Pipeline repairing carbon fiber composite material system and application thereof

Abstract

The invention relates to a pipeline repairing carbon fiber composite material system and an application thereof. The pipeline repairing carbon fiber composite material system consists of a defect filling material, an anti-cathodic disbonding insulating primer and a carbon fiber composite material, wherein the defect filling material is used for overcoming pipeline defects; a pipeline defect reinforcing area is coated with the anti-cathodic disbonding insulating primer; an interlayer adhesive is used for coating and soaking carbon fiber cloth and paving a reinforced repairing area; a stainless steel tape is used for fastening and curing a composite material repairing layer; the repairing layer fastened by using stainless steel is cured at room temperature or heated and cured through an external heating belt; the repairing layer is subjected to external anti-corrosion treatment after a heating device and the stainless steel tape are removed; and the phenomena of debonding, lamination, hollowing, cracking, bubbling and the like of the repairing material and a pipe body occurring in the serving process of the repaired repair reinforcing layer can be avoided, construction effectiveness in a cold and wet severe environment is effectively increased, the repairing construction quality and reinforcing repair effect of the composite material are ensured, and the reliability of pipeline defect repairing construction is improved.

Description

technical field [0001] The invention relates to a method for reinforcing and repairing defects on the outer wall of an oil and gas transmission pipeline by using a carbon fiber reinforced resin-based composite material and a composite material system thereof. Background technique [0002] Oil and gas pipeline transportation is one of the five major transportation industries. my country's current oil and gas pipelines have exceeded 70,000 kilometers. Oil and gas pipelines often form various pipe body defects due to corrosion, mechanical damage and other reasons, resulting in accidents such as bursting and leakage of in-service pipelines, which seriously affect the safe operation of the pipeline and the ability of transportation operations. How to effectively detect the detected pipe body defects Ground repair and reinforcement is a key technical measure to ensure the safe operation of pipelines and improve transportation efficiency. Existing pipeline repair technologies incl...

AI Technical Summary

Problems solved by technology

[0003] Based on many years of on-site construction experience and the inspection and research of various repair products to verify the repair effect of the PetroChina Pipeline Research Institute, it was found that after the repair point was reinforced and repaired and backfilled for a period of time, the repair material and the pipe body were debonded, delaminated, and Repair problems such as hollowing, crimping, and boundary ends without seals or incomplete seals. The construction reasons for these problems mainly include incomplete surface treatment of the repair point pipe body, uneven or partial adhesive coating, fiber cloth, etc. Wrinkled winding or insufficient pre-tightening force, no sealing measures at the end of the repair layer, etc.

But at the same time, there are also problems with the material itself, including the brittleness of the defect filling material, poor adhesion between the bottom adhesive and the pipe body, galvanic corrosion of carbon fibers due to conductivity, and poor resistance to cathodic disbonding at the bottom of the repair sleeve.

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