Standard Practice for Evaluating Compatibility of Mixtures of Turbine Lubricating Oils

Importancia y uso:

5.1 The compatibility of oils can be important for users of oil-lubricated equipment. Mixing of two oils can produce a substance markedly inferior to either of its constituent materials. One or more of the following can occur:

5.1.1 A mixture of incompatible oils most often forms a precipitate. The precipitate will form unwanted deposits in the lubrication system, plug filters, and oil passageways.

5.1.2 A mixture of incompatible oils will sometimes exhibit degradation of certain performance parameters like demulsibility, foam inhibition oxidation stability, rust protection ability, or antiwear protection ability.

5.1.3 A mixture of incompatible oils will sometimes exhibit non-miscibility of the base oils with each other.

5.1.4 Such incompatibilities can lead to catastrophic equipment failures.

5.2 To minimize the chances of these problems occurring, lubricant suppliers recommend evaluating compatibility of lubricating oil of different formulations and sources prior to mixing. Equipment users most often do not have the resources to evaluate oil compatibility and must rely on their suppliers. Mixing of oils without first determining the compatibility is a highly imprudent practice.

5.3 Although new turbine oils may be compatible, in-service oil of the same type may be degraded or contaminated to such an extent that the new oil added may not be compatible with the system oil. In-service oil compatibility with new oil additions should be evaluated on a case-by-case basis.

5.4 The oxidation resistance of different oils of the same type can vary widely, and compatibility does not imply equivalent performance without oxidation performance testing.

Subcomité:

D02.C0.01

Referida por:

D6439-23, D6224-23, D4378-24, D4304-22, D8579-24, D8506-23

Volúmen:

05.03

Número ICS:

75.100 (Lubricants, industrial oils and related products)

Palabras clave:

compatibility; incompatibility; lubricant mixtures; lubricating oil; mixtures;