Professional manufacturer of plastic corrugated pipes in Zhoushan, Zhejiang 15933187015

内径：

50mm

Prestressed plastic corrugated pipes
are mainly used in post-tensioned prestressed concrete
structures and holes in components. The plastic produced by our factory is made of high-density polyethylene as raw material and produced with advanced production technology. It has good sealing performance, no penetration and leakage of slurry, high ring stiffness, small friction coefficient, aging resistance, resistance to electrical corrosion, good flexibility, and not easy to be tamped. The advantages of chiseling and new connection methods make construction connections more convenient and solve all the disadvantages of traditional metal corrugated pipes. When the pore-forming material is damaged, the slurry is the last protective barrier for the prestressed steel in the prestressed concrete structure. Plastic corrugated pipe is a new type of hole-forming material. Compared with metal corrugated pipe, it has the following advantages
The raw material of plastic corrugated pipe is. Its corrosion resistance is far better than that of metal. It is not afraid of acid and alkali corrosion. It does not corrode itself and can effectively protect the prestressed tendons from corrosion. Many prestressed structures are exposed to severe external influences, such as de-icing salts or brine. Prestressed tendons may be subject to corrosion when post-tensioned members leak through micro-cracks due to collapse of the waterproofing layer and blockage or failure of drainage facilities. The Construction Guidelines for Grouting of Prestressed Tendons state that metal pipes have no permanent corrosion resistance and are not sufficient to resist water leakage and reaching the grout as well as the prestressed tendons. Plastic corrugated pipes can provide a barrier protection function for prestressed tendons that is far superior to metal corrugated pipes, and can prevent harmful substances from penetrating the pipeline and contaminating it, thereby ensuring better durability of the post-tensioned prestressed structure
Under the same conditions, the friction coefficient of the reserved holes of the plastic bellows is significantly smaller than the friction coefficient of the reserved holes of the metal bellows, which reduces the friction loss of the prestressed force during the tensioning process. Generally speaking, the friction coefficient of plastic bellows is taken from the friction coefficient of metal bellows. The corrugated pipe has high strength, is not afraid of being stepped on, and is not easily broken by vibrators. Its sealing performance and anti-leakage performance are higher than that of metal bellows. , more suitable for vacuum grouting.