Tip Hydraulics & Sizing
Required Tip Diameter (Rec.):
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Gas Exit Velocity:
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Mach Number:
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Tip Pressure Drop:
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Velocity Check:
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Combustion & Radiation
Heat Release Rate:
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Flame Length (Est.):
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Max Radiation (Grade):
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Safe Distance (Personnel):
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Safe Distance (Equipment):
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Stack & Performance
Min. Stack Height (calc):
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Height Adequacy:
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Smokeless Check:
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Steam Requirement:
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Est. Noise Level:
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Technical Notes
Variable Definitions
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mΜgas: Waste gas mass flow (kg/h).
- MW: Molecular Weight (g/mol).
- HV: Lower Heating Value (MJ/kg).
- v: Exit velocity (m/s).
- QΜ: Heat release rate (kW).
- qβ³: Radiant heat flux (kW/mΒ²).
Formulas / Logic
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Density: Ideal gas law at flare header pressure +
atmospheric.
- Mach: v / c, where c = β(Ξ³Β·RΒ·T).
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Radiation: Point-source model: qβ³ = (ΟΒ·QΜ)/(4ΟRΒ²).
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Flame Length: API-style empirical correlation
based on heat release.
Assumptions / Standards
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Screening Tool: Preliminary checks only. Final
design should follow API 521 (relieving basis,
flare header hydraulics, dispersion/radiation, staged relief) and
vendor-specific flare tip technology.
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Smokeless: Steam ratio check is a heuristic;
actual requirement depends on tip technology.
- Noise: Order-of-magnitude estimate only.