TY JOUR TI MANAGEMENT OF RISKS OF GAS CLEANING EQUIPMENT FAILURE KW system safety analysis KW the risk of failure KW fault trees JO Scientific and analytical journal «Vestnik Saint-Petersburg university of State fire service of EMERCOM of Russia» AU Birulev, M.U. AU Vlasov, E.A. AU Burkat, V.S. PY 2014 IS 2014 PB Saint-Petersburg University of State Fire Service of Emercom of Russia