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Motor vehicle coolant - Part 3: Fuel cell vehicle coolant
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GB 29743.3-2025
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Basic data | Standard ID | GB 29743.3-2025 (GB29743.3-2025) | | Description (Translated English) | Motor vehicle coolant - Part 3: Fuel cell vehicle coolant | | Sector / Industry | National Standard | | Classification of Chinese Standard | R16 | | Classification of International Standard | 03.220.20 | | Word Count Estimation | 26,215 | | Date of Issue | 2025-08-29 | | Date of Implementation | 2026-03-01 | | Issuing agency(ies) | State Administration for Market Regulation; Standardization Administration of China | GB 29743.3-2025: Motor vehicle coolant - Part 3: Fuel cell vehicle coolant---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB29743.3-2025
ICS 03.220.20
CCSR16
National Standards of the People's Republic of China
Motor vehicle coolant
Part 3.Coolant for Fuel Cell Vehicles
Published on 2025-08-29
Implemented on 2026-03-01
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of Contents
Preface III
Introduction IV
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4 Product Categories 2
5.Technical Requirements and Test Methods 2
6 Inspection Rules 5
7.Marking, Packaging, Transport and Storage 6.
Appendix A (Normative) Test Method for Conductivity of Gasoline Coolant 7
Appendix B (Normative) Test Methods for Thermodynamic Parameters of Gasoline Coolant 8
Appendix C (Normative) Static Corrosion Test Method for Gas-Fired Electric Coolant 10
Appendix D (Normative) Test Method for Corrosion of Gasoline Coolant Circulation Bench 14
Appendix E (Normative) Test Methods for Compatibility of Gasoline Coolant and Plastic Materials 18
Appendix F (Normative) Test Methods for Stability of Gasoline Coolant 19
Appendix G (Normative) Test Method for Compatibility between Gasoline Coolant and Deionizer 20
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document is Part 3 of GB 29743 "Motor Vehicle Coolant". GB 29743 has the following parts published.
---Part 1.Coolant for Gasoline Vehicle Engines;
---Part 2.Electric Vehicle Coolant;
---Part 3.Coolant for Fuel Cell Vehicles
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed and is under the jurisdiction of the Ministry of Transport of the People's Republic of China.
introduction
Coolant is an essential heat transfer medium for the safe operation of motor vehicles. By circulating within the vehicle's cooling system, coolant plays a crucial role in...
Coolant functions to dissipate heat, prevent freezing, and prevent corrosion, thereby ensuring the normal power output of the core power components of a motor vehicle. Given the importance of coolant products and...
Due to its unique characteristics, both domestic and international standardization organizations generally attach great importance to the establishment of coolant standards and specifications. GB 29743 "Motor Vehicle Coolant" aims to establish applicable standards and specifications.
The technical requirements for coolant in different types of motor vehicles are proposed to consist of three parts.
---Part 1.Coolant for Gasoline-Powered Vehicle Engines. The purpose is to specify the technical requirements applicable to coolants for gasoline-powered vehicle engines.
---Part 2.Electric Vehicle Coolant. The purpose is to specify the technical requirements applicable to coolants for electric vehicle power batteries.
---Part 3.Coolant for Fuel Cell Vehicles. The purpose is to specify the technical requirements applicable to coolant for fuel cell vehicle stacks.
Motor vehicle coolant
Part 3.Coolant for Fuel Cell Vehicles
1.Scope
This document specifies the product classification, technical requirements and test methods, inspection rules, marking, packaging, and transportation of coolants for fuel cell vehicles.
Transportation and storage.
This document applies to fuel cells in fuel cell vehicle stack thermal management systems that are formulated with ethylene glycol as the primary antifreeze.
Production, inspection, and use of automotive coolant.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 3190 Chemical composition of wrought aluminum and aluminum alloys
GB/T 3620.1 Grades and Chemical Compositions of Titanium and Titanium Alloys
GB/T 5231 Grades and Chemical Compositions of Processed Copper and Copper Alloys
GB/T 6682-2008 Specifications and test methods for water used in analytical laboratories
GB/T 15115 Die-cast aluminum alloys
GB/T 20878 Stainless Steel Grades and Chemical Composition
GB 29743.2-2025 Motor vehicle coolants – Part 2.Electric vehicle coolants
GB/T 39937-2021 Requirements and Test Methods for Polypropylene (PP) Extruded Sheets for Plastic Products
GB/T 40169-2021 Molded Sheets of Ultra-High Molecular Weight Polyethylene (PE-UHMW) and High-Density Polyethylene (PE-HD)
JT/T 1230 Determination of Inorganic Anions in Motor Vehicle Engine Coolant by Ion Chromatography
NB/SH/T 0164 Rules for Packaging, Storage, Transportation and Delivery Acceptance of Petroleum and Related Products
NB/SH/T 0828 Determination of Silicon and Other Elements Content in Engine Coolant by Inductively Coupled Plasma Atomic Emission Spectrometry
SH/T 0065 Sampling of test samples for engine coolant or rust inhibitor and preparation of aqueous solutions
SH/T 0066 Determination of Foaming Tendency in Engine Coolant (Glassware Method)
SH/T 0067 Determination of Ash Content in Engine Coolant and Rust Inhibitor
SH/T 0068 Engine coolant and its concentrate – Determination of density or relative density (hydrometer method)
SH/T 0069 Determination of pH value of engine antifreeze, rust inhibitor and coolant
SH/T 0084 Test methods for the effects of cooling system chemical solutions on organic coatings on automobiles
SH/T 0086 Determination of water content in engine coolant concentrate (Karl Fischer method)
SH/T 0089 Determination of Boiling Point of Engine Coolant
SH/T 0090 Determination of Freezing Point of Engine Coolant
SH/T 0604 Determination of density of crude oil and petroleum products (U-tube method)
3.Terms and Definitions
The following terms and definitions apply to this document.
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