ASTM D5306 Standard Test Method for Linear Flame Propagation Rate of Lubricating Oils and Hydraulic Fluids
4. Summary of Test Method
4.1 A section of a ceramic fiber support medium (string) is impregnated with the sample under specific conditions. The impregnated fiber is placed on a standard support. The sample is ignited and the time required for the flame front to propagate across a measured distance is determined by use of a thermoelectric system. The average propagation rate is then calculated from the measured distance of flame travel and the time required for the flame front to propagate over that distance.
5. Significance and Use
5.1 The linear flame propagation rate of a sample is a property that is relevant to the overall assessment of the flammability or relative ignitability of fire resistance lubricants and hydraulic fluids. It is intended to be used as a bench-scale test for distinguishing between the relative resistance to ignition of such materials. It is not intended to be used for the evaluation of the relative flammability of flammable, extremely flammable, or volatile fuels, solvents, or chemicals.
