PVC pipe is extruded by hot pressing method after the cooperation of PVC resin, stabilizer and lubricant. It is the earliest plastic pipe developed and applied.
PVC-U pipe has strong corrosion resistance, easy adhesion, low price and hard texture. However, due to the leakage of PVC-U monomer and additives, it is only suitable for water supply system with transmission temperature not exceeding 45 ℃. Plastic pipes are used for drainage, wastewater, chemicals, heating and cooling fluids, food, ultra pure liquids, mud, gas, compressed air and vacuum system applications.
PVC pipe fittings include direct connection, tee and cross joint, and the tee is divided into 45 degrees and 90 degrees.
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Speaking of the pickup market, pickup truck manufacturers are extremely upset: In the Chinese automobile market, pickup trucks are still one of the “non-mainstream†edge models. This contrasts with the fashion and fashion in the international market.
The main reason for this is that the old problems have not been fundamentally resolved for many years. For example, because the pickup truck type is a prefix list, all large and medium-sized cities use it as a van to limit travel so that pickup trucks cannot enter large and medium-sized cities so far. The market has been constrained, and the market share of pickup trucks in the country has been limited to 200,000 vehicles. Secondly, the concept of Chinese people is very different from that of Western countries. It is a fashion to go through the streets of foreign countries and many people in the country still regard it as a fashion. In the tool car that gets rich by labor, opening a pickup truck cannot reflect its status. As a result, most of its customer base is in industrial and commercial enterprises or special industries, and the sales area locks in the secondary and tertiary markets of the urban-rural combination. It is not difficult to understand why the Great Wall and Jiangling, who have been cultivating more than ten years in the pickup industry, have turned to the field of passenger cars.
However, this non-mainstream model has created miracles that many models cannot create. In this field, the self-owned brands have become more and more brave, and foreign pickups still cannot enter China. In addition, more and more domestic pickup products and higher and higher technological content have become more and more important in the international market. In the domestic market, pickup trucks have always maintained a balanced development with steady increase.
In the past 2007, the pickup market remained prosperous and maintained a relatively stable growth rate: Accumulated sales last year were 186,000 units, an increase of 24% compared with 146,000 units in 2006. This growth rate even exceeds that of cars and MPVs, and is slightly higher than the overall increase in sales of the automotive market.
According to the China Association of Automobile Manufacturers Production and Sales News, in 2007, the sales volume of 10 major pickup brands nationwide totaled 186,000 units, of which Great Wall pickup topped the list with 54,200 units, accounting for 29.1% of the entire pickup market, since 1998. , Great Wall pickup market share and production and sales have achieved ten consecutive titles. Among the 2nd to the 6th, there are 27,900 Zhongxing Autos, 26,900 daily Zhengzhou, 23,700 Jiangling, 14,300 Yellow Sea and 12,900 Futian, which account for 15.0%, 14.5%, 12.8% and 7.7 of the market share, respectively. % and 6.9%.
From the data point of view, the pickup market is a "strong and permanent" pattern. In 2007, Great Wall, ZTE, Zhengzhou Nissan and Jiangling’s four old faces “big family†took up 71.4% of the market share. Among them, Great Wall Motors, which took the top 10 pickup trucks for the first time, is the sole share of the entire market. It is about the sum of the second and third place. According to the current trend, the status of the “boss†may be difficult to shake for a long time.
One by one, we can see that many pickup manufacturers in the Chinese market know that the banner of the production and sales of pickup trucks is still on the shoulders of the independent brands. In the two major camps that have been in the pickup market, the independent brands represented by Great Wall, JMC, Futian and ZTE have always occupied the mainstream of sales, while the joint venture brands represented by Nissan and Qingling only occupy market share. Two percent. According to the current development trend analysis, this situation will continue for a long time to come.
Looking at the market dynamics of the past year and the actions of various companies, “high-end†is a prominent feature of the pickup market and it should be also a popular trend in the future. For example, the Great Wall "Wind Jun," which was listed on the market last year, subverted the image of domestic pickup trucks by virtue of its appearance, performance, and power that are not inferior to those of European and American brands. Less than one year after being listed, it was exported to 76 countries and regions. It also provided strong support for Great Wall Motor’s consolidation of the leading position in the pickup market.
And "diversification" is another characteristic that is reflected in the market. In 2007, the competition in the pickup truck market became increasingly fierce. Gasoline, diesel, high, medium and low-end, and many new products launched or improved by various companies joined the pickup market. The new and old models are dazzling and the market performance is remarkable. It is understood that in 2008 the Great Wall and other pickup truck manufacturers will still have newer and better pickup trucks to market. It can be foreseen that diversification has become an inevitable trend and its pace of development should not slow down in the future.
In the past year, the international market for high-end pickup trucks was stronger than the domestic market, creating a situation in which “walls and flowers bloom outside the wallâ€.
"Market demand determines consumption." Pickups, which are not spoiled in the countryside or enter the city, are suitable vehicles for people and goods. In 2008, there will be a continuous and stable development, as long as the pickup manufacturers grasp the pulse of the times and the dynamics of market demand. , To create more fashion, technology, beautiful pickup, this edge model can also be expected to become a Volkswagen models, small markets can also become a big market.
1. It has good tensile and compressive strength, but its flexibility is not as good as other plastic pipes.
2. Small fluid resistance: the pipe wall of PVC-U pipe is very smooth and has little resistance to fluid. Its roughness coefficient is only 0.009. Its water transmission capacity can be 20% higher than that of cast iron pipe with the same pipe diameter and 40% higher than that of concrete pipe.
3. Excellent corrosion resistance and drug resistance: PVC-U pipe has excellent acid, alkali and corrosion resistance, is not affected by moisture and soil pH, and does not need any anti-corrosion treatment during pipe laying.
4. Good water tightness: the installation of PVC-U pipe has good water tightness whether it is connected by bonding or rubber ring.
5. Anti bite: PVC-U pipe is not a nutrient source, so it will not be eroded by rodents. According to the experiment conducted by the National Health Foundation in Michigan, mice will not bite PVC-U pipes.
6. Performance test: curing time shrinkage splitting strength tensile property peel strength thermal stability application period storage period release of harmful substances.