Module 3 Process Piping Hydraulics Sizing And Pressure Rating Pdf -

Industrial plants rely on standard velocity and pressure drop limits to prevent issues like erosion, noise, water hammer, and high energy costs. Fluid Type Recommended Velocity Range (m/s) Target Pressure Drop (bar/100m) 0.5 – 1.2 0.05 – 0.15 Water (Pump Discharge) 1.5 – 2.5 0.4 – 1.0 Steam (Saturated) 0.1 – 0.5 Steam (Superheated) 0.2 – 0.8 Gas / Vapor (Low Pressure) 0.01 – 0.1 Gas / Vapor (High Pressure) 0.1 – 0.5 Sizing Criteria for Single-Phase Liquid Lines

f=0.25[log10(ϵ3.7D+5.74Re0.9)]2f equals the fraction with numerator 0.25 and denominator open bracket log base 10 of open paren the fraction with numerator epsilon and denominator 3.7 cap D end-fraction plus the fraction with numerator 5.74 and denominator cap R e to the 0.9 power end-fraction close paren close bracket squared end-fraction Fitting and Valve Losses (Minor Losses)

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Module 3 provides the procedural steps to transition from a process flow requirement (how much fluid) to a physical specification (pipe size and schedule) using fluid mechanics and ASME B31.3 code requirements. PDHengineer.com sample calculation

Calculating the friction loss is the core of hydraulic analysis. Understanding fluid behavior is the first step in sizing

Understanding fluid behavior is the first step in sizing. Key concepts include: Flow Characteristics

: The primary method for calculating head loss ( hLh sub cap L ) due to friction: Moody Diagram : Used to find the friction factor ( ) based on pipe roughness and the Reynolds number. ) is calculated to ensure the pipe can

based on economic balance and fluid type.

) is calculated to ensure the pipe can handle internal pressure (P):

): Flow exhibits characteristics of both laminar and turbulent regimes. Turbulent Flow (