Network — Gauge-and-Tube Pressure Leg
Gauge-and-Tube Pressure Leg for ventilation network design and surveying.
Pressure-quantity surveys turn a real mine into the resistance numbers every network model needs — gauge-and-tube between stations, anemometer for Q, divide and log. A model built from surveyed R-values predicts; one built from handbook k-values only gestures. This is the conversion step.
Formula
Note: Mine ventilation is statutory and life-safety territory: airflow quantities, gas limits and re-entry times must be set by the registered ventilation engineer/manager under your jurisdiction's mining regulations — this calculator is a planning and training aid.
Gauge-and-Tube Pressure Leg for ventilation network design and surveying. A free mine ventilation & air quality tool — no sign-up, no upload, instant results in your browser.
About Network — Gauge-and-Tube Pressure Leg
Network — Gauge-and-Tube Pressure Leg computes the governing relationship R = p / Q² live as you type. Pressure-quantity surveys turn a real mine into the resistance numbers every network model needs — gauge-and-tube between stations, anemometer for Q, divide and log. A model built from surveyed R-values predicts; one built from handbook k-values only gestures. This is the conversion step. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Network — Gauge-and-Tube Pressure Leg
- 1Enter your values — Frictional loss measured, Quantity in the leg (sensible defaults are pre-filled).
- 2Read the live results: Leg resistance.
- 3Check the "with your numbers" line to see R = p / Q² substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Network — Gauge-and-Tube Pressure Leg?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula R = p / Q² with authoritative sources cited on the page (McPherson, M.J., Subsurface Ventilation and Environmental Engineering; Hartman et al., Mine Ventilation and Air Conditioning, 3rd ed.)
- ✓Pressure-quantity surveys turn a real mine into the resistance numbers every network model needs — gauge-and-tube between stations, anemometer for Q, divide and log.
- ✓SI ⇄ Imperial toggle converts your inputs in place, so you can work in the units your drawings use
Frequently asked questions
What formula does the network — gauge-and-tube pressure leg use?+
It evaluates R = p / Q², exactly as published. Sources: McPherson, M.J., Subsurface Ventilation and Environmental Engineering; Hartman et al., Mine Ventilation and Air Conditioning, 3rd ed.. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
Pressure-quantity surveys turn a real mine into the resistance numbers every network model needs — gauge-and-tube between stations, anemometer for Q, divide and log. Mine ventilation is statutory and life-safety territory: airflow quantities, gas limits and re-entry times must be set by the registered ventilation engineer/manager under your jurisdiction's mining regulations — this calculator is a planning and training aid.
When is this calculator the right tool for the job?+
Gauge-and-Tube Pressure Leg for ventilation network design and surveying. A free mine ventilation & air quality tool. A model built from surveyed R-values predicts; one built from handbook k-values only gestures. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Does it support both metric and imperial units?+
Yes — the SI ⇄ Imperial toggle converts the values already in the fields, preserving the physical quantity, so you can flip mid-calculation without re-entering anything.
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