ASTM D5773-03

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An American National Standard
Designation: D 5773 – 03
Designation: 446/99
Standard Test Method for
Cloud Point of Petroleum Products (Constant Cooling Rate
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Method)
This standard is issued under the fixed designation D 5773; 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.
INTRODUCTION
This test method describes an alternative procedure for the determination of cloud point of
petroleum products Test Method D 2500/IP219 using an automatic apparatus. The temperature results
from this test method have been found to be equivalent to Test Method D 2500/IP219. When
specification requires Test Method D 2500/IP219, do not substitute this test method or any other
method without obtaining comparative data and agreement from the specifier.
1. Scope* D 4177 Practice for Automatic Sampling of Petroleum and
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Petroleum Products
1.1 This test method describes the determination of the
2.2 IP Standard:
cloud point of petroleum products and biodiesel fuels that are
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IP219 Test Method for Cloud Point of Petroleum Products
transparent in layers 40 mm in thickness by an automatic
instrument using a constant cooling rate.
3. Terminology
1.2 This test method covers the range of temperatures from
3.1 Definitions:
−60 to +49°C with temperature resolution of 0.1°C, however,
3.1.1 biodiesel, n—a fuel comprised of mono-alkyl esters of
the range of temperatures included in the 1997 interlaboratory
long-chain fatty acids derived from vegetable oils or animal
cooperative test program only covered the temperature range of
fats, designated B100.
–56 to +34°C.
3.1.1.1 Discussion—Biodiesel is typically produced by a
1.3 The values stated in SI units are to be regarded as the
reaction of vegetable oil or animal fat with an alcohol such as
standard. The values given in parentheses are for information
methanol or ethanol in the presence of a catalyst to yield
only.
mono-esters and glycerin. The fuel typically may contain up to
1.4 This standard does not purport to address all of the
14 different types of fatty acids that are chemically transformed
safety concerns, if any, associated with its use. It is the
into fatty acid methyl esters (FAME).
responsibility of the user of this standard to establish appro-
3.1.2 biodiesel blend, n—a blend of biodiesel fuel with
priate safety and health practices and determine the applica-
petroleum-based diesel fuel designated BXX, where XX is the
bility of regulatory limitations prior to use.
volume percentage of biodiesel.
2. Referenced Documents 3.1.3 cloud point, n—in petroleum products and biodiesel
fuels, the temperature of a liquid specimen when a wax crystal
2.1 ASTM Standards:
structure that is similar in appearance to a cloud is formed upon
D 2500 Test Method for Cloud Point of Petroleum Prod-
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cooling under prescribed conditions.
ucts
3.1.3.1 Discussion—The cloud point appears when the tem-
D 4057 Practice for Manual Sampling of Petroleum and
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perature of the specimen is low enough to cause wax crystals
Petroleum Products
to precipitate. In a homogeneous liquid, the cloud is always
noted first at the location in the specimen where the specimen
temperature is the lowest. This is typically at the lower portion
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This test method is under the jurisdiction of ASTM Committee D02 on
of the test jar when using the apparatus described in Test
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
Method D 2500.
D02.07 on Flow Properties.
Current edition approved July 10, 2003. Published August 2003. Originally
approved in 1995. Last previous edition approved in 2002 as D 5773–02.
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Annual Book of ASTM Standards, Vol 05.01. Available from the Institute of Petroleum, 61 New Cavendish Street, London,
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Annual Book of ASTM Standards, Vol 05.02. England WIM 8AR.
*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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D5773–03
3.2 Definitions of Terms Specific to This Standard: 5.6 This test method eliminates most of the operator time
3.2.1 automatic cloud point, n—the temperature of a speci- required of Test Method D 2500.
men, when the appearance of the cloud is determined under the 5.7 This test method does not require the use of a mechani-
conditions of this test method. cal refrigeration apparatus.
3.2.1.1 Discussion—The cloud point in this test method is
NOTE 3—In certain cases of high ambient temperature, a source of
determined by an automatic instrument using an optical device
cooling
...