Pipe fittings made of chlorinated polyvinyl chloride resin have outstanding advantages in its durability, corrosion resistance, acid and alkali resistance, aging resistance, low coefficient of thermal expansion, thermal conductivity and good resistance. Flammability and superior hygiene. CPVC pipeline meets the sanitary standards of all plastic hot and cold water pipes in China and has a very good market prospect. In foreign countries, CPVC has been widely used to manufacture domestic cold and hot water pipes and fittings. The pipeline has low heat loss, no water droplets, no water scale accumulation, and can be used continuously at a temperature of 82 ° C and a pressure of 0.7 MPa, and is certified by the National Environmental Sanitation Foundation for drinking water. In addition, since the ignition point of CPVC is much higher than that of wood, up to 450 °C, CPVC has been used abroad to manufacture fire sprinkler systems. Recently, CPVC pipes have also been used in fire protection systems in China.

The superior performance of chlorinated polyvinyl chloride pipes is manifested in 10 aspects:

1. Sturdy. Since CPVC is stronger than PP-R, PB and PEX, fewer hooks and brackets are required. CPVC can withstand a large pressure; at the same pressure, compared with PP-R, PB and PEX tubes, CPVC pipes can use a smaller pipe diameter to achieve a larger water flow.

2. Easy to install. Solvent-based adhesives can be used for connection without the need for special tools and power supplies, which is convenient for larger diameter pipes and non-powered applications.

3. preservative. CPVC is not easy to permeate oxygen, so the metal parts in the system will not be corroded by oxidation.

4. Flash point temperature. The ignition temperature of CPVC is 482 ° C, which is the lowest temperature that CPVC can be ignited by external flame when there is enough flammable gas outside. Other general flammable materials, such as wood, can ignite at 260 ° C or lower.

5. Good flame retardancy. CPVC has an oxygen index of 60, and its combustion ability is very low. It is extinguished from fire and does not produce fire droplets. When CPVC is burned, the smoke generation rate is very low and no toxic gas is produced.

6. Not affected by residual chlorine in the water. In China, like the United States, Japan and other countries, the chlorine disinfection method is used for drinking water disinfection. After long-term use, CPVC pipes will not be affected by residual chlorine in the water, and there will be no cracks or ruptures. According to reports from the United States, polyolefin pipes (mostly polyolefin pipes in China are introduced from Europe) will gradually crack and sag under the long-term erosion of residual chlorine in water.

7. Acid and alkali resistant. CPVC has strong anti-corrosion ability for acid or alkali and can be used to transport HCL and NaOH liquids.

8. Bacteria are not easy to reproduce. Tests have confirmed that the bacteria in the CPVC pipe are not easy to grow, and the bacterial growth rate is 1/60 of the PEX pipe, 1/10 of the copper pipe, and 1/4 of the steel pipe. The amount of Legionella in the water sample was 1/13 of the PEX tube and 1/17 of the PP-R tube.

9. Low coefficient of thermal expansion, thermal conductivity and aging resistance. Compared with other plastic pipes, the thermal expansion coefficient and thermal conductivity of CPVC pipes are relatively small, about 1/2 of other plastic pipes such as PP-R, PB and PEX. CPVC pipes have strong UV resistance and can be used outdoors, while general polyolefin pipes cannot.

10. Superior health performance indicators. The sanitary standards for all plastic hot and cold water pipes in China are the same. In addition to the sanitary standards for drinking water pipes, the CPVC hot and cold water pipes also have sanitary care that other plastic cold and hot water pipes do not have. Performance, recommended for use in tubing for medical systems.

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