Views: 1 Author: doris zhang Publish Time: 2022-08-23 Origin: Site
PPR water pipes compared with traditional cast iron pipes, galvanized steel pipes, cement pipes and other pipes, has the advantages of energy saving and material saving, environmental protection, light weight and high strength, corrosion resistance, smooth inner wall without scale, easy construction and maintenance, long service life, etc. It is widely used in construction, municipal, industrial and agricultural fields such as building water supply and drainage, urban and rural water supply and drainage, city gas, electric power and fiber optic cable sheathing, industrial fluid transmission agricultural irrigation.
At present, in the home improvement market, water supply pipes are mainly PPR pipes. Because of its moderate price, and non-toxic and harmless, temperature and pressure resistance, fast and convenient construction, long service life, etc., the performance is very outstanding, so in the field of domestic water supply pipe occupies a mainstream position. So what are the minefields in the purchase of PPR water pipes? The following take you to understand.
1.The color of PPR water pipes
Many people will mistakenly believe that the color of PPR water pipes white is the best, which is a big misunderstanding. It should be noted that: the choice of color to take into account the light transmission of the pipe, light-transmitting pipe is often easy to breed algae microorganisms similar to moss, affecting water quality. Generally speaking white or other lighter colors will have poor shading performance, so it is not recommended. According to the new national standard, pipes that are exposed to the sun should be used opaque pipes, or the outside of the original pipe should be wrapped with a sunscreen layer to prevent the production of green algae. Yatong's five-star home furnishing pipe is blue, Yatong Zhijia pipe is green, with good opaqueness, not easy to breed bacteria and algae.
2.The difference between PPR hot and cold water pipes
Not all PPR water pipes are common for hot and cold water. There are specifically for cold water pipes, there are also used for hot water pipes, be sure to explain their requirements when buying. Of course, the raw materials used for PPR hot and cold water pipes are exactly the same, and the distinction between hot and cold water pipes is based on the different temperatures of the water that can be transported when using different specifications of the pipes. Because of the higher requirements of the pipe for conveying hot water, the wall thickness of the hot water pipe with the same nominal pressure (PN) is thicker than that of the cold water pipe. Some consumers use hot water pipes to transport both hot and cold water for convenience, which is also possible.
3.PPR pipe and fittings
Many times we may feel that it does not matter if the pipe and fittings are not from the same manufacturer. As long as the specifications can be right, this is actually wrong. The raw materials used by different manufacturers will be a little different, the production process is also different. The reliability of the connection is not guaranteed, so this is generally not recommended. We recommend that you try to choose the same brand of PPR pipe and fittings.
4.The choice of PPR water pipe pressure
The first thing to consider and determine the choice of PPR water pipe is the nominal pressure. Then choose the PPR water pipe specifications you need under the pressure conditions you need. PN in the pipe spray code represents the nominal pressure, the unit is MPa, the nominal pressure of different pipe wall thickness is different, in general, the pressure-bearing capacity of water pipes is much higher than the pressure of tap water, hot and cold water can choose PN2.0MPA pipes, some consumers will also choose PN2.5MPA pipes.
5.PPR water pipe pressure test
After the master plumber installed the piping system, the need for pressure testing, to facilitate the timely detection of construction irregularities lead to pipe leakage, so the connected PPR pipe confinement test is very necessary (i.e. pressure test). Pressure test can not be tried after the completion of the water line, should be tried again after 12 hours. This 12 hours is the maintenance period after the water line welding, if the pressure is too high, it is possible to damage the welding. Generally larger brands will provide pressure testing services, for example, Yatong pipeline will provide pressure testing services, the whole use of intelligent test press, test pressure time of half an hour, the experimental pressure is generally 10-12 kg pressure, if the pressure drop is greater than 0.02MPA, the system will determine that the test pressure does not pass, you need to check the piping system and each interface before re-testing.
In addition, in the purchase of PPR pipe, do not blindly think that the more expensive, the better the PPR water pipe, and do not want to save money, buy toxic, short-lived, poor quality water pipes that affect health, but should consider the quality of PPR water pipes from a variety of aspects such as product appearance, safety and durability, service life, etc., to give a comprehensive score of the cost performance of the water pipe, in order to buy a good product as desired.