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Deluge for Cryogenic Pumps

Deluge for Cryogenic Pumps

Deluge for Cryogenic Pumps

(OP)
I am a plant engineer and I have been asked to look at installing a deluge system on the flash drum pumps of our coldbox.  The pumps operate at around -40 degrees.  Every other major set of pumps in our plant was built with a deluge so I'm thinking there must be a good reason for not installing it on these pumps.  The fluid in being pumped is isobutylene.  Can any one tell me if I should or shouldn't intall a deluge on these pumps?  I am leaning towards not doing it but I need justification.  I haven't found a standard or anything that says when deluge is and isn't required.

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