CN101206000A - Method for renovation and reinforcement of pipe using basalt fibre complex material - Google Patents
Method for renovation and reinforcement of pipe using basalt fibre complex material Download PDFInfo
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- CN101206000A CN101206000A CNA2007100011133A CN200710001113A CN101206000A CN 101206000 A CN101206000 A CN 101206000A CN A2007100011133 A CNA2007100011133 A CN A2007100011133A CN 200710001113 A CN200710001113 A CN 200710001113A CN 101206000 A CN101206000 A CN 101206000A
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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
- F16L55/1683—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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Pipe Accessories (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relate to a method applicable to pipeline, in particular to a method of repairing reinforcing or strengthening a metallic pipe. The main materials used in the invention are basalt fiber reinforcing material and resin basis material. According to the invention, as the strength and the modulus of reinforcing or strengthening materials are similar with those of the metallic pipe body material, the materials used in the invention can be integrated with the pipe body into a whole to bear pressure in the pipe together and finally form a bearing capacity of a composite repairing layer reaching or exceeding the bearing capacity of the original pipe; as the basalt fiber material is insulating, the compatibility between the pipe and cathodic protection and the electrochemical corrosion resistant capacity of the pipe are greatly improved. The method provided by the invention which has simple construction not only facilitates the close attaching between the reinforcing material and the pipe body and between reinforcing layers, but also enables repairing reinforcing and strengthening operations on pipelines in active service.
Description
Invention field
The present invention relates to the resin base basalt fiber composite material pipeline, particularly metallic conduit carries out renovation reinforced and/or technique for enhancing, more specifically, the present invention relates to pipeline, the renovation reinforced reinforcing material of metallic conduit particularly, this material is the resin base basalt fiber composite material, with described material defect of pipeline is carried out renovation reinforced method, and the application in pipe-line defective renovation reinforced of described material and method.
Background technique
The oil and gas pipes transportation is one of five big transportatioies industry, kilometer surplus only China's oil gas long distance pipeline just reaches 30,000 at present.These pipelines owing to be subjected to effects such as strata pressure, soil corrosion, galvanic corrosion, external force damage, cause accidents such as pipeline burst, leakage to take place in the long service process; Perhaps owing to carry the raising that requires, existing conveying capacity deficiency or designed capacity deficiency, pressure-raising on request; Perhaps because the regional classification of pipeline process changes, when Security had requirements at the higher level, these all influenced the normal conveying operation of pipeline.Often there are oil and gas pipes explosion and leakage accident to take place both at home and abroad, as 1989, injures and deaths 1024 people of former Soviet Union's Ural gas pipeline explosion; The major break down of 13 kilometers of gas pipeline primary blasting crackings also once took place in the North America.Lot of site shows that China has entered the multiple phase of accident at the labour oil-gas pipeline more than 60%.Usually, defective pipe-line is often taked the way of step-down conveying when running job; Carry to require improve or pipeline area classification changes, and existence conditions be can not satisfy the time, major part is to keep existing situation, newly-built at a puss pipeline.So not only influence normal manufacturing operation, and increased operating cost greatly.Therefore develop a kind of effective, safe, be convenient to implement pipeline is carried out method renovation reinforced and that strengthen is the target that pursue related domain.Outside existing oil and gas pipes, in the defect repair reinforcement technology, mainly contain traditional welding and mend methods such as scar and composite material reinforcement.Because the danger that burn-through might take place and produce hydrogen embrittlement in the scar process is mended in welding, for the gas transmission line of stopping transportation not, the method is not adopted in general recommendations especially.And polymer matrix composites are used for pipeline strength rehabilitation by external oily company owing to have high-strength light, anticorrosive, good endurance, easy construction, do not influence the excellent specific properties such as outward appearance of structure.As the composite material reinforcement technology of U.S. Clockspring company, it is to adopt M-phthalic acid type unsaturated polyester and E-glass fibre to be combined into sheet material, adopts dried shop method to be wrapped in the metallic conduit surface, bonds with epoxy adhesive between layer and layer.The shortcoming of this technology has two: the one, in the work progress, can't guarantee fitting tightly between composite sheet and body, composite sheet layer and the layer; Another is that the Young's modulus and the intensity of glass fibre is all lower, and is so the thickness of strengthening course can be thicker, to follow-up anticorrosion certain difficulty that causes, also very limited to the raising degree of matrix bearing capacity.And the composite material reinforcement technology of exploitation such as University of Science ﹠ Technology, Beijing is higher because of cost, and raw material is not easy to obtain and because factors such as the basic dependence on import fully of carbon fibre precursor also need further perfect.
Do not have report and open specific embodiment in recent years about using basalt fibre to carry out pipeline maintenance reinforcement and enhancing.
Basalt fibre is a kind of inorfil of former Soviet Union's exploitation, be to be that raw material is founded the fiber that forms with the natural basalt ore, have the tensile strength height, good characteristic such as Young's modulus is big, electrical insulating property good, corrosion-resistant and chemical stability is good, and can under 600 ℃ or higher temperature, use, its performance is better than common glass fibre comprehensively.Because do not have boron and otheralkali metal oxide to discharge in the basalt melt process, make the manufacture process environmental sound of basalt fibre, no industrial refuse not to the airborne release harmful gas, is novel environmental protection fiber.
Basalt fibre domesticizes at present, and cost is far below carbon fiber, has been applied to fibre reinforced cement goods, road surface geotechnique's barrier, automobile with fields such as friction materials.
Summary of the invention
The purpose of this invention is to provide and a kind ofly pipeline is carried out method renovation reinforced and/or that strengthen with basalt fiber composite material, it is characterized in that laying basalt fiber composite material in position renovation reinforced at the pipeline needs and/or that strengthen, this method cost is lower, safe and reliable, is convenient to construction.Because basalt fibre volume resistivity and surface resistivity are all greater than 10
10Ω m has excellent electric insulating energy and fire retardant, and therefore, basalt fiber composite material can be used as the isolation layer of pipeline, and the risk of similar galvanic corrosion or other electrochemical corrosion can not take place fully.
One of method that basalt fiber composite material is laid at position renovation reinforced at the pipeline needs and/or that strengthen may further comprise the steps:
(1) at pipe surface brushing curable polymer;
(2) laying high-strength degree basalt fibre, and roll extrusion makes curable polymer evenly flood basalt fibre;
Randomly repeat (1) and (2) repeatedly, be cured then.
This method is that complete wet method is pasted, and has uneven place such as crator or defective or piping attachment (as threeway, elbow, reducer, flange, tubule drive connector etc.) when locating, to have good easy construction for body.When operation, curable polymer is evenly distributed, and the thorough impregnation basalt fibre.When laying basalt fibre, the minimizing bubble of maximum possible, reduce voids, measure such as can take to vacuumize in the time of necessity.
The method that needs position renovation reinforced and/or that strengthen to lay basalt fiber composite material at pipeline can also adopt another method, may further comprise the steps:
(1) at basalt fibre surface dip-coating curable polymer, makes the basalt fibre prepreg;
(2) lay the basalt fibre prepreg;
Randomly repeat (1) and (2) repeatedly, be cured then.
This method is that dry method is laid, and is suitable better with on-the-spot pipeline condition, do not have bigger uneven place, and non-special-shaped pipeline annex (as threeway, elbow, reducer, flange, tubule drive connector etc.) to locate, this moment, execute-in-place more saved time, and helped racing against time when rushing to repair at the scene.
Wherein the basalt fibre prepreg is meant the curable polymer dip-coating and forms a kind of semi-finished product that store for future use by certain processing procedure to basalt fibre.The preparation method of prepreg roughly has by the method difference of curable polymer impregnation of fibers: solution dipping method, hot melt dipping and glued membrane spreading method, powder technology method.In general, prepreg needs low-temperature storage mostly, and the product of normal temperature storage is also arranged recently.
Prepreg can strictness be controlled the content of its curable polymer, thereby make the easier control of quality of prepreg because can prepare in advance.In order to improve the curing quality, can take vacuum solidification during curing.
When practical application, according to the concrete condition of pipeline, those skilled in the art can strengthen design method according to common defective reinforcement parameter or pipeline and determine the basalt fiber composite material number of plies, width and reinforcing material consumption.
The fibrous composite of each layer described in the said method for pipeline can lay along pipeline axial, hoop is laid or lay at a certain angle, also can be the combination in any of several paving modes.During practical application, those skilled in the art can design according to the concrete condition of pipeline.
Fiber described in the said method is a continuous fiber, is selected from no latitude cloth lamination, laminated, the multidirectional woven fibre material of two-dimensional fabric of unidirectional fibre, quadrature or oblique.During practical application, can select for use according to the pipeline concrete condition.Generally speaking, for ease of design, adopt unidirectional fibre more.But, also adopt other multidirectional fibers sometimes for the convenience and the Security of constructing.
Curable polymer described in the said method comprises body material and optional auxiliary material; Body material is for being selected from thermosetting resin, thermoplastic resin and high performance resin, preferred thermosetting resin; Auxiliary material are selected from curing agent, coupling agent, initator, thinner, crosslinking agent, fire retardant, polymerization inhibitor, anti-static agent, light stabilizer and filler.Wherein thermosetting resin is selected from epoxy resin, phenolic resin, unsaturated polyester resin, polyurethane resin, polyimide resin, span and comes amide resin, organic siliconresin, allyl resin or its modified resin.
Wherein the cohesion of epoxy resin and basalt fibre is strong, the mechanical property height, and fire retardant are good, and chemical resistance is good, therefore often selects epoxy resin for use.
Before carrying out renovation reinforced to pipeline and/or strengthening, that can choose wantonly carries out surface treatment to pipeline, as oil removing, rust cleaning, phosphatization, passivation, couplings etc. can improve the processing of interface binding power, if pipeline has uneven place, the usefulness that can choose wantonly is filled and led up resin and filled and led up processing.
Outside basalt fiber composite material, can carry out anticorrosionly with external anticorrosive material, comprise that the cold sealing tape that twines of polyureas or polyurethane coating, polyethylene or polypropylene twines.
Wherein need position renovation reinforced and/or that strengthen to comprise defective pipeline, piping attachment, or zero defect pipeline, the piping attachment that need strengthen.Wherein said defective comprises volume type defective, plane (crack type) defective, disperse damage type defective (hydrogen blister, microscopic crack), geometric type defective (be in a pout, misalignment etc.).
With basalt fiber composite material pipeline is carried out method renovation reinforced and/or that strengthen and can be used for metallic conduit, nonmetal pipeline, the preferable alloy pipeline is more preferably at the labour pipe-line.
For guaranteeing construction quality, basalt fibre should keep certain-length to overlap joint in length and breadth.
The anticorrosion reparation of operation area is carried out should respectively paste the adhesive surface drying of face in the reinforcement operation zone after.
For guaranteeing construction quality, when needs excavate with backfill, should carry out by construction requirement according to the rules.For example fixed defective locations is detected at the scene, must guard personnel's monitoring at the scene and implement the hand excavation down.Note in the digging process measuring buried depth, prevent that ironware from damaging anticorrosive coat and steel pipe.Finish at reinforcing construction, and after confirming that the excavation pipeline section does not have leak source, adopt fine sand or plain soil to carry out the compaction in layers backfill, and the scene is cleared up and recovered the landform original appearance, guarantee that the buried depth of pipeline reaches designing requirement.
Below by specific description of embodiments of the present invention, in conjunction with the accompanying drawings material of the present invention and method are given detailed explanation.
Description of drawings
Fig. 1 tests and uses the tube field picture
Fig. 2 defective schematic representation, flaw size 49mm * 18mm * 3.5mm
Fig. 3 fault location with the wide basalt fiber composite material reinforcement of 300mm after pipeline
Pipeline after Fig. 4 explosion
Embodiment
In order further to set forth related method of the present invention and construction process, provided following embodiment.But, the scope that these embodiments do not limit the present invention in any way.
Embodiment 1: with the hydraulic bursting test method technological scheme of the present invention is estimated
In order to check the implementation result of present technique, be example with φ 273 steel pipes, the flaw size that the simulation oil and gas pipeline may exist adopts the hydraulic bursting test method that this technology is estimated.Test is seen Fig. 1 with pipe and defective signal.
Process of the test is as follows:
1) intercepting oil and gas pipeline tubing pipeline 3m (this pipe is the Q235 spiral welded pipe, and caliber is 273mm, and wall thickness is 7mm) commonly used, the two ends end socket shutoff (see figure 1) that leaves exhaust port, water inlet.
2) make the flaw size (defective of 49mm * 18mm * 3.5mm).
3) the body position that needs reinforcement is cleared up,, and made its surface treatment quality reach the St3 level of stipulating among the GB/T8923-1988 with anticorrosive coat, corrosion and other dirts of removal outer tube surface.
4) then fault location is filled and led up with filling and leading up material (epoxy resin mortar).
5) wait to fill and lead up the material surface drying after, at pipe surface brushing phenolic resin class curable polymer, then along pipe ring to laying the wide unidirectional basalt fibre of 300mm.Repeat several times, lay 8 layers altogether.As shown in Figure 3.
6) strengthening course solidifies the back test is carried out the water filling exhaust with pipe, checking under sample fills with water and the watertight situation, pressurizes step by step, destroys until sample, as shown in Figure 4.
This bursting test result shows: destruction is to produce without renovation reinforced body place, destroys to be typical tearing mode destruction; Developmental tube has the marked inflation phenomenon, and there is no significant change through the fault location of reparation, reinforcement; Body bursting pressure after the reinforcement is 16.7Mpa, far above the design work pressure (6.4Mpa) of sample, shows that this technology has reached the purpose of reinforcement.
Embodiment 2
Similar with embodiment 1, with basalt fiber composite material the spiral weld defective is carried out reinforcement, verify its reinforcing effect with the hydrostatic pressing explosion then.
Experimentation is as follows:
1) intercepting oil and gas pipeline tubing pipeline 3.5m (this pipe is the Q235 spiral welded pipe, and caliber is 325mm, and wall thickness is 7mm) commonly used, the two ends end socket shutoff that leaves exhaust port, water inlet.
2) (long * wide * dark=60mm * 10mm * 5.16mm) defective at spiral pipeline weld joint manufactured size.
3) degreasing and rust removal being carried out at the body position that needs reinforcement handles.
4) defective being filled and led up resin with anko fills and leads up.
5) wait to fill and lead up the material surface drying after, lay the wide basalt fibre prepreg of 500mm at pipe surface.Lay 10 layers altogether.Heating makes its curing then.
Wherein, basalt fibre equipment of preimpregnated material manufacture process is as follows: epoxy 634 glue are placed the glue groove, and heating makes its fusion, then it is soaked into basalt fibre fully, then passes through hot pressing, makes the resin matrix fusion, in the fiber embedded resin matrix.Cooling is at last cut edge, and makes prepreg.
6) strengthening course solidifies the back test is carried out the water filling exhaust with pipe, checking under sample fills with water and the watertight situation, pressurizes step by step, destroys until sample.
This bursting test result shows: destruction is to produce without renovation reinforced body place, destroys to be typical tearing mode destruction; Developmental tube has the marked inflation phenomenon, and there is no significant change through the fault location of reparation, reinforcement; Body bursting pressure after the reinforcement is 18.7Mpa, far above the design work pressure (6.4Mpa) of sample, shows that this technology has reached the purpose of reinforcement.
Embodiment 3
Similar with embodiment 1, with basalt fiber composite material the pipeline that needs supercharging is repaired enhancing, verify its reinforcing effect with the hydrostatic pressing explosion then.
Experimentation is as follows:
1) intercepting oil and gas pipeline tubing pipeline 3.5m (this pipe is the Q235 spiral welded pipe, and caliber is 325mm, and wall thickness is 7mm, and design pressure 7.3MPa desires to bring up to 7.8MPa) commonly used,
The two ends end socket shutoff that leaves exhaust port, water inlet.
2) whole body being carried out degreasing and rust removal handles.
3) at pipe surface brushing epoxies curable polymer, then along the basalt fibre of pipe ring to the two-way cross braiding of laying.After the roll extrusion, repeat again several times, lay 8 layers altogether.
4) strengthening course solidifies the back test is carried out the water filling exhaust with pipe, checking under sample fills with water and the watertight situation, pressurizes step by step, until 10.8MPa (7.8MPa/0.72 (design ratio)).
After the pressure release, body does not have any surrender sign, and variations such as body girth and deformation are about zero, shows that this technology has reached the purpose that improves design pressure.
Below described embodiment of the present invention in detail, can do a lot of improvement and variation obviously for a person skilled in the art and can not deviate from essence spirit of the present invention.All these changes and improvements are all within protection scope of the present invention.
Claims (13)
1. one kind is carried out method renovation reinforced and/or that strengthen with basalt fiber composite material to pipeline, it is characterized in that laying basalt fiber composite material in position renovation reinforced at pipe surface needs and/or that strengthen.
2. the described method of claim 1 needs position renovation reinforced and/or that strengthen at pipe surface, lays basalt fiber composite material and may further comprise the steps:
(1) at pipe surface brushing curable polymer;
(2) lay basalt fibre, and roll extrusion, make curable polymer evenly flood basalt fibre;
Randomly repeat (1) and (2) repeatedly, be cured then.
3. the described method of claim 1 needs position renovation reinforced and/or that strengthen at pipe surface, lays basalt fiber composite material and may further comprise the steps:
(1) at basalt fibre surface dip-coating curable polymer, makes the basalt fibre prepreg;
(2) lay the basalt fibre prepreg;
Randomly repeat (1) and (2) repeatedly, be cured then.
4. each described method of claim 2-3, wherein said each layer fiber for pipeline can lay along pipeline axial, hoop is laid or lay at a certain angle, also can be the combination in any of several paving modes.
5. each described method of claim 1-4, wherein said fiber is a continuous fiber, is selected from no latitude cloth lamination, laminated, the multidirectional woven fibre material of two-dimensional fabric of unidirectional fibre, quadrature or oblique.
6. each described method of claim 2-5, wherein curable polymer comprises body material and optional auxiliary material; Body material is selected from thermosetting resin, thermoplastic resin and high performance resin, preferred thermosetting resin; Auxiliary material are selected from curing agent, coupling agent, initator, thinner, crosslinking agent, fire retardant, polymerization inhibitor, anti-static agent, light stabilizer and filler.
7. the described method of claim 6, wherein thermosetting resin is selected from epoxy resin, phenolic resin, unsaturated polyester resin, polyurethane resin, polyimide resin, span and comes amide resin, organic siliconresin, allyl resin or its modified resin, preferred epoxy.
8. according to each described method of claim 1-7, before carrying out renovation reinforced to pipeline or strengthening, that can choose wantonly carries out surface treatment to pipeline, the processing that can improve interface binding power as oil removing, rust cleaning, phosphatization, passivation, coupling.
9. each described method of claim 1-8 has uneven place at pipeline, and optional usefulness is filled and led up resin and filled and led up processing.
10. each described method of claim 1-9 also is included in basalt fiber composite material external application external anticorrosive material and carries out anticorrosionly, comprises that the cold sealing tape that twines of polyureas or polyurethane coating, polyethylene or polypropylene twines.
11. each described method of claim 1-3 wherein needs position renovation reinforced and/or that strengthen to comprise defective pipeline, piping attachment, or zero defect pipeline, the piping attachment that need strengthen.
12. the described method of claim 11, wherein said defective comprise volume type defective, planar defect, disperse damage type defective, geometric type defective.
13. each described method of claim 1-12, wherein pipeline is selected from metallic conduit or nonmetal pipeline, and the preferable alloy pipeline is more preferably at the labour pipe-line.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100011133A CN101206000B (en) | 2007-01-18 | 2007-01-18 | Method for renovation and reinforcement of pipe using basalt fibre complex material |
| PCT/CN2008/000139 WO2008089663A1 (en) | 2007-01-18 | 2008-01-18 | A method for repairing, reinforcing or enhancing a pipeline by use of basalt fiber composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100011133A CN101206000B (en) | 2007-01-18 | 2007-01-18 | Method for renovation and reinforcement of pipe using basalt fibre complex material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101206000A true CN101206000A (en) | 2008-06-25 |
| CN101206000B CN101206000B (en) | 2011-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100011133A Expired - Fee Related CN101206000B (en) | 2007-01-18 | 2007-01-18 | Method for renovation and reinforcement of pipe using basalt fibre complex material |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101206000B (en) |
| WO (1) | WO2008089663A1 (en) |
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| CN102226282A (en) * | 2011-05-20 | 2011-10-26 | 中国石油集团工程设计有限责任公司 | Corrosion resistant method of indoor buried valve of petroleum-gas pipeline engineering valve |
| CN102506265A (en) * | 2011-09-30 | 2012-06-20 | 南京双威生物医学科技有限公司 | Pipe leaking stoppage repair method |
| CN101936442B (en) * | 2009-07-01 | 2012-12-12 | 北京安科管道工程科技有限公司 | Method for mending steel pipeline polyolefin anticorrosive layer and product obtained by same |
| CN102927407A (en) * | 2012-10-23 | 2013-02-13 | 北京安科管道工程科技有限公司 | Method for joint coating of anticorrosive coating layer of steel pipeline and product obtained by using method |
| CN103612407A (en) * | 2013-11-03 | 2014-03-05 | 哈尔滨理工大学 | Manufacturing method of basalt fiber strengthened epoxy resin insulation pipe |
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| CN104790683A (en) * | 2015-04-14 | 2015-07-22 | 同济大学 | Method for reinforcing metal tube joint by means of fiber reinforced polymers (FRPs) |
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| CA2285496A1 (en) * | 1998-10-21 | 2000-04-21 | Kema Coatings Limited | Protection of a pipeline |
| CN1426888A (en) * | 2001-12-15 | 2003-07-02 | 周献刚 | Method of making pipe using basalt fiber as reinforcing material |
| CN1276024C (en) * | 2004-09-30 | 2006-09-20 | 北京科技大学 | Strengthening carbon fiber composite material and method for repairing defective pipeline |
| CN1853847B (en) * | 2005-04-15 | 2010-12-08 | 北京安科管道工程科技有限公司 | Method for repairing and reinforcing weld seam defects |
-
2007
- 2007-01-18 CN CN2007100011133A patent/CN101206000B/en not_active Expired - Fee Related
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2008
- 2008-01-18 WO PCT/CN2008/000139 patent/WO2008089663A1/en active Application Filing
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| CN112113849A (en) * | 2020-09-08 | 2020-12-22 | 天津大学 | Method for applying initial defects of submarine pipeline |
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| CN114623311A (en) * | 2020-12-10 | 2022-06-14 | 北京安科管道工程科技有限公司 | Method for repairing pipeline |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101206000B (en) | 2011-05-11 |
| WO2008089663A1 (en) | 2008-07-31 |
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