ASTM D1401-12

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Designation: D1401 − 12
StandardTest Method for
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Water Separability of Petroleum Oils and Synthetic Fluids
This standard is issued under the fixed designation D1401; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* D665 Test Method for Rust-Preventing Characteristics of
Inhibited Mineral Oil in the Presence of Water
1.1 This test method covers measurement of the ability of
D1141 Practice for the Preparation of Substitute Ocean
petroleum oils or synthetic fluids to separate from water.
Water
Although developed specifically for steam-turbine oils having
2 D1193 Specification for Reagent Water
viscosities of 28.8–90 mm /s at 40°C, this test method may be
D2711 Test Method for Demulsibility Characteristics of
used to test oils of other types having various viscosities and
Lubricating Oils
synthetic fluids at other test temperatures. It is recommended,
D4057 Practice for Manual Sampling of Petroleum and
however, that the test temperature be raised to 82 6 1°C when
2 Petroleum Products
testing products more viscous than 90 mm /s at 40°C. For
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2.2 ISO Standards:
higher viscosity oils where there is insufficient mixing of oil
BS EN ISO 3696:1995 Water for analytical laboratory use –
and water, Test Method D2711 is recommended. Other test
Specification and test methods
temperatures such as 25°C may also be used. A1% sodium
choloride (NaCl) solution or synthetic seawater may be used in
3. Summary of Test Method
place of distilled water when testing certain oils or fuels used
3.1 A test specimen consisting of a 40-mL sample and a
in marine applications.
40-mL quantity of distilled water, or 1% sodium chloride
1.2 When testing synthetic fluids whose relative densities
(NaCl) solution or synthetic seawater are stirred for 5 min in a
are greater than that of water, the procedure is unchanged, but
graduated cylinder at 54°C or 82°C, depending upon the
it should be noted that the water will probably float on the
viscosityofthetestspecimenorsamplespecification.Thetime
emulsion or liquid.
required for the separation of the emulsion thus formed is
1.3 The values stated in SI units are to be regarded as
recorded either after every 5 min or at the specification time
standard. No other units of measurement are included in this
limit. If complete separation or emulsion reduction to 3 mL or
standard.
less does not occur after standing for 30 min or some other
1.4 This standard does not purport to address all of the
specificationtimelimit,thevolumesofoil(orfluid),water,and
safety concerns, if any, associated with its use. It is the emulsion remaining at the time are reported.
responsibility of the user of this standard to establish appro-
4. Significance and Use
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For specific
4.1 This test method provides a guide for determining the
warning statements, see Section 6.
water separation characteristics of oils subject to water con-
tamination and turbulence. It is used for specification of new
2. Referenced Documents
oils and monitoring of in-service oils.
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2.1 ASTM Standards:
5. Apparatus
5.1 Cylinder, 100-mL, graduated from 5 to 100 mL in
1.0-mL divisions, made of glass, heat-resistant glass, like
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This test method is under the jurisdiction of ASTM Committee D02 on
borosilicate glass, or a chemical equivalent. The inside diam-
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.C0.02 on Corrosion and Water/Air Separability.
eter shall be no less than 27 mm and no more than 30 mm
Current edition approved May 15, 2012. Published August 2012. Originally
throughout its length, measured from the top to a point 6 mm
approved in 1964. Last previous edition approved in 2010 as D1401–10. DOI:
10.1520/D1401-12.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from International Organization for Standardization (ISO), 1, ch. de
Standards volume information, refer to the standard’s Document Summary page on la Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http://
the ASTM website. www.iso.ch.
*A Summary of Changes section appears at the end of this standard
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D1401 − 12
from the bottom of the cylinder. The overall heigh
...