Three major problems plague the domestic PPR pipe industry

ppr is made of random copolymerized polypropylene as a base material and modified after treatment. Compared with other polypropylenes, it has better mechanical properties, higher tensile yield strength and impact resistance, making it an excellent choice for hot water delivery pipes. The ppr pipe is non-toxic, hygienic, easy to install, and has good chemical resistance. In particular, it has good thermal fusion properties. The molecules at the joints are completely fused with the molecules, which solves the problem of water leaks in the pipe joints that have long plagued the water supply industry. Widely used.
      In recent years, the average annual increase in the use of ppr pipes in Europe has been greater than 15%. At present, more than 80% of indoor water pipes have used ppr pipes. In China, according to the "Tenth Five-Year Plan" of the National Chemical Building Materials Industry and the 2010 Development Plan Outline, by 2005, plastic pipes will account for more than 50% of the various pipe markets. 60% of heating pipes are plastic pipes. By 2010, this proportion will be increased to 80%. According to estimates, from 2001 to 2010, the average annual demand for indoor cold water pipes in China was about 300 million meters, and the demand for hot water pipes was about 100 million meters. In addition, coupled with the renovation of hot and cold water pipes in hotels, industrial pipeline construction, etc., the annual pipeline demand is about 1.2 billion meters. China's construction department has taken ppr pipes as the first of three major new plastic pipes to be promoted. It is foreseeable that the ppr tube will develop at a high speed in China, and its market potential is huge. But behind the prosperity of the ppr tube, there are problems that cannot be ignored.


Insufficient raw materials hinder industry development
      First of all, the raw materials of ppr tubes are basically imported. Due to its low melting index, ppr easily adheres to the wall of the equipment during the production process, causing the pipeline to be blocked and causing the device to stop, and it is also prone to degradation during the granulation process. Therefore, ppr can be called the current polypropylene product. The most difficult grade to produce. At present, only Yanshan Petrochemical, Yangzi Petrochemical and other large petrochemical enterprises can produce, which is far from meeting the needs. In the field of high-end special materials of this variety, domestic raw materials are basically blank, and imported materials increase the production costs of pipe companies.
      The production of ppr pipe also has the problem of backward technology. There are many manufacturers of low-end products, and fierce price competition has been formed in this field. In terms of varieties with high technical requirements and special application areas, such as tap water pipelines for direct drinking that have high sanitary requirements, and high-temperature-resistant pipes that are used under high-temperature conditions for a long time, domestic companies appear Somewhat weak.


Lagging standards affect industry order
      Second is the lag in the formulation of national standards. The development and application of polypropylene pipes in China has only begun to grow rapidly in recent years, especially in the application of hot water pipes. The national standard managed by ppr was issued by the China National Standardization Administration Committee not long ago.
      Before the national standard was officially promulgated, some manufacturers had cut corners, and some even used cheap non-pipeline special materials to add certain additives for mixing (commonly known as mixed ingredients) to make pipes posing as ppr pipes and entering the market. It is difficult for ordinary users to distinguish true and fake ppr tubes with simple methods, causing all kinds of fake and shoddy products to disrupt the market with ultra-low prices and form vicious competition, which seriously harms the quality of large and small construction projects and threatens formal production enterprises. Survival. The China Polypropylene / Polyethylene Pipeline Enterprise Association calls for resolutely resisting counterfeit and shoddy products and other illegal acts that harm the interests of the country's construction and users. They also require that, before the national standard is officially promulgated and implemented, regional authorities should regulate production in accordance with international standards for related products, and production enterprises must be strict in self-discipline and adhere to the principle of quality first in order to purify the market and achieve sustainable development of enterprises.


Application of backward control performance to play the application of ppr tube
      The ppr pipe has its own characteristics, and special technology is required in the installation and construction. However, up to now, national regulations in this area are still being developed, the research on ppr pipe application technology is weak, construction technology is relatively poor, and mature and feasible construction methods have not been formed. As a result, there are high-quality products, but due to the lack of necessary knowledge of the construction workers, they still follow the construction methods of metal pipes in the past, and cannot play the technical and economic performance of ppr pipes.
      However, after all, the development of ppr tubes is the general trend, and the problems in the process of progress will eventually be resolved, but it is also necessary to take practical and effective measures. Establishing standardized national standards as soon as possible, strengthening supervision of this industry, adjusting the industrial structure, improving the technical content of ppr pipes and their raw materials, and enabling them to develop healthily in the specifications are of great significance to China's ppr pipe industry.