WO2006034653A1 - Composite de fibre de carbone permettant de reparer et de renforcer les conduites presentant des defectuosites et procede d'application - Google Patents

Composite de fibre de carbone permettant de reparer et de renforcer les conduites presentant des defectuosites et procede d'application Download PDF

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Publication number
WO2006034653A1
WO2006034653A1 PCT/CN2005/001607 CN2005001607W WO2006034653A1 WO 2006034653 A1 WO2006034653 A1 WO 2006034653A1 CN 2005001607 W CN2005001607 W CN 2005001607W WO 2006034653 A1 WO2006034653 A1 WO 2006034653A1
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WO
WIPO (PCT)
Prior art keywords
carbon fiber
repairing
reinforcing
weight
pipelines
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Application number
PCT/CN2005/001607
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English (en)
Chinese (zh)
Inventor
Minxu Lu
Yufang Zhang
Shaohua Dong
Aitian Ge
Yingfeng Chen
Baorui Li
Guoan Zhang
Original Assignee
University Of Science & Technology Beijing
Priority date (The priority date 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 date listed.)
Filing date
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Application filed by University Of Science & Technology Beijing filed Critical University Of Science & Technology Beijing
Publication of WO2006034653A1 publication Critical patent/WO2006034653A1/fr

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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
    • 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
    • F16L55/1683—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of a patch which is fixed on the wall of the pipe by means of an adhesive, a weld or the like

Definitions

  • the invention relates to a technology for repairing and reinforcing a defect-containing pipeline, in particular a metal pipeline, by using a resin-based carbon fiber composite material, and more particularly, the invention relates to a reinforcement for repairing and reinforcing a pipeline containing defects, in particular, a pipeline containing defects
  • the material is a resin-based carbon fiber composite material, a method for repairing and reinforcing pipeline defects by the material, and the application of the material and method in repairing and reinforcing defects of oil and gas transmission pipelines.
  • Oil and gas pipeline transportation is one of the five major transportation industries. At present, China's oil and gas long-distance pipelines have reached more than 30,000 kilometers. During long-term service, these pipelines are affected by formation pressure, soil corrosion, galvanic corrosion, external force damage, etc., causing accidents such as pipe bursts and leaks, which affect the normal transportation of pipelines. There are often oil and gas pipeline blasting and leakage accidents at home and abroad. For example, in 1989, there were 1024 casualties in the Ural gas pipeline of the former Soviet Union. In North America, a 13-kilometer accident occurred in the gas pipeline. A large number of on-site investigations have shown that more than 60% of the oil and gas pipelines in service in China have entered the accident-prone period.
  • the composite material reinforcement technology of American Clockspring Company is a composite sheet of isophthalic acid unsaturated polyester and E-glass fiber, which is wrapped on the surface of metal pipe by dry laying, between layers. Bonded with an epoxy adhesive.
  • This technology There are two disadvantages of this technology: First, during the construction process, there is no guarantee that the composite sheet and the tube body, the composite sheet layer and the layer are closely adhered; the other is the elastic modulus and strength of the glass fiber. Low, so the thickness of the reinforcing layer will be thicker, which will cause certain difficulties for subsequent corrosion protection, and the improvement of the bearing capacity of the substrate is also limited.
  • Carbon fiber is known for its high strength and high modulus of elasticity, and is most suitable for use as a reinforcing material.
  • Table 1 shows the performance comparison of carbon fiber cloth, carbon fiber resin composite material and X60 pipeline steel.
  • the elastic modulus of the resin-based carbon fiber composite is equal to or greater than 210Gpa, which is very close to the elastic modulus of steel 207GPa, which is very beneficial to the co-deformation of carbon fiber composite and steel, which is beneficial to the load between steel and carbon fiber composite. Evenly distributed, which is beneficial to achieve the reinforcing effect.
  • Resin-based carbon fiber composites have a sufficient amount of deformation greater than 1.4%. In general, the deformation of the pipe body is much smaller than the deformation of the carbon fiber composite material, and the reinforcement using the carbon fiber composite material is sufficiently safe from the viewpoint of the deformation of the pipe body.
  • the strength of carbon fiber reinforced materials is an order of magnitude greater than that of glass fibers, which allows thinner carbon fiber composites to achieve the reinforcement of thick glass fiber reinforced materials.
  • the object of the present invention is to develop a new technology for using carbon fiber for reinforcing pipelines, especially metal pipelines.
  • the specific strength and specific modulus of the reinforcing materials used are close to the metal pipe materials, and the construction process is simple, and Conducive to the tightness between the reinforcing material and the pipe body, between the reinforcing layer and the layer Tight fit, it can be integrated with the pipe to jointly carry the pressure inside the pipe, and the ultimate composite repair layer can meet the pressure capacity of the original pipe.
  • the technology of the invention can carry out the reinforcing operation without stopping the pipeline, does not require large mechanical lifting equipment during the construction process, does not need welding or cutting pipelines, has low construction space requirements, and has corrosion resistance, aging resistance, etc. advantage.
  • An object of the present invention is to provide a resin-based carbon fiber composite material for repairing and reinforcing a defective pipe, particularly a metal pipe, comprising a carbon fiber sheet and a special resin of the present invention.
  • Another object of the present invention is to provide a reinforcing material for repairing and repairing a defect-containing pipe, the material comprising a plurality of layers of the resin-based carbon fiber composite material, and one or more of the resin-based carbon fiber composite materials.
  • Extra-layer anti-corrosion material is added to provide a reinforcing material for repairing and repairing a defect-containing pipe, the material comprising a plurality of layers of the resin-based carbon fiber composite material, and one or more of the resin-based carbon fiber composite materials.
  • pipe refers to pipes made of various materials, particularly metal pipes, such as steel pipes.
  • carbon fiber sheet includes carbon fiber sheets made of various raw materials, such as carbon fiber cloth.
  • the carbon fiber sheet used in the present invention has a modulus of elasticity in the range of
  • resin-based carbon fiber composite material refers to a material in which a carbon fiber and a resin are composite-cured.
  • the material for repairing and reinforcing the defect-containing pipe of the present invention comprises a resin-based carbon fiber composite material and an outer anti-corrosion material.
  • the resin-based carbon fiber composite material includes a carbon fiber sheet and a special supporting resin.
  • the special accessory resin of the invention comprises two kinds of repair glue and adhesive glue.
  • the repairing glue is used for the filling and repairing of the damage defects outside the pipeline; the adhesive dipping is used for infiltrating the carbon fiber sheet, and the bonding between the carbon fiber and the pipe body and between the carbon fiber sheets.
  • Repair glue and adhesive dipped rubber can be divided into winter and summer. Winter and summer formulations are slightly different and can usually be achieved by adjusting the amount of curing accelerator. When the ambient temperature is lowered, the amount of the curing accelerator can be appropriately increased.
  • the repairing glue consists of two components, A and B.
  • the ratio of the two components is 2:1.
  • a component includes:
  • Part B includes:
  • the curing agent of (E) in the component B may be, for example, a modified aliphatic amine such as diethylenetriamine glyceryl n-butyl ether (e.g., commercial 593) or a phenolic modified polyamine (e.g., commercial T31).
  • a modified aliphatic amine such as diethylenetriamine glyceryl n-butyl ether (e.g., commercial 593) or a phenolic modified polyamine (e.g., commercial T31).
  • the repairing glue can be prepared by mixing and storing the components A and B of the matching resin separately. Weigh accurately according to the specified ratio before use, put it into the container, and mix it with a stirrer. The amount of glue applied should be used up within the available time.
  • the adhesive dipping consists of two components, A and B.
  • the ratio of the two components is preferably (3 ⁇ 4): 1.
  • a component includes:
  • Part B includes:
  • the epoxy resin of the component (A) may be a bisphenol A epoxy resin or a vinyl modified epoxy resin; the curing agent of the component B (E) may be a modified aliphatic amine such as diethylene. Triaminoglycerin n-butyl ether (e.g., commercial 593) or phenolic modified polyamine (e.g., commercial T31).
  • the adhesive dipping can be prepared as follows: the components A and B of the matching resin are separately mixed and stored, accurately weighed according to the prescribed ratio before use, and then placed in a container, and uniformly mixed with a stirrer. The amount of glue applied should be used up within the available time.
  • the resin-based carbon fiber composite material for repairing and reinforcing the defect-containing pipeline of the present invention comprises the following materials:
  • a multi-layer carbon fiber sheet in which a carbon fiber sheet is coated with a glue dipped, and the carbon fiber sheet layers are alternately laid at an angle as needed.
  • the present invention also provides a reinforcing material for repairing and repairing a defect-containing pipe, the material comprising a plurality of layers of the resin-based carbon fiber composite material, wherein each layer of the resin-based carbon fiber composite material is placed along a radial or circumferential direction of the pipe, Adjacent two layers of composite material may be laid in parallel, perpendicular or at an angle.
  • the reinforcing material also includes a multilayer outer anticorrosive material located outside of the resin-based carbon fiber composite.
  • the outer anticorrosive material is in principle the same as the original outer anticorrosive material that needs to be reinforced.
  • a commonly used external anti-corrosion material is a polyethylene cold-wound adhesive tape, and the thickness of the polyethylene adhesive tape is 0.7mn! ⁇ 2.0mm is suitable; tensile strength is better than ISMpa.
  • Another object of the present invention is to provide a method for repairing and reinforcing a defective pipe, particularly a defective metal pipe, using the material of the present invention, which has good construction safety and performance superiority.
  • Another object of the present invention is to provide a repairing and reinforcing material and method for damage defects outside the oil and gas pipeline, that is, a technique for repairing and reinforcing the damage of the oil and gas pipeline by using the materials and methods described above.
  • the method for repairing and repairing a pipeline, such as an external damage defect of an oil and gas metal pipeline, using the material of the present invention includes the following steps:
  • the carbon fiber cloth is pasted according to a certain size and number of layers, and the resin-based carbon fiber composite material layers are placed along the radial or circumferential direction of the pipe as needed, so that the adjacent two layers of the composite material are parallel, perpendicular or at an angle. Staggered laying. Wherein the carbon fiber cloth is brushed or impregnated with the adhesive of the present invention;
  • the surface of the bonded carbon fiber composite material is entangled with a polyethylene cold wrap tape.
  • the pipe Before implementing the method, the pipe must be surface-cleaned first, and the surface of the pipe, such as honeycomb, pockmark, small hole, near the weld, etc., should be repaired with a repairing glue, that is, the repaired putty is smoothed and smoothed, and the surface is smoothed to the surface. If there are still irregularities, it should be smoothed with sandpaper.
  • a repairing glue that is, the repaired putty is smoothed and smoothed, and the surface is smoothed to the surface. If there are still irregularities, it should be smoothed with sandpaper.
  • the carbon fiber cloth is pasted by wet bonding, that is, the carbon fiber cloth is first brushed or impregnated with the epoxy resin adhesive of the present invention, and then entangled and reinforced.
  • the longitudinal and transverse overlap of the carbon fiber sheets should be kept to a certain length.
  • the anti-corrosion repair of the work area should be carried out after the adhesive surface of each adhesive surface in the reinforcing work area is dried.
  • the overlapping width of the wound layer and the original anti-corrosion layer should be kept a certain length. When wrapped around 3 ⁇ 4, the edges of the tape should be parallel and should not be twisted.
  • Fig. 1 is a schematic diagram of a pipe and a defect for a blasting test, in which a defect is a part for repairing and reinforcing, and a defect is a part for comparison without repairing and reinforcing.
  • Figure 2 is a pressure-time diagram of the hydraulic burst test.
  • Figure 3 is a photograph of the shape of the reinforcing part in the burst test. It can be seen from the photograph that the pipe on both sides of the reinforcing part under pressure is bulged, and there is no change in the reinforcing part.
  • Fig. 4 is a photograph showing the appearance of the mechanical scratch of the pipe of the embodiment 2.
  • Fig. 5 is a photograph showing the appearance of the defect of the external force of the pipe of the embodiment 2.
  • Figure 6 is a photograph of the appearance of the pipe after repairing in Example 2.
  • Example 1 Evaluation of the technical solution of the present invention by a water blasting test method
  • the ⁇ 660 gas pipeline is taken as an example to simulate the defect size that may exist in the gas pipeline, and the technology is evaluated by the water pressure burst test method.
  • the test tubes and defects are shown in Figure 1. The test process is as follows:
  • a defect of 50 mm X 30 mm X 4 mm (defect 1) was made at the portion where the anti-corrosion layer was peeled off, and the defect was repaired and reinforced by the technique of the present invention (see Example 2).
  • a defect of 50 mm X 30 mm X 2.0 mm (defect 2) was made in another part of the test tube, and this defect was not reinforced.
  • the test tube is filled with water and vented, and when the test sample is filled with water and does not leak, the pressure is gradually increased until the sample is broken.
  • the pressurization process is shown in Figure 2.
  • the results of the blasting test show that: the damage is generated at the small defect (defect 2) which is not repaired and reinforced, and the damage is typical tear-type damage; the test tube has obvious expansion phenomenon, and the repaired and reinforced defect There is no obvious change at the place. Under the pressure, the test tube on both sides of the reinforcing part is bulged, resulting in obvious expansion (see Figure 3).
  • the blasting pressure of the reinforced tube is 16.4Mpa, which is much higher than the design work of the sample.
  • the pressure (6.4 Mpa) indicates that the technology has reached the goal of reinforcement.
  • Example 2 Repair and reinforcement of natural gas pipeline defects 01607
  • the field embodiment of the present invention is an example of defect reinforcement applied to the Shaanxi-Beijing gas pipeline.
  • the defect is reinforced by the reinforcing material and the repair and reinforcement method according to the present invention.
  • the specific implementation process is as follows:
  • the defect of reinforcement construction is located somewhere in Shaanxi section of Shaanxi-Beijing pipeline. It is located at the edge of the desert. It is a sandy soil structure. The surface water layer is shallow. The depth of the pipeline is about 1300mm, and the surface temperature of the tube is about 40°C. There are three mechanical damages in the pipe body. One is an obvious mechanical scratch, 150mm long, 3.5mm deep, 20mm deepest at the deepest point (see Figure 4); the other two are bumps, 1.5mm deep and 20mm long (see Figure 5).
  • the surface cleaning of the pipeline for example, the result of surface treatment should be such that the quality of the pretreatment of the base layer reaches the St3 level specified in the national standard GB/T8923-1988.
  • the adhesive preparation and the repairing glue are prepared according to the preparation method described above and the formulation described in Table 3, and then the epoxy resin adhesive is applied to the carbon fiber cloth (the amount of the adhesive is shown in Table 3), and the same is used. Wound reinforcement.
  • the number and direction of winding of the carbon fiber cloth are two layers in the circumferential direction, one in the axial direction, two in the circumferential direction, one in the axial direction, and two in the circumferential direction, and a total of eight layers.
  • the anti-corrosion repair should be carried out after the adhesive surface of each adhesive surface in the reinforcing work area is dried.
  • the outer anticorrosive material used is a polyethylene adhesive tape wrapped around one layer.
  • the overlapping width of the wound layer and the original anti-corrosion layer should be not less than 100 mm.
  • the length of the adhesive tape at the beginning and end of the adhesive tape shall be not less than 1/4 of the pipe circumference and not less than 100 mm. When entangled, the edges of the adhesive tape should be parallel and the wrinkles should not be twisted.
  • the pipe segment described in this embodiment has been below the design working pressure due to the existence of the defect.
  • N2005/001607 operation which invisibly increases the running cost of the pipeline; after the repair and reinforcement, the operating pressure can be increased to the design level.
  • the present invention is a new matching technology suitable for pipeline repair and reinforcement, and is suitable for damage of damaged pipelines caused by corrosion, mechanical or other reasons for different pipe diameters.
  • the construction process does not require pipeline shutdown, and the reinforcing material can be tightly wrapped around the pipeline, which has little effect on the increase of the pipeline's own weight. It can be integrated with the pipe to jointly carry the pressure inside the pipe and make the pressure capacity of the repaired pipe reach and exceed the pressure capacity of the original pipe.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pipe Accessories (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un matériau permettant de réparer et de renforcer les conduites métalliques, en particulier les conduites présentant des défectuosités, ainsi qu'un procédé de réparation et de renforcement de conduites défectueuses faisant appel au matériau décrit. Ce matériau de réparation et de renforcement comprend (1) une couche d'adhésif de réparation qui peut servir à boucher et à réparer les défectuosités sur l'extérieur des conduites, une couche de feuilles de fibre de carbone imprégnées ou revêtues d'un adhésif d'imprégnation, et pouvant être utilisées dans les zones défectueuses pour restaurer les conduites et augmenter leur résistance à la charge, et (3) une couche de matériau de protection qui peut être appliqué sur la surface externe. Ce matériau de renforcement, qui peut se combiner avec les conduites de manière former une partie solidaire de celles-ci, afin de supporter la pression présente dans les conduites, présente une résistance spécifique et un module spécifique proches de ceux des conduites métalliques, de sorte que la résistance à la charge des couches de réparation combinées terminées peut égaler voire dépasser la résistance à la charge des conduites d'origine. Le procédé décrit permet de former de manière simple et avantageuse des jonctions étanches entre le matériau de renforcement et les conduites, et entre les couches de renforcement. En outre il permet d'effectuer l'opération de renforcement pendant l'exploitation normale des conduites.
PCT/CN2005/001607 2004-09-30 2005-09-29 Composite de fibre de carbone permettant de reparer et de renforcer les conduites presentant des defectuosites et procede d'application WO2006034653A1 (fr)

Applications Claiming Priority (2)

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CN200410080359.0 2004-09-30
CN 200410080359 CN1276024C (zh) 2004-09-30 2004-09-30 含缺陷管道修复补强的碳纤维复合材料和方法

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Publication number Priority date Publication date Assignee Title
WO2009052439A2 (fr) 2007-10-17 2009-04-23 Elan Pharma International Limited Régimes immunothérapeutiques dépendant du statut de l'apoe
CN110514496A (zh) * 2019-09-02 2019-11-29 卡本科技集团股份有限公司 一种碳纤维网格加固混凝土梁端部的锚固试验方法
CN110514496B (zh) * 2019-09-02 2022-07-12 卡本科技集团股份有限公司 一种碳纤维网格加固混凝土梁端部的锚固试验方法
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CN114479579A (zh) * 2022-03-08 2022-05-13 石狮华宝新材料工程有限公司 一种重防腐管道修补用光固化复合片材及管道修补工艺

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