Tehran University of Medical Sciences International Journal of Occupational Hygiene 2008-5109 5 2 2015 10 11 71 75 EN MOHAMMAD AMIN NOROZI Department of Occupational Health, School of Health and Nutrition, Shiraz University of Medical Sciences, Shiraz, Iran. MEHDI JAHANGIRI Department of Occupational Health, School of Public Health and Nutrition, Shiraz University of Medical Sciences, Shiraz, Iran. ALIREZA CHOOBINEH Research Center for Health Sciences, Shiraz University of Medical Sciences, Shiraz, Iran. ALIREZA NARIMANNEJAD HSE Department, National Petrochemical Company, Iran. 2015 10 10 2015 10 10 The establishment of good process safety management (PSM) is widely considered as the most effective means of improving safety levels in process industries. This study was conducted to evaluate the feasibility of establishing and implementing PSM requirements based on Occupational Health and Safety Assessment Series 18001 standards (OHSAS 18001) and Health, Safety and Environment management systems (HSE-MS) in an Iranian petrochemical plant. Firstly, the requirements of PSM, OHSAS 18001 standards and HSE-MS were compared via literature review and their levels of agreement were determined. Next, the degree of implementation of PSM requirements at a selected petrochemical site was investigated. The study’s results show that PSM requirements complied with HSE-MS to a greater degree than with OHSAS 18001 standards. Although the plant studied had not yet formally applied process safety management requirements, based on the HSE-MS and OHSAS 18001 it had already applied, 67% of PSM requirements had in effect been put in place. By revising certain requirements of existing management systems, including PSM requirements in them, and providing the outstanding necessary documentation, this study concludes that the establishment of a PSM system in the plant is feasible. https://ijoh.tums.ac.ir/index.php/ijoh/article/view/70 https://ijoh.tums.ac.ir/index.php/ijoh/article/download/70/70