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BEIHAI YUEDA FRP PRODUCTS
Precautions for the Use of Fiberglass Reinforced Plastic Pipes
Release time:
2021/11/30
Due to the relatively low density of fiberglass pipes, the material is quite uniform, which makes it very easy for floating pipes to occur during installation in areas with high groundwater levels. Therefore, it is necessary to consider implementing anti-floating measures such as setting up rainwater runoff drainage for the fiberglass pipes. When repairing cracks or performing construction work such as installing tees on already installed fiberglass pipes, it is required to maintain completely dry conditions. Additionally, the resin and fiber cloth used during the construction process need to cure for 7 to 8 hours.
Due to the relatively low density of fiberglass pipes, the material is quite uniform, which can easily lead to floating pipes during installation in areas with high groundwater levels. Therefore, it is necessary to consider anti-floating measures such as setting up rainwater runoff diversion for fiberglass pipes. When repairing cracks or performing construction work such as installing tees on already installed fiberglass pipes, it is required to maintain completely dry conditions, and the resin and fiber cloth used during construction need to cure for 7 to 8 hours.
If construction is done on-site, it is very difficult to meet this requirement during repairs. The existing underground pipeline detection equipment mainly works by detecting metal pipelines, and the price of such detection instruments is relatively high. Therefore, fiberglass pipes cannot be detected once buried, and during subsequent construction, it is very easy to damage the pipes.
Due to the poor UV resistance of fiberglass pipes, fiberglass pipes exposed directly to the environment can delay aging by creating a resin layer approximately 0.5 mm thick on the surface and adding UV absorbers. However, as the operating time of the fiberglass pipes increases, the UV absorbers and resin layer will be damaged by the environment, affecting the service life of the fiberglass pipes, necessitating timely repair work. Fiberglass pipes have high requirements for soil cover depth; generally, the soil cover for fiberglass pipes under roadways should not be less than 0.8 mm and not exceed three meters. The backfill soil should not contain large bricks, stones, or other hard objects to avoid damaging the outer wall of the pipes.
The main reason for bubbling after the fiberglass pipe cures is that the volatile content of the adhesive tape is too high, while the winding temperature is low and the winding speed is fast, causing the volatiles to not evaporate in time and remain in the pipe. When the pipe is heated and cured, the residual volatiles heat up, causing bubbling in the pipe.
Solution: Control the volatile content of the adhesive tape, appropriately increase the winding temperature, and slow down the winding speed. The reason for wrinkling after the pipe cures is that the adhesive content of the tape is high.
Solution: Appropriately reduce the adhesive content of the tape and lower the winding temperature.
Voltage resistance issue
Causes: ① Insufficient tension of the adhesive tape during winding, low winding temperature, or fast winding speed, resulting in poor bonding between the layers and a high residual volatile content in the pipe; ② Incomplete curing of the pipe.
Solution: ① Increase the tension of the adhesive tape, raise the winding temperature, or slow down the winding speed; ② Adjust the curing process to ensure the pipe is fully cured.
From the above description, it is believed that the readers present have a basic understanding of the precautions for using fiberglass pipes, and it is hoped that this will be helpful to everyone.
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