Pump, Compressor & Rotating Equipment Assembly worked example

Pressure Test Time at 7.2% setup and dwell allowance: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop setup and dwell allowance to 7.2%, then walk the calculation through step by step. Pressure test time estimates how long a batch of pumps or compressors will occupy the hydrostatic or pneumatic test stand, given the stand's throughput and an allowance for setup and dwell.

The inputs for this scenario

  • Units to pressure test: 120 units (held at the documented default)
  • Test stand throughput rate: 12 units / hr (held at the documented default)
  • Setup and dwell allowance: 7.2 % (the input this scenario stresses; the baseline uses 10)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base pressure test time time = required work รท processing rate.
  • Adjusted run time works out to 10.72 psi at these inputs, and this is the headline figure for the scenario.
  • Base run time works out to 10 psi at these inputs.
  • Allowance applied works out to 7.2 % at these inputs.
  • Process rate works out to 12 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where setup and dwell allowance sits at 10% and the headline result is 11 psi, this scenario comes in 2.55% below the baseline at 10.72 psi.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to setup and dwell allowance, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes a steady throughput rate; a single unit that fails and needs re-test, or a stand changeover mid-batch, will push actual time past the estimate.

Results at a glance

  • Adjusted run time: 10.72 psi (headline result)
  • Base run time: 10 psi
  • Allowance applied: 7.2 %
  • Process rate: 12 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Pressure Test Time calculator, set setup and dwell allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.