UPVC pipe development prospects

In August 1998, the Xiamen Municipal Construction Committee issued a notice requiring all new construction projects to use plastic pipes for water supply pipes smaller than 400mm and indoor and outdoor drainage pipes, indicating that plastic pipes have entered a wider range of applications. However, the shortcomings of UPVC drainage pipes in use are still waiting for us to develop products with high strength, low noise, good fire resistance, low investment, and low energy consumption to adapt to the deeper and broader development of the modern construction market. need. Fortunately, many scientific research and production units outside China have continuously developed various new products, and some have already entered the market. They represent the development trend of UPVC pipes.

There are mature plastic-metal composite pipes in the Chinese market, which are resistant to high temperature and low noise. However, due to their high price and small pipe diameter, they are suitable for hot and cold water pipes in high-end decoration. There are also high-stiffness and high-temperature resistant pipes on the Chinese market. Plastic-steel composite pipe, but the price is also high, and it is still unconditional to be used in the drainage system; some units in China have developed double-layer plastic pipes, which can reduce noise indicators.

It is only one step away from entering the market; the Sichuan Fire Science Research Institute of the Ministry of Public Security has developed a flame-retardant PVC formula that uses halogen-free and antimony-free as flame-retardant smoke suppressants five years ago. The oxygen index reaches 51% to 56%. The smoke volume is low (the smoke density grade is about 54%) and the smoke toxicity is very small, but due to various reasons, the technology has not yet entered the market. Some advanced countries and regions abroad. For example, in Japan, a large number of reinforced double-layer pipes are used, but a shell made of asbestos or reinforced fiber cement is placed on the outside of ordinary UPVC pipes, which greatly improves the fire resistance characteristics. According to reports, the pipeline made by this technology can withstand high temperatures of 800°-1010°C, and will not produce smoke or soften or deform in a fire. It can be used at will in high-rise buildings. Plastic-metal composite pipes and plastic-steel composite pipes have long been widely used in developed countries and regions.

Generally speaking, China’s urban drainage projects are still dominated by cast iron pipes, cement pipes, and reinforced concrete pipes. Although the promotion and application of rigid PVC drainage pipes have made some achievements, they are still in the early stages of development. At this stage, there is still a big gap compared with advanced foreign countries. China's drainage pipeline service area is less than 70%, planned. To reach 80% by the beginning of the 21st century, this will require a large number of rigid PVC plastic drainage pipes. The broad market provides a better prospect for the development of plastic pipes.