Steel pipeline corrosion proof reinforcing method

An anti-corrosion and pipeline technology, applied in pipeline anti-corrosion/rust protection, pipeline protection, pipe components, etc., can solve the problem that metal rings are susceptible to acid and alkali, and electrochemical corrosion, can not react synchronously, and have insufficient tensile strength. Advanced problems, to achieve the effect of light weight, easy promotion and application, and obvious effect

Inactive Publication Date: 2008-11-19
上海华夏化工材料有限公司
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Problems solved by technology

Since the tensile strength of the FRP composite material is not high, the elastic modulus is only about 100GPa, which is much lower than the elastic modulus of steel (generally 200GPa). It can only play the role of anti-corrosion repair, and the reinforcement effect is poor
Another traditional method is to use a metal ring to reinforce the pipeline, but the metal ring is susceptible to acid, alkali, and electrochemical corrosion, and the size of the metal ring is fixed, which is inconvenient to use and high in cost

Method used

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Embodiment Construction

[0010] The epoxy vinyl ester resin that the present invention uses is the commercially available product that East China University of Science and Technology Huachang Polymer Co., Ltd. produces, and cobalt naphthenate liquid (accelerator) and methyl ethyl ketone peroxide (initiator) are epoxy vinyl ester resin The supporting supply products, the basic technical indicators are: heat distortion temperature 100 ℃, elongation 5%, tensile strength 65MPa, tensile modulus 3200MPa, shear strength of steel and steel 12.5MPa; the carbon fiber cloth used is acrylonitrile-based 12K Or unidirectional or bidirectional carbon fiber cloth woven with continuous small tow carbon fiber filaments below 12K, which is a product of Shanghai Yichang Carbon Fiber Material Co., Ltd., with a mass per unit area of ​​≤300g / m 2 , the resin is easy to infiltrate and has a high specific strength.

[0011] An anti-corrosion reinforcement method for steel pipelines, comprising the following steps:

[0012] (1...

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PUM

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Abstract

The invention relates to a method for reinforcing and antisepticising steel pipeline, comprising the following steps of: processing the surface of steel pipeline to be reinforced and antisepticised, preparing epoxy ethylene resin and resin mortar, using the mortar to fill and block the crack and perforation part of the pipeline, sticking bidirectional carbon fiber cloth on the patching part, finally winding and sticking the unidirectional carbon fiber cloth on the pipeline in circularity when the surface of the pipeline is being coating by the prepared resin, the direction of the carbon filament should be right angle of 90 degrees with the axes of the pipeline, and then winding and brushing, recoating a layer of resin surface layer after the surface of the resin gel is dry. The invention has the advantages that the adopted carbon fiber epoxy ethylene resin composite material system has the excellent performances of high strength, light weight, corrosion resistance and humidity resistant, evident dual effect of reinforcing and antisepticising, and practical and reliable method for patching crack and perforation, which can greatly prolong the service life of the pipeline.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion and reinforcement of steel pipelines, and in particular relates to a method for anti-corrosion and reinforcement of steel pipelines with carbon fiber composite materials. Background technique [0002] Steel pipeline transportation technology is widely used in the chemical industry, but the steel pipeline itself is susceptible to corrosion by the internal medium, electrochemistry and the external environment. In addition to the influence of various factors such as deformation caused by internal pressure of the pipeline, the pipeline is easy to crack and perforate, and eventually Lead to pipeline leakage, affecting normal production and use. The traditional way to prolong the service life of pipelines is to use FRP composite materials to prevent corrosion of pipelines. Since the tensile strength of the FRP composite material is not high, the elastic modulus is only about 100GPa, which is muc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L58/02F16L55/16
Inventor 周平李岿然张蕙兰石春利
Owner 上海华夏化工材料有限公司
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