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Heat Exchanger Tube Rupture Consideration

psv tube rupture heat exchanger steam service shell side tube side

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#1 QuantumEng


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Posted 24 October 2023 - 02:07 PM

Hello all,


I have a question regarding tube rupture scenarios for S&T heat exchangers. Typically we see the tube side MAWP being higher than the shell side, however the evaporator in question is designed as follows:


Shell side MAWP: 300 psig, low bp liquid evaporated. Protected by PSV set at 300 psig likely for a blocked outlet scenario.

Tube side MAWP: 150 psig, steam service


Per the typical 2/3rds or 10/13ths standard, a tube rupture scenario would be considered. As mentioned, typically it is the shell side that is being protected if a higher pressure tube ruptures.

Is it realistic to consider a tube rupture resulting in process fluid flowing from the higher pressure shell side into the lower pressure tube?

Please see generic diagram below. Process is proprietary so I cannot provide detailed P&IDs.


Edit: Attached JPEG

Attached Files

Edited by QuantumEng, 24 October 2023 - 02:11 PM.

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