ASTM D892-06e1
(Test Method)Standard Test Method for Foaming Characteristics of Lubricating Oils
Standard Test Method for Foaming Characteristics of Lubricating Oils
SIGNIFICANCE AND USE
The tendency of oils to foam can be a serious problem in systems such as high-speed gearing, high-volume pumping, and splash lubrication. Inadequate lubrication, cavitation, and overflow loss of lubricant can lead to mechanical failure. This test method is used in the evaluation of oils for such operating conditions.
SCOPE
1.1 This test method covers the determination of the foaming characteristics of lubricating oils at 24°C and 93.5°C. Means of empirically rating the foaming tendency and the stability of the foam are described.
1.2 &si-value;
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see Sections 7, 8, and 9.1.1.
General Information
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Standards Content (Sample)
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British Standard 5092
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Designation:D892–06
Designation: 146/2000
Standard Test Method for
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Foaming Characteristics of Lubricating Oils
This standard is issued under the fixed designation D892; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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.
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´ NOTE—Corrected wording in X2.1.2 and added research report number to X2.7 editorially in September 2007.
1. Scope* E1272 Specification for Laboratory Glass Graduated Cylin-
ders
1.1 This test method covers the determination of the foam-
ing characteristics of lubricating oils at 24°C and 93.5°C.
3. Terminology
Means of empirically rating the foaming tendency and the
3.1 Definitions:
stability of the foam are described.
3.1.1 diffuser, n—for gas, a device for dispersing gas into a
1.2 The values stated in SI units are to be regarded as the
fluid.
standard. The values given in parentheses are for information
3.1.1.1 Discussion—In this test method the diffuser may be
only.
made of either metallic or non-metallic materials.
1.3 This standard does not purport to address all of the
3.1.2 entrained air (or gas), n—in liquids, a two-phase
safety concerns, if any, associated with its use. It is the
mixture of air (or gas) dispersed in a liquid in which the
responsibility of the user of this standard to establish appro-
volume of the liquid is the major component.
priate safety and health practices and determine the applica-
3.1.2.1 Discussion—The air (or gas) is in the form of
bility of regulatory limitations prior to use. For specific
discrete bubbles of about 10 to 1000 µm in diameter. The
warning statements, see Sections 7, 8, and 9.1.1.
bubbles are not uniformly dispersed. In time they tend to rise
2. Referenced Documents tothesurfacetocoalescetoformlargerbubbleswhichbreakor
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form foam. Subsurface coalescence can also occur, in which
2.1 ASTM Standards:
case, the bubbles rise more rapidly.
D445 Test Method for Kinematic Viscosity of Transparent
3.1.3 foam, n—in liquids, a collection of bubbles formed in
and Opaque Liquids (and Calculation of Dynamic Viscos-
the liquid or on (at) its surface in which the air (or gas) is the
ity)
major component on a volumetric basis.
D6082 Test Method for High Temperature Foaming Char-
3.1.4 lubricant, n—any material interposed between two
acteristics of Lubricating Oils
surfaces that reduces friction or wear between them. D6082
E1 Specification for ASTM Liquid-in-Glass Thermometers
3.1.4.1 Discussion—In this test method, the lubricant is an
E128 Test Method for Maximum Pore Diameter and Per-
oil which may or may not contain additives such as foam
meability of Rigid Porous Filters for Laboratory Use
inhibitors.
3.1.5 maximum pore diameter, n—in gas diffusion, the
diameter a capillary of circular cross section which is equiva-
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This test method is under the jurisdiction of ASTM Committee D02 on
lent (with respect to surface tension effects) to the largest pore
PetroleumProductsandLubricantsandisthedirectresponsibilityofSubcommittee
of the diffuser under consideration.
D02.06 on Analysis of Lubricants.
Current edition approved Aug. 1, 2006. Published August 2006. Originally
3.1.5.1 Discussion—The pore dimension is expressed in
approved in 1946. Last previous edition approved in 2005 as D892–05.
micrometres in this test method.
In the IP, this test method is under the jurisdiction of the Standardization
3.1.6 permeability, n—in gas diffusion, the flow of gas,
Committee. This test method has been approved by the sponsoring committees and
through the gas diffuser.
accepted by the cooperating societies in accordance with established procedures.
DOI: 10.1520/D0892-06E01.
3.1.6.1 Discussion—In this test method, the permeability is
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
measured at a pressure of 2.45 kPa (250 mm of water) in
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
millilitres per minute.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 3.2 Definitions of Terms Specific to This Standard:
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D892–06
FIG. 1 Foaming Test Apparatus
3.2.1 dynamic bubble, n—the first bubble to pass through cylinder or cylinders (meeting Specification E1272 class B
and escape from the diffuser followed by a continuous succes- tolerance
...
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