Module 3 Process Piping Hydraulics Sizing And Pressure Rating Pdf

: For normal liquid service, acceptable velocities typically range from

Frequently used for water systems (civil engineering contexts) but generally avoided for process hydrocarbons. $$V = 1.318 \cdot C \cdot R_h^0.63 \cdot S^0.54$$

= Pipe roughness coefficient (higher values indicate smoother interior walls) 2. Pipe Sizing Methodology : For normal liquid service, acceptable velocities typically

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)

ve=Cρv sub e equals the fraction with numerator cap C and denominator the square root of rho end-root end-fraction = Allowable stress value for the pipe material

Pipe sizing methods

A typical design workflow begins with a required mass or volumetric flow rate for a new process line. hf=f⋅LD⋅v22gh sub f equals f center dot the

= Allowable stress value for the pipe material at design temperature = Quality factor (weld joint efficiency)

Process piping is a critical component of any industrial plant, and its design requires careful consideration of hydraulics, sizing, and pressure rating. Proper design ensures safe and efficient operation, while also minimizing costs and reducing the risk of accidents. In this module, we will discuss the fundamental principles of process piping hydraulics, sizing, and pressure rating.

hf=f⋅LD⋅v22gh sub f equals f center dot the fraction with numerator cap L and denominator cap D end-fraction center dot the fraction with numerator v squared and denominator 2 g end-fraction = Head loss due to friction ( = Darcy friction factor (dimensionless) = Length of the pipe ( = Acceleration due to gravity ( To convert head loss ( ) to pressure drop ( ΔPcap delta cap P ), use the hydrostatic relationship: ΔP=ρghfcap delta cap P equals rho g h sub f Determining the Friction Factor (

$$ Re = \frac\rho v D\mu \quad \textor \quad \fracv D\nu $$