Pipelines play an important role in industrial production and residents’ lives, but corrosion and damage will occur during the operation of pipelines. Methods for strengthening and repairing pipelines include welding, pipe replacement, and fixture reinforcement. However, changing the pipe requires a large amount of work, which is time-consuming and expensive. When dealing with flammable and explosive materials such as natural gas, petroleum, and chemical solvents, welding will generate sparks, which poses a very large safety hazard.
With fiber reinforced technology widely used in pipeline reinforcement and repair.
Among them, the advantages of strengthening and repairing pipelines with carbon fiber cloth are as follows:
1. The elastic modulus of carbon fiber is very close to that of steel, which is conducive to the composite material to bear the pressure of the pipeline as much as possible, reduce the stress level of the pipeline with defects, and limit the expansion and deformation of the pipeline;
2. No welding and no fire, can be repaired under pressure operation;
3. The thickness of the reinforcement layer of carbon fiber composite material is small, which is convenient for subsequent anti-corrosion treatment;
4.Carbon fiber reinforced winding and laying methods are flexible. It can reinforce girth welds and spiral weld defects (including high weld reinforcement and serious misalignment); it can also repair irregular pipe fittings such as elbows, tees, and large and small heads;
5. The construction is simple and fast, and the operation time is short;
6. Carbon fiber is high, and it is extremely safe to repair pipes; and the creep resistance performance of carbon fiber composite materials
7. It can repair and repair defects such as rot, mechanical damage and cracks, and can also enhance the pressure of the entire pipe section, with a wide range of applications.