Brindley Engineering’s Process department reviewed the overall collection system P&IDs and worked with the client to provide a cost-effective solution to this hydraulic concern. The collection system included sour water sources from numerous units within the refinery, covering a large geographical area. Hence, rather than model the entire system, involving a comprehensive field walkdown of all piping within the system, it was suggested that the portion of the piping being replaced was hydraulically modeled utilizing both the current size and the future (proposed) size to determine a predicted gain from the reduced pressure drop. This hydraulic model was built using Korf Hydraulics, a hydraulic modeling software.
Based on all other elements of the system remained unchanged, the calculated pressure drop was then applied to all control valves within the collection system. Data was collected for each control valve and each was then modeled using Korf Hydraulics to determine if the valve was still working within a controllable range.