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Method for reinforcing corroded position of pipeline by using carbon fibers

A carbon fiber and pipe technology, applied in the direction of pipe components, pipes/pipe joints/fittings, coatings, etc., can solve the problems of increased cost, poor repair effect, short service life, etc., to improve service life, reduce stress, reduce risk effect

Inactive Publication Date: 2014-01-29
西安格林石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reinforcing by welding or clamping method requires hot fire and stops pipeline transportation, which will increase the cost, and the service life is short and the repair effect is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for reinforcing a corroded part of a pipeline with carbon fibers, comprising the following steps:

[0024] Firstly, derust the outer surface of the corroded part of the pipeline, and the rust removal range exceeds at least 130mm outside the corroded part;

[0025] Secondly, roughness treatment is carried out on the surface of the pipeline after derusting, so that the surface of the biological pipeline to be repaired remains rough;

[0026] Thirdly, clean the parts to be repaired, keep them clean and free of dirt, and apply repair agent on the corroded parts, and cure for 30 minutes at a curing temperature of 25°C, and fill the corroded parts;

[0027] Fourth, coat a layer of epoxy primer with a thickness of 0.4mm on the outside of the repair agent, and wrap PerpeWrapTM ST85 material outside the epoxy primer as a reinforcing layer, and coat the winding surface of PerpeWrapTM ST85 material with glue .

Embodiment 2

[0029] A method for reinforcing a corroded part of a pipeline with carbon fibers, comprising the following steps:

[0030] Firstly, derust the outer surface of the corroded part of the pipeline, and the rust removal range exceeds at least 140mm outside the corroded part;

[0031] Secondly, roughness treatment is carried out on the surface of the pipeline after derusting, so that the surface of the biological pipeline to be repaired remains rough;

[0032] Thirdly, clean the parts to be repaired, keep them clean and free from dirt, and apply a repair agent on the corroded parts, and cure for 120 minutes at a curing temperature of 80 ° C, and fill up the corroded parts;

[0033] Fourth, coat a layer of epoxy primer with a thickness of 0.6mm on the outside of the repair agent, and wrap PerpeWrap TM ST85 material outside the epoxy primer as a reinforcing layer, and coat the winding surface of PerpeWrap TM ST85 material with glue .

Embodiment 3

[0035] A method for reinforcing a corroded part of a pipeline with carbon fibers, comprising the following steps:

[0036] Firstly, derust the outer surface of the corroded part of the pipeline, and the rust removal range exceeds at least 130mm outside the corroded part;

[0037] Secondly, roughness treatment is carried out on the surface of the pipeline after derusting, so that the surface of the biological pipeline to be repaired remains rough;

[0038] Thirdly, clean the parts to be repaired, keep them clean and free from dirt, and apply repair agent on the corroded parts, and cure for 70 minutes at a curing temperature of 65°C, and fill up the corroded parts;

[0039] Fourth, coat a layer of epoxy primer with a thickness of 0.7mm on the outside of the repair agent, and wrap PerpeWrap TM ST85 material outside the epoxy primer as a reinforcing layer, and coat the winding surface of PerpeWrap TM ST85 material with glue .

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Abstract

Provided is a method for reinforcing a corroded position of a pipeline by using carbon fibers. The method comprises the following steps that firstly, rust removal is conducted on the outer surface of the corroded position of the pipeline, and the rust removal range exceeds the outer side of the corroded position by at least 100mm; secondly, roughness processing is conducted on the surface undergoing rust removal so that the surface of the biological pipeline to be repaired can keep definite roughness; thirdly, a position to be repaired is cleaned and kept clean and free of pollutant, the corroded position is coated with a layer of repair agents, curing time ranges from 30 minutes to 120 minutes, curing temperature ranges from 25 DEG C to 80 DEG C, and the corroded position is filled up; fourthly, the outside of the repair agents is coated with a layer of epoxy primer, and a carbon fiber composite reinforcing layer is arranged outside the epoxy primer. The method has the advantages that the service life of the pipeline is prolonged, the reinforcing effect is good and processes are simple.

Description

technical field [0001] The invention belongs to the technical field of reinforcing corrosion parts of pipelines, and in particular relates to a method for reinforcing corrosion parts of pipelines with carbon fibers. Background technique [0002] Pressure pipelines have many defects due to corrosion, mechanical damage and other reasons during service. These defects reduce the strength of the pipeline, making its bearing capacity unable to reach the original design pressure. These defects seriously threaten the safe operation of the pipeline. The radial expansion of the pipe due to internal pressure produces hoop tensile stress in the pipe wall. Stress concentration will occur in the area of ​​pipe wall thinning (such as corrosion pit), and when the stress here is greater than the tensile strength limit of the material, crack failure and leakage will occur there. [0003] In order to repair the defects, welding or fixture methods are generally used for repairing at present. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/175F16L58/10
CPCF16L55/175F16L58/1072
Inventor 王环宇
Owner 西安格林石油科技有限公司
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