Drinking Water Directive – New Challenges for PVC Pipes
Cristina Costa (Shin-Etsu/Cires, Portugal) presented Understanding the Impact of the New Drinking Water Directive. The Directive (DWD) introduces stricter requirements for materials in contact with drinking water, including:
- An incomplete first version of the EU Positive List (EUPL).
- Extremely stringent migration limits (0.1 µg/L).
- New obligations for non-intentionally added substances (NIAS).
- Expiry dates for many listed substances by 2028.
For PVC pipes, this means that manufacturers and suppliers must work closely together to ensure all formulation substances are listed, renew approvals, and prepare notifications where necessary. PVC4Pipes has already published detailed guidance for industry to navigate this process.
Advanced Microstructural Insights for PVC-O
Daniel Voces (Molecor, Spain) presented new research into the microstructure of oriented PVC (PVC-O) pipes, offering a deeper understanding of how orientation improves mechanical and long-term performance. By aligning the PVC molecules during production, PVC-O achieves exceptional strength-to-weight ratios, higher impact resistance, and superior pressure capacity compared with conventional PVC-U.
The study focused on optimisation strategies to further enhance these properties, showing how careful control of the orientation process can deliver pipes with even better performance and durability. These insights are particularly valuable as infrastructure projects demand materials that combine high reliability with lower environmental impact.
Using advanced analytical techniques, the research demonstrated how microstructural characterisation can guide further improvements in orientation, ensuring PVC-O continues to set benchmarks for performance and sustainability.
PVC-O pipes are already recognised as one of the most efficient solutions for transporting water, thanks to their light weight, energy savings in pumping, and reduced raw material use. The presentation confirmed that continued innovation in PVC-O technology ensures these pipes remain at the forefront of sustainable pipeline solutions.
Super-sized PVC-U Pipes
Chelsea Qin of Shanghai Jurry Plastics Machinery (China) presented the successful development of PVC-U pipes with an outside diameter of up to 1600 mm, setting a new benchmark for the industry. These super-sized pipes open fresh possibilities for large-scale infrastructure projects such as urban water supply, irrigation, and drainage systems.
The presentation underlined how PVC-U can compete with alternative materials in very large dimensions, while retaining its light weight, ease of installation, and proven durability.
With lower energy requirements in production and long service life, super-sized PVC-U pipes also bring efficiency and sustainability benefits, making them well-suited to meet the growing global demand for robust, eco-efficient infrastructure solutions.
