Cryogenic Storage & LNG Equipment worked example

Vacuum Jacket Leak Rate at 99% maximum acceptable jacket leak rate: a worked example

Push maximum acceptable jacket leak rate up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it when vacuum jacket leak rate in cryogenic storage and lng equipment needs a clean rate and gap-to-target you can put on a tier board.

The inputs for this scenario

  • Vacuum-jacketed components failing check: 8 components (unchanged)
  • Total vacuum-jacketed components inspected: 250 components (unchanged)
  • Maximum acceptable jacket leak rate: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (Vacuum jacket leak rate = components failing vacuum check ÷ total components inspected × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.2 % leaking for vacuum jacket leak rate, the number this scenario is built around.
  • At this operating point the engine returns 95.8 points for leak rate above limit.
  • At this operating point the engine returns 8 count for components failing vacuum check.
  • At this operating point the engine returns 250 count for components inspected.

How this compares with the baseline

  • Against the tool's baseline example, where maximum acceptable jacket leak rate sits at 95% and the headline result is 3.2 % leaking, this scenario lands almost exactly on the baseline at 3.2 % leaking.
  • It computes the share of inspected vacuum-jacketed components that failed their vacuum check, expressed as a percent, and the gap between that rate and your maximum acceptable rate. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Vacuum jacket leak rate: 3.2 % leaking (headline result)
  • Leak rate above limit: 95.8 points
  • Components failing vacuum check: 8 count
  • Components inspected: 250 count

Run it with your numbers

  • Every input above is editable in the live Vacuum Jacket Leak Rate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.