BS ISO 2176:1995+A1:2020,Petroleum products – Lubricating grease – Determination of dropping point.
In general, the dropping point of a lubricating grease is the temperature at which the grease passes from a semisolid to a liquid state under the conditions of test. This change in state is typical of greases containing soaps of conventional types as thickeners. Greases containing materials other than conventional soaps as thickeners may, without change in state, exhibit oil separation.
Cooperative testing indicates that results determined by this International Standard are generally in agreement with those obtained by the method, to be given in a future International Standard on lubricating greases, for the determination of dropping point (wide temperature range).In cases where results differ, there is no known significance. However, agreement between producer, consumer and supplier as to the test method to be used is advisable.
BS ISO 2176:1995+A1:2020 specifies a method for the determination of the dropping point of lubricating grease.
Expression of results
The results shall be expressed as the average of the two temperature readings, one on the thermometer in the oil bath and the other on the thermometer in the test tube,taken to the nearest l°C.
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