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Thai Ethanolamines Co., Ltd.Integration of CENTUM CS 3000 with ProSafe-RS Improves Plant Safety and ReliabilityExecutive SummaryThai Ethanolamines Co., Ltd. (EA), a subsidiary of PTT Chemical Ltd., is the first company in Thailand to produce ethanolamine, an essential ingredient in many personal hygiene products. Made from ethylene oxide (EO) and ammonia, this chemical is also widely used in applications ranging from paint, pharmaceuticals, and cosmetics to cement, detergent, and fabric softener. The company has recently completed construction of a new ethanolamine plant at the Rayong Mapthaput Industrial Complex in Thailand’s Rayong Province.For this new plant, Yokogawa Thailand successfully installed the CENTUM CS 3000 process control system (PCS), the ProSafe-RS safety instrumented system (SIS), and the Plant Resource Manager (PRM) package.The Challenges and the SolutionsEA wants both high performance and safe operations at its new ethanolamine plant. It gets this with a fully integrated Yokogawa plant control and safety system based on the CENTUM CS 3000 PCS and ProSafe-RS SIS. This is a highly reliable system in which the PCS field control stations achieve seven 9s availability, ensuring stable and reliable control of operations for EA.To ensure safe operations at this plant, engineers from EA and the owner, licensor, and EPC conducted a careful loop-by-loop hazard and operability (HAZOP) study and defined the SIL level. The EA plant has a number of important safety valves that need to be periodically checked to make sure they will operate correctly in an emergency. Thanks to a unique PRM function that can schedule safety valve partial stroke tests and record their results, EA’s operators and engineers no longer have to put on a hard hat and go to the valve location to conduct these tests. They instead can stay in the central control room and keep an eye on the overall status of plant operations. EA is happy to have this capability as it improves both safety and productivity.The integration of the PCS and the SIS also means that their loops have the same faceplates and both use the same type of keyboard. This makes it much easier for operators to react quickly and correctly if an emergency occurs. Plant InformationLocation: Rayong, ThailandOrder date:2007Completion:200921Success Story CollectionChemical (Fine & Specialty Chemical, Biofuel)& Pharmaceutical

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