When designing chilled water and condenser water system piping, several key considerations must be taken into account. These include pipe sizing, material selection, insulation, and system balancing. Pipe sizing must be carefully calculated to ensure adequate flow rates and pressure drops, while material selection must consider factors such as corrosion resistance and durability. Insulation is critical to reducing heat gain and loss, and system balancing is essential to ensuring proper flow rates and pressure distribution throughout the system. Additionally, designers must consider factors such as pump selection, valve placement, and control strategies to ensure optimal system performance.