Topic summary
Flare stack

Extracted from the Wikipedia article Gas flare.
Flare stack height
The height of a flare stack, or the reach of a flare boom, is determined by the thermal radiation that is permissible or tolerable for equipment or personnel to be exposed to. For continuous exposure of personnel wearing appropriate industrial clothing a maximum radiation level of 1.58 kW/m (500 Btu/hr.ft²) is recommended. Higher radiation levels are permissible but for reduced exposure times: