Module 3 Process Piping Hydraulics Sizing - And Pressure Rating Pdf Exclusive Patched

Forget the oversimplified Hazen-Williams for industrial process piping. Module 3 focuses on the :

Where 'c' is the sum of corrosion allowance, erosion allowance, and any mechanical allowances (e.g., for threading). A pipe sized correctly for hydraulics may still

= Darcy friction factor (obtained from the Moody Chart or Colebrook-White equation) = Equivalent length of the pipe ( For laminar flow, the friction factor is simply and any mechanical allowances (e.g.

Engineers utilize industry-standard velocity brackets as an initial starting point for pipe sizing. Fluid Type Recommended Velocity Range (m/s) Recommended Velocity Range (ft/s) 0.5 – 1.2 1.5 – 4.0 Water (Pump Discharge) 1.5 – 3.0 5.0 – 10.0 Steam (Saturated) 30.0 – 40.0 100.0 – 130.0 Steam (Superheated) 40.0 – 60.0 130.0 – 200.0 Gases (Low Pressure) 15.0 – 30.0 50.0 – 100.0 Step-by-Step Line Sizing Procedure A pipe sized correctly for hydraulics may still

Higher temperatures typically require a derating factor to be applied to the material's strength.

Calculate the frictional losses. Ensure the total drop does not exceed the maximum allowable limits or pump/compressor capacity.

A pipe sized correctly for hydraulics may still be unsafe if its wall thickness is inadequate. Module 3 shifts focus to the pipe's mechanical integrity, specifically its ability to withstand internal pressure without failing.