Kind of pipe used in chilled water system?

In chilled water systems, the most commonly used pipes are typically made of copper, PVC, or PEX. Copper pipes are favored for their durability and resistance to corrosion, while PVC is lightweight and cost-effective, making it suitable for certain applications. PEX is flexible and easy to install, which can reduce installation time and costs. The choice of pipe material often depends on system design, budget, and local building codes.