Xing Sheng
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河北興盛塑料管業(yè)有限公司
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Common problem
Common-problem
Comparison of chemical pipe and feed pipe in PVC-U pipe
Because PVC-U pipe has many advantages, its use is quite extensive. The common characteristics of PVC-U chemical pipe and water supply pipe are light quality, convenient handling, corrosion resistance, excellent drug resistance, long service life, smooth inner wall, small fluid resistance, large mechanical strength, good insulation, sanitary material, no pollution to water quality, good watertightness, convenient construction and low maintenance cost.
Although PVC is the main raw material for the production of pipe, but due to the use of different, its requirements are different. Now compare the difference between the two.
1, appearance: from the appearance is difficult to distinguish between the water supply pipe and chemical pipe, xingsheng pipe production of water supply pipe and chemical pipe can be distinguished from the color and logo. From the color, the color of the pipe belongs to light gray, the color of the chemical pipe belongs to dark gray. On the sign, the words "for drinking water" are printed on the wall of the pipe for water pipe and "for industrial use" are printed on the wall of the pipe for chemical pipe.
2. Service life: according to the national standard GB/T 18252-2008, with water as the medium, the service life of PVC-U pipe for water supply can reach 50 years at 20℃, and the service life can be reduced according to the change of pressure and temperature. As for the chemical pipe, due to the different conveying medium, and according to the pressure and temperature changes, resulting in different degrees of corrosion to the pipe. So the service life of chemical pipe needs to be decided according to the actual use.
3. Connection mode: The connection mode of the water pipe is mainly elastic sealing ring connection and adhesive bonding. Elastic sealing ring to choose to meet the requirements of rubber elastic sealing ring, such a connection not only good sealing, but also in line with the health requirements. Chemical pipe connection is mainly adhesive bonding and welding. The cement used in bonding cannot react with the chemical fluids transported. Chemical pipe connections require strict tightness, because if a chemical leak occurs, it will not only cause an accident, but also pollute the environment.
As PVC-U pipe is a kind of high molecular compound, its molecule contains polar chlorine, so it is very stable in chemistry and has excellent corrosion resistance and drug resistance. This is also the important reason why PVC-U pipe can be popularized and applied in industrial applications.
