A flare stack protects a plant by safely burning off excess gas during upsets and emergencies. Without precise modelling, however, the same flare can become a hazard to people and nearby assets. A comprehensive Flare Radiation and Dispersion Study is a fundamental tool for validating that flare systems are safe and compliant.
What is a flare radiation and dispersion study?
It is a technical analysis that evaluates the impact of flare operations under various scenarios. By modelling heat intensity and gas spread, it ensures that flare systems comply with international safety standards and operate within risk-controlled boundaries.
Key safety principles
- Regulatory compliance. Adherence to stringent standards such as OISD and EPA to limit environmental impact.
- Safety assurance. Protection of public health and plant personnel by quantifying the effects of hazardous emissions.
- System optimisation. Higher efficiency and reliability of flaring operations through data-driven design.
- Worst-case modelling. Simulation of extreme flow rates and environmental conditions to validate safety distances.
Integrated design inputs
Precise results depend on multidisciplinary data:
- Flare specifications. Tip height, diameter and design flow rates.
- Process data. Detailed gas composition, operating temperatures and pressures.
- Environmental factors. Site-specific wind speed, wind direction and atmospheric stability.
- Exposure limits. STEL, IDLH and ERPG thresholds for toxic assessment.
Key analysis outputs
Using software tools such as PHAST, FlareSim and AERMOD, the study produces:
- Heat radiation contours. Radiation intensity against distance, defining safety zones.
- Toxic release isopleths. Cloud dispersion height and downwind spread.
- LFL cloud mapping. Flammable gas boundaries, to prevent secondary ignition.
- Engineering recommendations. Technical advice on flare tip height and location.
How EnTech can help
We provide expert simulation and consequence modelling, full regulatory validation, optimised designs for maximum risk reduction, and comprehensive technical reports with contour maps. Contact us at info@EnTech-Solution.com.