CN112431992A - Pit defect repairing method for oil and gas pipeline - Google Patents
Pit defect repairing method for oil and gas pipeline Download PDFInfo
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- CN112431992A CN112431992A CN202011305737.6A CN202011305737A CN112431992A CN 112431992 A CN112431992 A CN 112431992A CN 202011305737 A CN202011305737 A CN 202011305737A CN 112431992 A CN112431992 A CN 112431992A
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- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/1686—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by winding a tape
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- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/175—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by using materials which fill a space around the pipe before hardening
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- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/18—Appliances for use in repairing pipes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention provides a pit defect repairing method for an oil and gas pipeline, which is reasonable in design, simple to operate, low in cost and good in repairing effect, and does not need fire. The method comprises the following steps of 1, pretreating the outer surface of a pit of the pipeline, removing an anticorrosive coating, cleaning and drying; step 2, coating polyurethane on the pit of the pipeline, and repairing until the surface of the defect part is smooth; step 3, winding aramid cloth at the position of the pipeline concave pit filled with the polyurethane; step 4, winding a plurality of layers of carbon fiber cloth on the surface of the aramid cloth in a staggered manner layer by layer; and 5, after the outermost layer of carbon fiber cloth is bonded, polishing and cleaning the surface of the pipeline for anti-corrosion treatment, and completing repair of pit defects of the pipeline. The method for repairing the pit defect of the pipeline by filling and winding the pipeline by using various composite materials provides theoretical guidance for the oil and gas pipeline pit repair design, and has important significance for optimizing the pipeline repair method, repairing the oil and gas pipeline defect and improving the pipeline operation safety.
Description
Technical Field
The invention relates to repair of an oil and gas pipeline, in particular to a method for repairing pit defects of an oil and gas pipeline.
Background
At present, pipeline transportation becomes one of the important ways for transporting oil and natural gas in China. The total mileage of the currently built oil and gas pipelines in China exceeds 12 kilometers, the scale of the oil and gas pipeline network in China reaches 24 kilometers by 2025 years, and the oil and gas pipelines occupy very important positions in national economic development. Part of the pipelines in service have been in service for 10 years, and reach 1/3-1/2 of the design life of the pipelines. Due to the reasons of service environment, geological conditions, stray current, construction defects, artificial damage of a third party and the like, a large number of pipelines have defects of different degrees and different types, and the method poses serious threats to the safe transportation and the personal and property safety of oil and gas pipelines.
Dishing is a common defect that causes oil and gas pipelines to fail because the pipelines are subjected to external crushing or impact. The recess seriously threatens the safe operation of the pipeline, and potential hazards are brought to the safe operation of the pipeline along with the change of time and pressure. Therefore, the proper repairing method is selected for repairing, and the method plays an important role in guaranteeing the safe operation of the oil and gas pipeline.
The repair method of the oil and gas pipeline is various, and the materials involved are also various. In addition, the in-service oil and gas pipelines in China basically take buried pipelines as the main parts, and because the regions where the buried long-distance pipelines pass have different climates and complex geological conditions, the pipe body defect repairing difficulty is high, and the technical requirement is high. Pipeline operators therefore increasingly place more emphasis on the choice of pipeline repair methods and repair materials.
Aiming at the problem of pipeline depression repair, the traditional method is to reinforce the pipeline depression by using an A-type sleeve or a B-type sleeve and then wind a composite material on the outer layer for repair.
When the oil and gas pipeline has pit defect, the repair mode of A-type sleeve is often adopted. The A-shaped sleeve is not required to be welded and is formed by combining two semicircular columnar pipes or two appropriately bent steel plates which are placed at the damaged part of the pipeline through side seam welding.
The installation process of the a-type sleeve is simpler than that of the B-type sleeve, but cannot be used for repairing circumferential defects. And because the A-shaped sleeve can not bear pressure, the A-shaped sleeve can only be used for the maintenance of non-leakage defects. In addition, the repair mode of the A-shaped sleeve is heavy, and the repaired pipe section is also heavy and thick.
The B-shaped sleeve is the same as the A-shaped sleeve in processing and positioning mode and consists of two half sleeves or two steel plates which are properly bent. Since the type B reinforcement sleeve needs to withstand the working pressure, unlike the type a reinforcement sleeve, the end must be welded to the pipe. Butt-welded edge welds are generally used. The B-shaped sleeve can repair circumferential defects, but is relatively complex to install, needs to be subjected to fire operation, is heavy in a B-shaped sleeve repairing mode, and is relatively thick and heavy in a repaired pipe section and relatively high in repairing price.
The two existing repairing modes are heavy and need to be subjected to fire operation, the repaired pipe section is thick and heavy, and the repairing price is relatively high.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the oil-gas pipeline pit defect repairing method which is reasonable in design, simple to operate, free of fire, low in cost and good in repairing effect.
The invention is realized by the following technical scheme:
a method for repairing pit defects of an oil and gas pipeline comprises the following steps,
step 4, winding a plurality of layers of carbon fiber cloth on the surface of the aramid cloth in a staggered manner layer by layer;
and 5, after the outermost layer of carbon fiber cloth is bonded, polishing and cleaning the surface of the pipeline for anti-corrosion treatment, and completing repair of pit defects of the pipeline.
Preferably, the specific steps of step 3 are as follows,
preparing impregnating resin and uniformly coating the impregnating resin on a pipe section to be pasted, wherein the middle of the pipe section is thick and the edge of the pipe section is thin when glue is coated;
and winding the aramid fabric at the coating position of the impregnating resin, rolling for multiple times along the fiber direction, and extruding bubbles to enable the impregnating resin to completely permeate the aramid fabric.
Further, the thickness of the daub is 1-3 mm.
Preferably, in step 3, the winding direction of the aramid cloth is perpendicular to the axial direction of the pipeline.
Preferably, the specific steps of step 4 are as follows,
uniformly coating liquid hot melt adhesive, spirally winding carbon fiber cloth at a coating position, alternately winding a plurality of layers of carbon fiber cloth and the axial direction of the pipeline at positive and negative inclination angles according to textures, wherein the length of a covering area along the axial direction of the pipeline is 4D, and D is the pipe diameter; and finishing the bonding of each layer after the hot melt adhesive is cooled, and then performing subsequent treatment.
Further, the carbon fiber cloth is alternately wound at an angle of plus or minus 45 degrees with the axial direction of the pipeline according to the texture.
Preferably, in step 4, four layers of carbon fiber cloth are wound on the surface of the aramid cloth layer by layer in a staggered manner.
Preferably, the thickness of the wound aramid cloth and the thickness of each layer of carbon fiber cloth are not less than 2 mm.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the method for repairing the pit defect of the oil and gas pipeline, polyurethane is used for filling the pipeline, and then aramid fabric and carbon fiber are used for winding the pipeline to achieve the purpose of repairing the pipeline. Compared with sleeve repair, the method completely uses composite materials for repair, avoids firing operation, ensures the operation safety of the pipeline and is more portable; the pipeline is wound at different angles, and the axial safety and the annular safety of the pipeline are ensured; compared with other carbon fiber repairing methods, the aramid fiber fabric matched with the design reduces the pipeline repairing cost and improves the cost performance. The method has strong universality, and technicians involved in oil and gas pipeline defect repair at first time or experienced technical experts can repair the pit defect according to the design of the method based on the basic geometric parameter information, so that the method has the universality and the applicability. Compared with the traditional defect repairing mode, the defect repairing method is lower in design and maintenance cost and easier to popularize and use.
Further, the method firstly fills the pipeline with polyurethane, and then winds the pipeline with aramid cloth and carbon fibers, wherein the axial direction of the pipeline in the winding direction respectively forms an included angle of 90 degrees, and an included angle of plus and minus 45 degrees. The annular and axial safety of the pipeline is considered at the same time, the aim of repairing is fulfilled, and the pipeline is more portable while the running safety of the pipeline is ensured; in addition, compared with other carbon fiber repairing methods, the aramid fiber fabric matched with the design reduces the pipeline repairing cost and improves the cost performance.
Drawings
FIG. 1 is a schematic axial cross-sectional view of a dimple repair as described in an example of the present invention.
Fig. 2 is a schematic cross-sectional view of pit repair as described in the examples of the present invention.
Fig. 3 is a schematic view showing the development direction of the pit repairing material according to the embodiment of the present invention.
In the figure: 1 is polyurethane; 2 is aramid fabric; 3 is a first layer of carbon fiber cloth; 4 is a second layer of carbon fiber cloth; 5 is a third layer of carbon fiber cloth; and 6, a fourth layer of carbon fiber cloth.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The method for repairing the pit defect of the oil and gas pipeline, disclosed by the invention, is a method for repairing the pit defect of the pipeline by filling and winding a plurality of composite materials for the pipeline, provides theoretical guidance for the pit repair design of the oil and gas pipeline, and has important significance for optimizing the pipeline repair method, repairing the defect of the oil and gas pipeline and improving the operation safety of the pipeline.
According to the method for repairing the pit defect of the oil and gas pipeline, disclosed by the invention, the pit defect is repaired by matching a plurality of composite materials, so that the fire operation is avoided compared with the sleeve repair, and the method is more portable while the running safety of the pipeline is ensured; compared with other carbon fiber repairing methods, the aramid fiber fabric matched with the design reduces the pipeline repairing cost and improves the cost performance. Before winding the composite material, polyurethane is used for filling and repairing. After the polyurethane fills the pits, a layer of aramid fabric is firstly used for winding the pipe body, and then carbon fiber is used for winding and repairing. The aramid fiber cloth is vertically wound when the pipeline is repaired. When the carbon fiber is used for repairing the pipeline, the carbon fiber is wound for multiple times according to the sequence that the carbon fiber and the pipeline form a positive 45-degree included angle and a negative 45-degree included angle.
Specifically, as shown in fig. 1, after repairing the defect of the oil and gas pipeline pit, as shown in fig. 2 and 3, 1 is polyurethane filling the pit, 2 is an aramid fiber cloth layer with a winding direction forming a 90-degree angle with the axial direction of the pipeline, 3 and 5 are first and third carbon cloth layers with a winding direction forming a positive 45-degree angle with the axial direction of the pipeline, and 4 and 6 are second and fourth carbon cloth layers with a winding direction forming a negative 45-degree angle with the axial direction of the pipeline. The pipe wall surface of the original repaired pipe is a pipe anticorrosive coating.
The invention mainly aims to solve the problem of repairing the pit defect of the oil-gas pipeline, so as to better repair the defect of the pipeline and ensure the service safety of the pipeline. The method of the invention is applied to the actual using process, as shown in fig. 1, fig. 2 and fig. 3, the whole flow comprises the following steps:
step 1: and (4) randomly selecting the pit defective pipe section, and determining the pipeline parameters which comprise the information of pipe diameter D, wall thickness t, transition length 4D and the like.
Step 2: and (3) preparing required repairing materials including polyurethane, aramid fabric, carbon fiber fabric and the like according to the geometric parameters such as the pipe diameter, the wall thickness, the transition length and the like determined in the step (1).
And step 3: removing an old anticorrosive layer and treating the surface of the base material. And the outer surface of the pipeline is pretreated before repair, and an anticorrosive coating is removed.
And 4, step 4: and (4) polishing the surface of the pipeline to meet the standard specification requirement, cleaning the surface of the pipeline and drying the surface of the pipeline.
And 5: and (4) coating polyurethane on the pit, and repairing until the surface of the defect part is smooth.
Step 6: and winding aramid fabric after filling and leveling the polyurethane. Preparing impregnating resin and uniformly coating the impregnating resin on a pipe section to be pasted, wherein the thickness of the coating is 1-3mm, and the middle part is thick and the edge is thin. Rolling for several times along the fiber direction to extrude out bubbles, so that the aramid fabric is completely soaked by the impregnating resin. The aramid fiber is wound in a direction perpendicular to the axial direction of the pipeline.
And 7: and winding a first layer of carbon fiber cloth. Liquid hot melt adhesive is uniformly coated on the surface of aramid fiber cloth, then the carbon fiber cloth is spirally wound on the aramid fiber cloth, the texture of the carbon fiber cloth forms a positive 45-degree angle with the axial direction of the pipeline, and the length of a covering area along the axial direction of the pipeline is 4D. After winding, the carbon fiber cloth and the aramid fiber cloth are tightly pressed, and after the hot melt adhesive is cooled, bonding is finished.
And 8: and winding a second layer of carbon fiber cloth. And uniformly coating the liquid hot melt adhesive on the surface of the first layer of carbon fiber cloth, and then spirally winding the second layer of carbon fiber cloth on the aramid fabric, wherein the texture of the aramid fabric and the axial direction of the pipeline form an angle of minus 45 degrees, and the length of the coverage area along the axial direction of the pipeline is 4D. After winding, the second layer of carbon fiber cloth and the first layer of carbon fiber cloth are tightly pressed, and after the hot melt adhesive is cooled, bonding is finished.
And step 9: and winding a third layer of carbon fiber cloth. And uniformly coating the liquid hot melt adhesive on the surface of the second layer of carbon fiber cloth, and then spirally winding the third layer of carbon fiber cloth on the aramid cloth, wherein the texture of the aramid cloth forms a positive 45-degree angle with the axial direction of the pipeline, and the length of the coverage area along the axial direction of the pipeline is 4D. And after winding is finished, pressing the third layer of carbon fiber cloth and the second layer of carbon fiber cloth tightly, and waiting for the cooling of the hot melt adhesive to finish bonding.
Step 10: winding the carbon fiber cloth at the outermost layer. And uniformly coating the liquid hot melt adhesive on the surface of the third layer of carbon fiber cloth, and then spirally winding the outermost layer of carbon fiber cloth on the aramid fabric, wherein the texture of the aramid fabric and the axial direction of the pipeline form an angle of minus 45 degrees, and the length of the coverage area along the axial direction of the pipeline is 4D. And after winding is finished, pressing the outermost layer of carbon fiber cloth and the third layer of carbon fiber cloth tightly, and waiting for the cooling of the hot melt adhesive to finish bonding.
Step 11: and (5) corrosion prevention of the repair layer and backfilling. And polishing and cleaning the surface of the pipeline, performing anti-corrosion treatment and backfilling in time.
Wherein the thickness of the wound aramid fabric and each layer of carbon fiber fabric is not less than 2mm
The invention improves the defects of heavy repair technical method, thick and heavy repaired pipe section and the like of the existing casing pipe repair technology, uses composite materials for filling and winding to achieve the purpose of pipe section repair, enables the repair process to be easier to operate, and enables the repaired pipe section to be firmer. Compared with the casing pipe repairing technology, the method is safer and more convenient. The traditional sleeve repairing method needs to carry out firing operation, is more complex in operation, can possibly increase potential safety hazards, has higher welding requirements, and even deepens defects if the repairing fails to reach the standard and has quality problems. The invention totally adopts the composite material for repair without fire operation, thereby being safer and more convenient. The method has strong universality, and technicians involved in oil and gas pipeline defect repair work at first time or experienced technical experts can repair pipeline pits according to the design method provided by the invention according to the basic geometric parameter information, so that the method has the advantages of universality and applicability. The pipeline sunken repairing method adopts multiple composite materials to repair the pipeline sunken part, has low cost, good repairing effect and higher cost performance, and is easier to popularize and use.
Claims (8)
1. A pit defect repairing method for an oil and gas pipeline is characterized by comprising the following steps,
step 1, pretreating the outer surface of a pipeline pit, removing an anticorrosive coating, cleaning and drying;
step 2, coating polyurethane on the pit of the pipeline, and repairing until the surface of the defect part is smooth;
step 3, winding aramid cloth at the position of the pipeline concave pit filled with the polyurethane;
step 4, winding a plurality of layers of carbon fiber cloth on the surface of the aramid cloth in a staggered manner layer by layer;
and 5, after the outermost layer of carbon fiber cloth is bonded, polishing and cleaning the surface of the pipeline for anti-corrosion treatment, and completing repair of pit defects of the pipeline.
2. The method for repairing the pit defect of the oil and gas pipeline as claimed in claim 1, wherein the step 3 comprises the following steps,
preparing impregnating resin and uniformly coating the impregnating resin on a pipe section to be pasted, wherein the middle of the pipe section is thick and the edge of the pipe section is thin when glue is coated;
and winding the aramid fabric at the coating position of the impregnating resin, rolling for multiple times along the fiber direction, and extruding bubbles to enable the impregnating resin to completely permeate the aramid fabric.
3. The method for repairing the pit defect of the oil and gas pipeline as claimed in claim 2, wherein the thickness of the daub is 1-3 mm.
4. The method for repairing the pit defect of the oil and gas pipeline as claimed in claim 1, wherein in the step 3, the winding direction of the aramid cloth is perpendicular to the axial direction of the pipeline.
5. The method for repairing the pit defect of the oil and gas pipeline as claimed in claim 1, wherein the specific steps of step 4 are as follows,
uniformly coating liquid hot melt adhesive, spirally winding carbon fiber cloth at a coating position, alternately winding a plurality of layers of carbon fiber cloth and the axial direction of the pipeline at positive and negative inclination angles according to textures, wherein the length of a covering area along the axial direction of the pipeline is 4D, and D is the pipe diameter; and finishing the bonding of each layer after the hot melt adhesive is cooled, and then performing subsequent treatment.
6. The method of repairing a pit defect in an oil and gas pipeline as claimed in claim 5, wherein the carbon fiber cloth is alternately wound at an angle of plus or minus 45 degrees with respect to the axial direction of the pipeline according to the texture.
7. The method for repairing the pit defect of the oil and gas pipeline as claimed in claim 1, wherein in step 4, four layers of carbon fiber cloth are wound on the surface of the aramid cloth in a staggered manner layer by layer.
8. The method for repairing the pit defect of the oil and gas pipeline as claimed in claim 1, wherein the thickness of the wound aramid fabric and each layer of carbon fiber fabric is not less than 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011305737.6A CN112431992A (en) | 2020-11-19 | 2020-11-19 | Pit defect repairing method for oil and gas pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011305737.6A CN112431992A (en) | 2020-11-19 | 2020-11-19 | Pit defect repairing method for oil and gas pipeline |
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| CN112431992A true CN112431992A (en) | 2021-03-02 |
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| CN202011305737.6A Pending CN112431992A (en) | 2020-11-19 | 2020-11-19 | Pit defect repairing method for oil and gas pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115111464A (en) * | 2022-06-07 | 2022-09-27 | 西安石油大学 | Supercritical CO containing impurities 2 Crack arrest control method for conveying pipeline |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1616546A (en) * | 2004-09-30 | 2005-05-18 | 北京科技大学 | Strengthening carbon fiber composite material and method for repairing defective pipeline |
| CN101204770A (en) * | 2007-01-15 | 2008-06-25 | 北京安科管道工程科技有限公司 | Pressure structure clamp and fiber compound material combination expander technology |
| CN101206000A (en) * | 2007-01-18 | 2008-06-25 | 北京安科管道工程科技有限公司 | Method for renovation and reinforcement of pipe using basalt fibre complex material |
| CN101205999A (en) * | 2007-01-15 | 2008-06-25 | 北京安科管道工程科技有限公司 | Renovation reinforcement, reinforced and/or crack arrest technique for pipe |
| CN104371272A (en) * | 2014-11-04 | 2015-02-25 | 中国石油天然气股份有限公司 | Pipeline reinforcement material system and reinforcement method |
| CN105670556A (en) * | 2016-02-26 | 2016-06-15 | 北京天诚宇新材料技术有限公司 | Carbon fiber reinforcement technology for corrosion and protection of petrochemical device |
-
2020
- 2020-11-19 CN CN202011305737.6A patent/CN112431992A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1616546A (en) * | 2004-09-30 | 2005-05-18 | 北京科技大学 | Strengthening carbon fiber composite material and method for repairing defective pipeline |
| WO2006034653A1 (en) * | 2004-09-30 | 2006-04-06 | University Of Science & Technology Beijing | Carbon fiber composite for repairing and reinforcing pipelines having defects and the method of application |
| CN101204770A (en) * | 2007-01-15 | 2008-06-25 | 北京安科管道工程科技有限公司 | Pressure structure clamp and fiber compound material combination expander technology |
| CN101205999A (en) * | 2007-01-15 | 2008-06-25 | 北京安科管道工程科技有限公司 | Renovation reinforcement, reinforced and/or crack arrest technique for pipe |
| CN101206000A (en) * | 2007-01-18 | 2008-06-25 | 北京安科管道工程科技有限公司 | Method for renovation and reinforcement of pipe using basalt fibre complex material |
| CN104371272A (en) * | 2014-11-04 | 2015-02-25 | 中国石油天然气股份有限公司 | Pipeline reinforcement material system and reinforcement method |
| CN105670556A (en) * | 2016-02-26 | 2016-06-15 | 北京天诚宇新材料技术有限公司 | Carbon fiber reinforcement technology for corrosion and protection of petrochemical device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115111464A (en) * | 2022-06-07 | 2022-09-27 | 西安石油大学 | Supercritical CO containing impurities 2 Crack arrest control method for conveying pipeline |
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Application publication date: 20210302 |