Standard ASTM D 1401: Evaluation of water separation in oils and fluids
This test method covers the measurement of the ability of petroleum oils or other synthetic fluids to separate from water. Although developed specifically for steam turbine oils having viscosities of 28.8mm2/S to 90mm2/S and 40°C, this test method may be used to test oils of other types having various viscosities and synthetic fluids at other test temperatures.