PP pipe has the characteristics of high temperature resistance, convenient pipe connection (heat fusion, electric welding, pipe connection), recyclable use, etc. It is mainly used in farmland water delivery systems, building water supply systems, heating systems, and chemical pipeline systems. According to different PP polymerization conditions can be divided into homopolymer polypropylene (PP-H), block copolymer polypropylene (PP-B) and random copolymer polypropylene (PP-R). Due to the brittleness of PP-H tubing at low temperatures, its use was gradually replaced by PP-B tubing and PP-R tubing in some applications. Among them, PP-B pipe is mainly used for cold water system and ground heating system, while PP-R pipe is more widely used. PP-B and PP-R pipes not only have the characteristics of general plastic pipe, but also have the following characteristics: good hygienic performance, heat resistance, heat preservation, energy saving, easy installation, reliable connection, recyclable raw materials, simple equipment requirements, simple production process Easy to control, free laying of pipes. Since China banned the use of galvanized pipes as water supply pipes in new houses in 2000, polypropylene pipes and polyethylene pipes have made considerable progress. Among them, PP-R pipe is the third generation of modified PP pipes developed in Europe in the early 1990s. The long-term hot-water hydrostatic life of PP-R pipe is much higher than that of PP-H and PP-B, and the pressure resistance, low-temperature resistance and service life are all improved. With the rapid development of China's economy, the usage of PP-R pipe has also increased substantially, and the market share has rapidly increased. China's Ministry of Construction has adopted the PP-R pipe as the decisive category for the three major new-type plastic pipe materials to be promoted. Therefore, the development momentum has been rapid in recent years. In 1997, there were only a few PP-R pipe manufacturers in China, no more than ten in 1998, and 30 in 1999. By the end of 2000, PP-R pipe manufacturers had been estimated to have reached about 70 production lines, and the production line exceeded 130. Above 50,000 tons, the actual production volume is less than 20,000 tons. As the PP pipe production enterprises blindly launched, the capacity of the pipes was seriously excessive, resulting in vicious competition and declining quality, resulting in many problems and causing a very bad social impact. In the past two years, through the national rectification and the introduction of corresponding pipe quality and construction standards, the industry is embarking on the path of healthy development. At present, the domestic production capacity is about 300,000 tons, and the output is about 140,000 tons. Representative pipe manufacturers include Shanghai Building Materials Factory, Linhai Weixing New Building Materials Co., Ltd., Hangzhou Yongheng New Building Materials Co., Ltd., Hebei Yuguang Industry & Trade Co., Ltd., Wuhan Jinniu Economic Development Co., Ltd., and Angang Industry First Sheet. Factory and so on. Before 1999, the raw materials used by domestic PP-R pipe manufacturing enterprises were all imported materials, mainly from Europe and South Korea. Developed countries in Europe and America have developed random copolymer pipe materials as early as 1980s, such as Borealis RA130E, Hearst PPR pipe materials, Targo's PPH5416, South Korea Hyosung's PP-RR200P, PP-M910 and so on. Domestic petrochemical enterprises have developed PPB and PPR pipe special materials since 1999, such as PPR4220, PPB4240, 8101 in Yanshan, QPR01 in Qilu, C180 in Yangtze, PPB240, P340 in Panjin and so on. In 2000, the output of domestic PPR pipe special materials was about 3,000 tons, and the import volume was about 10,000 tons. In 2003, the domestic output reached 35,000 tons and the import volume was about 95,000 tons. At present, the price of Nordic PPR pipe materials is 13,500 yuan per ton, while that of domestically produced materials is mostly below 9,000 yuan per ton. The price of Korean Hyosung products is 9,500 yuan per ton. This shows that there is a big gap between domestic material quality and product performance and Borealis products, which need to be improved and improved. In recent years, the development of PP plastic pipe is in good condition. It has greatly replaced the cross-linked polyethylene pipe and the cross-linked polyethylene-aluminum composite pipe. In China, between 2001 and 2010, the annual domestic demand for cold water pipes was about 300 million meters, the demand for hot water pipes was about 100 million meters, the demand for heating pipes was about 200 million meters, and other types of cold and hot water pipes for buildings The demand is about 100 million meters. The demand for floor radiant heating pipes is about 400 million meters. The annual demand for cold water and hot water pipes for solar water heaters is about 20 million meters. In addition, the average number of hot and cold water pipes in each hotel in China is up to 20 million meters. The annual demand for pipelines for building renovation projects is about 20 million meters. The annual demand for industrial pipelines is about 20 million meters. The pipeline for medical and food production is annual. The demand is about 20 million meters. Based on the above calculations, the annual demand for engineering construction pipelines in China between 2001 and 2010 is about 1.2 billion meters. If the PP pipeline is calculated at a market share of 30%, its annual market demand will reach 300 million to 400 million meters. Therefore, it can be expected that the PP pipe will be developed rapidly in the next 10 to 20 years, and its market potential is huge. Towel Fabric,Stretch Knit,Single Jersey Fabric,Cotton Knit Fabric SHAOXING CITY TIANHONG TRADE CO., LTD , https://www.sxtianhongfabric.com