Section 62F(4) in The Orissa Factories Rules, 1950
(4)A suitable safety valve or rupture disc of adequate size old capacity shall be provided to effectively prevent the pressure being built up in the reaction vessel beyond the safe limit. Effective arrangements shall be made to ensure that the released, gases, fumes, vapours, liquids or dusts, as the case may be, are led away and disposed of through suitable pipes without causing any hazard where flammable gases or vapours are likely to be vented out from the vessel, and the discharge end shall be provided with a flame arrestor.