fa تجزیه و تحلیل حالات نقص تجهیزات فرایندی در یک صنعت شیمیایی میکرو ارگونومی Micro Ergonomics پژوهشي Research <p align="right">چکیده</p> <p> <strong> Background and aims </strong></p><p> <strong> </strong>Prevention of potential accidents and safety promotion in chemical processes requires systematic safety management in them. The main objective of this study was analysis of important process equipment components failure modes and effects in H2S and CO2  isolation from extracted natural gas process. </p><p> <strong> Methods </strong></p><p> <strong> </strong>This study was done in sweetening unit of an Iranian gas refinery. Failure Mode and Effect Analysis (FMEA) used for identification of process equipments failures. </p><p> <strong> Results </strong></p><p>  Totally 30 failures identified and evaluated using FMEA. P-1 blower's blade breaking and sour gas pressure control valve bearing tight moving had maximum risk Priority number (RPN), P-1 body corrosion and increasing plug lower side angle of reach DEAlevel control valve  in tower - 1 were minimum calculated RPN. </p><p> <strong> Conclusion </strong></p><p> <strong> </strong>By providing a reliable documentation system for equipment failures and  incidents recording, maintaining of basic information for later safety assessments would be  possible. Also, the probability of failures and effects could be minimized by conducting preventive maintenance. </p> چگونگی وقوع نقص و تجزیه و تحلیل اثرات آن (FMEA)، ایمنی، شیرین سازی گاز طبیعی Failure Mode and Effect Analysis (FMEA), Safety, Risk, Natural gas sweetening 31 38 http://ioh.iums.ac.ir/browse.php?a_code=A-10-3-18&slc_lang=fa&sid=1 A. Ghahramani بوالفضل قهرمانی ri.ca.usmu@inamarhahG 1360031947532846002990 1360031947532846002990 Yes Faculty of Health, Uremia MedicalScience University (UMSU). J. Adl جواد عدل 1360031947532846002991 1360031947532846002991 No J. Nasl Seraji جبرائیل نسل سراجی 1360031947532846002992 1360031947532846002992 No