Gas Flow & Runtime
Turn a stated available reference quantity and a stated reference flow into a runtime. Declare each ideal reference basis so a demand can be normalized before it is compared with available gas.
FreeNo sign-upPrivate — runs in your browser, nothing is uploaded
Demand may use a different explicit ideal reference condition. It is normalized to the available/cylinder basis before runtime and requirement are calculated. This is not actual-flow, regulator or vaporizer sizing.
Verify a saved calculation passport
Paste a local passport JSON to verify its envelope and SHA-256 hashes in this browser. This checks integrity only; it does not rerun the physical calculation.
Quick answer
Runtime equals available quantity divided by demand after both have the same declared reference convention. This tool normalizes ideal reference flow, not actual flow.
Formula & method
Q₂ = Q₁ × (P₁/P₂) × (T₂/T₁); runtime = available reference volume ÷ normalized demand rate
- basis — declared physical interpretation and units
All calculations retain their declared conditions and do not invent missing physical context.
Examples
- Input
- 500 Nm³ available at 0 °C and 25 m³/h at a different declared ideal basis is first normalized to the available basis.
- Result
- A labeled browser-local result or an explicit unavailable state
- Why
- The result keeps the required material, state and model context visible.
- Input
- A required material, basis or state is absent
- Result
- Needs-input status
- Why
- The workspace asks for the missing dependency instead of assuming it.
- Input
- A request outside the admitted capability
- Result
- Unavailable status
- Why
- No ideal or zero-valued fallback is substituted.
When to use this tool
- Normalizing an ideal reference flow before estimating runtime.
- Planning a shift or period demand.
- Checking an available reserve.
Common mistakes
- Mixing actual flow with ideal reference flow.
- Ignoring a reserve or holdback.
- Reading runtime as a regulator sizing result.
Assumptions
What the result takes for granted:
- Every reference pressure is absolute and every reference temperature is positive.
- Demand is positive and constant for the estimate.
- No flow data leaves the browser.
Limitations
Where this tool stops — and what to use instead:
- Not a regulator, vaporizer or pressure-drop calculation.
- Does not model intermittent demand automatically.
- Actual-flow conversion requires a separately admitted physical state.
Frequently asked questions
Does this send my data to a server?
No. This gas workspace processes the declared inputs in your browser.
Why can a result be unavailable?
The requested material, state, output or interpretation may need information that has not been declared or is outside the admitted capability.
Can I rely on this for safety-critical work?
No. Verify the stated basis and use applicable standards, instrument data and qualified engineering review for safety-critical or custody-transfer decisions.
Sources & references
External references open in a new tab. We are independent and not affiliated with these organizations.
- ✓ Free to use
- ✓ No sign-up required
- ✓ Runs entirely in your browser — nothing is uploaded.
- ✓ Formula and method shown above
Provided “as is” for general information only — results may be inaccurate, so verify before you rely on them. No warranty; use at your own risk.
Built and reviewed by HIFreeTools against the formula shown above and any authoritative references cited on this page. See our methodology and editorial standards.
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