Although it began in China in recent years, production and application of new pipe, but has been an increasing number of construction projects there. Now, the domestic PPR pipe production line has already reached more than 30, the annual production capacity has reached 15,000 tons.
PPR is a PP-based material, made by the modified treatment. Compared to other polypropylene, it has better mechanical properties, higher tensile yield strength and impact resistance, is an excellent selection of hot water pipes. PP-R pipe non-toxic health, easy installation, excellent chemical resistance, in particular, it has good thermal welding performance, and its connection with the elements are completely dispose of the child together to solve a long-term water supply industry plagued pipeline junction leakage problem,
So to be widely applied.
PPR pipe in Europe in recent years the average annual increase in the use of more than 15%, there are already more than 80% of indoor water pipe used in PPR pipes. In China, under the "national chemical building material industry," Tenth Five-Year "plan and the 2010 Development Plan," By 2005, plastic pipe in various pipe market share to reach 50% or more, including hot and cold water supply and construction 60% of the heating pipe to plastic pipe. By 2010, this proportion increased to 80%. It is estimated that from 2001 to 2010, China's average annual demand for indoor cold water pipe is about 300 million meters, the demand for hot water pipes is about 100 million meters. Another plus hotels hot and cold pipes, industrial pipeline construction and so on, each year the demand for pipes is about 1.2 billion meters, China's construction sector has PPR pipe as a key to promote the three new varieties of plastic pipe in the devaluation. It can be predicted, PPR pipe will be rapid development in China and its market potential. However, PPR pipe prospered behind, problems can not be ignored.
Lack of raw materials hinder development of the industry
First, PPR pipe is also essential to rely on imports of raw materials. As the PPR itself is a low melt index, in the production process can easily adhere to equipment, walls, causing blockage caused by pipeline installation parking, but also in the granulation process was also prone to degradation, so PPR is currently rated as polypropylene products production of the most difficult kind of grade. Now there were only Yanshan Petrochemical, Yangzi Petrochemical and other petrochemical companies can produce a few large, well what is needed. Special Materials in this species of high-grade areas, basically at the blank of domestic raw materials, imported raw materials increased pipe production costs.
PPR pipe production process behind the problem still exist. Middle and low product manufacturers are more and in this area, the formation of a fierce price competition. The relatively high technical content requirements for special applications of the species, such as the relatively high hygiene requirements for drinking water pipeline directly, long-term use in high temperature conditions, require a higher temperature pipe production, the domestic enterprises looks bloated.
The lagged effect of the order of the standard industry
Second, lagging behind the national standard-setting. Polypropylene Pipe the development and application in China in recent years began to grow rapidly, especially in the application of hot water pipes only just beginning. PPR pipe shortly before the national standard by the China National Standardization Administration of China issued the standard number.
In GB there is no formal promulgation of the phenomenon of a number of manufacturers have cut corners, and some even use the cheaper non-pipeline to add certain additives to mixed Special Materials (commonly known as mixed ingredients), made of pipes posing as PPR pipes enter the market. Generally difficult for users to use a simple way to distinguish between genuine and PPR pipes, causing all kinds of fake and shoddy products to ultra-low price of disrupting the market, creating a vicious competition, not only seriously jeopardize the quality of the construction of large and small, but also a serious threat to the formal manufacturing enterprises survival. China PP / PE Pipe Business Association called for resolutely resist the fake and shoddy products, and other damage to the interests of nation-building and users of wrongful conduct. They also requested that before the implementation of the national standard formally promulgated, the regional authorities should be in accordance with relevant international standards to regulate the products, production, production enterprises should strictly self-disciplined, adhere to the principle of quality first, to purify the market, to seek the sustainable development of enterprises.
Application of the performance constraints play a PPR pipe behind the application of technology is relatively backward.
PPR pipe has its own characteristics, in the installation and construction need to have specialized technology. But at present, the national norms in this area is still under development, PPR pipe applied technology research is weak, construction technology, supporting relatively poor, do not form mature viable construction method. With the high quality result, but because of the construction workers for their lack of necessary knowledge, but also followed the previous construction method of metal pipes, PPR pipes can not play out the technical and economic performance.
However, PPR pipe, after all, is a general trend of development, progress in the process of the issue will eventually be resolved, but also need to take practical and effective measures. To establish a standardized national standards as soon as possible to strengthen the supervision of the industry, adjusting the industrial structure, enhance PPR pipe and its technical content of raw materials to the healthy development of the specification, for our PPR pipe of great significance to the industry.
