Should I enter nominal pipe size?

No, enter the actual internal diameter. Pipe schedule, wall thickness and lining can change the bore even when the nominal size is unchanged.

Where should the velocity target come from?

Use the target from your qualified cleaning process for this circuit. The example value is illustrative; different soils, fluids, equipment and process conditions can require different targets.

Does enough velocity prove the pipe is clean?

No, velocity is only one cleaning variable. Concentration, temperature, contact time, residues and circuit design also affect cleaning, and tank coverage requires a different assessment.

Can I enter zero cleaning flow?

Yes, zero measured flow gives zero calculated velocity and a negative margin equal to your target. The qualified target must remain greater than zero.

Bottling, Canning & Filling Lines calculator

CIP Pipe Velocity Calculator

Find the average liquid velocity through a fully flooded circular pipe during cleaning. Enter measured flow, actual internal diameter and the qualified velocity target for your process.

What this calculator does

Calculate pipe velocity from cleaning flow and compare it with your qualified process target.

Formula used

Flow area = π × (internal diameter mm ÷ 1,000)² ÷ 4
Pipe velocity = (cleaning flow L/min ÷ 60,000) ÷ flow area
Target flow L/min = target velocity × flow area × 60,000
Velocity margin = pipe velocity − target velocity

Inputs explained

Cleaning Flow: Time-averaged liquid flow measured through this pipe section.
Internal Pipe Diameter: Actual internal diameter from the pipe specification or measurement.
Qualified Target Velocity: Your qualified process target; the example value is illustrative.

How to use the result

Best suited to recorded cleaning flow review, different pipe bore comparisons, qualified target flow conversion.
Does not establish cleaning validation, turbulence, tank coverage or pump capability. Temperature, chemistry, contact time and deposits are outside this velocity model. Listed input ranges are software limits, not equipment ratings or recommended operating conditions.

Common questions

Should I enter nominal pipe size? No, enter the actual internal diameter. Pipe schedule, wall thickness and lining can change the bore even when the nominal size is unchanged.
Where should the velocity target come from? Use the target from your qualified cleaning process for this circuit. The example value is illustrative; different soils, fluids, equipment and process conditions can require different targets.
Does enough velocity prove the pipe is clean? No, velocity is only one cleaning variable. Concentration, temperature, contact time, residues and circuit design also affect cleaning, and tank coverage requires a different assessment.
Can I enter zero cleaning flow? Yes, zero measured flow gives zero calculated velocity and a negative margin equal to your target. The qualified target must remain greater than zero.

Last reviewed 2026-10-12.