ASTM D5771-21

Standard Test Method for Cloud Point of Petroleum Products and Liquid Fuels (Optical Detection Stepped Cooling Method)

SIGNIFICANCE AND USE
5.1 For petroleum products and biodiesel fuels, the cloud point is an index of the lowest temperature of their utility for certain applications. Wax crystals of sufficient quantity can plug filters used in some fuel systems.  
5.2 Petroleum blending operations require precise measurement of the cloud point.  
5.3 This test method can determine the temperature of the test specimen at which wax crystals have formed sufficiently to be observed as a cloud with a resolution of 0.1 °C.  
5.4 This test method provides results that, when rounded to the next lower integer, are equivalent to Test Method D2500. Refer to 12.2.  
5.5 This test method is more precise than Test Method D2500.
Note 1: According to interlaboratory examination, the reproducibility of this test method has been found to be more precise than Test Method D2500.
SCOPE
1.1 This test method covers the description of the determination of the cloud point of petroleum products and biodiesel fuels that are transparent in layers 40 mm in thickness, by an automatic instrument using an optical device.  
1.2 This test method covers the range of temperatures from −60 °C to +49 °C with temperature resolution of 0.1 °C, however, the range of temperatures included in the 1997 interlaboratory cooperative test program only covered the temperature range of –56 °C to +34 °C.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Dec-2020
• ICS: 75.160.20 - Liquid fuels
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.07 - Flow Properties

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5771 −21
Designation: IP 444⁄09
Standard Test Method for
Cloud Point of Petroleum Products and Liquid Fuels
1
(Optical Detection 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 (´) 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 productsTest Method D2500/IP219 using an automatic apparatus.The temperature results
from this test method have been found to be equivalent to Test Method D2500/IP 219. When
specification requires Test Method D2500/IP 219, do not substitute this test method or any other
method without obtaining comparative data and agreement from the specifier.
1. Scope* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This test method covers the description of the determi-
D2500Test Method for Cloud Point of Petroleum Products
nation of the cloud point of petroleum products and biodiesel
and Liquid Fuels
fuels that are transparent in layers 40 mm in thickness, by an
D4057Practice for Manual Sampling of Petroleum and
automatic instrument using an optical device.
Petroleum Products
1.2 This test method covers the range of temperatures
D4177Practice for Automatic Sampling of Petroleum and
from−60°C to+49°C with temperature resolution of 0.1°C,
Petroleum Products
however, the range of temperatures included in the 1997
D6708Practice for StatisticalAssessment and Improvement
interlaboratory cooperative test program only covered the
of Expected Agreement Between Two Test Methods that
temperature range of –56°C to +34°C.
Purport to Measure the Same Property of a Material
D6751Specification for Biodiesel Fuel Blend Stock (B100)
1.3 The values stated in SI units are to be regarded as
for Middle Distillate Fuels
standard. No other units of measurement are included in this
3
standard.
2.2 Energy Institute Standard:
3
IP219Test Method for Cloud Point of Petroleum Products
1.4 This standard does not purport to address all of the
4
2.3 Other Standard:
safety concerns, if any, associated with its use. It is the
IEC 751Industrial Platinum Resistance Thermometer Sen-
responsibility of the user of this standard to establish appro-
sors
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
3. Terminology
1.5 This international standard was developed in accor-
3.1 Definitions:
dance with internationally recognized principles on standard-
3.1.1 biodiesel, n—fuel comprised of mono-alkyl esters of
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- long chain fatty acids derived from vegetable oils or animal
fats, designated B100.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
1
This test method is under the jurisdiction of ASTM Committee D02 on Standards volume information, refer to the standard’s Document Summary page on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of the ASTM website.
3
Subcommittee D02.07 on Flow Properties. Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR,
Current edition approved Jan. 1, 2021. Published January 2021. Originally U.K., http://www.energyinst.org.uk.
4
approved in 1995. Last previous edition approved in 2020 as D5771–20. DOI: Available from International Electrotechnical Commission (IEC), 3 rue de
10.1520/D5771-21. Varembé, Case postale 131, CH-1211, Geneva 20, Switzerland, http://www.iec.ch.
*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

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D5771 − 21
3.1.1.1 Discussion—Biodiesel is typically produced by a scribed in 4.1, the specimen receptacle is described in Section
reaction of vegetable oil or animal fat with an alcohol such as 6, and the optical system for the detection of crystal formation
methanol or ethanol in the presence of a catalyst to yield is described in Section 6.
mono-alkylestersandglycerin,whichisremoved.Thefinished
3.2.3 D2500/IP 219 equivalent cloud point, n—thetempera-
biodiesel d
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5771 − 20 D5771 − 21
Designation: IP 444 ⁄09
Standard Test Method for
Cloud Point of Petroleum Products and Liquid Fuels
1
(Optical Detection 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. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) 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/IP 219 using an automatic apparatus. The temperature results
from this test method have been found to be equivalent to Test Method D2500/IP 219. When
specification requires Test Method D2500/IP 219, do not substitute this test method or any other
method without obtaining comparative data and agreement from the specifier.
1. Scope*
1.1 This test method covers the description of the determination of the cloud point of petroleum products and biodiesel fuels that
are transparent in layers 40 mm in thickness, by an automatic instrument using an optical device.
1.2 This test method covers the range of temperatures from −60 °C to +49 °C with temperature resolution of 0.1 °C, however, the
range of temperatures included in the 1997 interlaboratory cooperative test program only covered the temperature range of –56 °C
to +34 °C.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D2500 Test Method for Cloud Point of Petroleum Products and Liquid Fuels
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.07 on Flow Properties.
Current edition approved June 1, 2020Jan. 1, 2021. Published June 2020January 2021. Originally approved in 1995. Last previous edition approved in 20172020 as
D5771 – 17.D5771 – 20. DOI: 10.1520/D5771-20.10.1520/D5771-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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 − 21
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D6708 Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport
to Measure the Same Property of a Material
D6751 Specification for Biodiesel Fuel Blend Stock (B100) for Middle Distillate Fuels
3
2.2 Energy Institute Standard:
3
IP 219 Test Method for Cloud Point of Petroleum Products
4
2.3 Other Standard:
IEC 751 Industrial Platinum Resistance Thermometer Sensors
3. Terminology
3.1 Definitions:
3.1.1 biodiesel, n—fuel comprised of mono-alkyl esters of long chain fatty acids derived from vegetable oils or animal fats,
designated B100.
3.1.1.1 Discussion—
Biodiesel is typically produced by a reaction of vegetable oil or animal fat with an alcohol such as methanol or ethanol in the
presence of a catalyst to yield mono-alkyl esters and glycerin, which is removed. The finished biodiesel derives approximately
10 % of its mass from the reacted alcohol. The alcohol used in the reaction may or may not come from renewable resources.
3.1.2 biodiesel blend, blend (BXX), n—blend of biodiesel fuel with diesel fuels and fuel oils.a homogeneous mixture of
hydrocar
...