When we find that the lead content in drinking water exceeds the standard, we usually blame it on the lead pipe or lead containing brass and bronze fittings. But a new study shows that lead in galvanized steel pipe coating may be an important long-term source of lead in water.
Jinan galvanized pipe:
When the water pipe is not used for more than 6 hours, the first one is opened for large utilization for 10 minutes, and the water in the pipe or does not drink, because the pipe is not used for a long time, and the water dissolves too much. In addition, when drinking tap water, it is necessary to supplement some nutrients, such as calcium, zinc, vitamin E, C, B and protein, which can resist the toxicity of lead.
At present, most of the water pipe networks in China are lead-containing galvanized pipes, which have been used for more than 5 years. Therefore, in order to avoid lead poisoning, if possible, the replacement of pipe network or domestic water should be considered. In the water supply project, when using copper pipe to supply pure water, the pH value is about 6. The copper pipe, weld joint and faucet are in acid state, and lead will dissolve in a large amount from the pipe fittings. Therefore, special attention should be paid to drinking.
Families and individuals who regularly drink purified water should regularly supplement various nutrients, especially calcium and magnesium, which can prevent lead from absorbing these nutrients.
Aluminum plastic composite pipe:
More and more consumers have paid attention to the secondary pollution of the tap water of the galvanized pipe water supply system and the harm to human health. Many consumers in the new house decoration or renovation of the old house water supply pipe, almost all of the performance is better than the galvanized aluminum plastic composite pipe. But at present, there are many varieties of aluminum-plastic composite pipe in the market, and the quality and price are quite different. How to choose aluminum-plastic composite pipe has become a headache for consumers.
According to the introduction of relevant personnel, high-quality aluminum composite pipes, generally smooth exterior walls, trademarks, specifications, applicable temperature, meters and other clear identification on the walls, manufacturers also print the production quantity on the walls to monitor the product quality at any time; the product packaging is good, the labels on the packaging are also very clear, and the manufacturer's name, address, telephone number, etc. are printed in a conspicuous position. But the inferior products generally have rough walls, unclear or incomplete marks, simple packaging, and unknown factory address or telephone number.
2. Aluminum layer cannot be ignored
Good aluminum-plastic composite pipe, when the aluminum layer is overlapped and welded, the aluminum layer and the plastic layer are in close contact, and there is no layering phenomenon. In addition, some aluminum layers of counterfeit products are overlapped and not welded, and some aluminum layers and plastic layers are often layered and not close.
3. Price difference
目前,市场上销售的铝塑料复合管道,价格有很大的不同,一些1 - 2元每米,7 - 10元每米,根据铝塑料复合管道的生产成本分析,价格过低的产品,原材料的质量不能保证。因此，消费者在购买时，不能贪图便宜。实际上,一些大企业的生产能力不断提高,生产成本不断降低,一些著名品牌产品的价格也在下降,装饰铝塑复合管,住房需求的现在,名牌和普通产品总价值只有几十元不同,所以购买的产品有一定的声望是明智的选择。
At present, the prices of the aluminum plastic composite pipes sold on the market are quite different. Some are 1-2 yuan per meter, 7-10 yuan per meter. According to the production cost analysis of the aluminum plastic composite pipes, the quality of the raw materials for the products with low prices cannot be guaranteed. Therefore, consumers should not be greedy for cheap when they buy. In fact, the production capacity of some large enterprises is constantly improving, the production cost is constantly reducing, and the price of some famous brand products is also declining. Nowadays, the total value of famous brand and ordinary products is only tens of Yuan different with the demand for decorative aluminum-plastic composite pipes and housing. Therefore, it is a wise choice to purchase products with a certain reputation.
The official name of PPR pipe is random copolymer polypropylene pipe, which is the most widely used water supply pipe in China.
The interface of PPR pipe adopts hot-melt technology, and the pipe is fully integrated, so once the installation pressure test is passed, the water will not leak again, and the reliability is very high. But this is not to say that PPR water pipe is not a defective water pipe, which is slightly poor in high temperature resistance and pressure resistance, and the long-term operating temperature cannot exceed 70 ℃; the length of each section is limited, and bending construction is not allowed. If the distance to lay the pipe is long or there are many corners, a large number of joints will be used during construction; the pipe is very cheap, but the accessories are relatively expensive. In terms of comprehensive performance, PPR pipeline is currently the pipeline material with high cost performance, so it has become the preferred material for home installed pipeline transformation.
There are three main colors of PPR pipes sold on the market: white, green and gray. Why is there such a difference? The dealer's answer is the difference caused by the use of raw material PPR particles and different fillers. Among them, grey green is the PPR pipe with good quality, and grey is the early ordinary pipe with slightly poor quality.
In general, the original water pipe can be replaced in the water and electricity transformation. Home decoration companies and businesses recommend that decorators use hot water pipes when installing PPR, even in places where cold water has passed. This is because the technical parameters of hot water pipe are higher than that of cold water pipe, and the price difference is not big, so the water pipe is used for waterway reconstruction.
The above is about Jinan galvanized pipe, PPR pipe and aluminum plastic composite pipe. For more product information, please visit http://www.jnxxjm.com