ASTM D6351-99

Standard Test Method for Determination of Low Temperature Fluidity and Appearance of Hydraulic Fluids

SCOPE
1.1 This test method covers the fluidity and appearance of hydraulic fluids after storage at low temperature.
1.2 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 hazard statements, see Section 6.

General Information

• Status: Historical
• Publication Date: 09-Jun-1999
• ICS: 75.120 - Hydraulic fluids
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.N0 - Hydraulic Fluids

Relations

• Replaced By: ASTM D6351-99(2005) - Standard Test Method for Determination of Low Temperature Fluidity and Appearance of Hydraulic Fluids
• Effective Date: 01-May-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation:D6351–99
Standard Test Method for
Determination of Low Temperature Fluidity and Appearance
of Hydraulic Fluids
This standard is issued under the fixed designation D 6351; 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 4.2 This test method is not intended to indicate cold
temperature pumpability performance. A separate assessment
1.1 This test method covers the fluidity and appearance of
of viscometric performance should be made in order to assess
hydraulic fluids after storage at low temperature.
cold flow properties, which are important in order to avoid
1.2 This standard does not purport to address all of the
system damage in cold temperature applications. Suitable
safety concerns, if any, associated with its use. It is the
guidelines for such testing and test temperatures for various
responsibility of the user of this standard to establish appro-
viscosity grades can be found in Practice D 6080.
priate safety and health practices and determine the applica-
4.3 No specific temperature of measurement is given in this
bility of regulatory limitations prior to use. For specific hazard
test method because fluids with different viscosity grades have
statements, see Section 6.
different cold temperature performance expectations. For guid-
2. Referenced Documents
ance on temperature selection relative to an intended low
temperature viscosity grade or ISO VG, consult Practice
2.1 ASTM Standards:
D 6080. As an example of using Practice D 6080, a L22
D 97 Test Method for Pour Point of Petroleum Products
viscosity grade would be evaluated at the lowest temperature
D 2500 Test Method for Cloud Point of Petroleum Products
for that grade, namely -22.9°C. Alternatively, a fluid can be
D 6080 Practice for Defining the Viscosity Characteristics
evaluated at the lowest temperature expected for field service.
of Hydraulic Fluids
E 1 Specification forASTM Liquid-in-Glass Thermometers
5. Apparatus
3. Summary of Test Method 5.1 Test Jar, cylindrical, of clear glass, flat bottom, 115 to
125 mm in height. The inside diameter of the jar can range
3.1 After preliminary drying to remove trace amounts of
from 30.0 to 32.4 mm, with a wall thickness of 1.6 mm
water, the sample is cooled to a specified temperature. After
maximum. The jar shall have a line to indicate a sample height
seven consecutive days, the sample is examined for its ability
54 6 3 mm above the inside bottom.
to flow and observed for homogeneity.
5.2 Thermometers, having ranges shown below and con-
4. Significance and Use
forming to the requirements prescribed in Specification E 1.
Thermometer Temperature Thermometer Number
4.1 The temperature at which a lubricant remains fluid and
Range
homogeneous after seven days is an index of its ability to
withstand prolonged exposure to cold temperature. With veg-
ASTM IP
etable oils and some synthetic esters, it is necessary to do
High cloud and pour -38 to +50°C 5C 1C
extended cold storage testing. Quick cool, short-term tests,
Low cloud and pour -80 to +20°C 6C 2C
such as Test Methods D 97 and D 2500, do not adequately
Melting Point +32 to 127°C 61C 63C
predict the tendency to solidify over longer time spans at cold
5.2.1 Since separation of liquid column thermometers occa-
temperatures.
sionally occurs, thermometers should be checked visually
immediately prior to the test.
1 5.3 Cork, to fit the test jar.
This guide is under the jurisdiction of ASTM Committee D-02 on Petroleum
Products and Lubricants and is the direct responsibility of Subcommittee D02.NO 5.4 Bath, either an air or liquid bath maintained at the
on Hydraulic Fluids.
prescribed temperature with a firm support to hold the sample
Current edition approved June 10, 1999. Published August 1999.
jarsvertical.Therequiredbathtemperatureshallbemaintained
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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