Select wire to see the copper core At present, there are many kinds of wires on the market, many specifications, and prices are chaotic. It is very difficult for consumers to choose. General home decoration, commonly used 2.5 square mm and 4 square mm two kinds of copper wire, but the price, the same size of a line, because manufacturers are different, the price can be a difference of 20% to 30%. As for the quality and length, whether the length is up to standard, consumers are even more difficult to determine. According to industry sources, the reason why the price difference of wires is huge is due to the different raw materials used in the production process. The main raw materials for producing wires are electrolytic copper, insulating materials and sheathing materials. At present, the raw material market has more than 70,000 yuan per ton of electrolytic copper, while the recycled copper is much cheaper; the gap between the quality of the insulating material and sheathing material and the defective product is even more disparate. In addition, the lack of length and inadequate insulation of the insulators also contribute to price differences. The length of each line, excellent products is 100 meters, while the defective product is only about 90 meters; the insulation content of excellent products accounted for 35% to 40%, while the defective products only 15%. By comparison, it is not difficult for consumers to see that there is a difference in the sales price of finished wire due to the presence of tidiness on the material. So, how to identify the advantages and disadvantages when buying a wire? One must look. See if there is a quality system certification; see whether the certificate is standardized; see if there is a factory name, site, inspection seal, and production date; see if the trademark is printed on the wire, specifications, voltage, etc. Also look at the cross section of the wire copper core, superior product copper color bright, soft color, otherwise it is defective. The second is to try. It is advisable that a wire head be repeatedly bent by hand, and that any product that has soft hand feeling, good fatigue resistance, plastic or rubber feel elasticity, and no crack on the wire insulation body is superior. Water pipe look material In order to make the living room beautiful, when people are decorating, the water pipes are generally constructed with a buried wall. Therefore, if the quality of the water pipes is not good, leakage and bursting will bring irreparable consequences. Aluminum-plastic composite pipe is one of the more popular pipes on the market. It is light, durable, and convenient to construct. Its flexibility is more suitable for home use. Its main disadvantage is that when used as a hot water pipe, due to the long-term thermal expansion and contraction, it may result in the misalignment of the snap-on connection, which may cause leakage. When purchasing the aluminum-plastic composite pipe, two things need to be noted: 1 Check the appearance of the product, and the aluminum-plastic composite pipe of good quality. Generally, the outer wall is smooth. The mark, specification, applicable temperature, and number of meters on the pipe wall are clearly identified. The manufacturer is in the pipe wall. The production number has also been printed, and the inferior products generally have rough outer walls, unclear or incomplete labels, simple packaging, and unknown site or telephone. 2 Look closely at the aluminum layer. A good aluminum-plastic composite pipe has a welded joint at the aluminum layer. The aluminum layer and the plastic layer are closely combined with no stratification, while the inferior products are not. PP-R pipe is a new type of pipe material, non-toxic, light weight, pressure resistance, corrosion resistance, using a special hot melt connection, will not corrosion rust, no scaling. When selecting, please note: 1 Product name: The product name of true PP-R should be “polypropylene pipe for hot and cold water†or “PP-R pipe for hot and cold waterâ€, where polypropylene is modified with ultra-fine particles Pipe (PP-R) or PP-R cold water pipe, PP-R hot water pipe, PP-E pipe and other informal names are pseudo PP-R pipe; 2 pseudo PP-R density than true PP-R slightly Large; 3 true PP-R tube is matte white or other color matte, pseudo PP-R tube bright and bright or colorful; 4 true PP-R tube is completely opaque, pseudo PP-R tube is slightly light or Translucent; 5 true PP-R tube feel soft, false PP-R tube feel smooth. 6 True PP-R pipe landing sound more dull, fake PP-R pipe landing sound more crisp. The service life of the pseudo-PP-R pipe is only 1-5 years, and the service life of the real PP-R pipe is more than 50 years. There are also copper tubes and stainless steel tubes. Although it is resistant to corrosion and elimination of bacteria, the price is too high. Few people in the general family are interested. Layout to science Nowadays, material management in the building materials market is not standardized. When purchasing electricity and water lines such as wires, switches, lamps, water supply pipes, etc., do not plan to purchase cheaper products. Buy regular factory products, and carefully check the product's production license, business license, and test report. , 3C certification and other information is complete, and to open an official invoice. In the hydropower construction process, the following points are mainly noted: 1. Do not break the original wire or plumbing pipe when drilling. When the electrical pipe is laid, it is necessary to thread the pipe. Do not bury the wire directly on the ground or in the wall. This is not only unsafe, but it cannot be repaired once it is damaged. Plumbing pipes must be pressure tested after they are laid, and they are qualified to do the next process to prevent damage caused by leaking pipes. 2. The parts of the kitchen and the bathroom that need to be waterproof shall be closed after the waterproofing is completed, and then the tiles shall be affixed after being qualified. 3. Wire connectors must be tinned. The kitchen and bathroom fittings are recommended to be waterproof. The connectors can be taped with high pressure self-adhesive tape and black tape. 4. Lamps with a weight exceeding 3 kg must be fixed on bolts or embedded hooks. Use of wooden wedges is prohibited. Metal shells of lamps with installation height less than 2.4 meters must be protected and grounded. Toilets must be waterproof sockets. Hydropower renovation switch home decoration outlet home improvement building materials market bathroom waterproof bathroom waterproof price bathroom leak
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