24 bar (intermediate pressure-IP): Largely produced in the electricity-generating steam turbines, is routed to the process units for several purposes (stripping, turbines, heat-exchange and steam ejectors). High pressure steam (80 bar) can also be also “letdown” into the 24 bar steam header to maintain at the set point value. Moreover, the IP steam is also produced in the process units.
10.5 bar (medium pressure-MP): Produced in 24 ” 10.5 bar turbines and “letdown” valves, is used in utility stations around de refinery and some specific applications for which low-pressure steam does not have enough temperature. Each Production Process Plant manages its own MP steam.
3.5 bar (low pressure-LP): Produced in steam turbines (electricity-generating and others), “letdown” valves and process units.