Differences Between PVC, PE, and PP Mechanical Properties
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Plastic pipes offer distinct advantages over traditional materials like lead, copper, ductile iron, concrete, and vitrified clay, including differences in weight, corrosion resistance, flexibility, and ease of connections. The main high-volume commodity polymers used are UPVC (referred to as PVC) and Polyolefins (PO), which include HDPE (PE) and PP.
Key Properties
Generally speaking, PVC is 2-3 times stronger and stiffer than PO. Conversely, the impact resistance of PVC is lower than that of PO. Another differing property is creep, which is higher for PO materials. These property differences influence both processing methods and pipe performance.
Applications
These polymers are used in both pressure applications, such as gas and water pipes, and non-pressure applications like drain, waste, and venting (DWV) systems and sewers.
FAQ Section
How significant is the stiffness difference between PVC and PO?
PVC is typically 2-3 times stiffer than PO materials like PE and PP.
Does the higher creep of PO affect performance?
Yes, higher creep in PO can play a role in buried pipes and the performance of seals in connections.
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Nick Belshof
