Aluminum plastic composite pipe: aluminum plastic composite pipe loss is small, easy to transport coils, can be arbitrary cut, easy to install, easy construction. However, the accessories are pure copper, and the price is expensive. The inner diameter of the copper part is smaller than the inner diameter of the aluminum-plastic composite pipe, the flow rate of the caliber is small, and the installation is not good, and the water leaks due to thermal expansion and contraction. The pipelines are vulnerable to destruction by other professional construction processes, waste of parts during repairs, and high construction costs. Aluminum plastic pipe is made of high-density polyethylene sandwiched aluminum, the melting point of polyethylene is 140 °C, so its long-term high temperature performance is good, the supporting nut nut and steel sleeve pressure pipe fittings, as long as the correct installation, reliable High degree.
PP-R pipe: PP-R pipe is regarded as green and reliable pipe by building water supply and drainage. PP-R pipe fittings are also PP-R material, compared with aluminum plastic composite pipe, the cost is lower, and the pipe fittings are installed on the outside of the pipe, so that the flow is not reduced. However, the PP-R tube should not be suspended for a long distance, and a fixing bracket should be set every 50 cm or it is easy to hang down and bend. In addition to the pure PP-R pipe, there is a PP-R aluminum plastic pipe. The pipe fittings of this pipe are the same as the PP-R pipe, but it is equivalent to the performance of the aluminum plastic pipe, the cost is lower than that of the aluminum plastic composite pipe, and the resistance Aging and strength properties are good, long-distance hanging without sagging, bending.
It is understood that, PP-R pipe due to the molecular characteristics of polypropylene itself, whether imported or domestic, there are disadvantages such as poor high temperature performance and large linear expansion coefficient. Therefore, Document 54 of the Ministry of Construction [2001] expressly stated that the long-term working temperature of PP-R pipes should not exceed 70°C; and the hot-melt jointing technology is more complicated, and defects in the stacking material are easily generated during push-pull, resulting in stress concentration and affecting the pipelines. Long-term performance. Therefore, at the time of purchase, do not easily commission a hydraulic or some non-qualified decoration company. When purchasing, please pay attention to the actual origin, trademark, and after-sales service guarantee of the product.
PE pipe: PE pipe structure is single, the overall performance is inferior to aluminum-plastic pipe, mainly used for floor heating pipes, floor heating facilities are generally completed by the builders, home improvement generally do not use PE pipes.
PVC-U pipe: The connection method of PVC-U pipe is glue. When it is hot, it is easy to fall off and open the rubber. It is only suitable for underground pipelines or buried pipelines. If it is used for large-diameter high-pressure hydraulic pipes, special brackets must be designed, especially At the corner, the impact of the current on the turn is very damaging. It is not advisable to use PVC-U pipes in home-installed water pipes, but threading pipes are generally flame-retardant PVC plastic flat pipes (PVC threading pipes).
Brass: Copper pipes are superior in sanitary performance, but they are expensive. The connection method of the copper pipe is welding (the pipe is divided into tin without tin) and the pipe is snapped (the pipe is divided into two types, one is the clamp type, the other is the reverse bite, the apron seal). The pipeline is easily damaged by subsequent construction or secondary decoration. "I love my family" Tip: Family decoration people often overlook the choice of water supply pipes and pipe diameters. Only a few problems have been discovered after the stay. For example, leaking pipes may damage the decoration, the water pressure is not enough, and the water heater cannot start. Therefore, from the perspective of the life of the pipe, it is best to choose a copper pipe or a good-quality aluminum-plastic composite pipe, the pipe diameter should be 20 mm or more, and the branch pipe connecting one faucet should not be lower than 15 mm, otherwise the water pressure will be insufficient. And water noise problems. If you choose aluminum-plastic composite pipe fittings, you should pay attention to the actual diameter and increase 2-3 mm to select the pipe diameter, such as branch pipe diameter of 2025 specifications, and the supervisor should be 2532 specifications, in order to ensure that more than two faucets at the same time The amount of water when used.
Plumbing: To meet health needs, all health indicators for water pipes must meet national standards before they can be used. However, the degree of cleanliness of water does not depend entirely on the pollution of the water quality of the pipeline, but also whether the pipeline used can resist the penetration of oxygen in the outside air into the pipe wall. Long-term oxygen penetration can make bacteria, scale, and moss grow in the pipeline and pollute the water. Experts suggest that when buying plastic pipe for household use, it is best to ask the merchant for a product quality inspection report. Do not buy cheaper pipes without the name of the plant or site.
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