What's the difference between galvanized pipe and PPR pipe?, "When we found excessive lead levels in drinking water, lead pipes or leaded brass and bronze fittings were often cited as the culprit. However, a new study shows that galvanized steel pipes coated with The presence of lead in the layers may be an important long-term source of lead content in water."
When the water pipe is not used for more than 6 hours, first turn on the big tap for ten minutes, and drain the water in the water pipe or do not use it for drinking. This is because the pipe is not used for a long time, and too much lead will dissolve in the water. . In addition, when drinking tap water, it is necessary to supplement some nutrients, such as calcium, zinc, vitamin E, C, B and protein, etc., these substances can resist the toxicity of lead.
At present, most of the water pipe networks used in my country are lead-containing galvanized pipes, which have been used for more than 5 years. Therefore, in order to avoid lead poisoning, if possible, consider changing the pipe network or household water pipes. In the quality-separated pipeline water supply project, when using brass pipes to supply pure water, the PH value is generally around 6. Under acidic conditions, lead will be dissolved from the pipe fittings in a large amount of brass pipes, welds, and faucets. Therefore, special care should be taken when drinking. Notice.
Families and individuals who regularly drink purified water should supplement with various nutrients, especially calcium and magnesium, which can prevent lead from hindering the absorption of these nutrients.
The secondary pollution of galvanized pipes to tap water in the water supply system and the harm to human health have been paid more and more attention by consumers. Choose aluminum-plastic composite pipes whose performance is better than that of galvanized pipes. However, there are many varieties of aluminum-plastic composite pipes currently on the market, with great differences in quality and price. How to choose aluminum-plastic composite pipes has become a headache for consumers.
1. Appearance
According to the introduction of the relevant person, the outer wall of the high-quality aluminum composite pipe is generally smooth, and the trademark, specification, applicable temperature, number of meters and other signs on the pipe wall are clear. The manufacturer also prints the production number on the pipe wall to monitor the product quality at any time; The product is well packaged, the various signs on the package are also clear, and the manufacturer's name, address, telephone number, etc. are all printed in prominent positions. The fake and inferior products generally have rough walls, unclear or incomplete labels, simple packaging, and unknown factory addresses or telephone numbers.
2. The aluminum layer cannot be ignored
A good aluminum-plastic composite pipe has welding at the overlap of the aluminum layer, the aluminum layer and the plastic layer are closely combined, and there is no delamination phenomenon, while some fake and inferior products have no welding at the overlap of the aluminum layer, and some aluminum layers and plastic layers often Layered, not tight.
3. Price difference
At present, the prices of aluminum-plastic composite pipes on the market vary greatly. Some are 1-2 yuan per meter, and some are 7-10 yuan per meter. According to the analysis of the production cost of aluminum-plastic composite pipes, the products with too low prices are The quality of raw materials cannot be guaranteed at all. Therefore, consumers should not be greedy for cheap when purchasing. In fact, with the continuous improvement of the production capacity of some large enterprises, the continuous reduction of production costs, and the price reduction of some famous brand products, the total value of the aluminum-plastic composite pipe required for the decoration of a house is only a few dozen different from the total value of the common products. yuan, so it is a wise choice to buy products with a certain reputation.
The official name of PPR pipe is random copolymerization polypropylene pipe, which is the most widely used water supply pipe in home improvement projects.
The interface of the PPR pipe adopts hot-melt technology, and the pipes are completely fused together, so once the installation and pressure test is passed, there will be no water leakage, and the reliability is extremely high. But this does not mean that the PPR water pipe is a water pipe without defects. A large number of joints are used in construction; pipes are cheap but accessories are relatively expensive. In terms of comprehensive performance, PPR pipe is currently the most cost-effective pipe material, so it has become the first choice for home improvement water pipe transformation.
There are mainly three colors of PPR tubes on the market, white, green and gray. Why is there such a difference? The dealer's answer is that the raw material PPR particles used and the filler are different. Among them, white and green are high-quality PPR pipes with better materials, and gray are ordinary pipes with slightly poor materials in the early days.
Generally, in hydropower renovation, the original water pipes will be replaced. Home improvement companies and businesses recommend that decorators use hot water pipes when installing PPR pipes, even where cold water flows. This is because the technical parameters of hot water pipes are higher than those of cold water pipes, and the price is not much different, so hot water pipes are used for waterway reconstruction.