CN109058658A - A kind of three layers of PE anticorrosion structure of joint coating on pipeline and construction technology - Google Patents
A kind of three layers of PE anticorrosion structure of joint coating on pipeline and construction technology Download PDFInfo
- Publication number
- CN109058658A CN109058658A CN201811133530.8A CN201811133530A CN109058658A CN 109058658 A CN109058658 A CN 109058658A CN 201811133530 A CN201811133530 A CN 201811133530A CN 109058658 A CN109058658 A CN 109058658A
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- Prior art keywords
- layer
- pipeline
- adhesive
- polyethylene
- anticorrosive paint
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- 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
- F16L58/16—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings the coating being in the form of a bandage
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The invention patent discloses a kind of three layers of PE anticorrosion structure of joint coating on pipeline and construction technology, a kind of three layers of PE anticorrosion structure of joint coating on pipeline, it include: pipeline, anticorrosive paint layer, adhesive-layer, polyethylene layer, fixing belt, a kind of three layers of PE anticorrosion structure construction technology of joint coating on pipeline, comprising: pipeline pretreatment, the spraying of anticorrosive paint layer, setting adhesive-layer and polyethylene layer, fixing belt installation.Anticorrosive paint layer of the invention carries out coating improvement according to the actual needs of repaired mouth, adhesive-layer and polyethylene layer carry out heat fusion when installing, so that anti-corrosion effect is more preferable, performance is more stable, reliability is higher, device therefor and material price are cheaply at low cost, provide a kind of for pipeline corrosion protection repaired mouth, and each section is completely embedded, antiseptic property is superior, high reliablity, easy construction, three layers of PE anticorrosion structure of joint coating on pipeline at low cost and construction technology.
Description
Technical field
The present invention relates to the three layers of PE anticorrosion structure in pipeline corrosion protection field more particularly to joint coating on pipeline and construction technologies.
Background technique
Pipeline for carrying out natural gas and Crude Oil Transportation is mostly the metallic conduit for being embedded in underground for a long time, these pipeline pavings
If distance, overlay area is more, the different types of soil such as weak soil, sandy soil, rock even marsh can be passed through, with various temperature
The environment contact of degree, humidity, pH value and stray electrical current.This results in pipeline to will receive the corrosiveness of various factors, right
Pipeline causes no small damage, so that pipeline is perforated, pumped (conveying) medium is caused to be revealed, and pollutes environment, or even set off an explosion, leads
Cause casualties and property loss, it is necessary to anti-corrosion measure be taken to prevent.
In order to avoid endangering caused by corrosive pipeline, related anti-corrosion research has been carried out both at home and abroad, and has been developed some anti-
Rotten measure, anticorrosive paint are exactly one of measure of most common of them.Due to pipeline need for many years even decades be embedded in underground, one
The coating of a little mine cathodic disbondings and type protectiveness difference can be peeled off gradually, lose protecting effect.Therefore it needs constantly to be researched and developed
It improves, to develop the anticorrosive paint for adapting to various environment and various demands.
Polyethylene three-decker protective layer is relatively advanced pipeline corrosion protection measure at present, by anticorrosive paint, binder and
Three layers of extruded polyethylene composition, antiseptic property and mechanical protection performance are all fine and durable.But there is also some disadvantages,
It cannot be used in conjunction with cathodic protection, the layered position of three-decker is there are connectivity problem, and performance is affected by temperature, anti-corrosion
Paint thickness detection difficult, connecting portion anti-corrosion effect especially between tubes are poor.At the repaired mouth of pipeline, using poly-
Ethylene three-decker protective layer, carry out anti-corrosion when will appear commissure erosion resistant coating be thinned can not remove, with pipe main body erosion resistant coating
Inconsistent problem, and then influence the anti-corrosion effect of joint coating on pipeline.
Foreign countries have been directed to polyethylene three-decker protective layer patch technology and have carried out years of researches, and achieve certain
Achievement, and it is domestic for the technology in terms of Pipeline joint anticorrosion and immature, mainly added using heat-shrink tube and liquid epoxy coating
Two kinds of measures of heat-shrink tube, but the preserved levels of polyethylene three-decker protective layer are not achieved in its preserved levels, so that repaired mouth position
The anti-corrosion elder generation set and tube body influence the using effect of entire pipeline by corrosive attack.
Summary of the invention
Present invention aim to address anti-corrosion measure difficulty, anti-corrosion at pipeline corrosion protection repaired mouth, are taken using pipeline
The poor problem of effect, provides a kind of for pipeline corrosion protection repaired mouth, each section is completely embedded, antiseptic property is superior, high reliablity,
Three layers of PE anticorrosion structure of joint coating on pipeline at low cost, easy to operate and construction technology.
A kind of the technical solution adopted in the present invention: three layers of PE anticorrosion structure of joint coating on pipeline, comprising: pipeline, anticorrosive paint
Layer, adhesive-layer, polyethylene layer, fixing belt, the anticorrosive paint layer are improved clinkery epoxy powder coating, are applied to pipeline
Surface forms fine and close coating；The adhesive-layer is made of ethylenic copolymer adhesive, by ethylenic copolymer adhesive system
It is made adhesive tape, is wrapped in outside anticorrosive paint layer；The polyethylene layer is collectively formed by polyethylene and copolymer jelly, is wrapped in viscous
Glue-line is outer and repaired mouth two sides pipe main body on anticorrosive paint layer；The fixing belt is polypropylene composition, is mounted on polyethylene layer
Edge reinforces the connection between polyethylene layer and surrounding anticorrosive paint layer.
Preferably, the anticorrosive paint layer is clinkery epoxy powder coating, but different from common clinkery epoxy powder coating,
Formulation for coating material used in the present invention are as follows: 601 90 parts of epoxy resin, 45 parts of pigments and fillers, help 28 parts of modified dicyandiamine miaow Cuo curing agent
0.8 part of agent, the clinkery epoxy powder coating of the formula is more able to satisfy the requirement of preventing corrosion of repaired mouth.
Preferably, the adhesive-layer is made of ethylenic copolymer adhesive, and ethylenic copolymer adhesive is individually made
It is made adhesive tape, adhesive tape thickness 1.0mm, width and reserving for joint coating on pipeline position are of same size.
Preferably, the composition of the polyethylene layer are as follows: first handle polyethylene substrate by crosslinking with radiation, then to copolymer
Binder is modified processing, then the two is fabricated to the composite band of thermal contraction formula, and polyethylene substrate glues with a thickness of 2.5mm
Jelly is with a thickness of 1.3mm, and the polyethylene layer is covered on the outside of adhesive-layer and the anticorrosive paint layer of two side ducts of repaired mouth position is each
There is 150mm capped.
A kind of three layers of PE anticorrosion structure construction technology specific implementation of joint coating on pipeline of the present invention are as follows:
(1) pipeline pre-processes: handling the pipe surface of repaired mouth position, cleans up rusty stain and the dirt of pipe surface
Stain carries out coarse processing, and pipe surface depth of abrasion pattern is made to reach 55~80 μm, carries out polarization feather plucking, pole to two side ducts of repaired mouth
Change feather plucking width to be 150mm and cleared up, protection then is thermally shielded to two side ducts of repaired mouth, the pipeline of repaired mouth position is adopted
It is preheated with dedicated combustion gas far-infrared heater, while carrying out temperature measurement using temperature measurer, so that pipe temperature is preheating to
220℃；
(2) anticorrosive paint layer sprays: clinkery epoxy powder being sprayed at pipe surface, spraying is uniformly and abundant, thickness
At least up to 120 μm, so as to form anticorrosive paint layer；
(3) adhesive-layer and polyethylene layer are set: before clinkery epoxy powder solidification, adhesive tape being wrapped in anti-corrosion and is applied
Bed of material surface, is combined together with epoxy powder, forms adhesive-layer, polyethylene composite band is then wrapped in viscose glue layer surface
On, while winding, is heated, rolled on one side with roller on one side, to promote merging for polyethylene composite band and adhesive-layer,
Polyethylene composite band is not only wrapped in viscose glue layer surface, is also wrapped on the anticorrosive paint layer in two test tube road of repaired mouth, two sides respectively twine
Around the width of 150mm, so as to form polyethylene layer；
(4) fixing belt is installed: fixing belt is mounted on to the edge of polyethylene layer, it is wide centered on the edge of polyethylene layer
300mm is spent, is fixed using hot melt adhesion.
Beneficial effects of the present invention: (1) anticorrosive paint layer carries out coating improvement according to the actual needs of repaired mouth, after optimization
Clinkery epoxy powder is suitable for the requirement of preventing corrosion of repaired mouth, and anti-corrosion effect is more preferable, and performance is more stable；(2) adhesive-layer and poly- second
Alkene layer is fabricated to the form of adhesive tape and composite band respectively, and when installation carries out heat fusion, so that the combination connection between each layer is more
Step up close stabilization, antiseptic property is more superior, high reliablity；(3) it carries out installation device therefor and material requested is that pipeline is anti-
Rotten conventional equipment and material, it is cheap, it is at low cost, and installation steps and easy to operate.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
In figure: 1-pipeline, 2-anticorrosive paint layers, 3-adhesive-layers, 4-polyethylene layers, 5-fixing belts.
Specific embodiment:
The present invention is described in detail with specific example with reference to the accompanying drawing.
As shown, structure of the invention includes: pipeline (1), anticorrosive paint layer (2), adhesive-layer (3), polyethylene layer
(4), fixing belt (5), the anticorrosive paint layer (2) are improved clinkery epoxy powder coating, are applied to pipeline (1) surface,
Form fine and close coating；The adhesive-layer (3) is made of ethylenic copolymer adhesive, and ethylenic copolymer adhesive is made
Plastic band is wrapped on the outside of anticorrosive paint layer (2)；The polyethylene layer (4) is collectively formed by polyethylene and copolymer jelly, packet
It is rolled on the outside of adhesive-layer (3), the anticorrosive paint layer (2) in two side ducts of repaired mouth (1) main body also has part to be covered by polyethylene layer (4)
Lid；The fixing belt (5) is polypropylene composition, is arranged in the edge of polyethylene layer (4), reinforces polyethylene layer (4) and surrounding is anti-
Connection between rotten dope layer (2).
Preferably, the anticorrosive paint layer (2) is clinkery epoxy powder coating, but not with common clinkery epoxy powder coating
Together, the formulation for coating material used in the present invention are as follows: 601 90 parts of epoxy resin, 28 parts of modified dicyandiamine miaow Cuo curing agent, pigments and fillers 45
Part, 0.8 part of auxiliary agent, the clinkery epoxy powder coating of the formula is more able to satisfy the requirement of preventing corrosion of repaired mouth.
Preferably, the adhesive-layer (3) is made of ethylenic copolymer adhesive, and ethylenic copolymer adhesive is independent
It is fabricated to adhesive tape, adhesive tape thickness 1.0mm, width and reserving for pipeline (1) repaired mouth position are of same size.
Preferably, the composition of the polyethylene layer (4) are as follows: first handle polyethylene substrate by crosslinking with radiation, then to altogether
Polymers binder is modified processing, then the two is fabricated to the composite band of thermal contraction formula, polyethylene substrate with a thickness of
2.5mm, adhesive are covered on adhesive-layer (3) outside with a thickness of 1.3mm, the polyethylene layer (4), two side ducts of repaired mouth position (1)
Anticorrosive paint layer (2) respectively have 150mm capped.
A kind of three layers of PE anticorrosion structure construction technology specific implementation of joint coating on pipeline of the present invention are as follows:
(1) pipeline (1) pre-processes: handling pipeline (1) surface of repaired mouth position, cleans up pipeline (1) surface
Rusty stain and spot carry out coarse processing, and pipeline (1) surface depth of abrasion pattern is made to reach 55~80 μm, to two side ducts of repaired mouth (1) into
Row polarization feather plucking, polarization feather plucking width is 150mm and is cleared up, and is then thermally shielded protection to two side ducts of repaired mouth (1), right
The pipeline (1) of repaired mouth position is preheated using dedicated combustion gas far-infrared heater, while carrying out temperature measurement using temperature measurer,
So that pipeline (1) preheating temperature is to 220 DEG C；
(2) anticorrosive paint layer (2) sprays: clinkery epoxy powder is sprayed at pipeline (1) surface, spraying is uniformly and abundant,
Its thickness is at least up to 120 μm, so as to form anticorrosive paint layer (2)；
(3) adhesive-layer (3) and polyethylene layer (4) are set: before clinkery epoxy powder solidification, adhesive tape being wrapped in
Anticorrosive paint layer (2) surface, is combined together with epoxy powder, is formed adhesive-layer (3), is then wrapped in polyethylene composite band
On adhesive-layer (3) surface, winding while, heated, rolled on one side with roller on one side, with promote polyethylene composite band with
The fusion of adhesive-layer (3), polyethylene composite band are not only wrapped in adhesive-layer (3) surface, are also wrapped in two test tube road (1) of repaired mouth
On anticorrosive paint layer (2), two sides respectively wind the width of 150mm, so as to form polyethylene layer (4)；
(4) fixing belt (5) is installed: fixing belt (5) being mounted on to the edge of polyethylene layer (4), with polyethylene layer (4)
Centered on edge, width 300mm is fixed using hot melt adhesion.
Claims (5)
1. a kind of three layers of PE anticorrosion structure of joint coating on pipeline, it is characterised in that: include: pipeline (1), anticorrosive paint layer (2), adhesive-layer
(3), polyethylene layer (4), fixing belt (5), the anticorrosive paint layer (2) are improved clinkery epoxy powder coating, are applied to
Pipeline (1) surface forms fine and close coating；The adhesive-layer (3) is made of ethylenic copolymer adhesive, by vinyl copolymer
Object adhesive is fabricated to adhesive tape, is wrapped on the outside of anticorrosive paint layer (2)；The polyethylene layer (4) is by polyethylene and copolymer glue
Agent collectively forms, and is not only wrapped on the outside of adhesive-layer (3), the anticorrosive paint layer being also wrapped in two side ducts of repaired mouth (1) main body
(2)；The fixing belt (5) is polypropylene composition, is arranged in the edge of polyethylene layer (4).
2. three layers of PE anticorrosion structure of a kind of joint coating on pipeline according to claim 1, it is characterised in that: the anticorrosive paint layer
It (2) is clinkery epoxy powder coating, formulation for coating material used are as follows: 601 90 parts of epoxy resin, modified dicyandiamine miaow Cuo curing agent 28
Part, 45 parts of pigments and fillers, 0.8 part of auxiliary agent.
3. three layers of PE anticorrosion structure of a kind of joint coating on pipeline according to claim 1, it is characterised in that: the adhesive-layer (3)
It is made of ethylenic copolymer adhesive, plastic band is fabricated separately in ethylenic copolymer adhesive, adhesive tape thickness 1.0mm is wide
It spends of same size with reserving for pipeline (1) repaired mouth position.
4. three layers of PE anticorrosion structure of a kind of joint coating on pipeline according to claim 1, it is characterised in that: the polyethylene layer
(4) composition are as follows: polyethylene substrate is handled by crosslinking with radiation first, then processing is modified to copolymer binder, then
The two is fabricated to the composite band of thermal contraction formula, polyethylene substrate is with a thickness of 2.5mm, and adhesive is with a thickness of 1.3mm, the poly- second
Alkene layer (4) is covered on adhesive-layer (3) outside, and the anticorrosive paint layer (2) of two side ducts of repaired mouth position (1) respectively has 150mm capped.
5. a kind of three layers of PE anticorrosion structure construction technology of joint coating on pipeline, it is characterised in that: Specific construction processing step is as follows:
(1) pipeline (1) pre-processes: handling pipeline (1) surface of repaired mouth position, cleans up the rusty stain on pipeline (1) surface
And spot, coarse processing is carried out, pipeline (1) surface depth of abrasion pattern is made to reach 55-80 μm, pole is carried out to two side ducts of repaired mouth (1)
Change feather plucking, polarization feather plucking width is 150mm and is cleared up, and then protection is thermally shielded to two side ducts of repaired mouth (1), to repaired mouth
The pipeline (1) of position is preheated using dedicated combustion gas far-infrared heater, while carrying out temperature measurement using temperature measurer, so that
Pipeline (1) preheating temperature is to 220 DEG C；
(2) anticorrosive paint layer (2) sprays: clinkery epoxy powder being sprayed at pipeline (1) surface, spraying is uniformly and abundant, thick
At least up to 120 μm of degree, so as to form anticorrosive paint layer (2)；
(3) adhesive-layer (3) and polyethylene layer (4) are set: before clinkery epoxy powder solidification, adhesive tape being wrapped in anti-corrosion
Dope layer (2) surface, is combined together with epoxy powder, is formed adhesive-layer (3), polyethylene composite band is then wrapped in viscose glue
On layer (3) surface, while winding, is heated, rolled on one side with roller on one side, to promote polyethylene composite band and viscose glue
The fusion of layer (3), polyethylene composite band are not only wrapped in adhesive-layer (3) surface, are also wrapped in the anti-corrosion in two test tube road (1) of repaired mouth
On dope layer (2), two sides respectively wind the width of 150mm, so as to form polyethylene layer (4)；
(4) fixing belt (5) is installed: fixing belt (5) being mounted on to the edge of polyethylene layer (4), with the edge of polyethylene layer (4)
Centered on, width 300mm is fixed using hot melt adhesion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811133530.8A CN109058658A (en) | 2018-09-27 | 2018-09-27 | A kind of three layers of PE anticorrosion structure of joint coating on pipeline and construction technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811133530.8A CN109058658A (en) | 2018-09-27 | 2018-09-27 | A kind of three layers of PE anticorrosion structure of joint coating on pipeline and construction technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109058658A true CN109058658A (en) | 2018-12-21 |
Family
ID=64766272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811133530.8A Withdrawn CN109058658A (en) | 2018-09-27 | 2018-09-27 | A kind of three layers of PE anticorrosion structure of joint coating on pipeline and construction technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN109058658A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315668A (en) * | 2019-06-03 | 2019-10-11 | 西安石油大学 | A kind of steel epoxy sleeve method for renovation |
| CN112728283A (en) * | 2020-12-29 | 2021-04-30 | 金发科技股份有限公司 | Method for repairing mouth of anti-corrosion pipeline |
| CN113639126A (en) * | 2021-08-13 | 2021-11-12 | 青岛华仕达机器股份有限公司 | Anticorrosion method for pipeline joint and anticorrosion pipeline |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315668A (en) * | 2019-06-03 | 2019-10-11 | 西安石油大学 | A kind of steel epoxy sleeve method for renovation |
| CN112728283A (en) * | 2020-12-29 | 2021-04-30 | 金发科技股份有限公司 | Method for repairing mouth of anti-corrosion pipeline |
| CN112728283B (en) * | 2020-12-29 | 2023-02-21 | 金发科技股份有限公司 | Method for repairing mouth of anti-corrosion pipeline |
| CN113639126A (en) * | 2021-08-13 | 2021-11-12 | 青岛华仕达机器股份有限公司 | Anticorrosion method for pipeline joint and anticorrosion pipeline |
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Application publication date: 20181221 |