FRP Sand pipe has become a good choice for chemical industry and water conveyance engineering due to its excellent corrosion resistance, food grade performance, light weight and high strength, large transmission flow, convenient installation, short construction period and low comprehensive investment. It has other Metal Pipe There is no comparative advantage. Fiber winding FRP sand pipe has reliability, safety and economy. It is mainly used for buried pipes and long-distance pipelines. It has the characteristics of light weight, high strength, corrosion resistance, long service life, low operation and maintenance costs, and can save a lot of money for construction projects.
1、 Characteristics of Guangxi Yongsheng GRP sand pipe
1. Light weight and high strength: the specific gravity of GRP sand pipe is 1.65~ 2.0。 For the weight per unit length of the same pipe diameter, only 1/3 of carbon steel and only 1/3 of FRP pipe Cast iron pipe 1/5 and 1/10 of the prestressed concrete pipe, reducing the hoisting cost and improving the installation speed.
2. Good hydraulic characteristics: this characteristic is particularly prominent in the field of water supply and drainage, and its hydraulic characteristics are good.
(1) It can save pipe network pumping cost. (2) Reduce pipe size. (3) Shorten pumping time.
(4) The FRP pipe will not scale and need no cleaning for long-term water delivery, so that the water quality will not be subject to secondary pollution.
3、 Good water resistance and corrosion resistance: FRP sand pipe has excellent corrosion resistance, which reduces corrosion protection costs and extends service life; At the same time, the water quality is not subject to secondary pollution due to non rusting. It can also be used to transport sewage, mud, seawater and other media.
4. Pressure resistance: design, manufacture pipes and pipe fitting The hydraulic test shall be conducted at 1.5 times of the pressure required by the process.
5. Interface seal up Good performance, no leakage, no fracture, and increase the safety and reliability of water supply.
6. It is non-toxic and can be used to transport drinking water.
2、 Application of Guangxi Yongsheng FRP sand pipe
◆ Drinking water transmission trunk pipe and distribution Water pipe
◆ Sewage pipeline and rainwater pipeline
◆ Agricultural irrigation pipes
3、 Main forming process
Under the control of computer, the lining is manufactured on the core mold according to the same process as that of filament wound FRP pipe. After gel, the structural layer is wound according to the designed line type and thickness, and Quartz sand And resin Mixed mortar Wrap in the structural layer, * * and then wrap the outer protective layer.
4、 Raw and auxiliary materials: resin, chopped fiber, continuous glass fiber and quartz sand.
5、 Product specification
Diameter: DN100-4000
Pressure rating: 0.1MPa, 0.6MPa, 1.0MPa, 1.6MPa, 2.0MPa, 2.5MPa
Stiffness grade: SN1250 SN2500、SN5000、SN10000。
Length: 6m, 12m
[Good heat and cold resistance]
Under the condition of - 30 ℃, it still has good toughness and extremely high strength, and can be used for a long time in the range of - 50 ℃ - 80 ℃. The resin with special formula can also work at temperatures above 110 ℃.
[Good wear resistance]
The abrasion resistance of GRP pipes is very good. The test proves that the water containing a large amount of mud and sand is put into the pipes for a comparative test of rotating abrasion effects. After 300000 rotations, the wear depth of the inner wall of the pipe is tested as follows: the steel pipe coated with tar and porcelain oil is 0.53mm; The surface hardened steel pipe is 0.48mm; The GRP pipe is 0.21mm, which indicates that the abrasion resistance of GRP pipe is very strong.
[Excellent thermal insulation performance]
As the thermal conductivity of FRP products is low, its thermal insulation performance is particularly good.
[No toxicity, no secondary pollution]
No scaling, rust, algae and other microorganisms are generated in the process of use, cathodic protection and other protective measures are not required, and secondary pollution to water quality or other media will not occur.
[Small specific gravity, light weight]
Sand filled FRP pipes produced by filament winding have a specific gravity of 1.65-2.0, which is only 1/4 of steel. However, the circumferential tensile strength of FRP pipes is 180-300MPa, and the axial tensile strength is 60-150MPa, which is similar to alloy steel. Therefore, its specific strength (strength/specific gravity) is 2-3 times that of alloy steel, so that it can be designed to meet various requirements of internal and external pressure according to different requirements of users. For the single weight of the same pipe diameter, the FRP pipe is only 1/2.5 of carbon steel pipe (steel plate coiled pipe), 1/3.5 of cast iron pipe, and about 1/8 of prestressed reinforced cement pipe, so the transportation and installation are very convenient.
[Few interfaces, high installation efficiency]
The length of pipes is generally 6-12m/piece (special length pipes can also be produced according to customer requirements). A single pipe is long and the number of interfaces is small, thus speeding up the installation speed, reducing the failure probability and improving the installation quality of the whole pipeline.
[Good mechanical performance and excellent insulation performance]
The tensile strength of pipes is lower than that of steel, higher than that of ductile iron pipes and concrete pipes, and the specific strength is about 3 times that of steel pipes, 10 times that of ductile iron pipes, and 25 times that of concrete pipes. In addition, its thermal conductivity is only 1% of that of steel pipe. It has excellent insulation and is suitable for use in areas with dense power transmission and telecommunication lines and areas with frequent lightning.
[Excellent hydraulic performance and energy saving]
Sand filled glass fiber reinforced plastic pipe has smooth internal surface, which is suitable for large diameter (≥ φ 500mm) water transmission pipeline. It has small friction coefficient, good hydraulic fluid characteristics, and the larger the pipe diameter, the more obvious its advantages. On the contrary, under the condition of the same pipeline transportation flow, the sand filled glass fiber reinforced plastic pipe with smaller inner diameter can be used in the project instead, thus reducing the one-time project investment. Compared with other pipes, the sand filled FRP pipe can greatly reduce the loss of pressure head and save the power and energy of the pump.
[Long service life, safe and reliable]
The design safety factor of sand filled FRP pipe is high. According to the simulation test table in the laboratory, the service life of general water supply and drainage FRP pipes with sand can reach more than 50 years, twice that of steel pipes and concrete pipes. For medium with strong corrosivity, its service life is much longer than that of steel pipe.
[Flexible design and strong product adaptability]
Sand filled FRP pipes can be manufactured into products of various specifications, pressure levels, stiffness levels or other special properties by changing the design according to various special use requirements of users, with a wide range of applications.
[Low operation and maintenance costs]
As FRP products have good corrosion resistance, they do not need regular anti-corrosion and other maintenance like metal products.
[Good comprehensive benefits of the project]
Comprehensive benefits refer to the long-term nature formed by various factors such as construction investment, installation and maintenance costs, service life, energy saving and steel saving. The comprehensive benefits of FRP pipes are desirable, especially the larger the pipe diameter, the lower the cost. When it is further considered that the buried pipeline can be used for several generations without annual maintenance, its superior comprehensive benefits can be brought into play.
