Module 3 Process Piping Hydraulics Sizing: And Pressure Rating Pdf [updated]

using the ASME B31.3 formula, adding corrosion margins and mill tolerances.

Seamless steel pipes usually have a manufacturing thickness tolerance of . The calculated must be divided by 0.8750.875 to find the nominal schedule thickness. Selecting Pipe Schedule using the ASME B31

Standard piping loops, offsets, or expansion joints must be added to long runs of pipe to absorb dimensional changes caused by thermal cycling. This prevents excessive stress on equipment nozzles. Selecting Pipe Schedule Standard piping loops, offsets, or

Focuses on overcoming frictional losses to ensure correct operating conditions and plant control. Pipe sizing is an economic decision

Pipe sizing is an economic decision. A smaller diameter pipe costs less to purchase and install but incurs higher pumping costs (high friction). A larger diameter pipe costs more upfront but reduces operating costs.

= Darcy friction factor (determined using the or the Colebrook-White equation ) = Equivalent length of the piping run ( = Acceleration due to gravity ( Minor Losses in Fittings and Valves