Industrial Valves, Actuators & Flow Control worked example

Assembly Torque Audit Time at 11% calibration, documentation, and re-torque overhead: a worked example

Suppose calibration, documentation, and re-torque overhead falls to 11%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate total labor hours to complete a bolted joint torque audit on assembled valves, based on valves to audit, time per valve, and allowances for calibration checks and documentation.

The inputs for this scenario

  • Valves to torque-audit: 30 valves (held at the documented default)
  • Average audit time per valve: 12 min / valve (held at the documented default)
  • Calibration, documentation, and re-torque overhead: 11 % (the input this scenario stresses; the baseline uses 15)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base audit hours = valves to audit x audit time per valve (converted to hours).
  • Total torque audit time (hours) works out to 2.78 hr at these inputs, and this is the headline figure for the scenario.
  • Base audit time (checking only) works out to 2.5 hr at these inputs.
  • Calibration and documentation overhead added works out to 11 % at these inputs.
  • Valves audited per hour works out to 12 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where calibration, documentation, and re-torque overhead sits at 15% and the headline result is 2.88 hr, this scenario comes in 3.48% below the baseline at 2.78 hr.
  • It computes the total labor hours to torque-audit a batch of valves, including calibration, documentation and re-torque overhead. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Total torque audit time (hours): 2.78 hr (headline result)
  • Base audit time (checking only): 2.5 hr
  • Calibration and documentation overhead added: 11 %
  • Valves audited per hour: 12 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Assembly Torque Audit Time calculator, set calibration, documentation, and re-torque overhead to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.