Fiberglass reinforced plastic (FRP) is a composite material made of glass fiber and its products (glass cloth, tape, felt, yarn, etc.) reinforced with synthetic resin as matrix material. According to the different fibers can be divided into glass fiber reinforced composite plastics (GFRP), carbon fiber reinforced composite plastics (CFRP), boron fiber-reinforced composite plastics. FPR tubes are made by the process of constant length winding, centrifugal casting and continuous winding. fiberglass pipe is characterized in strong corrosion resistance, smooth surface, conveying low energy consumption, long service life (above 50 years), transportation convenient installation, low maintenance cost and low comprehensive cost, has been widely used in the oil, electric power, chemical industry, papermaking, urban water supply and drainage, sewage treatment and seawater desalination plant and gas conveying industries.
Advantages of fiberglass reinforced plastic pipe
Good corrosion resistance. As the main raw materials of FRP are unsaturated polyester resin and glass fiber, which can effectively resist the corrosion of acid, alkali, salt and other media and the erosion of untreated sewage, corrosive soil, chemical wastewater and many chemical liquids, it has become the main material of Chlor-alkali industry.
Good aging resistance and heat resistance. Fiberglass tube can be used in the temperature range of -40℃ ~ 70℃ for a long time, and the reinforced resin can even reach more than 200℃. The ultraviolet absorbent is added to the outer surface of the open-air pipeline to eliminate the ultraviolet radiation to the pipeline and delay the aging of the FRP pipeline. The excellent corrosion resistance of FRP means that this material has the property of being lively and non-polluting, which makes it a natural material for highly clean goods such as storing high purity water, medicine, wine, milk, etc.
Good anti-freezing performance. The freezing crack will not occur after freezing in the tube below minus 20℃.
Lightweight and convenient transportation. Fiberglass reinforced plastic tube is not only lightweight, high strength, strong plasticity, easy to transport and installation, but also easy to install a variety of branch pipe.
Small flow resistance inside the tube. The smooth inner wall, strong conveying capacity, small water resistance, will not cause scale and rust.6. Good design ability. The glass steel tube can be designed and manufactured into different pressure classes and stiffness classes according to the user's specific requirements, such as flow rate, pressure, burial depth and load conditions.
7. Low maintenance cost. Due to its excellent corrosion resistance, abrasion resistance, frost resistance and pollution resistance, FRP tubes do not need rust prevention, pollution prevention, insulation, insulation and other measures and maintenance. The buried pipe does not need cathodic protection, which can save more than 70% of maintenance cost.
Good abrasion resistance. Put the water contains a lot of mud and sand into FPR pipe rotation wear effect comparison test, after 3 million times rotating tube wall wear depth is as follows: the tar and enamel coating of steel pipe is 0.53 mm, with epoxy resin and tar coating of steel pipe is 0.52 mm, the surface hardening treatment of FRP pipe is 0.21.
Good thermal insulation. Fiberglass reinforced plastic as a non-conductor, insulation resistance Ω. 1012 ~ 1015 cm, the heat transfer coefficient is 0.23, is five over one thousand of the steel, excellent piping insulation performance, the most adapted to use in power transmission, telecommunications line concentration areas and more minefield.
High conveying capacity. The smooth glass inner wall of the steel tube provides very little roughness and friction resistance. The roughness coefficient is 0.0084, while the concrete pipe is 0.014 and the cast iron pipe is 0.013, so the glass pipe can significantly reduce the fluid pressure loss through, improving the conveying capacity: the optional small diameter FRP pipe reduces the one-time input cost and pumping cost. In addition, the FRP pipe can shorten the pumping time.
Disadvantages of fiberglass reinforced plastic pipe
Low elastic modulus. The elastic modulus of FRP is two times larger than that of wood, but 10 times smaller than that of steel (E=2.1×106). Therefore, it is not rigid enough and easy to be deformed in the structural application. It can be made into the thin-shell structure, insulation sandwich structure, and can also be made up through high-modulus fiber or reinforcement bar.
Poor long-term temperature resistance. FRP cannot be used under high temperature for a long time, the strength of polyester FRP decreases obviously when it is above 50℃, and it is generally only used under 100℃. The strength of epoxy FRP decreases obviously above 60℃. High-temperature resistant resins make long - term operating temperature in 200-300℃ is possible.
The aging. The phenomenon of aging is a common defect of plastics as well as FRP. Its performance will be reduced because of ultraviolet, wind yarn rain and snow, chemical media, mechanical stress and other factors.
We supply and manufacture high-quality pre-insulated steel pipes in accordance with EN, DIN, ASTM, GB standards for applications like Chilled Water, Condensate, Domestic Water, Heating Hot Water, Petroleum Products and Potable Water, which specified delivery conditions and final customer specifications for industrial and commercial applications. We also supply FRP insulation pipe which is generally composed of a fiberglass outer protective layer, rigid polyurethane foam plastic insulation layer and internal steel pipe. More information, Call us today!