2 replies to this topic

[Ryush806]

All,

 

I am doing some work at a bulk LPG storage facility. They will have a horizontal flare and will need a continuous gas purge on it. I have found many resources for calculating the purge requirements for a typical vertical flare (API 521, Husa, etc). Can these methods be applied to a horizontal flare? Do they need any modification or are there any caveats? If these methods are not applicable, do you know of any resource I can use to calculate purge requirements for a horizontal flare?

 

I very much appreciate any help you can provide.

 

[Edit]: Also, since there is ample supply of propane at this facility, I would like to at least consider using it as the purge gas. Do not know if that will influence your answer or not but thought it was worth mentioning.

Edited by Ryush806, 24 October 2014 - 09:25 AM.

[shan]

Flare purge is to prevent air ingress with out flow gas in specific velocity .  It dose not matter the vertical flare stack or horizontal flare stack or any angle flare stack in term of purge requirements.

 

Is it safe to release C3 from a horizontal flare stack at the grid level?

[Ryush806]

Shan, thanks for your reply. To your question, the flare will have a burn pit and the purge propane would have to be burned. I understand that brings up some environmental issues which will probably be a hassle.

 

Alternatively I'm looking at a seal pot as the flare will be very small/short so the amount of unburned gas that could accumulate falls well below anything that could cause an issue. I believe according to API 521 that a seal pot can take the place of a continuous purge in this case.