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BEIHAI YUEDA FRP PRODUCTS
What are the differences between FRP pipes and glass fiber reinforced plastic (GRP) sand-coated pipes?
Release time:
2022/12/22
What is the difference between FRP pipes and sand-coated fiberglass pipes? In fact, sand-coated fiberglass pipes are made by adding a layer of sand in the middle of the fiberglass pipe during its production to increase the rigidity of the pipe. Whether sand coating is needed depends on the pressure, rigidity, and other conditions used in the pipeline design.
What is the difference between FRP pipes and glass fiber reinforced sand pipes?
In fact, glass fiber reinforced sand pipes are made by adding a layer of sand in the middle of the glass fiber reinforced pipe to increase the rigidity of the pipe. Whether sand reinforcement is needed depends on the pressure, rigidity, and other conditions used in the pipeline design. If the thickness of the pipe can meet the requirements for pressure and rigidity, sand reinforcement is usually not needed. If the thickness of the pipe can meet the pressure requirements but not the rigidity requirements, sand reinforcement will be chosen to increase the thickness to meet the rigidity needs (of course, the thickness can also be directly increased without sand reinforcement to meet the rigidity requirements, but the cost is too high). Compared toFRP pipes, glass fiber reinforced sand pipes only have one layer of sand reinforcement, which can be understood as replacing glass fiber with quartz sand. Sand pipes of the same thickness are cheaper than glass fiber reinforced pipes, but have lower strength; the situation is exactly the opposite for FRP pipes.
Glass fiber reinforced sand pipes have a smooth inner surface, suitable for large diameter(≥ φ500mm) water supply pipelines, which have the advantages of low friction coefficient, good hydraulic fluid characteristics, and increasingly obvious benefits as the pipe diameter increases. Conversely, in cases where the pipeline conveys the same flow, this project can switch to sand-filled glass fiber reinforced pipes with a smaller inner diameter, thereby reducing one-time project investment. Compared to other pipelines, sand glass reinforced plastic pipes can significantly reduce head loss, saving pump power and energy. The tensile strength of the pipe is lower than that of steel, higher than that of ductile iron pipes and concrete pipes, while the specific strength is about 3 times that of steel pipes, 10 times that of ductile cast iron pipes, and 25 times that of concrete pipes. In addition, its thermal conductivity is only 1% of that of steel pipes. It has good insulation properties, making it suitable for areas with dense power transmission and telecommunications lines as well as areas with frequent lightning. By changing the design according to various special user requirements, sand glass reinforced plastic pipes can be manufactured into products of various specifications, pressure ratings, rigidity levels, or other special performance, with a wide range of applications.
Due to the good corrosion resistance of glass fiber reinforced products, there is no need to take measures for rust prevention, pollution prevention, thermal insulation, etc., and maintenance is not required for buried pipelines, which can save a lot of maintenance costs. Comprehensive benefits refer to the long-term effects formed by many factors such as construction investment, installation and maintenance costs, service life, energy saving, and steel saving.The comprehensive benefits of FRP pipes are ideal, especially as the pipe diameter increases, the cost decreases. When further considering that buried pipelines can be used for several generations without annual maintenance, their superior comprehensive benefits can be realized. GRP sand pipes have strong resistance to external loads and can be directly buried under roadways without the need for a concrete protective layer, speeding up construction progress and significantly reducing construction costs, resulting in significant socio-economic benefits.
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