To calculate the friction factor for high pressure, turbulent steam flow, one must consider the Reynolds Number, pipe inner diameter (ID), and surface roughness. The Moody Diagram can be adapted for these conditions, providing a practical reference for friction factors. The Reynolds Number is influenced by the steam's density, velocity, ID, and viscosity, which should be determined for the specific flow conditions. Accurate calculations require understanding these fluid properties to ensure reliable results. Utilizing these principles will aid in effectively managing steam flow in high-pressure systems.