Chemistry

Difference Between UPVC and CPVC

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Main Difference

The main difference between UPVC and CPVC is that UPVC is a rigid form of PVC and is formed by un-plasticizing PVC, whereas CPVC is a flexible form of PVC which is formed by chlorination of PVC.

UPVC vs. CPVC

Un-plasticized Polyvinyl chloride(UPVC) is a un-plasticized form of Polyvinyl chloride (PVC), whereas, a Chlorinated polyvinyl chloride (CPVC) is a chlorinated form of Polyvinyl chloride. As the name indicates, UPVC is not composed of any plasticizers; however, CPVC is composed of plasticizers and chlorinated along with the addition of plasticizers. UPVC is not bendable contrary to it is comparative and does not show any flexibility contrary to CPVC, which is bendable and is flexible in this regard.

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UPVC is highly rigid due to lack of plasticizers in their formation; on the other hand, CPVC is flexible in this regard as plasticizers are added in their formation along with its chlorination. UPVC shows very good resistance to aggressive chemicals and corrosive fluids and can withstand resistance to different acids and salts but cannot withstand higher temperatures and cannot carry high-temperature liquids. CPVC is very durable in this regard as they show the same characteristics along with the addition of temperature withstanding ability. CPVC can withstand high temperatures and can carry boiling liquids for up to 200 degrees Fahrenheit. This character is gained by the CPVC as it undergoes the chlorination process.

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UPVC can be used for drainage water systems due to its property of very low maintenance but cannot be used for drinking water; on the other hand, CPVC also shares the same property of low maintenance, but they can additionally be used for drinking water passage. UPVC is very light and easy to transport and install anywhere. However, it also shares the same property along with the addition of flexibility. CPVC being flexible gives it more advantage against UPVC. UPVC is a rigid, tough, and transparent material, as it has high strength and stiffness, whereas, CPVC is more flexible less rigid in this regard.

Comparison Chart

UPVCCPVC
UPVC is a un-plasticized form of PVC, and it is is not bendable and does not show any flexibilityCPVC is a plasticized and chlorinated form of PVC and shows any flexibility contrary to UPVC.
Manufacturing
Un-plasticizing of PVCChlorination of polyvinyl chloride
Composition
Composed of un-plasticized PVCChlorinated and plasticized PVC
Mechanical Characteristic
Rigid, tough, and TransparentFlexible and bendable
Chemical Characteristic
Good chemical resistantChemical resistant with the additional characteristic of being temperature resistive
Installation
Easy to install, light in weight and low maintenance is requiredSame characteristics along with the additional characteristic of being flexible
Application
Building material, drainage supply, and chemical processingAdditionally can be used for drinkable water
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What is UPVC?

Un-plasticized Polyvinyl chloride is a un-plasticized form of Polyvinyl chloride (PVC), as the name indicates UPVC is not composed of any plasticizers, and due to this, they lack in the characteristic of being flexible. UPVC is not bendable contrary to its comparative as they lack the characteristic of being flexible. UPVC shows very good resistance to aggressive chemicals and corrosive fluids and can withstand resistance to different acids and salts but cannot withstand higher temperatures and cannot carry high-temperature liquids.

UPVC can be used for drainage water systems due to its property of very low maintenance but cannot be used for drinking water. UPVC is very light and easy to transport and install anywhere. These UPVC materials require low maintenance and can be used in various building materials and act as a substitute for painted wood.

Mostly these materials are used for edges and ridges of windows or when fit double coating in new buildings or in replacing single glass windows. The exact material has substituted the use of iron plumbing and drainage that were being used as drainpipes, waste pipes, and downpipes. These merchandises are often discussed under a category of home development industry called “roofline.”

UPVC being a cheap alternative to expensive timber and aluminum, is used as a cost-effective option. UPVC has amazing strength, low maintenance and is manufactured by using vinyl polymer and thermally efficient as they conduct very low heat because of the materials used in its making. One of the foremost gains of using a UPVC is that they not once require painting, and the only conservation required is to clean with a soggy cloth once in a couple of years.

Unlike metal pipes where welding is done to make joints, these UPVC pipes are easily fabricated with a simple adhesive, and hours of work of iron pipes can be finished in a few minutes. These pipes are prone to use in flammable services, and their use is avoided due to fire hazards. UPVC is also anti-corrosion as compared to traditional metals that are susceptible to corrosion, etc., UPVC is inert to acids, bases, salts, and as well as aliphatic hydrocarbons too as of their inherent characteristics. These properties enable them to extend their service life for years.

What is CPVC?

A chlorinated polyvinyl chloride is a chlorinated form of Polyvinyl chloride. CPVC is composed of plasticizers and is chlorinated along with the addition of plasticizers. PVC is produced with petroleum or natural gas and chlorine, which is extracted from kitchen salt. By weight, 50% of PVC is from salts.

The strong molecular properties of NaCl give rise to Na+ ions and Cl- Ions. These Chloride ions react with ethylene or acetylene to form a vinyl chloride monomer. The vinyl chloride monomer is pressurized and is put in the polymerization reactor, which contains water and catalysts that ease it in the polymerization reaction. CPVC consider as a thermoplastic invention that is formed by chlorination of this Poly Vinyl chloride.

CPVC is a tough and transparent material that has high strength and flexibility. The mechanical properties of CPVC are very similar when compared with UPVC. CPVC has high mechanical strength, and even at high temperatures, these properties remain intact. CPVC is well resistant to aggressive chemicals and corrosive fluids. They show high resistance to different acids and basis and are excellent resistant to external weather conditions.

These CPVC are non-resistant to chlorinated solvents, ester, or ketones. CPVC is a non-conductor and low combustive. They share all of these properties with UPVC with the addition of bearing higher temperatures than UPVC. These CPVC can ease the flow of high boiling liquids and show good resistance to around 95 Celsius.

CPVC is super easy to install and use, and their flexibility and ability to bend adds further characteristics to its properties and use. CPVC could be effortlessly shaped in various forms. CPVC is mostly used in the Building industry as UPVC and its low maintenance, and low cost make its use very feasible as compared to old aluminum and iron pipes, etc. One of the foremost gains of using a UPVC is that they not once require painting, and the only conservation required is to clean with a soggy cloth once in a couple of years.

CPVC is very light and easy to transport and install anywhere. This material requires low maintenance and can be used in various building materials and act as a substitute for painted wood as in UPVC. These materials are also used for window frames and glazed windows. It has replaced the use of iron plumbing, and in addition to these properties, they share with UPVC they are also good for using them as drinking water drains as if compared with UPVC, which cannot be used for drinking water canals. CPVC being a cheap alternative to expensive timber and aluminum, is used as a cost-effective option in many areas in addition to mentioned above.

Key Differences

  1. Un-plasticized Polyvinyl chloride is a un-plasticized form of Polyvinyl chloride (PVC), whereas a Chlorinated polyvinyl chloride is a chlorinated form of Polyvinyl chloride.
  2. UPVC is manufactured by un-plasticizing Poly Vinyl Chloride, whereas, CPVC, on the other hand, is plasticized form of Poly Vinyl Chloride and is chlorinated while in addition to its plasticization.
  3. UPVC is not bendable contrary to it is comparative and does not show any flexibility contrary to CPVC, which is bendable and is flexible in this regard.
  4. UPVC is highly rigid; on the other hand, CPVC is flexible in this regard as plasticizers are added in their formation along with its chlorination.
  5. UPVC can withstand resistance to different acids and salts but cannot carry high-temperature liquids, whereas, CPVC is very durable in this regard as they show the same characteristics along with the addition of temperature withstanding ability.
  6. UPVC can be used for drainage water systems and house improvement items due to its property of very low maintenance, but they cannot be used for drinking water, on the other hand, CPVC can additionally be used for drinking water passage.
  7. UPVC is very light and easy to transport and install anywhere but is rigid; however, it also shares the same property along with the addition of flexibility.

Conclusion

UPVC is a rigid structure of PVC and is formed by un-plasticizing PVC and is not suitable for using it in drinking water canals; on the other hand, CPVC is a flexible form of PVC, which is formed by chlorination of PVC and can be used for drinking water handling.

Harlon Moss

Harlon currently works as a quality moderator and content writer for Difference Wiki. He graduated from the University of California in 2010 with a degree in Computer Science. Follow him on Twitter @HarlonMoss