What is the compressive strength of all kinds of FRP materials?
Anti fouling and anti moth: unsaturated polyester resin surface clean and smooth, will not be ocean or sewage in the shellfish, fungi and other microorganisms stained, moth, so as to increase roughness, reduce water cross section, increase maintenance costs. FRP pipes are free from these pollution and are clean for a long time. At the same time, because of its smooth inner wall and excellent corrosion resistance, it will not cause scale and microbial growth, effectively guarantee water quality and maintain the stability of water resistance. But the traditional pipe still exist after water resistance increases and the surface fouling phenomenon.
Good corrosion resistance, no impact on water quality: FRP pipe can resist acid, alkali, salt, sea water, untreated sewage, corrosive soil or groundwater and many chemical fluids erosion. The service life of the pipe is longer than that of the traditional pipe, and the designed service life is more than 50 years. Of fiberglassreinforcedplastic pipe, is more used in municipal, city pipeline network, due to its non-toxic, tasteless, no rust, no two pollution on water quality, no corrosion, greatly prolong the service life, convenient installation and other advantages, therefore, by the water supply and drainage industry welcome.
Heat resistance, frost resistance: at -30 DEG C, still has good toughness and high strength, can be used for a long time in the range of -50 DEG C 80 DEG C, the temperature of resin with special formula can be more than 110 DEG C. 4) of light weight, high strength, convenient transportation and installation by fiberglassreinforcedplastic pipe winding fiber production, the proportion of 1.65 - 2, 1 / 4 only of steel, but the glass steel hoop tensile strength is 180 300MPa, the axial tensile strength of 60 150MPa, similar to alloy steel. Therefore, its specific strength (strength / density) is 2-3 times that of alloy steel, so that it can be designed according to different requirements of users to meet all kinds of internal and external pressure requirements of the pipeline. For the same diameter of single FRP tube, only carbon steel (steel plate) 1 / 2.5, 1 / 3.5 of the cast iron pipe, about 1 / 8 of prestressed reinforced concrete pipe, so the transportation is very convenient for installation. The GRP pipe is 12 meters per length, and can be reduced by 2/3 from the concrete pipe. The socket connection mode of the utility model has the advantages of quick and simple installation, low hoisting cost and improved installation speed. 5) small friction resistance, high transport capacity: glass tube wall is very smooth, roughness and friction resistance is very small. The roughness coefficient is 0.0084, while the n value of concrete pipe is 0.014, and the cast iron pipe is 0.013. Therefore, glass fiber reinforced plastic pipe can significantly reduce the loss of fluid pressure along the course and improve the conveying capacity.
