CN102602093B - Composite crack arresting ring structure for oil and gas transmission pipeline - Google Patents
Composite crack arresting ring structure for oil and gas transmission pipeline Download PDFInfo
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- CN102602093B CN102602093B CN201210040846.9A CN201210040846A CN102602093B CN 102602093 B CN102602093 B CN 102602093B CN 201210040846 A CN201210040846 A CN 201210040846A CN 102602093 B CN102602093 B CN 102602093B
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Abstract
The invention discloses a composite crack arresting ring structure for an oil and gas transmission pipeline, which comprises a first interface transitional layer, a crack propagation preventing layer, a local enhancement layer, a second interface transitional layer and an outer wear-resisting protective layer. The first interface transitional layer, the crack propagation preventing layer, the local enhancement layer, the second interface transitional layer and the outer wear-resisting protective layer are arranged on the outer surface of a metal pipeline orderly form inside to outside. The composite crack arresting ring structure for the oil and gas transmission pipeline, provided by the invention, has strong designability in structure and performance, can be used for designing adaptive structures according to different construction environments and using conditions, not only prevents crack propagation but also enhances the local pipeline according to improvement of the structure, so that the pipeline can be guaranteed to be used safely and the service life of the pipeline is guaranteed to be prolonged. The composite crack arresting ring structure for the oil and gas transmission pipeline, provided by the invention, can extremely avoid premature failure of the pipeline resulting from external mechanical damages of non-metal materials caused by factors such as construction of a third party and the like.
Description
Technical field
The present invention relates to pipe-line system technical field, particularly composite crack arrest ring structure for a kind of pipe-line.
Background technology
Natural gas transport is tended to high grade of steel, large diameter pipeline at present, and adopts high pressure rich gas delivery technology.Under identical caliber and discharge pressure, select high strength steel can reduce rolled steel dosage, reduce the expenses such as tubing transportation, construction.But, high intensity level steel crack arrest characteristic is relatively poor, long distance pipeline is because caliber is large, fed distance is long, tubing internal flaw, transportation construction damage and the undetected probability of weld defect increase, add pipeline Service Environment complicated, harsh, pumped (conveying) medium is generally again inflammable and explosive or poisonous medium, and defect of pipeline place easily forms formation of crack, under gases at high pressure effect, expand, make even several kms of the hundreds of rice of pipeline damage.Pipeline is no lack of densely inhabited district on the way, poses great risks.Therefore, to higher grade of material pipeline, when designing, should consider the control of pipeline crack unstable propagation.Both at home and abroad in engineering practice, the crack arrest ring of employing major part is steel loop form, is arranged in vertically the outside of pipeline, and keeps certain interval at present.But this metal crack arrest ring is mainly to reduce the distortion of opening after pipeline cracking by external force, can not completely pre-Anti-cracking crack initiation and expansion.There is in addition report composite can be applied as crack arrest mode as local enhancement band both at home and abroad, but such composite reinforcing band reparation, enhancing technology cannot guarantee that the interface between nonmetallic materials and metal tube combines closely at present, and composite reinforcing band outer surface is usually because the factors such as third party's construction are subject to mechanical damage, cause from earlier stage having had defect in application, cannot really play crack arrest effect in actual applications, this also becomes a key issue urgently to be resolved hurrily of the on-the-spot application of composite.
Summary of the invention
The object of the invention is, provide a kind of can and metal tube outer surface between combine closely and can fetter the distortion of opening after pipeline cracking, and prevent the composite crack arrest ring structure for pipe-line of Crack Extension.
Composite crack arrest ring structure for a kind of pipe-line provided by the invention, comprising: the first interface transition layer, Anti-cracking extension layer, local enhancement layer, second contact surface transition zone and wear-resisting external protection coating;
Described the first interface transition layer, Anti-cracking extension layer, local enhancement layer, second contact surface transition zone and wear-resisting external protection coating are successively set on metallic conduit outer surface from the inside to the outside;
Described the first interface transition layer adopts thermoplastic resin modified thermosetting resin, and pass through nanometer particle-modified simultaneously, for reducing need, carry out the pipeline of crack arrest protection and the interface void rate between Anti-cracking extension layer, improve interface bond strength, protect Anti-cracking extension layer to avoid internal environment chemical action simultaneously;
Thermoplastic resin modified thermosetting resin and mass fraction thereof that described the first interface transition layer adopts are: epoxy resin 100, PEI 10-25, aromatic amine curing agent 20-35, nano silicon 2-6;
Described Anti-cracking extension layer is:
The composite layer forming after basalt fibre and/or Kafra fiber impregnating resin;
Described local enhancement layer is the composite layer forming after carbon fiber and/or Kafra fiber impregnating resin; Described local enhancement layer is mainly used in bearing pipeline pressure, when pipeline exists local defect, also has local enhancement ability, thereby recovers pipeline bearing capacity;
Described Anti-cracking extension layer and described local enhancement layer resin and mass fraction thereof used is: blending epoxy 100, PEI 10-25, aromatic amine curing agent 20-35, nano silicon 2-6;
The thermoplastic resin modified thermosetting resin that described second contact surface transition zone adopts and, mass fraction is: epoxy resin 100; Polyimides 55-75; Aromatic amine curing agent 10-30; Nano silicon 2-6.Further, described second contact surface transition zone adopts thermoplastic resin modified thermosetting resin, for reducing the interface void rate between local enhancement layer and external protection coating, improves interface bond strength, improves crack arrest ring structure globality simultaneously.
Further; described wear-resisting external protection coating adopts modification to strengthen nylon thermoplastic; for the protection of enhancement layer outer surface, avoid external environment condition physical damnification, can greatly prevent the tubing premature failure that the outside breakage of tubing that nonmetallic materials cause because of factors such as third party's constructions causes.
Composite crack arrest ring structure for pipe-line provided by the invention, take into full account unlike material and form chemistry between interface and the difference in physical property, in structure by increase interface transition layer between unlike material, to guarantee to reduce the voidage between different interfaces, improve interface bond strength, and improve the globality of crack arrest ring structure, thereby realize the distortion of opening after constraint pipeline cracking, and prevent Crack Extension object, play the effect that local pipeline strengthens simultaneously; By increase wear-resisting external protection coating in structure, protected enhancement layer outer surface to avoid external environment condition physical damnification, thereby avoided the pipeline premature failure that causes due to composite crack arrest ring outer surface mechanical damage.
Accompanying drawing explanation
A kind of pipe-line that Fig. 1 provides for embodiment of the present invention structural representation of composite crack arrest ring structure.
The specific embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
As shown in Figure 1, pipeline 1 outer surface is from inner first interface transition layer 2 that is outwards followed successively by, Anti-cracking extension layer 3, local enhancement layer 4, second contact surface transition zone 5, wear-resisting external protection coating 6.Wherein: the first interface transition layer 2 is in structure, to propose first newly-increased design; be metal and nonmetal between interface transition layer; mainly play reduction and need carry out the metallic conduit of crack arrest protection and the interface void rate between Anti-cracking extension layer 3; improve interface bond strength, protect Anti-cracking extension layer to avoid internal environment chemical action simultaneously.The first interface transition layer 2 adopts thermoplastic resin modified thermosetting resin, and pass through nanometer particle-modified simultaneously, resin system comprises: epoxy resin, PEI, aromatic amine curing agent and nano-silicon dioxide particle, its proportioning is (mass fraction): epoxy resin 100, PEI 10-25, aromatic amine curing agent 20-35, nano silicon 2-6.
Anti-cracking extension layer 3 is the composite layer forming after basalt fibre and/or Kafra fiber impregnating resin; Local enhancement layer 4 is the composite layer forming after carbon fiber and/or Kafra fiber impregnating resin.Anti-cracking extension layer 3 and local enhancement layer 4 resin system used comprise: difunctional epoxy resin, trifunctional epoxy resin, PEI, aromatic amine curing agent, nano-silicon dioxide particle, its proportioning is (mass fraction): blending epoxy 100, PEI 10-25, aromatic amine curing agent 20-35, nano silicon 2-6.Being combined with the interface of the first interface transition layer 2 in the interface of Anti-cracking extension layer 3, adopts same series plastics system, not only can improve the interfacial combined function between this layer and outer metallic surface, also can avoid occurring galvanic corrosion; Local enhancement layer 4 is mainly used to bear pipeline pressure, when pipeline exists local defect, also has local enhancement ability, thereby recovers pipeline bearing capacity.
Second contact surface transition zone 5 is in structure, to propose first newly-increased design, mainly plays the interface void rate reducing between local enhancement layer 4 and external protection coating 6, improves interface bond strength, improves crack arrest ring structure globality simultaneously.Second contact surface transition zone 5 adopts thermoplastic resin modified thermosetting resin, resin system comprises: epoxy resin, polyimides, aromatic amine curing agent, nano-silicon dioxide particle, its proportioning is (mass fraction): epoxy resin 100, polyimides 55-75, aromatic amine curing agent 10-30, nano silicon 2-6.
Wear-resisting external protection coating 6 is in structure, to propose first newly-increased design; its objective is in order to protect enhancement layer outer surface to avoid external environment condition physical damnification, can greatly prevent the tubing premature failure that the outside breakage of tubing that nonmetallic materials cause because of factors such as third party's constructions causes.Wear-resisting external protection coating adopts modification to strengthen nylon thermoplastic.
The pipe-line of preparing described in Fig. 1 comprises the following steps with composite crack arrest ring structure:
Step S1: allotment the first interface transition layer 2 resin matrix formula used, the outer surface by resin-coating to pipeline 1, controls its thickness between 0.5mm-1mm;
Step S2: allotment Anti-cracking extension layer 3 resin matrix formulas used, prepare Anti-cracking extension layer, and this layer is wound into the outer surface of the first interface transition layer 2;
Step S3: allotment local enhancement layer 4 resin matrix formula used, prepare enhancement layer, then this layer is wound into the outside of Anti-cracking extension layer 3;
Step S4: allotment second contact surface transition zone 5 resin matrix formulas used, resin-coating, to local enhancement layer 4 outer surface, is controlled to its thickness between 0.2mm-0.5mm;
Step S5: wearing layer 6 is not closed circular (pre-processed), is then compounded in the outside of second contact surface transition zone 5, and the closed place of annulus adopts sweat soldering.
Composite crack arrest ring structure for pipe-line provided by the invention, structure and performance can design by force, can be according to different construction environments and the mutually applicable structure of service condition design; The first interface transition layer 2 designing in composite crack arrest ring structure, can protect Anti-cracking extension layer 3 to avoid internal environment chemical action, guarantee that Anti-cracking extension layer 3 and metal tube surface fit tightly simultaneously, there is higher bond strength, not only can prevent Crack Extension, and can play local pipeline humidification, thereby guarantee the safe handling of pipeline and the service life that extends pipeline; The second contact surface transition zone 5 of design, has improved the interface bond strength between local enhancement layer 4 and wear-resisting external protection coating 6, and has improved the globality of crack arrest ring structure; The wear-resisting external protection coating 6 that the design of crack arrest ring outer surface increases, has protected local enhancement layer 4 outer surface to avoid external environment condition physical damnification, can greatly avoid the nonmetallic materials exterior mechanical causing because of factors such as third party's constructions to damage the tubing premature failure causing; This composite crack arrest ring is manufactured and easy construction.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (2)
1. a composite crack arrest ring structure for pipe-line, is characterized in that, comprising:
The first interface transition layer, Anti-cracking extension layer, local enhancement layer, second contact surface transition zone and wear-resisting external protection coating;
Described the first interface transition layer, Anti-cracking extension layer, local enhancement layer, second contact surface transition zone and wear-resisting external protection coating are successively set on metallic conduit outer surface from the inside to the outside;
Described the first interface transition layer adopts thermoplastic resin modified thermosetting resin, and pass through nanometer particle-modified simultaneously, for reducing need, carry out the pipeline of crack arrest protection and the interface void rate between Anti-cracking extension layer, improve interface bond strength, protect Anti-cracking extension layer to avoid internal environment chemical action simultaneously;
Thermoplastic resin modified thermosetting resin and mass fraction thereof that described the first interface transition layer adopts are: epoxy resin 100, PEI 10-25, aromatic amine curing agent 20-35, nano silicon 2-6;
Described Anti-cracking extension layer is the composite layer forming after basalt fibre and/or Kafra fiber impregnating resin;
Described local enhancement layer is the composite layer forming after carbon fiber and/or Kafra fiber impregnating resin; Described local enhancement layer is used for bearing pipeline pressure, when pipeline exists local defect, also has local enhancement ability, thereby recovers pipeline bearing capacity;
Described Anti-cracking extension layer and described local enhancement layer resin and mass fraction thereof used is: blending epoxy 100, PEI 10-25, aromatic amine curing agent 20-35, nano silicon 2-6;
The thermoplastic resin modified thermosetting resin that described second contact surface transition zone adopts and, mass fraction is: epoxy resin 100; Polyimides 55-75; Aromatic amine curing agent 10-30; Nano silicon 2-6.
2. composite crack arrest ring structure for pipe-line as claimed in claim 1, is characterized in that:
Described wear-resisting external protection coating adopts modification to strengthen nylon thermoplastic; for the protection of enhancement layer outer surface, avoid external environment condition physical damnification, can greatly prevent the tubing premature failure that the outside breakage of tubing that nonmetallic materials cause because of factors such as third party's constructions causes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210040846.9A CN102602093B (en) | 2012-02-21 | 2012-02-21 | Composite crack arresting ring structure for oil and gas transmission pipeline |
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| CN201210040846.9A CN102602093B (en) | 2012-02-21 | 2012-02-21 | Composite crack arresting ring structure for oil and gas transmission pipeline |
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| CN102602093A CN102602093A (en) | 2012-07-25 |
| CN102602093B true CN102602093B (en) | 2014-11-26 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103453244A (en) * | 2013-09-25 | 2013-12-18 | 苏州誉之铖贸易有限责任公司 | Anti-corrosion plastic pipe |
| CN108673962B (en) * | 2018-03-13 | 2024-02-27 | 华侨大学 | Crack-stopping section bar |
| CN110274120A (en) * | 2018-03-16 | 2019-09-24 | 中国石油天然气股份有限公司 | Oversleeve |
| CN110822998A (en) * | 2018-08-14 | 2020-02-21 | 郭骏 | Method for protecting equipment or equipment parts |
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| US4559974A (en) * | 1982-10-01 | 1985-12-24 | Fawley Norman | Apparatus and method of arresting ductile fracture propagation |
| US4700752A (en) * | 1982-10-01 | 1987-10-20 | Fawley Norman | Clock spring crack arrestor |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020134452A1 (en) * | 2001-03-21 | 2002-09-26 | Fairchild Douglas P. | Methods of girth welding high strength steel pipes to achieve pipeling crack arrestability |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4559974A (en) * | 1982-10-01 | 1985-12-24 | Fawley Norman | Apparatus and method of arresting ductile fracture propagation |
| US4700752A (en) * | 1982-10-01 | 1987-10-20 | Fawley Norman | Clock spring crack arrestor |
| 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 |
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