Abstract: A flare tank apparatus for separating combustible gases from a mixture of such gases and a liquid, for example combustible gases in drilling fluid from an oil or gas drill string. The apparatus has an inlet conduit having two or more connectors which permit components of the inlet conduit to swivel relative to each other. The connectors can be loosened to permit swivelling without disassembling the inlet conduit. The swivelling of the connectors permits the free end of the inlet conduit to be moved and positioned for connection to the outlet end of a flare line from the drill string and to be positioned against the holding tank of the flare tank apparatus for convenient transport.