Earthquake-resistant PE plastic pipe can withstand a magnitude 7 earthquake

For the seismic performance of PE pipes, people in the industry have a unified understanding: PE pipes have unique flexibility and excellent scratch resistance, easy to move, bend and intersect, and are not easy to break and cause damage when the pavement is settled or dislocated. Good performance. In the 1995 Kobe earthquake in Japan, the only pipes that did not cause large-scale damage were PE gas pipes and water supply pipes. It is precisely because of the many advantages including this advantage of PE pipe that it occupies an important position in the European pipeline market and has become the fastest growing pipeline product among various plastic pipeline products in the United States for more than ten years. Among the PE pipeline products, a composite pipe made of PE as the base material and reinforced with a steel mesh skeleton, steel mesh skeleton plastic (PE) reinforced composite pipe, has also attracted attention. On the basis of inheriting the various advantages of pure PE pipes, this pipe has a more prominent ability to adapt to conditions such as ground subsidence due to the reinforcement of the steel wire mesh skeleton. During the construction of the Olympic venues, this pipe was selected as the buried domestic water pipe for the National Stadium because of the above-mentioned advantages.

As for the seismic performance of PVC pipes with flexible joints, some consumers still have some misunderstandings, misunderstanding that the joints of the product are as brittle as the pipe product itself. However, relevant data shows that the shock resistance of plastic pipes with flexible joints is also obvious. Like the steel mesh skeleton plastic reinforced composite pipe in PE pipes, the shock resistance of PVC-M pipe, a modified product of PVC pipe products, is better than that of PVC-U.

According to experts, in addition to plastic pipes, some metal pipe products and concrete pipes have outstanding seismic performance. Among the metal pipe products, the centrifugal ductile iron pipe has outstanding extensibility and seismic performance. When the terrain changes, the ductile iron pipe after installation can deflect 35 degrees along the axis, and the damage rate in the earthquake is very low. According to the information provided by relevant industry associations, the seismic performance of PCCP is also ideal. According to reports, the PCCP pipe body is a rigid pipe, and the joint adopts a socket type, which is flexible. Therefore, the overall design is flexible, which makes it one of the pipes with good shock resistance. The data shows that after a magnitude 7.3 earthquake occurred in Taiwan on September 21, 1999, relevant departments investigated the damage to the public water supply pipeline equipment during the earthquake, and found that among all the pipelines, only PCCP had no damage. About 10 kilometers away from the epicenter of the earthquake, a PCCP pipeline with a diameter of 4 meters and a length of 3 kilometers performed well in the earthquake and was basically undamaged.