Development trends of rubber hoses in China
In the previous article, we explored that both PVC hose and PE hose qualify as food-grade materials. However, beyond their food-grade nature, these plastic pipes possess several other notable properties.
Mechanical Properties of PE and PVC Pipes
Both theoretical analysis and practical experience demonstrate that the MRS coefficient of PVC is significantly higher than that of PE. In other words, PVC offers greater long-term strength. As a result, for a 75mm pipe, the PVC version has a much thinner wall compared to its PE counterpart. The reason is simple: at room temperature, the strength and long-term strength of PE materials fall short of those of PVC. Consequently, PE pipes need thicker walls to enhance their strength. If the wall thickness remains the same, PE pipes won’t meet the required strength standards. When the pipe diameters are equal, PVC pipes can carry a larger volume of water than PE pipes. Conversely, to achieve the same water transport capacity, you’ll need a larger-diameter PE pipe, which increases costs. Evidently, the high strength and rigidity of PVC make it an ideal choice for water supply pipes due to its economic advantages.
PVC, as a polar macromolecule, exhibits greater stability than PE and certain small molecules. Hence, it is more resistant to environmental factors. Moreover, with the advent of polymers like cross-linked vinyl chloride, PE’s performance in this regard is set to improve.
At normal temperatures, PVC surpasses PE in both short-term and long-term strength.
Development Trends of PE and PVC Pipes
Since the early 1980s, the country has actively promoted the use of PVC pipes. Alongside this push, a series of policies, guidelines, and specifications were formulated. Through these efforts, a wealth of experience was accumulated. Today, PVC pipes boast complete product specifications and testing method standards, which have unified product specifications and quality indicators. This clearly shows that the development of PVC water supply pipelines has reached a mature stage. Additionally, with guarantees for both product quality and construction quality, the effectiveness of PVC water supply pipes is ensured.
Related posts
