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Pipeline damage rehabilitation method

A damage repair and pipeline technology, which is applied in the field of improvement of existing pipeline repair methods, can solve problems such as unstable repair quality, inability to continue mass production, and low repair efficiency, and achieve the effect of improving flexibility and construction efficiency

Inactive Publication Date: 2008-07-09
BEIJING AVIATION MATERIAL INST NO 1 GRP CORP CHINA AVIATION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Welding repairs, board repairs, and sleeve repairs must be stopped before production can be carried out, which will cause great economic losses
The disadvantages of the hand lay-up composite repair method are: continuous mass production is not possible; repair efficiency is low; repair quality is unstable

Method used

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  • Pipeline damage rehabilitation method
  • Pipeline damage rehabilitation method
  • Pipeline damage rehabilitation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0051] 1. The working pressure of an oil pipeline is 3.0MPa, the working temperature is 50°C, the diameter of the pipeline is 800mm, and the material is cast iron. It is found that there are corrosion pits in a certain area with a maximum diameter of Φ60mm and a maximum depth of 2.5mm, and there are many corrosion spots around the corrosion pits. In-line repair using room temperature curing carbon fiber plain weave reinforced epoxy resin prepreg. The specific repair steps are: 1) First, clean the surface of the damaged area of ​​the pipeline, use acetone to wipe the corrosion damaged area, and use sandpaper to polish some of the more severely corroded areas, but pay attention not to cause major physical damage to the pipeline body; 2) Clean the And the pipeline after the organic solvent is fully volatilized is wrapped with prepreg (resin content is 35%), and a layer of room temperature curing epoxy resin is coated before the prepreg is wrapped. The insurance factor ξ is taken ...

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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 [0001] The invention belongs to pipeline repair technology and relates to the improvement of the existing pipeline repair method. Background technique [0002] Due to the uneven distribution of oil resources, oil and its products need to be transported between different regions through various forms such as pipelines. The repair of pipelines has become an indispensable and regular work in the process of oil and gas gathering and transportation. Every year Both need to invest a lot of human and financial resources. The petrochemical industry and the metallurgical industry require a large number of liquid and gas transportation pipelines, a considerable part of which have been in service for many years and have failed to varying degrees and need to be updated, modified, and overhauled. The current pipeline repair technology mainly includes repair welding, patch repair, sleeve and hand lay-up composite repair methods. Welding repairs, board repairs, and sleeve...

Claims

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Application Information

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IPC IPC(8): F16L55/175B08B9/027
Inventor 钟翔屿包建文李晔
Owner BEIJING AVIATION MATERIAL INST NO 1 GRP CORP CHINA AVIATION IND
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