1. Economic and social benefits: PVC pipes are high-strength, low-cost, recyclable, environmentally friendly, and have little environmental impact on performance. At the same time, PVC is the only product that supports chlorine balance, is the pillar of the development of the chlor-alkali industry, and saves energy.
2. PVC pipes have complete technical specifications, product quality and construction quality are guaranteed, and have complete product standards, testing standards and engineering technical regulations.
3. PVC pipe has a long service life, up to 50 years:
① Theoretical basis: Although the strength of PVC pipes decreases with time, the decrease rate also becomes slower with time. It will almost no longer decrease after about 1000 hours. If PVC pipes are buried underground without exposing the pipes, Its lifespan should exceed 50 years.
② Laboratory test: After being tested by a weather-resistant testing machine, it contains 8 ultraviolet lamps and 50C steam, simulating the environmental conditions of nature. The product is placed in the experimental machine for 1 hour, which is equivalent to 1 year in the outside world. After 50 hours, the product is taken out for testing, and its performance changes little.
③ Practice has proved: PVC pipe was first used in Germany in 1936, and was developed and promoted in industrial countries such as the United States and Japan. The Formosa Plastics Group began production in 1958 and excavated the earliest products. After testing their various properties, they were found to be more than 95% of the original inherent properties. Buried pipes are not exposed to sunlight and are not affected by ultraviolet rays, and can be called semi-permanent materials.
4. PVC pipe has excellent corrosion resistance and chemical resistance.
5. Since most of the discharges in the sewage treatment field are corrosive liquids, there are higher requirements for the corrosion resistance of pipes. PVC pipe has excellent acid resistance, alkali resistance, and corrosion resistance, and is very suitable for chemical industry, wastewater drainage, sanitary sewers, etc.