): Flow exhibits characteristics of both laminar and turbulent regimes. Turbulent Flow (
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: This is the most critical parameter for hydraulic calculations. It is derived from the Outside Diameter (OD) and the calculated wall thickness (t). ): Flow exhibits characteristics of both laminar and
= Quality factor (weld joint efficiency, ranging from 0.60 to 1.00)
By the end of this module, you will be able to: If you share with third parties, their policies apply
Assume a reasonable velocity (see ranges above).
) is the structural minimum. To find the total ordered nominal wall thickness ( ), designers must add safety allowances: : This is the most critical parameter for
Understanding Process Piping: Hydraulics, Sizing, and Pressure Rating
Typical velocities are 1-3 m/s (3-10 ft/s). Too low risks settling; too high causes erosion and noise. Gas Lines: Typically 15-30 m/s (50-100 ft/s). 3.2 Sizing Criteria
Once the diameter is decided, the pipe must withstand internal pressure, temperature, and external loads. 3.1 ASME B31.3 Piping Classes
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.