Industrial Valves, Actuators & Flow Control worked example

Assembly Torque Audit Time at 17% calibration, documentation, and re-torque overhead: a worked example

This scenario runs the assembly torque audit time calculation on the strong side: 17% calibration, documentation, and re-torque overhead, with every other input held at its documented default. Use this when planning a torque verification audit for bonnet bolting, flange bolting, or packing gland studs during production or a quality audit per ASME PCC-1 or site procedures.

The inputs for this scenario

  • Valves to torque-audit: 30 valves (unchanged)
  • Average audit time per valve: 12 min / valve (unchanged)
  • Calibration, documentation, and re-torque overhead: 17 % (raised for this scenario; the documented default is 15)

Working through the calculation

  • Applying the documented formula (Base audit hours = valves to audit x audit time per valve (converted to hours)) to the inputs above produces each figure below.
  • At this operating point the engine returns 2.93 hr for total torque audit time (hours), the number this scenario is built around.
  • At this operating point the engine returns 2.5 hr for base audit time (checking only).
  • At this operating point the engine returns 17 % for calibration and documentation overhead added.
  • At this operating point the engine returns 12 pieces / min for valves audited per hour.

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 1.74% above the baseline at 2.93 hr.
  • Use it when scheduling an inspection shift, staffing a torque audit cell, or pricing the QA step of an assembly job. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Total torque audit time (hours): 2.93 hr (headline result)
  • Base audit time (checking only): 2.5 hr
  • Calibration and documentation overhead added: 17 %
  • Valves audited per hour: 12 pieces / min

Run it with your numbers

  • Every input above is editable in the live Assembly Torque Audit Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.