Abrasive Blasting, Shot Peening & Surface Prep calculator
Blast Air Pressure Loss Calculator
Pressure loss between compressor and nozzle reduces cleaning speed and can change the achieved anchor profile. This calculator turns a measured PSI drop into a loss percentage so crews can decide whether hose length, fittings, moisture separators, or compressor capacity need attention.
What this calculator does
- Calculate pressure drop as a percent of target nozzle pressure and compare it with the maximum acceptable loss.
- a blast technician is checking whether pressure drop is large enough to slow production or risk profile nonconformance
- Returns pressure drop as a percentage of target nozzle pressure.
Formula used
- Pressure loss = measured pressure drop รท target nozzle pressure
- Gap to target = maximum acceptable loss - pressure loss
Inputs explained
- Measured pressure drop: undefined
- Target nozzle pressure: undefined
- Maximum acceptable loss: undefined
How to use the result
- Use it when production slows, profile is low, hoses are extended, or extra nozzles are added.
- Use calibrated pressure checks at the nozzle; compressor gauge readings alone do not prove nozzle pressure.
Common questions
- Where should pressure be measured? Use a hypodermic needle gauge or approved method at the nozzle under blast, not just the compressor outlet.
- What causes high pressure loss? Undersized or long hose, restrictive fittings, worn nozzles, wet air, and insufficient compressor CFM are common causes.
- Why express loss as percent? Percent loss lets you compare different target pressures and decide whether the drop violates your standard.
- Does this calculate cleaning speed? No. It flags pressure loss. Actual cleaning speed also depends on media, stand-off, angle, and coating condition.
Last reviewed 2026-05-12.