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BEIHAI YUEDA FRP PRODUCTS
Precautions for the installation of fiberglass pipes
Release time:
2021/08/14
Fiberglass pipes, also known as fiberglass reinforced sand pipes (RPM pipes), are primarily made from fiberglass as the main reinforcing material, with unsaturated polyester resin, polyurethane resin, and other nano-materials as the core raw materials. Inorganic non-metallic particles such as quartz sand and calcium carbonate are used as fillers. Fiberglass pipes are widely used in industries such as petrochemical, electric power, chemical, papermaking, urban water supply and drainage projects, industrial wastewater treatment in factories, seawater desalination, and gas transportation due to their unique characteristics, including strong corrosion resistance, smooth inner surface, low energy consumption during transportation, long service life (over 50 years), convenience in construction and transportation, low maintenance costs, and overall budget efficiency. As urbanization in China accelerates, the government at all levels is gradually increasing investment in urban infrastructure to balance and protect population, resources, and the environment. With the comprehensive development of scientific and technological standards, the types and specifications of pipes and fittings are gradually improving, total output is continuously increasing, and product quality is consistently improving. In particular, the rapid development of plastic pipes has become a current investment hotspot, with fiberglass pipes being one of them. Here are some installation precautions: 1. Due to their low density and lightweight materials, fiberglass pipes can easily float when working in areas with high water levels. It is necessary to take anti-floating measures such as installing anchor blocks or directing rainwater runoff. 2. When opening tees or repairing pipe cracks on installed fiberglass pipes, the standard requires conditions similar to those in a dry workshop, and the resin and fiberglass cloth used in construction need 7-8 hours to cure. However, on-site construction and repairs usually cannot meet these standard requirements. 3. Existing underground pipeline detection equipment mainly detects metal pipelines, while non-metal pipeline detection instruments are relatively expensive. As a result, buried fiberglass pipes cannot be detected, making it easy for subsequent construction teams to accidentally damage the pipes during their work. 4. Fiberglass pipes have poor UV resistance. Exposed fiberglass pipes can delay aging by applying a 0.5mm thick resin-rich layer and UV absorbers (processed in the factory) on their surface. However, over time, the resin-rich layer and UV absorbers may degrade, affecting their service life. 5. The depth requirements for backfilling are quite high. Generally, for SN5000 grade fiberglass pipes under roadways, the shallowest backfill should not be less than 0.8m, and the deepest should not exceed 3.0m; for SN2500 grade fiberglass pipes, the shallowest backfill should not be less than 0.8m, and the deepest should not exceed 1.2m (for 12mm thick steel plate rolled pipes, the minimum and maximum backfill depths are 0.7m and 4.0m, respectively). 6. Backfill should not contain hard particles larger than 50mm, such as bricks and stones, to avoid damaging the outer wall of the pipes. 7. To date, there have been no reports regarding the use of fiberglass pipes in large-scale water supply projects in China. As fiberglass pipes are innovative, their ultimate service life remains uncertain.
Fiberglass pipeAlso known as fiberglass winding sand pipe (RPM pipe). It is usually made of fiberglass and its products as the main reinforcing material, with unsaturated polyester resin, polyurethane resin, and other nano-materials as the core main raw materials, and quartz sand and calcium carbonate as the main fillers.
Fiberglass pipeDue to its unique strong corrosion resistance, smooth inner surface, low energy consumption during transportation, long service life (over 50 years), convenience in construction and maintenance, and low overall budget costs, it has been widely used in industries such as petrochemical, electric power, chemical, papermaking, urban water supply and drainage projects, industrial wastewater treatment in factories, seawater desalination, and gas transportation.
Today, the urbanization development in our country is accelerating. In facing the balance and protection of population, resources, and environment, governments at all levels are gradually increasing investment in urban infrastructure. With the comprehensive development of scientific and technological standards, the types and specifications of pipes and fittings are gradually improving, total output is continuously increasing, and product quality is continuously improving, especially plastic pipes, which have progressed faster and become a current investment hotspot.Fiberglass pipeThis is one of them.
Here are some installation precautions.
1. Due to the low density and lightweight materials, fiberglass pipes can easily float when working in areas with high water levels, so it is necessary to pay attention to anti-floating measures such as installing anchor blocks or rainwater drainage.
2. When opening tees or repairing pipe cracks on installed fiberglass pipes, the specifications require conditions similar to those in a dry factory, and the resin and fiber cloth used during construction need to cure for 7-8 hours, while on-site construction and repairs usually cannot meet these specifications.
3. Existing underground pipeline detection equipment usually focuses on detecting metal pipelines, while non-metal pipeline detection instruments are relatively expensive, making it impossible to detect buried fiberglass pipes. Other subsequent construction teams can easily damage the pipes during construction.
4. Fiberglass pipes have poor UV resistance. Exposed fiberglass pipes can delay aging by creating a 0.5mm thick resin-rich layer and UV absorbers on their surface (processed in the factory). Over time, the resin-rich layer and UV absorbers may be damaged, affecting their service life.
5. The depth specifications for backfilling are quite high. Generally, for SN5000 grade fiberglass pipes under roadways, the shallowest backfill should not be less than 0.8m; the deepest backfill should not exceed 3.0m; for SN2500 grade fiberglass pipes, the shallowest backfill should not be less than 0.8m; the deepest backfill should not exceed 1.2m (the minimum and maximum backfill for 12mm thick steel plate rolled pipes are 0.7m and 4.0m, respectively).
6. The backfill should not contain hard particles larger than 50mm, such as bricks and stones, to avoid damaging the outer wall of the pipe.
7. There have been no reports regarding the use of fiberglass pipes in large-scale water companies in our country, and since fiberglass pipes are innovative pipelines, their ultimate service life remains unknown.
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