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Hanwha Chemical CorporationHighly Reliable CENTUM CS 3000 Replaces Legacy System and Automates Batch Plant OperationsExecutive SummaryHanwha Chemical Corporation, a major Korean petrochemical company, produces polyvinyl chloride (PVC), vinyl chloride monomer (VCM), low-density polyethylene (LDPE), and other products. In 2009, the company acquired three plants from OCI Co., Ltd. that produce phthalic anhydride (PA), plasticizer (PLS), and maleic anhydride (MA) for both the domestic and international markets. Hanwha is continually striving to introduce new technologies that will help attain operational excellence and improve product quality. The high cost of replacement parts and software modifications for a legacy control system together with the desire to improve availability motivated Hanwha Chemical to replace the system at one of the acquired plants with a Yokogawa CENTUM CS 3000 distributed control system (DCS). The existing system included one engineering workstation (EWS), three controllers for PA, MA, and PLS, and five graphical user stations (GUS) within the same control network. There were approximately 2,000 I/O.The new control system configuration is shown below.Plant InformationLocation:Ulsan, South KoreaOrder date:May 2010Completion:February 201133Success Story CollectionChemical (Fine & Specialty Chemical, Biofuel)& Pharmaceutical

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