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

Assumes mass is conserved within the system. For an incompressible fluid: A1v1=A2v2cap A sub 1 v sub 1 equals cap A sub 2 v sub 2

tm=PD2(SEW+PY)+ct sub m equals the fraction with numerator cap P cap D and denominator 2 open paren cap S cap E cap W plus cap P cap Y close paren end-fraction plus c = Internal design gage pressure. = Outside diameter of the pipe.

1f=-2log10(ϵ3.7⋅ID+2.51Ref)the fraction with numerator 1 and denominator the square root of f end-root end-fraction equals negative 2 log base 10 of open paren the fraction with numerator epsilon and denominator 3.7 center dot ID end-fraction plus the fraction with numerator 2.51 and denominator cap R e the square root of f end-root end-fraction close paren Assumes mass is conserved within the system

Improper sizing can cause operational failures that damage equipment or risk personnel safety. Cavitation in Liquid Lines

V=0.849⋅C⋅R0.63⋅S0.54cap V equals 0.849 center dot cap C center dot cap R to the 0.63 power center dot cap S to the 0.54 power = Hazen-Williams roughness coefficient (dimensionless) = Hydraulic radius ( = Slope of the energy line (head loss per unit length) 1f=-2log10(ϵ3

Minor losses happen when fluid changes direction or passes through equipment. Two primary methods quantify these losses: Equivalent Length Method ( Leqcap L sub e q end-sub

To minimize design errors, execute each step of the pipeline validation process in order: Section 304

The American Society of Mechanical Engineers (ASME) standard B31.3 governs Process Piping design. Section 304.1.2 provides the formula for determining the minimum required wall thickness for straight pipe under internal pressure. Wall Thickness Formula (ASME B31.3)

The pressure rating of process piping refers to the maximum allowable working pressure (MAWP) of the pipe and fittings. The pressure rating is determined by the pipe material, wall thickness, and design temperature.