Processing, April 2018
COVER Series Oil Gas Redundant valve manifolds h e l p H I P P S hen an upstream process operates at a higher pressure than the processes flows and equipment downstream from it there is risk W of over pressurization resulting in a rupture or explosion Historically re neries and chemical processing plants have relied on relief valves to exhaust gas into the air when pressures got too high However environmental regulations limiting emissions make this impractical Exhausting pressurized gas to air also raises safety concerns Another option is to beef up downstream equipment to withstand higher pressures than processes require but that drives up costs and may not even be feasible within the design footprint The current state of the art solution is a high integrity pressure protection system HIPPS A HIPPS is a functional not passive safety system is means it operates to achieve a safe state A HIPPS includes sensors a logic solver and nal elements solenoid actuator and process control valve to shut o the source of over pressure A HIPPS is designed to act as quickly and reliably as a relief valve without the environmental and safety issues 26 Processing APRIL 2018 ac h i e v e S I L 3 Oil and gas producers can meet IEC standards and keep their plants employees and communities safe with this design By Abby Sanchez IMI Norgren
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