Piping material price and construction cost determines the basic engineering investment, Jinan water company had of domestic ordinary cast iron pipe, PVC pipe, PE pipe engineering cost is compared. The results of the comparison are listed in the following table 3. According to several domestic use of PE pipe water company to provide data, throughout the construction cost of the PE pipe as the main material with 10%. Compared with the PVC pipe, the construction cost is roughly equal to. Since the PE pipe flexible, can with terrain undulating curved laying of pipe ditch requirements low, poor flexibility of PVC pipe, laying requirements governing the straight groove, such as Ke Lu has a certain amount of bending, increase pipe fittings.
Diameter (mm) Common cast iron pipe PVC (including apron) PE pipe
100 1 0.45 0.40
150 1 0.66 0.58
200 1 0.73 0.65
300 1 0.94 0.98
400 1 0.93 0.96
500 1 1.036 1.115
600 1 1.237 1.329
PE pipe flexible especially in non excavation construction technology, such as the use of directional drilling dragged into laying, can not destroy ground and no damage to the existing pipeline on the condition of lower berth design new pipeline.
PE pipe can be inserted into the pipeline, repair the old pipe, in the city have been aging and pipe network transformation will be a large number of applications, not only the construction cost is very low and conducive to environmental protection.
Because PE has a special advantage, so at the beginning of the eighty's, the Western European countries began to increase sales of PE pipe. In France, the amount of steel pipe and PVC pipe has dropped year by year, while sales of PE customers have continued to rise,. With the medium pressure pipeline as an example, the total length of PE pipe and steel pipe laying, changed obviously. The laying of the total length of 1986 is 7 times PE pipe. In Switzerland, the growth rate of PE pipe is far greater than the growth rate of PVC pipe, West Germany and the UK Director of the situation is basically similar, PVC pipe sales were relatively stable, and the amount of PE pipe had greatly increased. In the 1990s, 1990-1998 years, the European PVC tube average annual growth of 2%, PE pipe with an average annual growth of 7%. In 1998 reached 260 million tons, the United States in 1997, 26 percent increase over 1996 to 37.4 million tons in 1998 than the 11.9% growth in 1997. PVC pipe is much higher than the growth rate of PE pipe, PE pipe in our country the development of nearly two years there has been mentioned at the beginning of the rapid development of the situation.
All of the above facts that PE pipe is the best choice for water supply pipe network, and selection of PE pipe and promote the development of PE pipe engineering system, will enable China's water supply pipe network to achieve development by leaps and bounds and on a new level, quickly reach the advanced level of the international network, is conducive to the economic construction, and to improve the quality of life and health level of the Chinese people.
没有评论:
发表评论