Section 49C(4) in The West Bengal Factories Rules, 1958
(4)A suitable safety valve or rupture disc of adequate size and capacity shall be provided to effectively prevent the pressure being built up in the reaction vessel beyond the safe limit. Effective arrangement shall also be made to ensure that the released gas, 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 gas or vapours are likely to be vented out from the vessel, the discharge end shall be provided with a flame arrester.
