By two phases are you referring to split-phase? This is really a single phase 460V supply with a centre-tap as neutral, to give two equally-rated supplies of 230V. As far as loads are concerned it is no different to single-phase except that you have to spread the loads across two supplies. It is no longer a common method of supply here, it was used in the past (and is standard in the USA at half the voltage i.e. 120-0-120 =240V between lines). Two fully rated lines and ideally a fully rated neutral are needed for the service cable, i.e. less copper than single-phase, but not a common config these days. Only single-phase HV supply needed at the sub.
If you are referring to two phases of a 3-phase supply I wonder how and why they would have this available, but not have the third phase? I suppose when you say there is no 3-phase nearby it depends whether that means no 3-phase HV or sub, or whether there is 3-phase LV available at the TX but the distributor / service cables are all single-phase. Two phases of a 3-phase supply are no more or less suitable than split-phase for multiple single-phase loads, except that the line-line voltage is 400 not 460V. A few larger single-phase devices such as welders can sometimes be switched to 400V to balance their load between the lines and reduce the final circuit current.
