Module 3 Process Piping Hydraulics Sizing | And Pressure Rating Pdf Better

You cannot size a pipe without knowing if the flow is Laminar (Re < 2000) or Turbulent (Re > 4000). Most process piping is turbulent, but viscous fluids (crude, lube oil) may slip into laminar.

[ P = \frac2 \cdot S \cdot tD ]