Module 3 Process Piping Hydraulics Sizing And Pressure Rating Pdf
The lowest rated component in the line (pipe, flange, valve) sets the system pressure rating.
: Excessive pressure drop increases pumping costs and energy consumption. For non-compressible fluids, maintaining fully turbulent flow is essential to prevent stagnant areas.
Sizing isn't just about fitting a pipe in a rack; it's about optimizing flow. The lowest rated component in the line (pipe,
t=P⋅Do2(S⋅E⋅W+P⋅Y)t equals the fraction with numerator cap P center dot cap D sub o and denominator 2 open paren cap S center dot cap E center dot cap W plus cap P center dot cap Y close paren end-fraction = Pressure design thickness ( = Internal design gage pressure ( MPacap M cap P a Docap D sub o = Outside diameter of pipe (
From ASME B31.3, Eq. (3a): [ t = \fracP \cdot D2(SEW + PY) ] Where: Sizing isn't just about fitting a pipe in
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Key Reference Codes:
Comprehensive Guide to Process Piping Hydraulics: Sizing and Pressure Rating Introduction to Process Piping System Design
= Allowable stress value for the material at design temperature = Quality factor (weld joint efficiency) = Weld joint strength reduction factor Key Reference Codes: Comprehensive Guide to Process Piping
