ASTM D5771-04

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D5771–04
Designation: 444/99
Standard Test Method for
Cloud Point of Petroleum Products (Optical Detection
1
Stepped Cooling Method)
This standard is issued under the fixed designation D5771; 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.
INTRODUCTION
This test method describes an alternative procedure for the determination of cloud point of
petroleum products Test Method D2500 using an automatic apparatus. The temperature results from
thistestmethodhavebeenfoundtobeequivalenttoTestMethodD2500.Whenspecificationrequires
Test Method D2500, do not substitute this test method or any other method without obtaining
comparative data and agreement from the specifier.
1. Scope* D4177 Practice for Automatic Sampling of Petroleum and
Petroleum Products
1.1 This test method describes the determination of the
3
2.2 Energy Institute Standard:
cloud point of petroleum products and biodiesel fuels that are
3
IP219 TestMethodforCloudPointofPetroleumProducts
transparent in layers 40 mm in thickness, by an automatic
4
2.3 Other Standard:
instrument using an optical device.
IEC 751 Industrial Platinum Resistance Thermometer Sen-
1.2 This test method covers the range of temperatures
sors
from−60 to+49°C with temperature resolution of 0.1°C,
however, the range of temperatures included in the 1997
3. Terminology
interlaboratory cooperative test program only covered the
3.1 Definitions:
temperature range of –56 to +34°C.
3.1.1 biodiesel, n—fuel comprised of mono-alkyl esters of
1.3 The values stated in SI units are to be regarded as the
long chain fatty acids derived from vegetable oils or animal
standard. The values given in parentheses are for information
fats, designated B100.
only.
3.1.1.1 Discussion—Biodiesel is typically produced by a
1.4 This standard does not purport to address all of the
reaction of vegetable oil or animal fat with an alcohol such as
safety concerns, if any, associated with its use. It is the
methanol or ethanol in the presence of a catalyst to yield
responsibility of the user of this standard to establish appro-
mono-estersandglycerin.Thefueltypicallymaycontainupto
priate safety and health practices and determine the applica-
14differenttypesoffattyacidsthatarechemicallytransformed
bility of regulatory limitations prior to use.
into fatty acid methyl esters (FAME).
2. Referenced Documents 3.1.2 biodiesel blend, n—a blend of biodiesel fuel with
2
petroleum-based diesel fuel designated BXX, where XX is the
2.1 ASTM Standards:
volume % of biodiesel.
D2500 TestMethodforCloudPointofPetroleumProducts
3.1.3 cloud point, n—in petroleum products and biodiesel
D4057 Practice for Manual Sampling of Petroleum and
fuels, the temperature of a liquid specimen when the smallest
Petroleum Products
observable cluster of hydrocarbon crystals first occurs upon
cooling under prescribed conditions.
1
This test method is under the jurisdiction of ASTM Committee D02 on 3.1.3.1 Discussion—The cloud point occurs when the tem-
PetroleumProductsandLubricantsandisthedirectresponsibilityofSubcommittee
perature of the specimen is low enough to cause hydrocarbon
D02.07 on Flow Properties.
Current edition approved April 1, 2004. Published April 2004. Originally
approved in 1995. Last previous edition approved in 2003 as D5771–03.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from the Energy Institute, 61 New Cavendish St., London, England
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM WIG 7AR, U.K.
4
Standards volume information, refer to the standard’s Document Summary page on Available from International Electrotechnical Commission, P.O. 131, 3 Rue de
the ASTM website. Varembe, CH-Geneve 1211–2.0.
*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.
1

---------------------- Page: 1 ----------------------
D5771–04
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
crystals to precipitate. In a homogeneous liquid, the cloud is 4. Summary of Test Method
always noted first at the location in the specimen where the
4.1 After insertion of the specimen into the apparatus, and
specimen temperature is the lowest. The cloud point is the
the initiation of the program, the specimen is cooled according
temperatureatwhi
...