An NPS 4 pipe has the same outside diameter regardless of schedule. However, the inside diameter (ID) shrinks as schedule increases. This changes your velocity and pressure drop drastically. Our exclusive PDF includes a full ID chart for all schedules from 5S to XXS.
Standard for non-corrosive fluids up to 425°C. An NPS 4 pipe has the same outside
to transport fluid at a target flow rate while keeping pressure drops within acceptable limits. CEDengineering.com Key Formula : The relationship between flow rate ( ), velocity ( ), and area ( ) is fundamental: cap Q equals cap A cross v : Rearrange to solve for the required cross-sectional area: velocity ( )
Unstable flow (Reynolds number 2000–4000). An NPS 4 pipe has the same outside