Module 3 Process Piping Hydraulics Sizing And Pressure Rating Pdf Jun 2026

): Converts the resistance of a fitting into an equivalent length of straight pipe. Total length used in the Darcy equation becomes Resistance Coefficient Method (

Total pressure drop in a piping system is the sum of frictional losses from straight pipes and minor losses from fittings, valves, and equipment. Darcy-Weisbach Equation

To prevent erosion, noise, water hammer, and excessive pressure drops, designers use industry-standard velocity thresholds: Fluid Type Recommended Velocity Range (m/s) Recommended Velocity Range (ft/s) 1.5 – 3.0 Pump Suction Lines 0.6 – 1.2 Pump Discharge Lines 1.5 – 2.5 Steam (Saturated) 30.0 – 40.0 100 – 130 Steam (Superheated) 40.0 – 60.0 130 – 200 Gases / Vapors (General) 15.0 – 30.0 50 – 100 3. Hydraulics and Pressure Drop Calculations

This module explores the engineering principles of process piping, focusing on the critical relationship between , pipe sizing , and pressure integrity to ensure safe and efficient industrial operations. 1. Hydraulic Pipe Sizing Criteria ): Converts the resistance of a fitting into

): Crucial for determining hydrostatic pressure and mass flow rates. Viscosity (

Flanges are rated by "Class" (previously known as "Pound" or "lb").

Ltotal=Lstraight+∑Leqcap L sub t o t a l end-sub equals cap L sub s t r a i g h t end-sub plus sum of cap L sub e q end-sub 3. Process Piping Line Sizing Methodology Viscosity ( Flanges are rated by "Class" (previously

Calculate the total pressure drop across the entire pipe run, including fittings. Ensure it falls within the allowable budget set by the process constraints or available pump head. Sizing Criteria for Gas and Vapor Lines

Select standard pipe size (NPS) and schedule.

Match the calculated nominal thickness to standard pipe schedules (e.g., Schedule 40, 80, 160) specified in (Welded and Seamless Wrought Steel Pipe) or ASME B36.19M (Stainless Steel Pipe). 4. Flange Pressure-Temperature Ratings line list templates

To assist you with further calculation details, line list templates, or specific code requirements, let me know what details you need next. If you would like, tell me:

Rearranging this formula allows you to calculate the required inner diameter based on an acceptable target velocity: