3. Summary of Test Method
3.1 A test specimen consisting of a 40-mL sample and a 40-mL quantity of distilled water, or 1% sodium chloride (NaCl) solution or synthetic seawater are stirred for 5 min in a graduated cylinder at 54°C or 82°C, depending upon the viscosity of the test specimen or sample specification. The time required for the separation of the emulsion thus formed is recorded either after every 5 min or at the specification time limit. If complete separation or emulsion reduction to 3 mL or less does not occur after standing for 30 min or some other specification time limit, the volumes of oil (or fiuid), water, and emulsion remaining at the time are reported.
4. Significance and Use
4.1 This test method provides a guide for determining the water separation characteristics of oils subject to water contamination and turbulence. It is used for specification of new oils and monitoring of in-service oils.
