ASTM D5771-02

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation: D 5771 – 02
Designation: 444/99
Standard Test Method for
Cloud Point of Petroleum Products (Optical Detection
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Stepped Cooling Method)
This standard is issued under the fixed designation D 5771; 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 using an automatic apparatus. The temperature results from
this test method have been found to be equivalent to Test Method D 2500. When specification requires
Test Method D 2500, do not substitute this test method or any other method without obtaining
comparative data and agreement from the specifier.
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1. Scope 2.2 IP Standard:
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IP219 Test Method for Cloud Point of Petroleum Products
1.1 This test method describes the determination of the
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2.3 Other Standard:
cloud point of petroleum products and biodiesel fuels that are
IEC 751 Industrial Platinum Resistance Thermometer Sen-
transparent in layers 40 mm in thickness, by an automatic
sors
instrument using an optical device.
1.2 This test method covers the range of temperatures
3. Terminology
from −40 to +49°C with temperature resolution of 0.1°C.
3.1 Definition:
1.3 The values stated in SI units are to be regarded as the
3.1.1 cloud point, n—in petroleum products and biodiesel
standard. The values given in parentheses are for information
fuels, the temperature of a liquid specimen when the smallest
only.
observable cluster of wax crystals first appears upon cooling
1.4 This standard does not purport to address all of the
under prescribed conditions.
safety concerns, if any, associated with its use. It is the
3.1.1.1 Discussion—The cloud point appears when the tem-
responsibility of the user of this standard to establish appro-
perature of the specimen is low enough to cause wax crystals
priate safety and health practices and determine the applica-
to precipitate. In homogeneous liquids, the cloud is always
bility of regulatory limitations prior to use.
noted first at the location in the specimen where the specimen
2. Referenced Documents temperature is the lowest. This is typically at the lower portion
of the test jar when using the apparatus described in Test
2.1 ASTM Standards:
Method D 2500.
D 2500 Test Method for Cloud Point of Petroleum Prod-
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3.1.2 biodiesel, n—fuel comprised of mono-alkyl esters of
ucts
long chain fatty acids derived from vegetable oils or animal
D 4057 Practice for Manual Sampling of Petroleum and
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fats, designated B 100.
Petroleum Products
3.1.2.1 Discussion—Biodiesel is typically produced by a
D 4177 Practice for Automatic Sampling of Petroleum and
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reaction of vegetable oil or animal fat with an alcohol such as
Petroleum Products
methanol or ethanol in the presence of a catalyst to yield
mono-esters and glycerin. The fuel typically may contain up to
14 different types of fatty acids that are chemically transformed
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This test method is under the jurisdiction of ASTM Committee D02 on into fatty acid methyl esters (FAME).
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.07 on Flow Properties.
Current edition approved April 10, 2002. Published July 2002. Originally
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Available from the Institute of Petroleum, 61 New Cavendish St., London,
published as D 5771–95. Last previous edition D 5771–95.
2
England WIM 8AR.
Annual Book of ASTM Standards, Vol 05.01.
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Available from International Electrotechnical Commission, P.O. 131, 3 Rue de
Annual Book of ASTM Standards, Vol 05.06.
Varembe, CH-Geneve 1211–2.0.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 5771
TABLE 1 Jacket and Specimen Cooling Temperatures
Specimen Temperature, °C Jacket Temperature, °C
ST >+10 06 0.5
+10 $ ST > − 7 −17.26 0.5
−7 $ ST > − 24 −34.2 6 0.5
−24 $ ST > − 41 −51.26 0.5
−41 $ ST > − 58 −68.26 0.5
−58 $ ST > − 75 −85.26 0.5
3.1.3 biodiesel blend, n—a blend of biodiesel fuel with to the cooling profile listed in Table 1. The specimen is
petroleum-based diesel fuel designated BXX, where XX is the continuously monitored by an optical system for the formation
volume % of biodiesel. of a crystalline structure. When the crystallization of the wax in
3.2 Definitions of Terms Specific to This Standard:
...