en Occupational Health Original Article <p style="text-align: justify;"><span style="font-family: times new roman;"><strong>Background:</strong> 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.</span></p> <p style="text-align: justify;"><span style="font-family: times new roman;"><strong>Materials and Methods:</strong> 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.</span></p> <p style="text-align: justify;"><span style="font-family: times new roman;"><strong>Results:</strong> 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).</span></p> <p style="text-align: justify;"><span style="font-family: times new roman;"><strong>Conclusions:</strong> 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.</span></p> Safety,Risk Assessment,Failure Mode and Effect Analysis, 151 159 http://johe.rums.ac.ir/browse.php?a_code=A-10-108-2&slc_lang=en&sid=1 S Mahdavi smahdavi125@yahoo.com 22400319475328460011569 22400319475328460011569 No Dept. of Occupational Health Engineering, School of Health, Lorestan University of Medical Sciences, Khorramabad, Iran Lorestan University of Medical Sciences P Rasti Pisheh pegah.rastipishe@yahoo.com 22400319475328460011570 22400319475328460011570 No Tehran University of Medical Sciences, Tehran, Iran. Tehran University of Medical Sciences M Jozekanaani jozekanaani@nigc.ir 22400319475328460011571 22400319475328460011571 Yes Governing Health Section, HSE Main Office, National Iranian Gas Company (NIGC), Tehran, Iran National Iranian Gas Company (NIGC)