A A JULY 2022 | HydrocarbonProcessing.com OPTIMIZING FLOW CONTROL WITH VALVES, PUMPS AND TURBOMACHINERY TECHNOLOGIES BEST PRACTICES for hydroprocessing catalysts changeout HISTORY OF THE HPI: Oil spike/collapse, liquid crystals, conducting polymers, environment/safety and the rise of AR/VR N R N S Y IV E Rhttp://www.HydrocarbonProcessing.com