Effective process safety management for highly hazardous chemicals Piyanart Sommani, Anchaleeporn Waritswat Lothongkum, Panuwat Jumpasri, Nichit Hongbin and Wasana Kowhakul MATEC Web Conf., 268 (2019) 02007 Published online: 20 February 2019 DOI: 10.1051/matecconf/201926802007