Recognition issues for the particularity of the quality problems of plastic pipes China's plastic pipe producers and users are still generally poorly understood. For plastic pipes, the importance of quality is particularly prominent. This is because most plastic pipes are used in various construction projects, and a large part of them are buried underground or in building structures. Therefore, internationally, it is generally required to guarantee the service life of more than 50 years, and the guarantee of 50 years has already become the basic requirement recognized by national standards. In recent years, some developed countries have discussed how to further improve the quality of plastic pipelines: China ’s plastic pipeline industry needs to further improve its quality, sum up experience and lessons, and recognize the current understanding of the roots of quality problems, institutional roots, and technical Roots.
The importance of the quality of plastic pipes is particularly prominent. Another reason is that the cost of plastic pipes themselves in construction projects is often small, but the direct and indirect losses caused by damage are often very large, resulting in claims that far exceed the cost of the pipeline. . Therefore, the historical experience is that it would rather be conservative in standards and design, and the initial investment should be more expensive to ensure that it is safe to use.
It is precisely because of the special nature of plastic pipes that the international plastic pipe industry is very strict on quality issues, very cautious, and even conservative. Formed a complete set of quality assurance system, including systematic basic research, comprehensive test and inspection, strict standards and norms, authoritative certification system, and corporate structure with famous large enterprise groups as the main body. The international plastic pipe industry is so strict and cautious because it has learned 70 years of development experience and lessons. For example, there is a typical lesson from the accident of using polybutene PB pipeline system in the United States. It is recognized that the performance of polybutene pipes is leading in various building cold and hot water piping systems. Polybutene pipes have been used in the United States for a long time. Although the price is relatively expensive, the amount of polybutene pipes in the United States has reached 14 million in 1990. Meter. However, since 1990, the amount of polybutene pipes in the United States has decreased year by year, and in 1999 it has dropped to only 500,000 meters, and it has actually withdrawn from the US market. The reason is that a large-scale quality accident occurred in the United States in the 1990s, and finally the cost of compensating users of the production enterprises through court mediation was hundreds of millions of dollars. The cause of the accident was not the polybutene tube, but only a performance of the supporting POM pipe fittings used was not controlled.
In the past ten years, we have also had a lot of experience and lessons, the most typical of which is the experience of the ups and downs of aluminum-plastic composite pipes in China. Aluminum-plastic composite pipe is a new technology product used in the field of cold and hot water piping systems in buildings. According to statistics, the application of aluminum-plastic composite pipes in foreign countries has been steadily increasing year by year. In 1998, China set off a climax of investment, and quickly formed a huge production capacity, becoming the country with the largest production and application of aluminum-plastic composite pipes in the world, but by 2000 it entered a low tide, a large number of production lines were abandoned, and many enterprises suffered heavy losses in recent years. Grow again. The reason for the ups and downs is the general neglect of quality in the early days. Aluminum-plastic composite pipes started with the introduction of technology, but at that time most companies only imitated their structures and did not abide by their standards. Most products are manufactured without national standards and in accordance with relevant foreign standards. The inevitable result is a large number of accidents after use. So many companies dare to invest and dare to produce in the absence of standards and testing, which fully reflects the importance of domestically not understanding the quality of plastic pipes.
Comparing the Chinese and foreign plastic pipe production companies can find a difference worth thinking about. Foreign plastic pipe products have changed little over the years, mainly producing some varieties with a complete standard system, and developing products with new structures and new materials is very cautious. However, the domestic plastic pipe production business community often sees new products being launched, and many new products often fail to undergo rigorous testing and testing, and dare to be put into production and promotion without the test of actual application. For example, two years ago, an enterprise claimed to 'invented' a new type of winding structure wall pipe for buried drainage. In fact, the enterprise did not understand the basic performance requirements of buried drainage pipes. Sadly not only through 'invention identification' but also 'transfer of technology' to several regions. The ups and downs of this type of 'new product' both cause economic losses and jeopardize the credibility of plastic pipes. Analysing its root cause is still not understanding the importance of the quality of plastic pipes, and regards the plastic pipe industry as a plastic daily necessities industry that needs to be renovated every year.
Therefore, to promote China's plastic pipeline industry to further improve the quality and avoid the loss of repeated blind development ups and downs, we must first solve the problem of understanding.
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