Heat Treatment, Furnaces & Thermal Processing worked example

Furnace Atmosphere Leak Cost at 72% share of leak cost charged to this job: a worked example

Suppose share of leak cost charged to this job falls to 72%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate the cost impact of furnace atmosphere leaks from excess gas use, gas cost rate, capture percent, and fixed leak repair or purge cost.

The inputs for this scenario

  • Excess protective atmosphere gas consumed: 15,000 scf (held at the documented default)
  • Protective atmosphere gas unit cost: 0.02 $ / scf (held at the documented default)
  • Share of leak cost charged to this job: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed leak repair or purge cost: 650 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Captured atmosphere leak cost = excess gas × gas cost rate × leak cost capture.
  • Total atmosphere leak cost works out to 844 $ at these inputs, and this is the headline figure for the scenario.
  • Leak cost per scf works out to 0.06 $ / scf at these inputs.
  • Captured excess gas cost works out to 194 $ at these inputs.
  • Fixed leak repair or purge cost works out to 650 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where share of leak cost charged to this job sits at 100% and the headline result is 920 $, this scenario comes in 8.22% below the baseline at 844 $.
  • It computes the cost of excess atmosphere gas as excess scf times the gas cost rate times a capture share, then adds any fixed repair or purge cost for a total leak cost. 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 atmosphere leak cost: 844 $ (headline result)
  • Leak cost per scf: 0.06 $ / scf
  • Captured excess gas cost: 194 $
  • Fixed leak repair or purge cost: 650 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Furnace Atmosphere Leak Cost calculator, set share of leak cost charged to this job to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.