PPR water pipe have many problems in Zhengzhou

It is reported that Henan Province, the construction of Civil Society and the water company has held Interior Building Water Pipe Selection and Application of expert seminars, Zhengzhou City, the staff of water companies in 2008, since they are a total of 91 new district had 29678 hydraulic testing, initial inspection failure rate of 30.2%, over 50% of the reasons for failure are PPR pipe construction quality issues.

Failed mainly because PPR pipe

At the forum, indoor table water company in Zhengzhou, director of project management books Ling Jing, this year in March, city water supply company near the Yangtze River Road, a new residential water supply works, hydraulic testing found that the district a total of 1428, there were 1036 qualified households accounted for 72.5%, and 91 new district had 29678 hydraulic testing, initial inspection failure rate of 30.2%. Failure is mainly due to PPR pipe in the construction quality is hard to grasp, there has been a large area of reduced diameter, leakage phenomenon.

Jing Shu-Ling said, PPR pipe high technical requirements of construction, and susceptible to external factors, slightly improper operation is prone to PPR pipe hot melt necking the case in serious cases, can plug the pipeline diameter. And its appearance in conventional experiments and acceptance when the water pressure can not be found in use, the user water pressure will occur at home often enough, the local leakage phenomenon, a direct impact on the residents of the normal water.

In addition to shrinking paths, PPR pipe due to gas permeable translucent, but also easy to breed microbes and algae, causing water in the pipe secondary pollution. However, because of light weight, relatively low prices and other factors by the developer's favor, from 2000 was forbidden after use galvanized pipe, PPR pipe in the new residential district in the widely used.

Thin-walled stainless steel tube of good performance, but high cost

To solve this problem, municipal water company developed its own "Water detection" technology, can effectively detect emerging in the pipeline construction, such as necking, Kushido, pipeline leaks and other types of failure phenomena, beginning in 2009, has been fully applied to each of Zhengzhou New Area. The project received second prize of scientific and technological progress in Henan Province. However, after the hydraulic test can only play a supervisory role, and detected after the rectification is very difficult.

The authority of the national water supply and drainage experts, China Civil Engineering Society of Water Industry Association executive director Jiang Wen said in an interview the source, thin-walled stainless steel tubing beautiful and durable, life expectancy up to 50 years, and health performance is good, can effectively guarantee the water quality, is indoor water supply pipes in the current higher cost of products, currently in Shanghai, Guangzhou and other big cities has been widely used, should be recommended in the city.

He also said that, compared with commonly used PPR fitting, thin-walled stainless steel costs are relatively high, but because only indoor use, the average family should be able to withstand, if only a 500 odd dollars to buy enough pipe, plus the cost of construction and so on is about 2,000 yuan.