Tehran University of Medical Sciences International Journal of Occupational Hygiene 2008-5109 10 3 2018 08 30 172 179 EN MOAHAMMAD BARATCHI M.Sc., Department of Environmental Management (HSE), Faulty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran. NABIOLLAH MANSOURI Professor, Department of Environmental Engineering, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran AIDA AHMADI Assistant Professor, Department of Environmental Management (HSE), Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran 2018 05 15 2019 10 15 Steam boiler is a common primary utility that creates steam by applying heat energy to water in a close system and poses different threats. The present study aimed to identify health, safety, and environmental hazards by implementing Hazard Identification (HAZID) method and Analytical Network Process (ANP). Therefore, the identified hazards were categorized and scored by HAZID method and then, prioritized using ANP. A total number of 58 hazards were identified in 4 categories; of which, 6 hazards were weighted by the super decisions software. According to the results, job stress and cooling system wastewater were recognized as the most and the least important hazards, respectively. https://ijoh.tums.ac.ir/index.php/ijoh/article/view/343