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ASTM D5621-94

(Test Method)

Standard Test Method for Sonic Shear Stability of Hydraulic Fluid

Standard Test Method for Sonic Shear Stability of Hydraulic Fluid

SCOPE
1.1 This test method covers the evaluation of the shear stability of a hydraulic fluid in terms of the final viscosity that results from irradiating a sample of the hydraulic fluid in a sonic oscillator.  
1.2 Evidence has been presented that a good correlation exists between the shear degradation that results from sonic oscillation and that obtained in a vane pump test procedure.  
1.3  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.  
1.4 This test method uses millimetres squared per second (mm ²/s), an SI unit, as the unit of viscosity. For information, the equivalent unit, cSt, is shown in parentheses.

General Information

Status
Historical
Publication Date
09-Aug-2001
ICS
75.120 - Hydraulic fluids
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.07 - Flow Properties
Current Stage
Ref Project

Relations

Replaced By
ASTM D5621-01 - Standard Test Method for Sonic Shear Stability of Hydraulic Fluid
Effective Date
10-Aug-2001

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ASTM D5621-94 - Standard Test Method for Sonic Shear Stability of Hydraulic FluidASTM D5621-94 - Standard Test Method for Sonic Shear Stability of Hydraulic Fluid
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ASTM D5621-94 - Standard Test Method for Sonic Shear Stability of Hydraulic Fluid
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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: D 5621 – 94 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
1
Sonic Shear Stability of Hydraulic Fluid
This standard is issued under the fixed designation D 5621; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This test method covers the evaluation of the shear 4.1 This test method was developed using Test Method
stability of a hydraulic fluid in terms of the final viscosity that D 2803 – 91.
results from irradiating a sample of the hydraulic fluid in a 4.2 This test method permits the evaluation of shear stability
sonic oscillator. with minimum interference from thermal and oxidative factors
1.2 Evidence has been presented that a good correlation that may be present in some applications. It has been found
exists between the shear degradation that results from sonic applicable to fluids containing both readily sheared and shear-
2
oscillation and that obtained in a vane pump test procedure. resistant polymers. Correlation with performance in the case of
1.3 This standard does not purport to address all of the hydraulic applications has been established.
safety concerns, if any, associated with its use. It is the
5. Apparatus
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5.1 Sonic Shear Unit, fixed frequency oscillator and sonic
5
bility of regulatory limitations prior to use.
horn.
1.4 This test method uses millimetres squared per second
5.2 Auxiliary Equipment—To facilitate uniform perfor-
2
(mm /s), an SI unit, as the unit of viscosity. For information,
mance, the following auxiliary equipment is recommended:
the equivalent unit, cSt, is shown in parentheses.
5.2.1 Cooling Bath or Ice Bath, to maintain a jacket
temperature of 0°C.
2. Referenced Documents
5.2.2 Griffın 50 mL Beaker, borosilicate glass.
2.1 ASTM Standards: 5.2.3 Sonic-Insulated Box, to enclose the sonic horn to
D 445 Test Method for Kinematic Viscosity of Transparent reduce the ambient noise level produced by the sonic shear
and Opaque Liquids (and the Calculation of Dynamic unit.
3
5.3 Viscometer, any viscometer and bath meeting the re-
Viscosity)
D 2603 Test Method for Sonic Shear Stability of Polymer- quirements of Test Method D 445.
4
Containing Oils
6. Reference Fluids
6
3. Summary of Test Method
6.1 The reference fluid is ASTM Reference Fluid B, a
petroleum oil containing a polymer capable of being broken
3.1 A convenient volume of hydraulic fluid is irradiated in a
sonic oscillator for a period of time and the change in viscosity down by turbulence at high rates of shear. This oil has a
2
viscosity of about 13.5 mm /s (cSt) at 40°C. The viscosity of a
is determined by Test Method D 445. A standard reference fluid
containing a readily sheared polymer is run frequently to specific lot is supplied by the provider of that lot.
ensure that the equipment imparts a controlled amount of sonic
7. Calibration of Apparatus
energy to the sample.
3.2 The conditions to obtain the data for the precision 7.1 The reference fluid provides a practical way to define
statement were: 30 mL sample, 12.5 min calibration, and 40
the performance (severity level) of a sonic oscillator unit so
min sample irradiation at 0°C jacket temperature. that satisfactory comparison can be made between tests run on
different days in the same unit and between tests run with
different units.
1 7.2 The decrease in viscosity observed for a given hydraulic
This test method is under the jurisdiction of ASTM Committee D-2 on
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee fluid on irradiation in an oscillator unit depends on a number of
D02.N0.07on Lubricating Properties.
Current edition approved Oct. 15, 1994. Published December 1994.
2
Stambaugh, R. L., Kopko, R. J., and Roland, T. F., “Hydraulic Pump
5
Performance—A Basis for Fluid Viscosity Classification”, SAE Paper No. 901633. In the round robin program, equipment from Sonic Systems, Inc., 109 Pheasant
Available from Society of Automotive Engineers, 400 Commonwealth Dr., Warren- Run, Newtown, PA 18040 and Heat Systems Ultrasonic, Inc., 1938 New Highway,
dale, PA 15096. Farmingdale, NY 11735, were found to be satisfactory.
3 6
Annual Book of ASTM Standards, Vol 05.01. This fluid can be obtained from Rohm and Haas Co., Research Laboratories,
4
Annual Book of ASTM Standards, Vol 05.02. Spring House, PA 19477
...

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1.1 This test method covers the fluidity and appearance of hydraulic fluids after storage at low temperature.  
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1.2.1 Exception—There are no SI equivalents for the inch fasteners and inch O-rings that are used in the apparatus in this test method.  
1.2.2 Exception—In some cases English pressure values are given in parentheses as a safety measure.  
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5.1 This practice allows the collection of a representative sample of LPG that may contain trace volatile dissolved components such as methane, ethane, and nitrogen. Sampling by Practice D1265 can result in a small, but predictable, loss of these lighter components. Practice D1265 is suitable for collecting samples for routine specification testing, as the small loss of light components is not significant under Specification D1835 specification requirements. Practice D3700 is recommended whenever highly accurate determination of light components is required. For example, compositions determined on samples collected according to Practice D3700 may be used to establish the product value of NGL mixtures (see Appendix X1).
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1.1 This practice covers the equipment and procedures for obtaining a representative sample of liquefied petroleum gas (LPG), such as specified in ASTM Specification D1835, GPA 2140, and comparable international standards. It may also be used for other natural gas liquid (NGL) products that are normally single phase (for example, NGL mix, field butane, and so forth), defined in other industry specifications or contractual agreements, and for volatile (higher vapor pressure) crude oils.
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