CN101216141A - Pipeline damage rehabilitation method - Google Patents
Pipeline damage rehabilitation method Download PDFInfo
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- CN101216141A CN101216141A CNA2008100001348A CN200810000134A CN101216141A CN 101216141 A CN101216141 A CN 101216141A CN A2008100001348 A CNA2008100001348 A CN A2008100001348A CN 200810000134 A CN200810000134 A CN 200810000134A CN 101216141 A CN101216141 A CN 101216141A
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- prepreg
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Abstract
The invention belongs to the field of pipeline repair techniques and relates to an improvement in the existing pipeline repair method. The inventive repair method comprises the following steps: pipeline clearing, prepreg material packing, and prepreg material curing. The invention realizes on-line repair and continuous large-scale production, greatly increases the repair efficiency, reduces the repair cost and labor intensity, improves the repair quality, and realizes the reinforcement of complex profiled surfaces.
Description
Technical field
The invention belongs to pipe rehabilitation technology, relate to improvement existing pipe repairing method.
Background technique
Because the skewness of petroleum resources weighing apparatus property, oil and products thereof need transmit between zones of different by various ways such as pipelines, the repair of pipeline has become essential, regular work in the oil-gas gathering and transportation process, and all need drop into a large amount of manpower and financial resources every year.And petrochemical industry, metallurgy industry etc. need a large amount of liquids and gases delivering pipes, and wherein considerable part inefficacy in various degree occurs through being on active service for many years, need upgrade, transformation, overhaul.Present pipe rehabilitation technology mainly comprises repair welding, benefit plate, sleeve and hand paste composite material repairing method etc.Repair welding, benefit plate, sleeve repairing method must stop production and just can carry out, and can cause very big economic loss.The shortcoming that hand is stuck with paste the composite material repairing method is: can not produce in enormous quantities continuously; Repairing efficiency is low; The repairing quality instability.
Summary of the invention
The objective of the invention is: propose a kind of can online reparation, can produce in enormous quantities continuously, repairing efficiency height, the stable pipeline damage rehabilitation method of repairing quality.
Technological scheme of the present invention is: a kind of pipeline damage rehabilitation method is characterized in that the step of reparation is made up of duct cleaning, prepreg parcel and prepreg curing;
1, duct cleaning;
1.1, select the solvent of cleanser conduit; For the pipeline of in ℃ environment of temperature≤80, working, use boiling point not to be higher than 80 ℃ organic solvent as the solvent of cleanser conduit, for the pipeline of in ℃ environment of temperature＞80, working, use higher boiling to be higher than 80 ℃ of organic solvents;
1.2, the damage field of pipeline is carried out cleaning surfaces; At first remove the surface contaminants and the corrosion thing of the damaged portion of pipeline, with an organic solvent carry out cleaning surfaces then, till the body that exposes pipeline;
1.3, remove remaining solvent; Adopt the method for nature volatilization or heated volatile to make solvent evaporates clean;
2, pipeline parcel;
2.1, select prepreg; Fabric in the prepreg is that the fiber with glass fibre, basalt fibre, aramid fibre, carbon fiber one of them or two or more is a raw material, one of the two dimension of making through woven, braiding, knitting, stitching, operation such as non-woven or three dimensional fabric; Resin in the prepreg is the mixture of epoxy resin, unsaturated polyester, phenolic resin, polyurethane resin, cyanate ester resin, bimaleimide resin, polyimide resin and above-mentioned resin; Resin content in the prepreg accounts for 25%～85% of prepreg gross weight;
2.2, determine to need the number of plies of the prepreg of parcel;
The minimum parcel number of plies of prepreg n
MinCalculate by following formula:
Wherein:
h
Hole--the maximum depth in corrosion or damage hole, the mm of unit;
σ
Pipelime--pipeline body YIELD STRENGTH, units MPa;
h
Comp--select the prepreg individual layer pressure of use thick, the mm of unit;
σ
Comp--the composite material of selecting to obtain after the prepreg curing of use is in the tensile strength of wrapping up on the direction, units MPa;
ξ--safety factor, dimensionless, ξ 〉=1.
Need the prepreg number of plies of parcel must be not less than the minimum parcel number of plies that calculates.
2.3, the cutting prepreg; The length of prepreg is according to determining that the good parcel number of plies and the pipe diameter of needs reparation calculate, and prepreg parcel width should increase 10mm～300mm on the basis of damage field size;
2.4, to the damage field of pipeline parcel prepreg; Before parcel, damage field coating one deck thermosetting resin or the glued membrane identical with the prepreg matrix resin to pipeline wraps up prepreg then;
3, the curing of prepreg; Dissimilar according to the prepreg that is adopted adopt corresponding curing process to be cured.
Advantage of the present invention is: can carry out online reparation, can produce in enormous quantities continuously, increase substantially repairing efficiency, reduce repairing cost and labor intensity, improve repairing quality, and can realize complicated profile reinforcement.The maximum difference that the present invention and hand are stuck with paste the composite material repairing method is that resin and fiber composite are integral in the prepreg, feedstock production can be separated with mending course, and its advantage is:
(1) in the special-purpose factory of prepreg, produces in enormous quantities continuously before the reparation construction, and can in storage period, be used for repairing work at any time, improved the flexibility and the efficiency of construction of repairing;
(2) preparation of prepreg belongs to automatic production, and its process can be carried out in strict accordance with relevant criterion and technical requirements, and this normalized, standardized technology can fully guarantee the mass stability of repairing material, and gives full play to the performance of reinforcing material; And resin system will be prepared at the scene in the hand paste technology, influenced by workmen's qualification, repairing amount, construction environment, raw material original state etc., the proportioning of resin system has deviation easily, the mixed with resin uniformity and fibre content uniformity often have than cataclysm, thereby repairing quality stability is had a negative impact;
(3) resin wraps up fiber fully in the prepreg, and this has at first guaranteed the good infiltration of resin to fiber, thereby has guaranteed the raising of repairing quality; Secondly resin has played protective action to fiber, and in storage, transportation and using process, fiber is difficult for falling hair and damage, thereby has greatly improved the retention rate of fibrous mechanical property;
(4) only need in the prepreg using process it directly is wrapped in fault location, saved and brushed the operation of resin, thereby reduced labor intensity, improved work situation, and improved repairing efficiency;
(5) prepreg carries out from producing to the standard and the step of repairing than being easier to according to the rules, and interference from human factor is little, has guaranteed the quality of repairing.
Embodiment
Below the present invention is described in further details.A kind of pipeline damage rehabilitation method is characterized in that, the step of reparation is made up of duct cleaning, prepreg parcel and prepreg curing;
1, duct cleaning;
1.1, select the solvent of cleanser conduit; For the pipeline of in ℃ environment of temperature≤80, working, use boiling point not to be higher than 80 ℃ organic solvent as the solvent of cleanser conduit, for the pipeline of in ℃ environment of temperature＞80, working, use higher boiling to be higher than 80 ℃ of organic solvents;
1.2, the damage field of pipeline is carried out cleaning surfaces; At first remove the surface contaminants and the corrosion thing of the damaged portion of pipeline, with an organic solvent carry out cleaning surfaces then, till the body that exposes pipeline;
1.3, remove remaining solvent; Adopt the method for nature volatilization or heated volatile to make solvent evaporates clean;
2, pipeline parcel;
2.1, select prepreg; Fabric in the prepreg is that the fiber with glass fibre, basalt fibre, aramid fibre, carbon fiber one of them or two or more is a raw material, one of the two dimension of making through woven, braiding, knitting, stitching, operation such as non-woven or three dimensional fabric; Resin in the prepreg is the mixture of epoxy resin, unsaturated polyester, phenolic resin, polyurethane resin, cyanate ester resin, bimaleimide resin, polyimide resin and above-mentioned resin; Resin content in the prepreg accounts for 25%～85% of prepreg gross weight;
2.2, determine to need the number of plies of the prepreg of parcel;
The minimum parcel number of plies of prepreg n
MinCalculate by following formula:
Wherein:
h
Hole--the maximum depth in corrosion or damage hole, the mm of unit;
σ
Pipeline--pipeline body YIELD STRENGTH, units MPa;
h
Comp--select the prepreg individual layer pressure of use thick, the mm of unit;
σ
Comp--the composite material of selecting to obtain after the prepreg curing of use is in the tensile strength of wrapping up on the direction, units MPa;
ξ--safety factor, dimensionless, ξ 〉=1.
Need the prepreg number of plies of parcel must be not less than the minimum parcel number of plies that calculates.
2.3, the cutting prepreg; The length of prepreg is according to determining that the good parcel number of plies and the calculation of parameter such as pipe diameter of needs reparation obtain, and prepreg parcel width should increase 10mm～300mm on the basis of damage field size;
2.4, to the damage field of pipeline parcel prepreg; Before parcel, damage field coating one deck thermosetting resin or the glued membrane identical with the prepreg matrix resin to pipeline wraps up prepreg then;
3, the curing of prepreg; Dissimilar according to the prepreg that is adopted adopt corresponding curing process to be cured.
Embodiment:
1. the working pressure of certain oil transport pipeline is 3.0MPa, 50 ℃ of operating temperatures, and pipe diameter is 800mm, material is a cast iron.Find that now certain zone maximum diameter of having an appointment reaches Φ 60mm, maximum depth reaches the etch pit group of 2.5mm, has more corrosion mottling around the etch pit.Adopt the carbon fiber plain cloth reinforced epoxy prepreg of room curing to carry out online reparation.Concrete reparation step is: 1) at first cleaning surfaces is carried out in the pipe damage zone, use acetone to the wiping of corrosion damage place, wherein partial corrosion more seriously locates to use sand papering, but notes pipeline body not being caused big physical damnification; 2) will clean and make the pipeline after organic solvent fully volatilizees to use prepreg (resin content is 35%) to wrap up, and apply one deck room temperature curing epoxy before the prepreg parcel, safety factor ξ be taken as 1.3, and the prepreg parcel number of plies is 8 layers.Prepreg parcel width both sides on the basis of damage field size all increase 300mm; 3) under the operating temperature prepreg that wraps up is cured; 4) natural cooling was got back to operating temperature after curing was finished, and finished repair.
2. the working pressure of certain gas pipeline is 1.0MPa, 110 ℃ of operating temperatures, and pipe diameter is a cast steel for the 500mm material.Now find the Φ 30mm diameter of having an appointment on certain section, maximum depth reaches the corrosion hole of 1mm.Adopting the highest solidifying temperature is the reparation that do not stop production of the two-way fabric reinforced epoxy of the glass fibre prepreg of 130 ℃ intermediate temperature setting.Concrete reparation step is: 1) use the N-methyl pyrrolidone to corrosion place wiping, the heavier place of part corrosion also can use sand papering, but notes and can not cause big physical damnification and cause leakage pipeline body; 2) will clean and make the pipeline after organic solvent fully volatilizees to use prepreg (resin content is 40%) to wrap up, parcel one deck intermediate temperature setting glued membrane be in order to increase cohesive force before parcel, and safety factor ξ is taken as 1.5, and the parcel number of plies is 5 layers.Prepreg parcel width both sides on the basis of damage field size all increase 100mm; 3) prepreg that wraps up is solidified 2h earlier under operating temperature, operating temperature adopts area heating installation to carry out 130 ℃ of curing after solidifying end again; 4) take to blow a cold wind over after curing is finished and quicken to be cooled to operating temperature, finish repair.
3. the working pressure of certain transfusion fluid pipeline is 2.5MPa, 300 ℃ of operating temperatures, and pipe diameter is 400mm, material is a cast steel.Continuous diameter is arranged in Φ 5mm～Φ 30mm scope on now finding certain section, the degree of depth is the corrosion hole group of 1mm～4mm scope.Reparation does not stop production to adopt the unidirectional plain cloth of basalt fibre to strengthen polyimide prepreg (solidifying temperature is 300 ℃).Concrete reparation step is: 1) use the sand papering corrosion, but note and can not cause big physical damnification and cause gas leakage pipeline body, use the N-methyl pyrrolidone to corrosion place wiping.This step must be noted that the high temperature labor protection when implementing; 2) will clean and make the pipeline after organic solvent fully volatilizees to use prepreg (resin content is 65%) to wrap up, and apply one deck polyimide resin before the prepreg parcel, safety factor ξ be taken as 1.5, and the parcel number of plies is 18 layers.Prepreg parcel width both sides on the basis of damage field size all increase 30mm; 3) prepreg that parcel is good is cured under operating temperature; 4) naturally cool to operating temperature after curing is finished, finish repair.
4. the working pressure of certain gas pipeline is 1.0MPa, and operating temperature is a room temperature, and pipe diameter is 1200mm, and thickness is 5mm, and material is a cast aluminium.Find that now it is running through broken hole and continuous mechanical deterioration being arranged of Φ 80mm that elbow on the pipeline has diameter, gas leaks in a large number.Adopt room curing aramid fibre braided fabric to strengthen the reparation that stops production of unsaturated polyester prepreg.Concrete reparation step is: after 1) pipeline quits work, use the sand papering injured surface, use tetrahydrofuran to the mechanical deterioration wiping; 2) will clean and make the pipeline after organic solvent fully volatilizees to use prepreg (resin content is 25%) to wrap up, before parcel, apply one deck unsaturated polyester in order to increase cohesive force, safety factor ξ is taken as 1.2, the parcel number of plies is 9 layers, and prepreg parcel width both sides on the basis of damage field size all increase 100mm; 3) after parcel finishes, keep prepreg and the complete applying of elbow, room temperature environment solidified about 3～8 hours down; 4) naturally cool to room temperature, finish reparation, pipeline is resumed work.
5. the working pressure of certain gas pipeline is 15MPa, and operating temperature is 80 ℃, and pipe diameter is 400mm, and material is a manganese steel.Find that now elbow has continuous zonal corrosion on the pipeline, maximum corrosion depth is 3.0mm.In view of high workload pressure, reparation stops production to adopt room curing carbon fiber and glass fibre hybrid fabric to strengthen phenolic resin preimpregnation material (the highest solidifying temperature is 120 ℃).Concrete reparation step is: after 1) pipeline quits work, use the sand papering corrosion more seriously to locate, use the butanone wiping to clean up; 2) will clean and make the pipeline after organic solvent fully volatilizees to use prepreg (resin content is 30%) to wrap up, and apply one deck phenolic resin before the parcel in order to increase cohesive force, safety factor ξ be taken as 2.0, and the parcel number of plies is 18 layers.Prepreg parcel width both sides on the basis of damage field size all increase 20mm; 3) after parcel finishes, keep prepreg and the complete applying of elbow, adopt area heating installation to be cured by prepreg curing system; 4) naturally cool to room temperature, finish reparation, gas pipeline is resumed work.
Claims (1)
1. a pipeline damage rehabilitation method is characterized in that, the step of reparation is made up of duct cleaning, prepreg parcel and prepreg curing;
1.1, duct cleaning;
1.1.1, select the solvent of cleanser conduit; For the pipeline of in ℃ environment of temperature≤80, working, use boiling point not to be higher than 80 ℃ organic solvent as the solvent of cleanser conduit, for the pipeline of in ℃ environment of temperature＞80, working, use boiling point to be higher than 80 ℃ of organic solvents;
1.1.2, the damage field of pipeline is carried out cleaning surfaces; At first remove the surface contaminants and the corrosion thing of the damaged portion of pipeline, with an organic solvent carry out cleaning surfaces then, till the body that exposes pipeline;
1.1.3, remove remaining solvent; Adopt the method for nature volatilization or heated volatile to make solvent evaporates clean;
1.2, pipeline parcel;
1.2.1, select prepreg; Fabric in the prepreg is that the fiber with glass fibre, basalt fibre, aramid fibre, carbon fiber one of them or two or more is a raw material, one of the two dimension of making through woven, braiding, knitting, stitching, operation such as non-woven or three dimensional fabric; Resin in the prepreg is the mixture of epoxy resin, unsaturated polyester, phenolic resin, polyurethane resin, cyanate ester resin, bimaleimide resin, polyimide resin and above-mentioned resin; Resin content in the prepreg accounts for 25%～85% of prepreg gross weight;
1.2.2, determine to need the number of plies of the prepreg of parcel;
The minimum parcel number of plies of prepreg n
MinCalculate by following formula:
Wherein:
h
Holc--the maximum depth in corrosion or damage hole, the mm of unit;
σ
Pipeline--pipeline body YIELD STRENGTH, units MPa;
h
Comp--select the prepreg individual layer pressure of use thick, the mm of unit;
σ
Comp--the composite material of selecting to obtain after the prepreg curing of use is in the tensile strength of wrapping up on the direction, units MPa;
ξ--safety factor, dimensionless, ξ 〉=1.
Need the prepreg number of plies of parcel must be not less than the minimum parcel number of plies that calculates.
2.3, the cutting prepreg; The length of prepreg is according to determining that the good parcel number of plies and the pipe diameter of needs reparation calculate, and prepreg parcel width should increase 10mm～300mm on the basis of damage field size;
1.2.4, to the damage field of pipeline parcel prepreg; Before parcel, damage field coating one deck thermosetting resin or the glued membrane identical with the prepreg matrix resin to pipeline wraps up prepreg then;
1.3, the curing of prepreg; Dissimilar according to the prepreg that is adopted adopt corresponding curing process to be cured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100001348A CN101216141A (en) | 2008-01-04 | 2008-01-04 | Pipeline damage rehabilitation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100001348A CN101216141A (en) | 2008-01-04 | 2008-01-04 | Pipeline damage rehabilitation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101216141A true CN101216141A (en) | 2008-07-09 |
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|---|---|---|---|
| CNA2008100001348A Pending CN101216141A (en) | 2008-01-04 | 2008-01-04 | Pipeline damage rehabilitation method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345780A (en) * | 2010-08-03 | 2012-02-08 | 合肥华宇橡塑设备有限公司 | Profiling pipe fitting |
| 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 |
| CN102748557A (en) * | 2012-07-13 | 2012-10-24 | 黄石新兴管业有限公司 | Process method for repair of leaking cast iron pipe fitting with glue |
| CN103542227A (en) * | 2012-07-16 | 2014-01-29 | 西安格林石油科技有限公司 | Method for reinforcing corroded position of pipeline by using carbon fibers |
| CN106759785A (en) * | 2016-12-23 | 2017-05-31 | 温州市腾方园林建设有限公司 | A kind of green drainage construction tubing in municipal gardens |
| CN106958716A (en) * | 2017-05-07 | 2017-07-18 | 中铁十八局集团有限公司 | A kind of PCCP pipe joints caulking joint construction method |
| CN106995036A (en) * | 2016-01-22 | 2017-08-01 | 江南造船(集团)有限责任公司 | The restorative procedure of rhombus independent liquid cargo tank protective layer |
| CN107037550A (en) * | 2017-03-21 | 2017-08-11 | 海安南京大学高新技术研究院 | Aramid fiber enhancing core of self-repair function and preparation method thereof |
| CN109268581A (en) * | 2018-09-06 | 2019-01-25 | 国营芜湖机械厂 | A kind of special-shaped thin wall welding power fuel oil conduit reliability growth method |
| CN111503418A (en) * | 2020-03-23 | 2020-08-07 | 中山大学 | Pressurized plugging composite structure and plugging method for gas leakage of underwater pipe gallery with high-pressure gas around |
-
2008
- 2008-01-04 CN CNA2008100001348A patent/CN101216141A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345780A (en) * | 2010-08-03 | 2012-02-08 | 合肥华宇橡塑设备有限公司 | Profiling pipe fitting |
| 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 |
| CN102748557A (en) * | 2012-07-13 | 2012-10-24 | 黄石新兴管业有限公司 | Process method for repair of leaking cast iron pipe fitting with glue |
| CN103542227A (en) * | 2012-07-16 | 2014-01-29 | 西安格林石油科技有限公司 | Method for reinforcing corroded position of pipeline by using carbon fibers |
| CN106995036A (en) * | 2016-01-22 | 2017-08-01 | 江南造船(集团)有限责任公司 | The restorative procedure of rhombus independent liquid cargo tank protective layer |
| CN106995036B (en) * | 2016-01-22 | 2018-11-16 | 江南造船(集团)有限责任公司 | The restorative procedure of diamond shape independent liquid cargo tank protective layer |
| CN106759785A (en) * | 2016-12-23 | 2017-05-31 | 温州市腾方园林建设有限公司 | A kind of green drainage construction tubing in municipal gardens |
| CN106759785B (en) * | 2016-12-23 | 2019-03-05 | 腾方建设有限公司 | A kind of green drainage construction tubing in municipal administration gardens |
| CN107037550A (en) * | 2017-03-21 | 2017-08-11 | 海安南京大学高新技术研究院 | Aramid fiber enhancing core of self-repair function and preparation method thereof |
| CN106958716A (en) * | 2017-05-07 | 2017-07-18 | 中铁十八局集团有限公司 | A kind of PCCP pipe joints caulking joint construction method |
| CN106958716B (en) * | 2017-05-07 | 2019-04-26 | 中铁十八局集团有限公司 | A kind of PCCP pipe joint caulking joint construction method |
| CN109268581A (en) * | 2018-09-06 | 2019-01-25 | 国营芜湖机械厂 | A kind of special-shaped thin wall welding power fuel oil conduit reliability growth method |
| CN111503418A (en) * | 2020-03-23 | 2020-08-07 | 中山大学 | Pressurized plugging composite structure and plugging method for gas leakage of underwater pipe gallery with high-pressure gas around |
| CN111503418B (en) * | 2020-03-23 | 2021-06-22 | 中山大学 | Pressurized plugging composite structure and plugging method for gas leakage of underwater pipe gallery with high-pressure gas around |
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Open date: 20080709 |