In the last piece, we learned that both PVC pipe and PE pipe are food grade materials. But besides food grade, these plastic pipes also has other properties
PE pipe and PVC pipe has mechanical property
Both theory and practical experience show that the MRS coefficient of PVC is much higher than that of PE. That is, the strength in long-term use is higher than that of PE. Then for the same 75mm pipe, the wall thickness of the pipe made of PVC is much thinner than that of PE. This is because since the strength and long-term strength of PE materials at room temp are not as high as those of PVC.
While the strength can only increase with a thicker wall hose. If the wall thickness is the same, the PE pipe will not meet the strength required for use. If the pipe diameter is the same, then PVC pipe can transport water with a larger diameter than PE pipe. On the contrary, to achieve the same water transport volume, you need a larger PE pipe. But the cost will be higher. It shows that the higher strength and rigidity of PVC is suitable for use as water supply pipes. Because it is more economic.
PVC is a polar macromolecule. Thus it is more stable than PE and some small molecules. Then it is immune to the environment. However, now with the emergence of polymers such as cross-linked vinyl chloride, it will improve in this aspect.
At normal temp, the short-term and long-term strength of PVC is much higher than that of PE.
Development trend of PE pipes and PVC tubes
Since the early 1980s, the country has vigorously promoted the use of PVC pipes. Besides, we formulated a series of policies, guidelines, and specs. Then we accumulated a lot of experience. Today, it now has complete product specs and testing method specs, etc., Then unified the product specs and quality indicators. This illustrates that the development of PVC water supply pipelines has entered a mature period. Besides, the product quality and construction quality are both with the guarantee. Then it guarantees the use effect of PVC water supply pipes.