CN102602093A - 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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- CN102602093A CN102602093A CN2012100408469A CN201210040846A CN102602093A CN 102602093 A CN102602093 A CN 102602093A CN 2012100408469 A CN2012100408469 A CN 2012100408469A CN 201210040846 A CN201210040846 A CN 201210040846A CN 102602093 A CN102602093 A CN 102602093A
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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 the pipe-line system technical field, particularly a kind of pipe-line is with composite crack arrest ring structure.
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 for use high strength steel can reduce rolled steel dosage, reduce expenses such as tubing transportation, construction.But high intensity level steel crack arrest characteristic is relatively poor relatively, and long distance pipeline is because caliber is big, fed distance is long; Tubing internal flaw, transportation construction damage and weld defect omission probability increase; It is complicated, harsh to add the pipeline Service Environment, and pumped (conveying) medium generally is again inflammable and explosive or poisonous medium, and the defect of pipeline place is prone to form formation of crack; Expansion under the gases at high pressure effect makes the hundreds of rice of pipeline damage even a few km.Pipeline is no lack of densely inhabited district on the way, brings very big hidden danger to safety.Therefore, to the control of the higher pipeline of material grade considered pipeline crack unstable propagation when the design.Both at home and abroad in engineering practice, the crack arrest ring of employing major part is the steel loop form, is arranged in the outside of pipeline vertically, and keeps certain interval at present.But this metal crack arrest ring mainly is to reduce the distortion of opening behind the pipeline cracking by external force, can not prevent crackle crack initiation and expansion fully.There is report can composite be used as the crack arrest mode as local reinforcing band in addition both at home and abroad; But such composite reinforcing band reparation, enhancement techniques can't guarantee that the interface between nonmetallic materials and the metal body combines closely at present; And composite reinforcing band outer surface is usually because factors such as third party's construction receive mechanical damage; Cause from having had defective in using early stage; In practical application, can't really play the crack arrest effect, this also becomes a key issue that needs to be resolved hurrily of composite The field.
Summary of the invention
The objective of the invention is, provide a kind of can and the metal tube external surface between combine closely and can fetter the distortion of opening behind the pipeline cracking, and the pipe-line that prevents the crackle expansion is with composite crack arrest ring structure.
A kind of pipe-line provided by the invention comprises with composite crack arrest ring structure: first interface transition layer, anti-crackle extension layer, local enhancement layer, second contact surface transition zone and wear-resisting external protection coating;
Said first interface transition layer, anti-crackle extension layer, local enhancement layer, second contact surface transition zone and wear-resisting external protection coating are successively set on the metallic conduit outer surface from the inside to the outside.
Further; Said first interface transition layer adopts thermoplastic resin modified thermosetting resin; And pass through nanometer particle-modified simultaneously; Be used to reduce the pipeline and the interface void rate between the anti-crackle extension layer that need carry out crack arrest protection, improve interface bond strength, protection simultaneously prevents that the crackle extension layer avoids the internal environment chemical action.
Further, the thermoplastic resin modified thermosetting resin and the mass fraction thereof of said first interface transition layer employing are:
Epoxy resin 100, PEI 10-25, aromatic amine curing agent 20-35, nano silicon 2-6.
Further, said anti-crackle extension layer is:
The composite layer that constitutes behind basalt fibre and/or the Kafra fiber impregnating resin.
Further, said local enhancement layer is:
The composite layer that constitutes behind carbon fiber and/or the Kafra fiber impregnating resin; Said local enhancement layer is mainly used in bears the pipeline pressure, when there is local defect in pipeline, also has local enhancing ability, thereby recovers the pipeline bearing capacity.
Further, used resin and the mass fraction thereof of said anti-crackle extension layer and said local enhancement layer is: blending epoxy 100, PEI 10-25, aromatic amine curing agent 20-35, nano silicon 2-6.
Further, said second contact surface transition zone adopts thermoplastic resin modified thermosetting resin, is used to reduce the interface void rate between local enhancement layer and the external protection coating, improves interface bond strength, improves crack arrest ring structure globality simultaneously.
Further, the thermoplastic resin modified thermosetting resin and the mass fraction thereof of said second contact surface transition zone employing are:
Epoxy resin 100, polyimides 55-75, aromatic amine curing agent 10-30, nano silicon 2-6.
Further; Said wear-resisting external protection coating adopts modification Reinforced Nylon thermoplastic; Be used to protect the enhancement layer outer surface to avoid the 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.
Pipe-line provided by the invention is with composite crack arrest ring structure, take into full account unlike material and form chemistry and the difference on the physical property between the interface, in the structure through between unlike material, increasing interface transition layer; To guarantee to reduce the voidage between the different interfaces; Improve interface bond strength, and improve the globality of crack arrest ring structure, thereby realize the distortion of opening behind the constraint pipeline cracking; And prevent crackle expansion purpose, play the effect that local pipeline strengthens simultaneously; Through in structure, increasing wear-resisting external protection coating, protected the enhancement layer outer surface to avoid the external environment condition physical damnification, thereby avoided because the pipeline premature failure that composite crack arrest ring outer surface mechanical damage causes.
Description of drawings
A kind of pipe-line that Fig. 1 provides for the embodiment of the invention is with the structural representation of composite crack arrest ring structure.
The specific embodiment
Below in conjunction with specific embodiment the present invention is further specified.
As shown in Figure 1, pipeline 1 outer surface outwards is followed successively by first interface transition layer 2 from the lining, anti-crackle extension layer 3, local enhancement layer 4, second contact surface transition zone 5, wear-resisting external protection coating 6.Wherein: first interface transition layer 2 is to propose newly-increased design in the structure first; 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 the anti-crackle extension layer 3; Improve interface bond strength, the anti-crackle extension layer of protection is simultaneously avoided the internal environment chemical action.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 are (mass fraction): epoxy resin 100, PEI 10-25, aromatic amine curing agent 20-35, nano silicon 2-6.
Second contact surface transition zone 5 is to propose newly-increased design in the structure first, mainly plays the interface void rate that reduces between local enhancement layer 4 and the 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 are (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 to propose newly-increased design in the structure first; Its objective is in order to protect the enhancement layer outer surface to avoid the 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 Reinforced Nylon thermoplastic.
The described pipe-line of preparation Fig. 1 may further comprise the steps with composite crack arrest ring structure:
Step S1: allocate first interface transition layer, 2 used resin matrix prescriptions,, control its thickness between 0.5mm-1mm with the outer surface of resin-coated to pipeline 1;
Step S2: the anti-crackle extension layer 3 used resin matrix prescriptions of allotment, the crackle extension layer is prevented in preparation, and this layer is wound into the outer surface of first interface transition layer 2;
Step S3: allocate local enhancement layer 4 used resin matrix prescriptions, the preparation enhancement layer is wound into the outside of preventing crackle extension layer 3 with this layer then;
Step S4: allotment second contact surface transition zone 5 used resin matrix prescriptions, resin-coated to local enhancement layer 4 outer surfaces, is controlled its thickness between 0.2mm-0.5mm;
Step S5: wearing layer 6 is not closed circular (pre-processed), is compounded in the outside of second contact surface transition zone 5 then, and the closed place of annulus adopts sweat soldering.
Pipe-line provided by the invention is with composite crack arrest ring structure, and structure and performance can design by force, can be according to the different construction environments structure that design is suitable for mutually with service condition; First interface transition layer 2 that designs in the composite crack arrest ring structure; Can protect anti-crackle extension layer 3 to avoid the internal environment chemical action; Guarantee that simultaneously anti-crackle extension layer 3 fits tightly with the metal tube surface, have higher binding strength, not only can prevent the crackle expansion; And can play local pipeline humidification, thereby guarantee the safe handling of pipeline and the service life that prolongs pipeline; The second contact surface transition zone 5 of design has improved the interface bond strength between local enhancement layer 4 and the 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 surfaces to avoid the external environment condition physical damnification, can greatly avoid the tubing premature failure that causes because of the damage of the nonmetallic materials exterior mechanicals that factor caused such as third party's construction; This composite crack arrest ring is made and easy construction.
The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (9)
1. a pipe-line is characterized in that with composite crack arrest ring structure, comprising:
First interface transition layer, anti-crackle extension layer, local enhancement layer, second contact surface transition zone and wear-resisting external protection coating;
Said first interface transition layer, anti-crackle extension layer, local enhancement layer, second contact surface transition zone and wear-resisting external protection coating are successively set on the metallic conduit outer surface from the inside to the outside.
2. pipe-line as claimed in claim 1 is characterized in that with composite crack arrest ring structure:
Said first interface transition layer adopts thermoplastic resin modified thermosetting resin; And pass through nanometer particle-modified simultaneously; Be used to reduce the pipeline that need carry out crack arrest protection and the interface void rate between the anti-crackle extension layer; Improve interface bond strength, the anti-crackle extension layer of protection is simultaneously avoided the internal environment chemical action.
3. pipe-line as claimed in claim 2 is characterized in that with composite crack arrest ring structure thermoplastic resin modified thermosetting resin and mass fraction thereof that said first interface transition layer adopts are:
Epoxy resin 100, PEI 10-25, aromatic amine curing agent 20-35, nano silicon 2-6.
4. pipe-line as claimed in claim 1 is characterized in that with composite crack arrest ring structure said anti-crackle extension layer is:
The composite layer that constitutes behind basalt fibre and/or the Kafra fiber impregnating resin.
5. pipe-line as claimed in claim 1 is characterized in that with composite crack arrest ring structure said local enhancement layer is:
The composite layer that constitutes behind carbon fiber and/or the Kafra fiber impregnating resin; Said local enhancement layer is used to bear the pipeline pressure, when there is local defect in pipeline, also has local enhancing ability, thereby recovers the pipeline bearing capacity.
Like claim 4 or 5 described pipe-lines with composite crack arrest ring structure, it is characterized in that:
Used resin and the mass fraction thereof of said anti-crackle extension layer and said local enhancement layer is: blending epoxy 100, PEI 10-25, aromatic amine curing agent 20-35, nano silicon 2-6.
7. pipe-line as claimed in claim 1 is characterized in that with composite crack arrest ring structure:
Said second contact surface transition zone adopts thermoplastic resin modified thermosetting resin, is used to reduce the interface void rate between local enhancement layer and the external protection coating, improves interface bond strength, improves crack arrest ring structure globality simultaneously.
8. pipe-line as claimed in claim 7 is characterized in that with composite crack arrest ring structure, the thermoplastic resin modified thermosetting resin that said 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.
9. pipe-line as claimed in claim 1 is characterized in that with composite crack arrest ring structure:
Said wear-resisting external protection coating adopts modification Reinforced Nylon thermoplastic; Be used to protect the enhancement layer outer surface to avoid the 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.
Priority Applications (1)
| 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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| 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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| CN102602093A true CN102602093A (en) | 2012-07-25 |
| CN102602093B CN102602093B (en) | 2014-11-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108673962A (en) * | 2018-03-13 | 2018-10-19 | 华侨大学 | Crack arrest proximate matter |
| 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 |
| US20020134452A1 (en) * | 2001-03-21 | 2002-09-26 | Fairchild Douglas P. | Methods of girth welding high strength steel pipes to achieve pipeling crack arrestability |
| 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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2012
- 2012-02-21 CN CN201210040846.9A patent/CN102602093B/en active Active
Patent Citations (5)
| 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 |
| US20020134452A1 (en) * | 2001-03-21 | 2002-09-26 | Fairchild Douglas P. | Methods of girth welding high strength steel pipes to achieve pipeling crack arrestability |
| 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108673962A (en) * | 2018-03-13 | 2018-10-19 | 华侨大学 | Crack arrest proximate matter |
| 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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| CN102602093B (en) | 2014-11-26 |
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