Module 3 Process Piping Hydraulics Sizing And Pressure Rating Pdf 'link' -

Module 3 — Process Piping Hydraulics: Sizing & Pressure Rating (Reference overview)

Summary

3.3 Sizing Procedure (Liquid Example)

1. Specify Q and allowable ΔP.
2. Assume a velocity (e.g., 2 m/s) → calculate ( D = \sqrt(4Q)/(\pi v) ).
3. Select nearest standard schedule pipe (e.g., NPS 4, Sch 40).
4. Recalculate v, Re, f, and ΔP.
5. If ΔP exceeds limit, increase D.

General Velocity Guidelines (Gases/Vapors): Module 3 — Process Piping Hydraulics: Sizing &

Erosion velocity limit (API RP 14E):

Pressure-integrity design determines the minimum wall thickness and the pressure ratings for in-line components like flanges and valves. Process Piping Fundamentals, Codes and Standards Specify Q and allowable ΔP

Addresses complex phenomena such as water hammer, where abrupt valve closure converts dynamic energy into pressure waves. Pipe Sizing Optimization: Sch 40). Recalculate v

3.2 Wall Thickness Calculation (ASME B31.3, Eq. 3a)

For straight pipe under internal pressure: