With the development of science and technology and the improvement of people's living standards, "health" and "safety" have become the two major themes that modern people pay most attention to. The quality of drinking water and the safety of water pipes have naturally become one of the focuses of people's attention. Lead in PVC pipes is hazardous to health. my country's PVC pipes have developed rapidly in recent years, with an annual growth rate of 8%, while the annual demand growth rate is 2%. Among plastic pipes, the amount of PVC pipes has been far ahead, and it is widely used in water supply and drainage pipes. However, in recent years, it has been discovered that the precipitation of lead salt as a heat stabilizer of PVC can directly cause heavy metal pollution in drinking water. When PVC pipes that use lead salt stabilizers are buried underground, the soil around the pipes will have heavy metals exceeding the standard; lead salts in the wires and cables used in the air will also be brought into the soil with the erosion of rainwater. It can be seen that the application of lead-containing PVC pipes will endanger people's health. At present, there are more than 200 plastic heat stabilizer manufacturers in my country, and 60% of the companies in the industry mainly produce lead salt heat stabilizers. On the market, more than 80% of PVC products use lead salt as a stabilizer, and the annual consumption is as high as 70,000 tons. Documents on the use of lead-containing PVC pipes are released. At present, plastic water supply pipes containing lead salts have been banned by countries all over the world. Therefore, the state and Beijing construction departments have issued regulations on the prohibition of lead-containing PVC pipes.
