Declared velocity sizing arithmetic

Pipe diameter at target velocity

Inputs

Declared volumetric flowQUser-entered flow at the stated condition; fluid compressibility and leakage are excluded.

Declared target velocityvtargetUser-entered reference velocity only; this workspace does not select a target or pipe schedule.

Declared volumetric flowQ

0.001

Required internal flow area at target velocityA

0.0005

Calculated circular inside diameterD

25.231

D = √(4Q/(πvtarget)); A = Q/vtarget

A first-pass number, not a code check, certification, or approval. Read the method and its limits below. What this is and is not.

Calculation snapshot

Formula version 1.0.0

Declared volumetric flow	60
Declared target velocity	2

Declared volumetric flow	0.001 m³/s
Required internal flow area at target velocity	0.0005 m²
Calculated circular inside diameter	25.231 mm

D = √(4Q/(πvtarget)) · A = Q/vtarget

UTA Applied Fluid Mechanics pipe-loss reference: https://uta.pressbooks.pub/appliedfluidmechanics/chapter/experiment-4/

This printout is a record of displayed inputs and deterministic formula output. It is not an approval, certification, or engineering conclusion.

Method

Calculate the required circular internal flow area and diameter from a volumetric flow and target velocity.

D = √(4Q/(πvtarget)); A = Q/vtarget

When

Don’t

This is target-velocity circular-passage arithmetic only. It does not select a nominal pipe, tube, hose, schedule, material, wall thickness, pressure rating, fitting, pump, velocity target, pressure loss, structural support, corrosion allowance, fluid compatibility, safety, or approval.