Característiques de la canonada HDPE
Jan 18, 2022
HDPE és una bona canonada, no només hauria de tenir una bona economia, sinó que també hauria de tenir una sèrie d'avantatges com ara una interfície estable i fiable, resistència a l'impacte del material, resistència a les esquerdes, resistència a l'envelliment, resistència a la corrosió, etc. En comparació amb les canonades tradicionals, la canonada HDPE El sistema té la següent sèrie d'avantatges:
(1) Connexió fiable: el sistema de canonades de polietilè està connectat per fusió electrotèrmica i la força de la junta és superior a la del cos de la canonada.
(2) Bona resistència a l'impacte a baixa temperatura: la temperatura de fragilitat a baixa temperatura del polietilè és extremadament baixa i es pot utilitzar amb seguretat en el rang de temperatura de -60-60 graus. Durant la construcció a l'hivern, a causa de la bona resistència a l'impacte del material, la canonada no serà trencadissa.
(3) Bona resistència a les esquerdes per tensió: l'HDPE té una baixa sensibilitat a l'osca, una gran resistència a la cisalla i una excel·lent resistència a les ratllades, i la seva resistència a les esquerdes per estrès ambiental també és molt destacada.
⑷Good chemical corrosion resistance: HDPE pipes are resistant to corrosion by a variety of chemical media, and chemical substances in the soil will not cause any degradation to the pipes. Polyethylene is an electrical insulator, so it does not rot, rust or electrochemically corrode; it also does not promote algal, bacterial or fungal growth.
⑸Aging resistance, long service life: polyethylene pipes containing 2-2.5 percent evenly distributed carbon black can be stored or used outdoors for 50 years without being damaged by ultraviolet radiation.
⑹ Good wear resistance: The comparison test of wear resistance of HDPE pipe and steel pipe shows that the wear resistance of HDPE pipe is 4 times that of steel pipe. In the field of mud transportation, compared with steel pipes, HDPE pipes have better wear resistance, which means that HDPE pipes have longer service life and better economy.
⑺Good flexibility: The flexibility of HDPE pipes makes it easy to bend, and in engineering, obstacles can be bypassed by changing the direction of the pipes. In many occasions, the flexibility of the pipes can reduce the amount of pipe fittings and installation costs.
⑻ Small water flow resistance: HDPE pipe has a smooth inner surface, and its Manning coefficient is 0.009. The smooth performance and non-adhesive properties ensure that the HDPE pipe has a higher conveying capacity than traditional pipes, and also reduces the pressure loss of the pipeline and the energy consumption of water conveying.
⑼ Easy to handle: HDPE pipes are lighter than concrete pipes, galvanized pipes and steel pipes. They are easy to handle and install, and lower manpower and equipment requirements mean that the installation cost of the project is greatly reduced.
⑽Various new construction methods: HDPE pipes have various construction techniques. In addition to traditional excavation methods, various new trenchless techniques such as pipe jacking, directional drilling, lining, It is a good choice for some places where excavation is not allowed.
