the scene
Having exempted from foam-in-place low temperature can not molding technical problem.
Preferably, the repaired mouth jacket layer is polyethylene composition, and insulation layer surface is tightly attached to by way of hot melt adhesion.
A kind of high and cold Pipeline joint anticorrosion method of the present invention is as follows:
(1) line treatment: to being preheated at pipe joint under the conditions of nonflame, when temperature reaches 75 DEG C, using dry
The mode of the closed sandblasting of formula removes the rusty stain near pipe joint；
(2) erosion resistant coating spraying and strengthening layer bonding: anticorrosive paint is carried out to mixed preparing under thermal environment and is sprayed at
Pipe surface forms fine and close erosion resistant coating, viscoelastic body rubber belt is equally wrapped in anti-corrosion layer surface under heat-retaining condition；
(3) insulating layer is set: polyurethane foam tile fragment being firmly pasted onto reinforcing layer surface using low temperature adhesive, with
Form insulating layer；
(4) repaired mouth jacket layer is set: sufficiently being pasted polyethylene in insulation layer surface in a manner of hot melt adhesion, so that its
It is covered on entire joint coating on pipeline region, forms repaired mouth jacket layer；
(5) waterproof layer is arranged: there are seams between the edge and surrounding pipeline section of repaired mouth jacket layer, and viscoelastic body antiseptic plaster is applied
It smears in the seam crossing, makes nature compensation grade, be formed simultaneously the waterproof layer for preventing water from flowing into.
(6) buffer zone is set: buffer zone is pasted on seam crossing between the edge of repaired mouth jacket layer and surrounding pipeline section, is covered
Repaired mouth jacket layer and around pipeline section seam crossing and waterproof layer surface.
Each step of the anti-corrosion method, ensures that normal implementation, carries out partial insulation to pipe joint,
Implement each step under heat-retaining condition.
Beneficial effects of the present invention: (1) using erosion resistant coating and strengthening layer double layer anticorrosive, and the anticorrosive paint of erosion resistant coating is double
Constituent solid epoxy coating, it is ensured that the anti-corrosion effect in low temperature environment；(2) the polyurethane foam tile fragment of protective layer, takes
Prefabrication and field erected scheme, it is ensured that the construction of insulating layer and heat insulation effect；(3) waterproof layer is smeared in seam crossing,
It is again waterproof to block gap, is formed simultaneously nature compensation grade；(4) buffer zone pasted enhances seam protection intensity.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
In figure: 1-pipeline, 2-erosion resistant coatings, 3-strengthening layers, 4-insulating layers, 5-repaired mouth jacket layers, 6-waterproof layers, 7-
Buffer zone.
Specific embodiment:
The present invention is described in detail with specific example with reference to the accompanying drawing.
As shown, the inventive system comprises: pipeline (1), erosion resistant coating (2), strengthening layer (3), insulating layer (4), repaired mouth
Jacket layer (5), waterproof layer (6), buffer zone (7), the erosion resistant coating (2) are anticorrosive paint, are applied to pipeline (1) surface, are formed fine and close
Coating；The strengthening layer (3) is viscoelastic-body antiseptic adhesive tape, is wrapped in erosion resistant coating (2) surface, reinforces to erosion resistant coating (2),
Strengthen the anti-corrosion effect of erosion resistant coating (2)；The insulating layer (4) is made of polyurethane thermal-insulation tile, is located at strengthening layer (3) periphery,
It is close to strengthening layer (3)；The repaired mouth jacket layer (5) is hot melt repaired mouth oversleeve, is located at insulating layer (4) outside, passes through the side of hot melt adhesion
Formula is closely joined together with insulating layer (4), covers entire repaired mouth section and portion pipeline section；The waterproof layer (6) is viscoelastic
Body antiseptic plaster, is located at the seam crossing of repaired mouth jacket layer (5) and surrounding pipeline section, and filling gap forms transition slope mouth；The buffer zone (7)
It is made up of polypropylene, is bonded in the outer surface at repaired mouth jacket layer (5) edge, is covered on the seam of repaired mouth jacket layer (5) and surrounding pipeline section
Place and waterproof layer (6) surface, the intensity at reinforced seam.
Preferably, the erosion resistant coating (2) is anticorrosive paint, and conventional epoxy primer is replaced with two-component solid epoxy coating
Coating carries out low-temperature spray, is covered on pipeline (1) surface, the coating can rapid curing at low temperature, it is more suitable compared to conventional coating
Close psychro-environment.
Preferably, the strengthening layer (3) replaces the thermoplastic tube of routine with viscoelastic-body antiseptic adhesive tape, is pasted on erosion resistant coating
(2) surface is combined with anticorrosive paint, is bonded under low temperature without baking.
Preferably, the polyurethane foam tile fragment that the insulating layer (4) uses forms for prefabrication, is pacified at the scene
Dress, avoiding foam-in-place low temperature can not molding technical problem.
Preferably, the repaired mouth jacket layer (5) is polyethylene composition, and insulating layer (4) are tightly attached to by way of hot melt adhesion
Surface.
A kind of high and cold Pipeline joint anticorrosion method of the present invention is as follows:
(1) pipeline (1) is handled: being preheated under the conditions of nonflame to pipeline (1) interface, when its temperature reaches 75 DEG C
When, the rusty stain near pipeline (1) interface is removed using the mode of the closed sandblasting of dry type；
(2) anticorrosive paint erosion resistant coating (2) spraying and strengthening layer (3) bonding: is subjected to mixed preparing simultaneously under thermal environment
It is sprayed at pipeline (1) surface, fine and close erosion resistant coating (2) is formed, viscoelastic body rubber belt is equally wrapped in anti-corrosion under heat-retaining condition
Layer (2) surface forms strengthening layer (3)；
(3) insulating layer (4) are set: polyurethane foam tile fragment being firmly pasted onto strengthening layer (3) table using low temperature adhesive
Face, to form insulating layer (4)；
(4) repaired mouth jacket layer (5) are set: sufficiently being pasted polyethylene on insulating layer (4) surface in a manner of hot melt adhesion,
So that it is covered on entire pipeline (1) repaired mouth region, formed repaired mouth jacket layer (5)；
(5) waterproof layer (6) are arranged: there are seams between the edge and surrounding pipeline section of repaired mouth jacket layer (5), and viscoelastic body is prevented
Rotten cream is applied to the seam crossing, makes nature compensation grade, is formed simultaneously the waterproof layer (6) of waterproof inflow；
(6) buffer zone (7) are set: buffer zone (7) being pasted between the edge and surrounding pipeline section of repaired mouth jacket layer (5) and is connect
At seam, it is covered on the seam crossing and waterproof layer (6) of repaired mouth jacket layer (5) and surrounding pipeline section.
Each step of the anti-corrosion method, ensures that normal implementation, carries out local guarantor to pipeline (1) interface
Temperature implements each step under heat-retaining condition.
Claims (7)
1. a kind of high and cold Pipeline joint anticorrosion structure, comprising: pipeline (1), strengthening layer (3), insulating layer (4), is mended erosion resistant coating (2)
Muzzle layer (5), waterproof layer (6), buffer zone (7), it is characterised in that: the erosion resistant coating (2) is anticorrosive paint, is applied to pipeline (1)
Surface forms fine and close coating；The strengthening layer (3) is viscoelastic-body antiseptic adhesive tape, erosion resistant coating (2) surface is wrapped in, to anti-corrosion
Layer (2) is reinforced, and the anti-corrosion effect of erosion resistant coating (2) is strengthened；The insulating layer (4) is made of polyurethane thermal-insulation tile, is located at
Strengthening layer (3) periphery, is close to strengthening layer (3)；The repaired mouth jacket layer (5) is hot melt repaired mouth oversleeve, is located at insulating layer (4) outside, is led to
The mode and insulating layer (4) for crossing hot melt adhesion are closely joined together, and cover entire repaired mouth section and portion pipeline section；It is described anti-
Water layer (6) is viscoelastic body antiseptic plaster, is located at the seam crossing of repaired mouth jacket layer (5) and surrounding pipeline section, and filling gap forms transition slope mouth；
The buffer zone (7) is made up of polypropylene, and is bonded in the outer surface at repaired mouth jacket layer (5) edge, is covered on repaired mouth jacket layer (5) and week
Seam crossing and waterproof layer (6) surface of bustle pipe section, the intensity at reinforced seam.
2. a kind of high and cold Pipeline joint anticorrosion structure according to claim 1, it is characterised in that: the erosion resistant coating (2) is
Anticorrosive paint replaces conventional epoxy primer coating with two-component solid epoxy coating, carries out low-temperature spray, is covered on pipeline
(1) surface.
3. a kind of high and cold Pipeline joint anticorrosion structure according to claim 1, it is characterised in that: the strengthening layer (3) with
Viscoelastic-body antiseptic adhesive tape replaces conventional thermoplastic tube, is pasted on erosion resistant coating (2) surface, combines with anticorrosive paint.
4. a kind of high and cold Pipeline joint anticorrosion structure according to claim 1, it is characterised in that: the insulating layer (4) is adopted
Polyurethane foam tile fragment is that prefabrication forms, and is installed at the scene.
5. a kind of high and cold Pipeline joint anticorrosion structure according to claim 1, it is characterised in that: the repaired mouth jacket layer (5)
For polyethylene composition, insulating layer (4) surface is tightly attached to by way of hot melt adhesion.
6. a kind of high and cold Pipeline joint anticorrosion method, it is characterised in that: steps are as follows for specific method each:
(1) pipeline (1) is handled: being preheated under the conditions of nonflame to pipeline (1) interface, when its temperature reaches 75 DEG C, is made
The rusty stain near pipeline (1) interface is removed with the mode of the closed sandblasting of dry type；
(2) erosion resistant coating (2) spraying and strengthening layer (3) bonding: anticorrosive paint is carried out to mixed preparing under thermal environment and is sprayed
In pipeline (1) surface, fine and close erosion resistant coating (2) is formed, viscoelastic body rubber belt is wrapped in erosion resistant coating (2) equally under heat-retaining condition
Surface forms strengthening layer (3)；
(3) insulating layer (4) are set: polyurethane foam tile fragment being firmly pasted onto strengthening layer (3) surface using low temperature adhesive,
To form insulating layer (4)；
(4) repaired mouth jacket layer (5) are set: sufficiently being pasted polyethylene on insulating layer (4) surface in a manner of hot melt adhesion, so that
It is covered on entire pipeline (1) repaired mouth region, is formed repaired mouth jacket layer (5)；
(5) waterproof layer (6) are arranged: there are seams between the edge and surrounding pipeline section of repaired mouth jacket layer (5), by viscoelastic body antiseptic plaster
It is applied to the seam crossing, makes nature compensation grade, is formed simultaneously the waterproof layer (6) of waterproof inflow；
(6) buffer zone (7) are set: buffer zone (7) is pasted on seam crossing between the edge and surrounding pipeline section of repaired mouth jacket layer (5),
It is covered on the seam crossing and waterproof layer (6) of repaired mouth jacket layer (5) and surrounding pipeline section.
7. a kind of high and cold Pipeline joint anticorrosion method according to claim 6, it is characterised in that: the anti-corrosion method is each
Step ensures that normal implementation, carries out partial insulation to pipeline (1) interface, implements each step under heat-retaining condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811131763.4A CN109114360A (en) | 2018-09-27 | 2018-09-27 | A kind of high and cold Pipeline joint anticorrosion structure and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811131763.4A CN109114360A (en) | 2018-09-27 | 2018-09-27 | A kind of high and cold Pipeline joint anticorrosion structure and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109114360A true CN109114360A (en) | 2019-01-01 |
Family
ID=64856890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811131763.4A Withdrawn CN109114360A (en) | 2018-09-27 | 2018-09-27 | A kind of high and cold Pipeline joint anticorrosion structure and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109114360A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198596A (en) * | 2021-11-24 | 2022-03-18 | 中投(天津)智能管道股份有限公司 | Pipeline joint heat preservation construction process suitable for extremely cold weather |
| CN114216001A (en) * | 2021-11-24 | 2022-03-22 | 中投(天津)智能管道股份有限公司 | Heat insulation construction process suitable for directional drilling crossing section heat insulation pipeline interface in high and cold area |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2292182A1 (en) * | 1974-11-20 | 1976-06-18 | Sofregaz | Coated pipelines carrying heated heavy oil - provided with multiple plastic coatings for corrosion protection and thermal insulation |
| CN2818982Y (en) * | 2005-08-11 | 2006-09-20 | 中国石油天然气集团公司 | Polyurethane foaming thermal-insulative pipe with polyurea coating as mouth |
| CN201521723U (en) * | 2009-09-28 | 2010-07-07 | 大庆油田有限责任公司 | Low-temperature high-strength anti-corrosion heat insulation composite pipeline |
| CN202746792U (en) * | 2012-06-21 | 2013-02-20 | 中国石油天然气集团公司 | Pipeline with compound heat-preservation mouth repairing structure in permafrost region |
| CN203240190U (en) * | 2013-04-17 | 2013-10-16 | 中国石油天然气股份有限公司 | Repaired mouth repairing anticorrosion coating structure of in-service pipeline |
-
2018
- 2018-09-27 CN CN201811131763.4A patent/CN109114360A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2292182A1 (en) * | 1974-11-20 | 1976-06-18 | Sofregaz | Coated pipelines carrying heated heavy oil - provided with multiple plastic coatings for corrosion protection and thermal insulation |
| CN2818982Y (en) * | 2005-08-11 | 2006-09-20 | 中国石油天然气集团公司 | Polyurethane foaming thermal-insulative pipe with polyurea coating as mouth |
| CN201521723U (en) * | 2009-09-28 | 2010-07-07 | 大庆油田有限责任公司 | Low-temperature high-strength anti-corrosion heat insulation composite pipeline |
| CN202746792U (en) * | 2012-06-21 | 2013-02-20 | 中国石油天然气集团公司 | Pipeline with compound heat-preservation mouth repairing structure in permafrost region |
| CN203240190U (en) * | 2013-04-17 | 2013-10-16 | 中国石油天然气股份有限公司 | Repaired mouth repairing anticorrosion coating structure of in-service pipeline |
Non-Patent Citations (1)
| Title |
|---|
| 郜玉新: "复合防腐保温管道低温补口研究及应用" * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198596A (en) * | 2021-11-24 | 2022-03-18 | 中投(天津)智能管道股份有限公司 | Pipeline joint heat preservation construction process suitable for extremely cold weather |
| CN114216001A (en) * | 2021-11-24 | 2022-03-22 | 中投(天津)智能管道股份有限公司 | Heat insulation construction process suitable for directional drilling crossing section heat insulation pipeline interface in high and cold area |
| CN114198596B (en) * | 2021-11-24 | 2024-02-13 | 中投(天津)智能管道股份有限公司 | Thermal insulation construction process suitable for pipeline joint under extremely cold weather |
| CN114216001B (en) * | 2021-11-24 | 2024-03-29 | 中投(天津)智能管道股份有限公司 | Insulation construction process suitable for joint of directional drilling section heat insulation pipeline in alpine region |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103925455B (en) | A kind of water body joint coating on pipeline guard method and structure | |
| CN101660647B (en) | Ever frozen soil anti-corrosion heat-insulating pipeline joint coating technology | |
| CN202746792U (en) | Pipeline with compound heat-preservation mouth repairing structure in permafrost region | |
| MY163045A (en) | Low temperature method and system for forming field joints on undersea pipelines | |
| EP2836757B1 (en) | Method of manufacturing a field joint coating | |
| CN103322364B (en) | The connecting means of internal and external anti-corrosive steel-plastic composite pipe | |
| CN109114360A (en) | A kind of high and cold Pipeline joint anticorrosion structure and method | |
| US20080136169A1 (en) | Pipeline field joint coating for wet insulation with improved adhesion | |
| CN100335839C (en) | Steel-enclosing-steel high temperature resistant direct burial anticorrosive insulating system | |
| CN107289234B (en) | Repairing structure and repairing method for anticorrosive and heat-insulating layer of heat-insulating pipeline | |
| CN201057317Y (en) | Ocean floor oil pipeline and joint coating of polyurea protective covering | |
| CN202852332U (en) | Double-layer epoxy powder antiseptic polyurethane thermal insulation pipeline | |
| CN209370706U (en) | A kind of high and cold Pipeline joint anticorrosion structure | |
| CN203413252U (en) | Device for connecting inner and outer anticorrosive steel plastic composite pipes | |
| CN116792607A (en) | Interface heat preservation construction process under low-temperature high-water-level environment | |
| US11559949B2 (en) | Method for connecting two unitary elements of a conduit for transporting fluids by means of a sleeve | |
| CN204717234U (en) | Directional traversing pipeline sheath tube end annular space waterproof construction | |
| CN105257917A (en) | Variable-diameter type corrosion-preventing high-temperature-resisting buried composite thermal insulation pipeline and mounting method | |
| CN202361000U (en) | Sealed waterproof submarine thermal-insulation pipe | |
| CN101696759B (en) | Anti-corrosive treatment method of welded junction part of construction process pipe of heavy caliber push pipe | |
| CN105156831B (en) | A kind of compound repaired mouth structure of heavy caliber submarine pipeline weight coating | |
| CN211649500U (en) | Anticorrosive, anti-seepage and heat-insulating reinforced direct-buried heat supply pipeline | |
| CN201198928Y (en) | Seal device of building wall through hole with guarding tube | |
| CN210978982U (en) | Novel prefabricated joint heat preservation oversleeve of glass fiber | |
| CN204962059U (en) | High leakproofness steel bushing steel presetting system insulating tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190101 |