Because CPVC has so superior high temperature, corrosion resistance and flame retardant performance that it has been widely used
Comparision between PVC and CPVC:
Index | PVC | CPVC |
Density(g/cm3) | 1.38—1.45 | 1.45—1.58 |
Vicat softening temperature(°C) | 72—82 | 100—125 |
Tensile strength(MPa) | 39—58 | 54—70 |
Bend strength(MPa) | 105 | 120 |
Linear coefficient of thermalexpansion(K-1) | (6—7)×10-5 | (7.5-8)×10-5 |
Extension at break | 120 | 50 |
Specification and technical indexes
| |||||||||||||||||||||||||||
Because CPVC has so superior high temperature, corrosion resistance and flame retardant performance that it has been widely used in making each different industry pipeline, hot and cold pipeline and fire pipeline. The advantages of CPVC pipe can be reflected in the following areas:
1, strong, thermostable Because CPVC compares PP-R, PE-X to be firm.Compared with PP, the PE-X tube,under the similar pressure, CPVC may use a smaller caliber to achieve the same water flow, thereby saving material costs and installation time. Compares with other thermoplastic, CPVC has the remarkable mechanical property under the different temperature, is suitable for the bearing the situation, the application temperature may reach as high as 93°C, the life may amount to 50 years.
2, easy installation The connection method are very similar with PVC. Most commonly used and simple connection method is resolver cementation.Other connection methods are threaded connection, flange connection and electrode connections.
3, non-corrosive oxygen permeability
CPVC have the anti-oxygen, therefore the oxygen seepage from the radiator will not bring metal corrosion.
4, reducing the infiltration of additives In order to prevent oxidation, some modified plastics needs to increase the massive antioxidant that may be infiltrated into the water supply system ,causing the ill-smelling smell. 5, without the impact of chlorine in water A lot of polyolefin materials (including PP, PE) may be decomposed with water, while CPVC is not affected by the impact of residual chlorine in water that there is no cracks and leakage. 6, good flame retardancy CPVC limiting oxygen index is 60, therefore it will not burn in the air. It has the characteristics : misfires the flame decoction,not to increase the fire set,restrict flame spread,low smoke generation.
7, CPVC has excellent chemical resistance to non-polar strong acid and alkali. Commonly used to substitute the metal to process the corrosive material, such as the poor quality of water, acidic material alkaline matter and other peroxide solutions.
8, the low thermal conductivity CPVC thermal conductivity is only 1.05. heat is not easy to disseminate from the pipeline, heat loss of pipeline is low. 9, bacteria breeding is not easy CPVC is not influenced by the impact of residual chlorine in water. So it will not result in cracks and leaks.Inner wall of pipe is smooth, not easy to breed bacteria. The research indicated that the breeding of germs in CPVC pipe is far lower than other materials such as copper, steel and other plastic pipe. 10, low thermal expansion CPVC thermal-expansion coefficient is lower than other plastics. The tube expansion is very small when tube-pass heat, unlike other types of channels (such as PP-RRP) due to the higher temperature caused by heat expansion coefficient that could cause snake bending,the existence safe hidden danger and eyesores.
11, the test of time none of a thermoplastic material such as CPVC,avoid the maintenance after 40 year hot water system's test, and displays its excellent performance.
Pipes & fittings CPVC resin
