Adequacy of Hydrocracker Emergency Relief System Case Study The Challenge A refinery approached ioMosaic for the purposes of ensuring that pressure relief capacity was adequate for the loss of liquid seal scenario in a high-pressure separator (2,000 psig). They were also concerned about the pressure waves that would occur in the high-pressure separator’s outlet lines on rapid closing of the isolation valves and sought our expertise. Our Approach Using our SuperChemsTM Expert software, a component of Process Safety Office®, we were able to model the system between the high-pressure separator and the down stream vessel. The system consisted of three parallel flow paths. In one path, there was a power recovery turbine that was modeled. The othertwo flow paths contained control valves. The flu

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