ASTM D7518-20

Standard Specification for 1,3 Propanediol (PDO) Base Engine Coolant for Automobile and Light-Duty Service

ABSTRACT
This specification covers the requirements for propanediol base engine coolant used in automobiles or other light-duty service cooling systems. Engine coolant concentrates or prediluted propanediol base engine coolant shall be formulated with propanediol, water, suitable corrosion inhibitors, dye, and a foam suppressor. The coolants shall conform to the general requirements for color and effect on nonmetals. Coolants shall be formulated using water that meets the requirements for the following properties: chlorides, sulfate, hardness, ph, and iron. Glycol-base coolant concentrates and prediluted coolants shall conform to the following physical and chemical requirements for each coolant type: relative density, freezing point, boiling point, ash content, pH, chloride, water mass, reserve alkalinity, and effects on automobile finish. All coolant concentrates and prediluted coolants shall conform to the performance requirements such as corrrosion in glassware, simulated service test, corrosion of cast aluminum alloys at heat-rejecting surfaces, foaming, and cavitation-erosion.
SCOPE
1.1 This specification covers the requirements for 1,3 propanediol base engine coolants used in automobiles or other light-duty service cooling systems. When concentrates are used at 40 % to 70 % concentration by volume in water, or when prediluted glycol base engine coolants (50 volume % minimum) are used without further dilution, they will function effectively to provide protection against freezing, boiling, and corrosion.  
1.2 The coolants governed by this specification are categorized as follows:    
Coolant Type  
Description  
I  
1,3 Propanediol base concentrate  
II  
1,3 Propanediol predilute (50 vol %)
Note 1: This specification is based on the knowledge of the performance of engine coolants prepared from new or virgin ingredients.
Note 2: This specification applies to automobiles and light-duty service. A specification for heavy-duty engine service is under development.  
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered 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-Mar-2020
• ICS: 71.100.45 - Refrigerants and antifreezes
• Technical Committee: D15 - Engine Coolants and Related Fluids
• Drafting Committee: D15.07 - Specifications

Relations

• Refers: ASTM D1287-11(2020) - Standard Test Method for pH of Engine Coolants and Antirusts
• Effective Date: 01-Jan-2020
• Refers: ASTM D5931-20 - Standard Test Method for Density and Relative Density of Engine Coolant Concentrates and Aqueous Engine Coolants by Digital Density Meter
• Effective Date: 15-May-2020

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:D7518 −20
Standard Specification for
1,3 Propanediol (PDO) Base Engine Coolant for Automobile
1
and Light-Duty Service
This standard is issued under the fixed designation D7518; 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.
1. Scope* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification covers the requirements for 1,3 pro-
D512Test Methods for Chloride Ion In Water
panediol base engine coolants used in automobiles or other
D516Test Method for Sulfate Ion in Water
light-dutyservicecoolingsystems.Whenconcentratesareused
D1119Test Method for Percent Ash Content of Engine
at 40% to 70 % concentration by volume in water, or when
Coolants
prediluted glycol base engine coolants (50 volume % mini-
D1120Test Method for Boiling Point of Engine Coolants
mum) are used without further dilution, they will function
D1121Test Method for ReserveAlkalinity of Engine Cool-
effectively to provide protection against freezing, boiling, and
ants and Antirusts
corrosion.
D1122Test Method for Density or Relative Density of
1.2 The coolants governed by this specification are catego-
EngineCoolantConcentratesandEngineCoolantsByThe
rized as follows:
Hydrometer
Coolant Type Description
D1123Test Methods for Water in Engine Coolant Concen-
trate by the Karl Fischer Reagent Method
I 1,3 Propanediol base concentrate
D1126Test Method for Hardness in Water
II 1,3 Propanediol predilute (50 vol %)
D1177Test Method for Freezing Point of Aqueous Engine
NOTE 1—This specification is based on the knowledge of the perfor-
Coolants
mance of engine coolants prepared from new or virgin ingredients.
D1287TestMethodforpHofEngineCoolantsandAntirusts
NOTE 2—This specification applies to automobiles and light-duty
D1293Test Methods for pH of Water
service. A specification for heavy-duty engine service is under develop-
D1384Test Method for Corrosion Test for Engine Coolants
ment.
in Glassware
1.3 The values stated in SI units are to be regarded as
D1881Test Method for Foaming Tendencies of Engine
standard. The values given in parentheses after SI units are
Coolants in Glassware
providedforinformationonlyandarenotconsideredstandard.
D1882Test Method for Effect of Cooling System Chemical
Solutions on Organic Finishes for Automotive Vehicles
1.4 This standard does not purport to address all of the
D2570TestMethodforSimulatedServiceCorrosionTesting
safety concerns, if any, associated with its use. It is the
of Engine Coolants
responsibility of the user of this standard to establish appro-
D2809Test Method for Cavitation Corrosion and Erosion-
priate safety, health, and environmental practices and deter-
Corrosion Characteristics of Aluminum Pumps With En-
mine the applicability of regulatory limitations prior to use.
gine Coolants
1.5 This international standard was developed in accor-
D3321Test Method for Use of the Refractometer for Field
dance with internationally recognized principles on standard-
Test Determination of the Freezing Point of Aqueous
ization established in the Decision on Principles for the
Engine Coolants
Development of International Standards, Guides and Recom-
D3634Test Method for Trace Chloride Ion in Engine Cool-
mendations issued by the World Trade Organization Technical
ants
Barriers to Trade (TBT) Committee.
D4327Test Method forAnions in Water by Suppressed Ion
Chromatography
1
ThisspecificationisunderthejurisdictionofASTMCommitteeD15onEngine
Coolants and Related Fluids and is the direct responsibility of Subcommittee
2
D15.07 on Specifications. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2020. Published April 2020. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
ɛ1
approved in 2009. Last previous edition approved in 2015 as D7518–10(2015) . Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/D7518–20. 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

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D7518−20
TABLE 1 General Requirements
D4340TestMethodforCorrosionofCastAluminumAlloys
in Engine Coolants Under Heat-Rejecting Conditions Property Specific Values ASTM Test Method
D4725TerminologyforEngineCoolantsandRelatedFluids Color Distinctive .
Effect on non
...

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.
´1
Designation: D7518 − 10 (Reapproved 2015) D7518 − 20
Standard Specification for
1,3 Propanediol (PDO) Base Engine Coolant for Automobile
1
and Light-Duty Service
This standard is issued under the fixed designation D7518; 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.
1
ε NOTE—Caution statement in X1.5 was changed to a Warning statement editorially in June 2015.
1. Scope*
1.1 This specification covers the requirements for 1,3 propanediol base engine coolants used in automobiles or other light-duty
service cooling systems. When concentrates are used at 4040 % to 70 % concentration by volume in water, or when prediluted
glycol base engine coolants (50 volume % minimum) are used without further dilution, they will function effectively to provide
protection against freezing, boiling, and corrosion.
1.2 The coolants governed by this specification are categorized as follows:
Coolant Type Description
I 1,3 Propanediol base concentrate
II 1,3 Propanediol predilute (50 vol %)
NOTE 1—This specification is based on the knowledge of the performance of engine coolants prepared from new or virgin ingredients.
NOTE 2—This specification applies to automobiles and light-duty service. A specification for heavy-duty engine service is under development.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.after
SI units are provided for information only and are not considered 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 safety, health, and healthenvironmental 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:
D512 Test Methods for Chloride Ion In Water
D516 Test Method for Sulfate Ion in Water
D1119 Test Method for Percent Ash Content of Engine Coolants
D1120 Test Method for Boiling Point of Engine Coolants
D1121 Test Method for Reserve Alkalinity of Engine Coolants and Antirusts
D1122 Test Method for Density or Relative Density of Engine Coolant Concentrates and Engine Coolants By The Hydrometer
D1123 Test Methods for Water in Engine Coolant Concentrate by the Karl Fischer Reagent Method
D1126 Test Method for Hardness in Water
D1177 Test Method for Freezing Point of Aqueous Engine Coolants
D1287 Test Method for pH of Engine Coolants and Antirusts
D1293 Test Methods for pH of Water
D1384 Test Method for Corrosion Test for Engine Coolants in Glassware
1
This specification is under the jurisdiction of ASTM Committee D15 on Engine Coolants and Related Fluids and is the direct responsibility of Subcommittee D15.07
on Specifications.
Current edition approved May 1, 2015April 1, 2020. Published June 2015April 2020. Originally approved in 2009. Last previous edition approved in 20102015 as
ɛ1
D7518D7518–10(2015) – 10. . DOI: 10.1520/D7518-10R15E01.10.1520/D7518–20.
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’sstandard’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 ----------------------
D7518 − 20
D1881 Test Method for Foaming Tendencies of Engine Coolants in Glassware
D1882 Test Method for Effect of Cooling System Chemical Solutions on Organic Finishes for Automotive Vehicles
D2570 Test Method for Simulated Service Corrosion Testing of Engine Coolants
D2809 Test Method for Cavitation Corrosion and Erosion-Corrosion Characteristics of Aluminum Pumps With Engine Coolants
D3321 Test Method for Use of the Refractometer for Field Test Determination of the Freezing Point of
...