HP-CWS Copper-Water Heat Pipes Aavid, Thermal Division of Boyd Corporation, HP-CWS Copper-Water Heat Pipes provide high-precision temperature control and enable longer product lifetimes. These pipes are designed for high heat loads and transport the heat quickly, reliably, and effectively. The HP-CWS series withstands numerous freeze-thaw cycles and temperatures ranging from -55°C to +180°C. The copper enables design flexibility with bending and flattening options. The high heat capacity of the two-phase water cooling makes Aavid HP-CWS Copper-Water Heat Pipes ideal for use in a variety of thermal management solutions.