What are the advantages of our customized UPVC tube? Why do we all choose to use UPVC tube?

Sep 23, 2021

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Nowadays, pipes are the building materials we must use. If a city wants to do a good job in drainage and pipeline transportation, it must use pipes. However, there are many kinds of pipes. UPVC pipe is one of them. What is UPVC pipe? What are the characteristics of UPVC pipe? Now Jiuzheng pipe network will give you a simple explanation.

What is a UPVC tube?

With polyvinyl chloride resin as the carrier, UPVC pipe has the excellent characteristics of accurate temperature sensing, timed melting and rapid absorption of effective components of additives when reducing the attraction between resin molecular chains. At the same time, it adopts the world-famous calcium zinc composite heat stabilizer, which can capture, inhibit, absorb and neutralize the removal of hydrogen chloride in the process of resin subjected to high temperature and melting, Double bond addition reaction with polyene structure to replace the active and unstable chlorine atoms in the molecule. So as to effectively and scientifically control the catalytic degradation and oxidative decomposition of the resin in the molten state.

During pipeline installation, the nominal pressure, grade and application occasion of cold and hot water pipes shall be rechecked. Firstly, before pipe cutting, the required length must be measured and calculated correctly, and the cutting line and hot-melt connection depth line must be drawn on the pipe surface with a boat pen. Then, the pipe must be cut so that the end face is perpendicular to the pipe axis. Pipe shear, pipe cutter or pipe cutter shall be used for pipe cutting, and steel saw shall not be used to cut pipe. If it is used, a scraper shall be used to remove the burrs and burrs of the pipe saw mouth. Thirdly, the connecting end face and welding surface of pipes and fittings must be clean, dry and free of oil. In addition, when welding elbow or tee and other pipe fittings, pay attention to the direction of the pipe. It is better to pre assemble first, correct the direction, and draw the axial positioning line with a pencil.

What are the characteristics of UPVC pipe?

UPVC pipe is a kind of plastic pipe with polyvinyl chloride (PVC) resin as raw material and no plasticizer. With the development of chemical industry technology, non-toxic pipes can be produced, so it has the properties of general PVC and adds some excellent properties. Specifically, it has the advantages of good corrosion resistance and flexibility, so it is especially suitable for water supply network. Because it is non-conductive, it is not easy to have electrochemical reaction with acid, alkali and salt. Acid, alkali and salt are difficult to corrode it, so there is no need for external anti-corrosion coating and lining. The flexibility is good, which overcomes the brittleness of plastic pipe in the past. It can yield without fracture under load. 

Such an experiment has been made: put a dn50mm UPVC pipe on the ground, and the crown 3.0 car has driven on it. The pipe is flat but not broken. Then we let the Dongfeng car loaded with goods press over the pipe. Similarly, the pipe is only deformed and not broken. In addition, UPVC pipe has small elastic modulus, so it can reduce the amplitude of pressure impact and reduce the impact force of water hammer. 

The inner wall of U-PVC pipe is smooth and the resistance is small (the resistance coefficient of UPVC pipe is 0.009, while that of general galvanized pipe and cast iron pipe is 0.012-0.013), so it is obvious that the hydraulic conditions are good. When the same pipe diameter is used to transport the same liquid, the resistance of UPVC pipe is about 30% lower than that of galvanized pipe and cast iron pipe; When the head loss is the same, the water conveyance capacity of UPVC pipe is more than 20% greater than that of cast iron pipe. Because the inner wall of UPVC pipe is smooth and the liquid flows inside without scaling, its conveying capacity will not decrease with the increase of operation time. This is the insurmountable disadvantage of galvanized pipe and cast iron pipe. People have a strong reaction to the phenomena of “yellow water” and “black water” of tap water, and the main reason for the deterioration of the water quality of the pipe network is the corrosion of the water supply pipeline, especially the cold galvanized pipe. 

The coating on the inner wall of the pipe is unstable, and the pipe begins to rust after a year and a half, resulting in the smell and color of iron in the water, and the corrosion of the galvanized pipe buried underground is more serious. The UPVC pipe is corrosion resistant. It does not scale, can inhibit the growth of bacteria, and is conducive to protecting the water quality from the secondary pollution of the pipeline. Therefore, UPVC pipe has a wide application prospect, especially for a large number of buried pipes in front of users’ water meters.

UPVC pipe

In addition, UPVC pipe also has light weight. The advantages of convenient transportation. The specific gravity of UPVC pipe is about 1.4 (the specific gravity of cast iron pipe is about 7.4), which is one fifth of the weight of cast iron pipe. Using UPVC pipe can save 1 / 10-1 / 5 of the transportation cost compared with cast iron pipe. Its handling, loading and unloading construction are very convenient. Often, the construction environment of water supply pipeline is difficult and the construction site is muddy. If it can reduce the labor intensity of workers and shorten the construction period, it is the most ideal thing. This ideal can be realized by using UPVC pipe. 

The UPVC pipe is light in weight and can be moved manually during installation. Generally, it does not need to use machinery. For example, the dead weight of a DN200 UPVC pipe with a length of 6m is about 55kg, while the dead weight of a cast iron pipe with the same diameter and length is 304kg. During installation, the UPVC pipe can be carried by one person, while the cast iron pipe needs three people or machinery to drop the pipe, which greatly reduces the labor intensity of workers and saves man hours and construction costs.