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Received: November 2016, Accepted: February 2017 Background: The reliability and safety of gas refineries are strongly associated with the reliability of other parts of the system. Defect and failure in one part of a system can cause total system breakdown or accident. The failure and damage in these equipment such as transformers and boilers results in not only the equipment damage and human injuries but also productivity reduction. The purpose of this study was safety assessment of glycol recovery unit in gas refinery by failure mode and effects analysis (FMEA) technique. Materials and Methods: The present study is a descriptive-analytical study done for risk assessment of glycol recovery unit of a gas refinery in one of the southern areas of Iran. FMEA method was used to identify and detect possible failures in the system. Failure modes of a component and their causes were identified and effects of identified failures were examined, then the necessary corrective measures were recommended. Results: In this research, 105 failure modes were studied. The highest risk priority number (RPN) values obtained were 150 (while removing corrosion and welding inside TK601A/B vessel which was due lack of air ventilation) and 120 (while installing the gasket). Conclusions: FMEA technique is a useful method to prevent accidents and increase safety and productivity. FMEA can identify and assess potential risks and propose corrective action required to control the risks.

Safety assessment of glycol recovery unit in a gas refinery by failure mode and effects analysis technique