Why do drainage pipes prefer double wall corrugated pipes? The following editor will tell you this secret.
HDPE double wall corrugated pipe for drainage is a new type of pipe used for building outdoor drainage and municipal sewage drainage, which takes polyethylene resin as the main raw material, adds appropriate additives, and is extruded. It has the advantages of light weight, small drainage resistance, high compressive strength, corrosion resistance, convenient construction, etc. It is an ideal material to replace cast iron pipes and cement concrete pipes.
1、 Greatly shorten the construction period and reduce the construction difficulty
Since HDPE double wall corrugated pipe is much lighter than cement pipe, it is very easy to socket, so it greatly reduces the construction difficulty; In addition, the minimum length of HDPE double wall corrugated pipe is 6 meters, while that of cement pipe is 2.5 meters, which greatly shortens the construction period.
2、 HDPE double wall corrugated pipe has low requirements for trench bottom
Since the cement pipes are rigid pipes, in order to ensure the socket effect, the trench bottom must be treated flat, and it is better to lay a foundation layer, and the construction personnel are required to have an absolute sense of responsibility. HDPE double wall corrugated pipe is flexible pipe with low requirements for trench bottom.
3、 HDPE pipe does not break due to ground subsidence or crustal changes
The elongation of HDPE pipe is more than 20 times of that of steel pipe and six and a half times of that of PVC. However, its elongation at break is very high and its elongation is very strong. This means that when the ground sinks or the crust changes during an earthquake, HDPE pipes can resist deformation without breaking. This is much better than steel pipe, and also better than PVC pipe with obvious brittleness. This performance has been proved at home and abroad (it is proved that the Hanshin earthquake in Japan did not cause pipe fracture, and that the HDPE pipe was not damaged in the Zhinan Baoshan earthquake).
4、 The permeability of HDPE pipe is far lower than that of cement pipe, less than 2%, which will not cause secondary pollution to groundwater
The cement pipe is inelastic. Although it is equipped with rubber rings, the sealing effect is poor. Especially, the construction personnel, because of the heavy cement pipe, are not good at construction. They simply ignore the socket effect, resulting in the loss of rubber rings, which increases the pipe permeability.
5、 HDPE pipe has a long service life of more than 50 years
The safety guarantee period of PE pipe is more than 50 years, which has been proved not only by international standards and the New International, but also by advanced countries. Theoretically, the service life of cement is 20 years, but it is silicate, which has been corroded by acid and alkali for a long time, and its service life is greatly reduced. All over the country, there are examples of cement pipes that have to be replaced within a few years due to the ground subsidence and interface fracture caused by sewage leakage.
6、 The inner surface of HDPE pipe is smooth, without positive and negative electric cores and scaling
The cement pipe is easy to scale, which will reduce the pipe diameter and affect the flow.
7、 HDPE is light in weight, convenient for transportation and installation, without loss
The cement pipe is heavy, which is not convenient for transportation and installation, and is easy to wear during transportation and installation.
8、 When the flow, gradient and burial depth of the pipe are the same, HDPE can be one or two models smaller than cement pipe
The inner surface roughness coefficient of HDPE is 0.009, and the inner surface roughness coefficient of cement pipe is 0.014. According to the internationally recognized Chezy's Law, the same flow calculation shows that HDPE pipe can be two models smaller than cement pipe, but in practical application, it is recommended to be one model smaller. For example, 600 caliber cement pipes can be replaced with 500 caliber HDPE.
