Flare header connections

[MikalT]

We've got a client who wants to connect a pressure relief discharge to the bottom of the flare header... I know that recommended practice is to connect to the top of a flare header to prevent condensables from traveling back toward the relief device. Is there some ASME, API, OSHA code that specifically states not to connect to the bottom of a flare header? Any help with this is appreciated!

 

[svanels]

Why does he wants to connect it there? space probems? Steven van Els
SAvanEls@cq-link.sr

 

[StressGuy]

Well, make sure the process guy sizing the PSV accounts for that full liquid column he'll have sitting on top of that discharge.

Or, you could just have them drill a weep hole at that first elbow, like on an open PSV to drain the liquid.

Yes, that last one was a joke! Edward L. Klein
Pipe Stress Engineer
Houston, Texas

All opinions expressed here are my own and not my company's.