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Ice Formation in PSV tailpipe

Ice Formation in PSV tailpipe

Ice Formation in PSV tailpipe

(OP)
The possibility of ice formation in the flare system when high pressure wet gas stream from a separator is relieved to flare looks high.

If two-phase relief flow including the free water is considered, the situation looks worse. Does anyone know thow these scenarios are mitigated against? I can't imagine that winterizing alone, or relying on high relief velocities will altogether solve the problem.

  

RE: Ice Formation in PSV tailpipe

Auto-refrigeration is a problem for many high-pressure pressure (class 600 and higher) safety relief valves that discharge into a flare header.  This can affect the piping material when the outlet temperature is predicted below - 20 degree F.

RE: Ice Formation in PSV tailpipe

Ice formation often occurs in relief systems and is a common
excuse for using lateral tees, since they tend not to plug with ice build-up.

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