Talking about plastic manufacturing, PVC Pipes are made from extrusion process and Mouled PVC Fittings are made from blow molding process.
In the plastics extrusion process, raw thermoplastic material, or resin, is gravity fed from a top mounted hopper into the barrel of an extruder. Additives, such as colorants and UV inhibitors, in either liquid or pellet form are often used and can be introduced into the resin below arriving at the hopper. The process has much in common wi...th plastics injection molding though differs in that the process is usually continual. While injection molding can offer many similar profiles in continuous lengths, usually with added reinforcing, the finished product is pulled out of a die instead of extruding the fluid resin through a die.
The history of PVC Pipes:
PVC's materials are natural gas and rock salt.
- Natural gas is heated under pressure to form ethylene. This is called "cracking".
- Common rock salt (sodium chloride) is split by electrolysis to produce chlorine and lye (sodium hydroxide).
- Chlorine and ethylene are combined to form vinyl chloride monomer (VCM)....
- VCM molecules are then joined end-to-end (polymerized) to form long chains of Polyvinyl Chloride polymer (plastic).
- The thermoplastic PVC powder is compounded, melted and extruded into pipes.
In addition for its usages in construction industry, PVC pipes and its fittings derivatives also play an important role in running the water system in farming and agriculture.
When it comes to farming and agriculture, you often need to transport water for irrigation or hydroponic systems. Many options are available for piping material, but here are a few reasons to use PVC pipes and for agriculture. First, PVC pipe is durable. It can handle stress and sudden pressure much bet...ter than polyethylene or “poly” pipe, which is soft and flexible. Also, under the right conditions, it can last over 100 years without being replaced. Second, PVC pipe is inexpensive. It is a fraction of the price of any type of metal pipe. On a price-per-foot basis, PVC pipe is slightly more expensive than poly pipe, but makes up for it in durability and longevity.
What is a lifespan of my PVC pipes?
PVC as used in water piping network existed since 1930s-1950s. According to the article shared in this post, PVC pipes naturally lasted between 75 years to 100+ years and as a result, it is likely that the first ever created PVC pipe is still up and operating somewhere in this world!
PVC is replacing traditional building materials such as wood, metal, concrete and clay in many applications.
Versatility, cost effectiveness and an excellent record of use mean it is the most important polymer for the construction sector, which accounted for 60 percent of European PVC production in 2006.
About PVC Pipes:
PVC pipe is generally less expensive compared to other construction materials. Being made of plastic, pipes are also very durable and are extremely light for construction works or at-home DIY projects.