Industrial Gases & Cryogenic Systems worked example

Safety Inspection Workload at 29% access, lockout, and documentation allowance: a worked example

What does the result look like when access, lockout, and documentation allowance reaches 29%? The full calculation is worked below with real intermediate numbers. Use it when planning inspections for bulk tanks, vaporizers, dewars, manifolds, pressure relief devices, transfer hoses, pipelines, or cylinder storage areas.

The inputs for this scenario

  • Gas system inspection points: 90 inspection points (unchanged)
  • Inspection points completed per hour: 12 inspection points / hr (unchanged)
  • Access, lockout, and documentation allowance: 29 % (raised for this scenario; the documented default is 25)

Working through the calculation

  • Applying the documented formula (Base safety inspection workload = gas system inspection points รท inspection points completed per hour) to the inputs above produces each figure below.
  • At this operating point the engine returns 9.68 hr for required safety inspection workload, the number this scenario is built around.
  • At this operating point the engine returns 7.5 hr for base safety inspection workload.
  • At this operating point the engine returns 29 % for access, lockout, and documentation allowance.
  • At this operating point the engine returns 12 pieces / min for inspection points completed per hour.

How this compares with the baseline

  • Against the tool's baseline example, where access, lockout, and documentation allowance sits at 25% and the headline result is 9.38 hr, this scenario comes in 3.2% above the baseline at 9.68 hr.
  • A figure at this level is achievable when access, lockout, and documentation allowance is genuinely sustained, not just peaked for a shift. It applies one blanket allowance across all points; in reality a relief valve buried in an enclosure carries far more access overhead than a wall-mounted regulator, so a single percentage smooths over real variation.

Results at a glance

  • Required safety inspection workload: 9.68 hr (headline result)
  • Base safety inspection workload: 7.5 hr
  • Access, lockout, and documentation allowance: 29 %
  • Inspection points completed per hour: 12 pieces / min

Run it with your numbers

  • Every input above is editable in the live Safety Inspection Workload calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.