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In VGO hydrocracker and Hydrotreater, where would you put the purges for the PSVs on CHPS, HHPS etc to prevent it from plugging/fouling due to salt deposition i.e. on the common take off from the vessel or separate for each PSV, right below the seat of the PSV?
 
Answers
13/03/2013 A: keith bowers, B and B Consulting, kebowers47@gmail.com
salt deposition plugging? A purge connection on a common pipe leading to the header with multiple PSVs is just as reliable and certainly less complicated (and therefore has greater intrinsic safety) The first mantra in mechanical design of hydroprocessing units is: SIMPLICITY is Beautiful. Work hard to reduce piping complexity and potential leak points.