Bubble pressures were measured for 15 binary mixtures, each composed mainly of one flammable and one non-flammable component. The mixtures were trichlorofluoromethane + isopentane, pentafluoroethane + 1,1,1-trifluoroethane, 1,1-dichloro-2,2,2-trifluoroethane + {1,1-dichloro-1-fluoroethane or isopentane}, 1,1,1,2-tetrafluoroethane + {1,1-difluoroethane or propane or cyclopropane or isobutane}, difluoromethane + {pentafluoroethane or 1,1,1,2-tetrafluoroethane or 1,1-difluoroethane}. Also studied were mixtures of 1,1-difluoroethane + {cyclopropane or propane or butane or isobutane}, which comprise two flammable components. The measurements were made at approximately equimolar compositions using either a vapour-liquid equilibrium apparatus over a range of temperatures, or a static pressure measurement at 273.15 K. The bubble pressures were used to determine interaction coefficients that characterize the non-ideal behaviour of these fluid mixtures. The interaction coefficients are used in equation-of-state models for the thermodynamic properties of refrigerant mixtures.