ASTM D5551-95(2001)
(Test Method)Standard Test Method for Determination of the Cloud Point of Oil
Standard Test Method for Determination of the Cloud Point of Oil
SCOPE
1.1 This test method covers the determination of the cloud point of oils used in the softening and stuffing of leather and in the manufacture of fat liquors and other softening and stuffing compounds. This test method was derived from Test Methods D97 and D2500.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
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Designation:D5551–95 (Reapproved 2001)
Standard Test Method for
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Determination of the Cloud Point of Oil
This standard is issued under the fixed designation D5551; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the determination of the cloud
pointofoilsusedinthesofteningandstuffingofleatherandin
the manufacture of fat liquors and other softening and stuffing
compounds. This test method was derived from Test Methods
D97 and D2500.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
only.
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 appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
2
D97 Test Methods for Pour Point of Petroleum Oils
2
D2500 Test Method for Cloud Point of Petroleum Oils
3
E1 Specification for ASTM Thermometers NOTE 1—All dimensions in millimetres.
FIG. 1 Apparatus for Cloud Point Test
3. Terminology
3.1 cloud point—that temperature, expressed as a multiple
of 1°C (2°F), at which a cloud or haze of wax crystals appears
indicate sample height the jar should be marked with a line 54
at the bottom of the test jar when the oil is cooled under
6 3 mm above the inside bottom.
prescribed conditions.
5.2 Thermometers, having ranges shown below and con-
formingtotherequirementsprescribedinSpecificationE1for
4. Significance and Use
thermometers:
4.1 This test method is intended to determine the cloud
Thermometer
point of oils used in the softening and stuffing of leather, as
Temperature Number
Thermometer Range ASTM IP
well as those used in the manufacture of products for such
High cloud and pour −38 to +50°C 5C 1C
purpose.Thecloudpointofoilsismeasuredforthepurposeof
Low cloud and pour −80 to +20°C 6C 2C
quality assurance. Melting point +32 to +127°C 61C 63C
5.2.1 Since separation of liquid column thermometers occa-
5. Apparatus
sionally occurs and may escape detection, thermometers
5.1 Test Jar, clear cylindrical glass, flat bottom, 30- to
should be checked immediately prior to the test and used only
33.5-mm inside diameter, and 115- to 125-mm height. To
if they prove accurate within 6 1°C (for example, ice point).
5.3 Cork, to fit the test jar, bored centrally for the test
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ThistestmethodisunderthejurisdictionofASTMCommitteeD31onLeather
thermometer.
and is the direct responsibility of Subcommittee D31.08 on Fats and Oils. This test
5.4 Jacket, metal or glass, watertight, cylindrical, flat bot-
method was developed in cooperation with the American Leather Chemists Assn.
tom, 115 mm in depth, 42- to 50-mm inside diameter. It must
(Method H18-1957).
Current edition approved May 15, 1995. Published July 1995. Originally be supported firmly in a vertical position in the cooling bath of
published as D5551–94. Last previous edition D5551–94.
5.7 so that not more than 25 mm projects out of the cooling
2
Annual Book of ASTM Standards, Vol 05.01.
medium.
3
Annual Book of ASTM Standards, Vol 14.03.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D5551
NOTE 2—Since separation of the mercury or toluene thread of cloud
5.5 Disk, cork or felt, 6 mm thick, to fit loosely inside the
and pour thermometers occasionally occurs, and since such separation
jacket.
may otherwise escape immediate detection, it is suggested that the ice
5.6 Gasket, to fit snugly around the outside of the test jar
points of the thermometers be checked immediately prior to the test.Any
and loosely inside the jacket. The gasket may be made of
thermometer that shows as ice point differing from 0°C (32°F) by more
rubber, leather, or other material that is elastic enough to cling
than1°C(2°F)shouldbefurtherexaminedorrecalibrated,orboth,before
to the test jar and hard enough to hold its shape. Its purpose is
use.
to prevent the test jar from touching the jacket.
7.4 Place the disk in the bottom of the jacket. Place the ring
5.7 Bath or Baths, maintained at prescribed temperatures
gasket around the test jar, 25 mm (1 in.) from the bottom. The
with a firm support to hold the jacket vertical. The required
disk, gasket, and inside of the jacket shall be clean and dry.
bath temperatures may be obtained by refrigeration if avail-
Insert the test jar in the jacket.
able, otherwise by suitable
...
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