Cryogenic Storage & LNG Equipment worked example

Pressure Relief Sizing Cost at 58% share requiring replacement or redesign: a worked example

Suppose share requiring replacement or redesign falls to 58%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate the cost scope for cryogenic pressure relief devices, vent piping, and relief-sizing engineering assumptions.

The inputs for this scenario

  • Relief devices or vent paths reviewed: 100 devices (held at the documented default)
  • Relief hardware or sizing cost per device: 45 $ / device (held at the documented default)
  • Share requiring replacement or redesign: 58 % (the input this scenario stresses; the baseline uses 80)
  • Fixed relief engineering adder: 250 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable relief cost = devices reviewed × relief cost per device × share requiring replacement or redesign.
  • Pressure relief sizing cost works out to 2,860 $ at these inputs, and this is the headline figure for the scenario.
  • Relief cost per reviewed device works out to 28.6 $ / piece at these inputs.
  • Variable relief hardware or sizing cost works out to 2,610 $ at these inputs.
  • Fixed relief engineering adder works out to 250 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where share requiring replacement or redesign sits at 80% and the headline result is 3,850 $, this scenario comes in 25.71% below the baseline at 2,860 $.
  • It computes the total relief sizing cost as the count of devices reviewed times the per-device cost times the fraction needing replacement, plus a fixed engineering adder. 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

  • Pressure relief sizing cost: 2,860 $ (headline result)
  • Relief cost per reviewed device: 28.6 $ / piece
  • Variable relief hardware or sizing cost: 2,610 $
  • Fixed relief engineering adder: 250 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Pressure Relief Sizing Cost calculator, set share requiring replacement or redesign to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.