thanks flareman and JWYsmooth for your responses. That was very helpful. I spoke with someone from one of the flare tip manufacturers with a lot of experience and he agreed with what you said. I'd say so much so that I almost wonder if you are him! I have the same concerns about the tall...
I think you are right that this is a double jeopardy case to be blocked in and have a fire but if you feel you need to calculate a fire case I would think API's fire circle area of 2500 - 5000 ft2 would make sense (I'm sure 2500 is mentioned and think the range goes up to 5000 ft2).
Therefore...
We currently have two flares (30 inch and 12 inch) and are considering some options to try to improve the reliability of our pilot sensors.
Currently both flares use thermocouples on each pilot and of the five total pilots only two of the thermocouples are providing accurate readings.
We...