Reinforced plastics with glass fibres or their products as reinforcement materials. Title for glass fiber reinforced plastic, or the title of FRP. As a result of the use of different resin varieties, there are polyester fiberglass, epoxy FRP, phenolic FRP said. Glass is hard and brittle, with good transparency and high temperature, corrosion resistance and so on, while the steel is very hard and brittle, but also has the characteristics of high-temperature resistance. So people began to think that if they could make a glass of hardness, high-temperature, corrosion-resistant properties, and steel as hard as the characteristics of the same, then this material will be very useful. People have finally produced such a composite material through research and experiment. It is the FRP pipe that can shoulder with steel.
FRP pipe with its unique strong corrosion resistance, smooth inner surface, low energy consumption, long service life (over 50 years), convenient transportation and installation, low maintenance cost and comprehensive cost, etc. many advantages in petroleum, electricity, chemical, papermaking, urban water supply and drainage, factory sewage treatment, seawater desalination, Gas transportation and other industries have been widely used.
As China's urbanization process accelerates, in the face of the balance and protection of population, resources and environment, Governments at all levels are increasing their investment in urban infrastructure, combining advanced science and technology needs, the variety and specification of pipe and pipe are continuously enriched, the production is increasing, the quality is increasing, especially the plastic pipe is developing faster, and it becomes the hot spot Fiberglass tube is one of them.
wherein the rigidity grade is sn=ei/d3, usually min as the unit. EI is the Tibi bending stiffness in the unit length along the direction of the tube axis, and the D is the pipe mean diameter. The pressure grade PN has 0.1, 0.6, 1.0, 1.6, 2.0, 2.5MPA, the rigidity grade SN has 1250, 2500, 5000, 10000n/m2.
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