CN219712561U - High-performance heat-bending elbow anti-corrosion structure - Google Patents
High-performance heat-bending elbow anti-corrosion structure Download PDFInfo
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- CN219712561U CN219712561U CN202320021468.3U CN202320021468U CN219712561U CN 219712561 U CN219712561 U CN 219712561U CN 202320021468 U CN202320021468 U CN 202320021468U CN 219712561 U CN219712561 U CN 219712561U
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- steel pipe
- protective layer
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- 238000005260 corrosion Methods 0.000 title claims abstract description 40
- 238000005452 bending Methods 0.000 title claims abstract description 7
- 239000011241 protective layer Substances 0.000 claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 239000010410 layer Substances 0.000 claims abstract description 27
- 239000011159 matrix material Substances 0.000 claims abstract description 22
- 239000004593 Epoxy Substances 0.000 claims abstract description 13
- 239000012790 adhesive layer Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000005536 corrosion prevention Methods 0.000 claims abstract description 7
- 239000003973 paint Substances 0.000 claims abstract description 6
- 238000013003 hot bending Methods 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 9
- 230000007797 corrosion Effects 0.000 claims description 8
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 9
- 229920006334 epoxy coating Polymers 0.000 abstract description 6
- 238000000016 photochemical curing Methods 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 238000001723 curing Methods 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 238000005507 spraying Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
The utility model relates to the technical field of oil pipeline corrosion prevention, in particular to a high-performance heat-bending elbow corrosion prevention structure. The anti-corrosion structure comprises a steel pipe matrix, wherein an anti-corrosion layer, an adhesive layer and a light-cured protective layer are sequentially arranged outside the steel pipe matrix; the material of the anticorrosive layer is single-component epoxy paint. The anti-corrosion layer and the photo-curing protective layer are used in combination, so that the anti-corrosion performance is excellent, and meanwhile, the water absorption rate is small and the wet heat resistance is good; the epoxy coating with single component is adopted, so that the adhesive property with the surface of the steel pipe is good, the using temperature range is wide, and the site construction can be realized; the light-cured protective layer has the advantages of high mechanical strength and good impact resistance.
Description
Technical Field
The utility model relates to the technical field of oil pipeline corrosion prevention, in particular to a high-performance heat-bending elbow corrosion prevention structure.
Background
Buried steel pipelines are a main mode adopted by the petroleum and petrochemical industry at present for conveying oil and gas products, and are constrained by conditions such as topography along the pipeline, and hot bend pipes are required to be used for connection in pipeline construction. The hot bending pipe has the advantages that the control of the coating prefabrication process for the outer anti-corrosion layer on the operation line is complex and the production efficiency is low due to the special shape of the hot bending pipe; is easy to collide and strike in long-distance transportation; the anti-corrosion coating has the characteristics of small quantity and dispersion in the flat terrain, large quantity and concentrated use in the areas with relatively large fluctuation of the terrain and poor road conditions, and therefore, the outer anti-corrosion coating is required to have good wear resistance and impact resistance. The hot bending pipe can adopt corrosion-resistant structures such as sintered epoxy powder, liquid epoxy paint, polyethylene heat shrinkage belts, polyethylene composite belts and the like. The most commonly used external anti-corrosion layers of the current hot-bending pipe are a sintered epoxy powder coating and a solvent-free epoxy coating, and the defects mainly exist as follows:
(1) The sintered epoxy powder has excellent corrosion resistance, but has larger water absorption and limited wet heat resistance;
(2) The liquid epoxy coating has good adhesion with the surface of the steel pipe, the use temperature range is wide, and the field construction can be performed; but it has low mechanical strength and poor impact resistance.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a high-performance anti-corrosion structure for a hot bending pipe.
The technical scheme for solving the technical problems is as follows:
the utility model provides a high-performance anti-corrosion structure of a hot bend, which comprises a steel pipe matrix, wherein an anti-corrosion layer, an adhesive layer and a light-cured protective layer are sequentially arranged outside the steel pipe matrix; the material of the anticorrosive layer is single-component epoxy paint.
The beneficial effects of the utility model are as follows: the anti-corrosion layer and the light-cured protective layer are used in combination, so that the anti-corrosion protective layer can be widely applied to the hot bending pipe of the buried oil pipeline, is particularly suitable for the short-distance line redirection engineering, and has the special conditions of small quantity of hot bending pipes and incapability of being preserved and prefabricated in factories.
On the basis of the technical scheme, the utility model can be improved as follows.
Further, the thickness of the light-cured protective layer is greater than or equal to 2.5mm.
The adoption of the further scheme has the beneficial effects that the light-cured protective layer with the thickness has good protective effect, so that the anti-corrosion structure has better performance.
Further, the photocurable protective layer has an impact resistance greater than or equal to 24J.
The beneficial effect of adopting the further scheme is that the light-cured protective layer 4 has good impact resistance.
Further, the curing time of the photo-curing protective layer is less than or equal to 15 minutes.
The light-cured protective layer has the beneficial effects of being quick in curing time and convenient for construction operation.
Further, the light-cured protective layers are arranged along the axial direction of the steel pipe matrix in a multi-section mode, the edges of the two adjacent sections of light-cured protective layers are mutually overlapped, and the overlapping width is greater than or equal to 100mm.
The beneficial effect of adopting above-mentioned further scheme is, can effectively improve the guard action, prevents that the photocuring inoxidizing coating from appearing the gap.
Further, anchor lines are arranged on the outer surface of the steel pipe matrix.
The adoption of the further scheme has the beneficial effect that the anti-corrosion layer on the steel pipe matrix can be better attached to the steel pipe matrix by arranging the anchor lines.
Further, the depth of the anchor pattern is 40-100 μm.
The technical scheme has the beneficial effect of preventing the anchor lines from influencing the strength of the steel pipe body.
Further, the thickness of the anti-corrosion layer is greater than or equal to 800 μm.
The adoption of the further scheme has the beneficial effect that the strength of the anti-corrosion structure is further improved.
Further, the adhesive layer is epoxy nano-bonding primer or polyurethane nano-bonding primer.
Drawings
Fig. 1 is a schematic structural view of the high-performance heat-bending pipe corrosion prevention structure of the utility model.
In the drawings, the list of components represented by the various numbers is as follows:
1. a steel pipe substrate; 2. an anti-corrosion layer; 3. an adhesive layer; 4. and (3) a light-cured protective layer.
Detailed Description
The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
The utility model relates to a high-performance anti-corrosion structure of a hot bending pipe, which comprises a steel pipe matrix 1, wherein an anti-corrosion layer 2, an adhesive layer 3 and a light-cured protective layer 4 are sequentially arranged outside the steel pipe matrix 1; the material of the anticorrosive layer 2 is a single-component epoxy paint.
According to the high-performance anti-corrosion structure for the hot bending pipe, the anti-corrosion layer 2 and the light-cured protective layer 4 are used in a combined mode, the anti-corrosion performance is excellent, meanwhile, the water absorption rate is small, and the moisture and heat resistance is good; the epoxy coating with single component is adopted, so that the adhesive property with the surface of the steel pipe is good, the using temperature range is wide, and the site construction can be realized; the photo-curing protective layer 4 has the advantages of high mechanical strength and good impact resistance.
In the above embodiment, the material of the anticorrosive layer 2 is a solvent-free liquid epoxy coating.
In the above embodiment, it is preferable that the thickness of the photocurable protective layer 4 is greater than or equal to 2.5mm; the light-cured protective layer 4 with the thickness has good protective effect, so that the anti-corrosion structure has better performance.
In the above embodiment, it is preferable that the impact resistance of the photocurable protective layer 4 is 24J or more; the photocurable protective layer 4 has good impact resistance.
In the above embodiment, it is preferable that the curing time of the photo-curing protective layer 4 is less than or equal to 15 minutes; the light-cured protective layer 4 has a rapid curing time, and is convenient for construction operation.
The material of the light-curing protective layer 4 can be the existing light-curing material; the common material is vinyl resin, and is mixed with single-layer and double-layer 0-90 DEG fiber and friction-resistant ultraviolet curing modified epoxy glass fiber reinforced plastic of reinforcing agent.
In the above embodiment, it is preferable that the light-curing protective layers 4 are arranged in multiple segments along the axial direction of the steel pipe substrate 1, edges of two adjacent segments of light-curing protective layers 4 overlap each other, and the overlapping width is greater than or equal to 100mm; because the light-cured protective layer 4 is arranged section by section in the construction process, the edges of two adjacent light-cured protective layers 4 are mutually overlapped; the overlapping width of two adjacent sections of the light-cured protective layers 4 is set to be more than or equal to 100mm, so that the protective effect can be effectively improved, and gaps of the light-cured protective layers 4 are prevented.
In the above embodiment, it is preferable that the outer surface of the steel pipe substrate 1 is provided with anchor lines; by providing the anchor lines, the anticorrosive layer 2 on the steel pipe substrate 1 can be better attached to the steel pipe substrate 1.
In the above embodiment, it is preferable that the depth of the anchor pattern is 40 to 100 μm; the influence of the excessive depth of the anchor lines on the pipe body strength of the steel pipe matrix 1 is prevented.
In the above embodiment, it is preferable that the thickness of the anticorrosive layer 2 is 800 μm or more; the corrosion-resistant layer 2 with the thickness has better protective performance.
In the above embodiment, it is preferable that the thickness of the anticorrosive layer 2 is 800 μm or more.
In the above embodiment, the adhesive layer 3 is preferably an epoxy-based nanoadhesion primer or a polyurethane-based nanoadhesion primer.
The specific construction steps of the high-performance anti-corrosion structure of the hot bend pipeline are as follows:
(1) Cleaning burrs, sharp corners, layering or other surface defects on the steel pipe substrate 1, and polishing; removing grease or other dirt and impurities on the surface of the steel pipe matrix 1.
(2) The surface of the steel pipe matrix 1 is derusted by spraying or casting.
Before derusting, when the surface temperature of the steel pipe matrix 1 is 3 ℃ below the dew point temperature, hot air or other heating modes are adopted to expel moisture, and the preheating temperature is 40-60 ℃.
Spraying (throwing) rust removal on the outer surface of the steel pipe matrix 1, wherein the spraying (throwing) rust removal reaches the Sa2.5 grade specified in GB/T8923.1. The anchor grain depth of the surface of the steel pipe matrix 1 is 40-100 mu m.
(3) After spraying (throwing) to remove rust, cleaning and drying the outer surface of the steel pipe matrix 1 by using oil-free compressed air to remove floating ash and abrasive residues.
(4) The surface of the steel pipe matrix 1 is sprayed or brushed with the anticorrosive layer 2.
And (3) spraying solvent-free liquid epoxy paint on the surface of the steel pipe matrix 1 within 48 hours after the step (3) is finished, so that the steel pipe matrix forms the anticorrosive layer 2.
When the anticorrosive coating 2 is sprayed, a bi-component high-pressure airless spraying operation mode is specifically adopted, film is formed once, and the dry film thickness of the anticorrosive coating 2 is not less than 800 mu m.
(5) And (3) coating an adhesive layer 3 on the surface of the anti-corrosion layer 2.
(6) The outside of the adhesive layer 3 is coated with a light-cured protective layer 4.
The thickness of the light-cured protective layer 4 is more than or equal to 2.5mm, the impact resistance is more than or equal to 24J, and the curing time is less than or equal to 15min. The light-cured protective layers 4 are arranged along the axial direction of the steel pipe matrix 1 in a plurality of sections, the edges of two adjacent sections of light-cured protective layers 4 are mutually overlapped, and the overlap width is more than or equal to 100mm. The overlapping width of the light-cured protective layer 4 and the pipe body epoxy coating anti-corrosion layer is not less than 50mm.
The construction is completed, and the high-performance anti-corrosion structure of the hot bending pipe is obtained.
In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (7)
1. The high-performance anti-corrosion structure for the hot bending pipe comprises a steel pipe substrate (1) and is characterized in that an anti-corrosion layer (2) and an adhesive layer (3) are sequentially arranged outside the steel pipe substrate (1), and a light-cured protective layer (4) is arranged outside the adhesive layer (3); the material of the anticorrosive layer (2) is single-component epoxy paint; anchor lines are arranged on the outer surface of the steel pipe matrix (1); the depth of the anchor lines is 40-100 mu m.
2. The high-performance hot bend corrosion protection structure according to claim 1, characterized in that the thickness of the light-cured protective layer (4) is greater than or equal to 2.5mm.
3. The high-performance hot bend corrosion protection structure according to claim 2, wherein the light-cured protective layer (4) has an impact resistance greater than or equal to 24J.
4. A high performance hot bend corrosion protection structure according to claim 3, characterized in that the curing time of the light cured protective layer (4) is less than or equal to 15min.
5. The high-performance heat-bending pipe corrosion prevention structure according to any one of claims 1 to 4, wherein the light-cured protective layers (4) are arranged along the axial direction of the steel pipe substrate (1) in a multi-section manner, the edges of two adjacent light-cured protective layers (4) are mutually overlapped, and the overlapping width is greater than or equal to 100mm.
6. The corrosion protection structure for high performance hot bend pipe according to any one of claims 1 to 4, characterized in that the thickness of the corrosion protection layer (2) is greater than or equal to 800 μm.
7. The high-performance heat-bending pipe corrosion prevention structure according to any one of claims 1 to 4, wherein the adhesive layer (3) is an epoxy nano-adhesion primer or a polyurethane nano-adhesion primer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320021468.3U CN219712561U (en) | 2023-01-05 | 2023-01-05 | High-performance heat-bending elbow anti-corrosion structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320021468.3U CN219712561U (en) | 2023-01-05 | 2023-01-05 | High-performance heat-bending elbow anti-corrosion structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219712561U true CN219712561U (en) | 2023-09-19 |
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ID=88002353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320021468.3U Active CN219712561U (en) | 2023-01-05 | 2023-01-05 | High-performance heat-bending elbow anti-corrosion structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219712561U (en) |
-
2023
- 2023-01-05 CN CN202320021468.3U patent/CN219712561U/en active Active
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