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GB 29743.1-2022: Motor vehicle coolant -- Part 1: Fuel vehicle engine coolant
GB 29743.1-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 03.220.20
CCS R 16
Replacing GB 29743-2013
Motor Vehicle Coolant – Part 1: Fuel Vehicle Engine Coolant
ISSUED ON: DECEMBER 29, 2022
IMPLEMENTED ON: JULY 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 8
4 Product Classification ... 8
5 Technical Requirements and Test Methods ... 10
6 inspection Rules ... 16
7 Marking, Packaging, Transportation and Storage ... 17
Appendix A (Normative) Preparation Method of Coolant Performance Test Solution
... 19
Appendix B (Normative) Technical Requirements for Metal Parts Used in Coolant Test
... 21
Appendix C (Normative) Preparation Method of Reference Liquid for Bubble
Tendency Test of Coolant ... 22
Appendix D (Normative) Test Method for Coolant Stability and Sedimentation ... 24
Appendix E (Informative) Specification and Requirements for Dilution Water of
Coolant Concentrate ... 27
Motor Vehicle Coolant – Part 1: Fuel Vehicle Engine Coolant
1 Scope
This Document specifies the product classification, technical requirements, test methods,
inspection rules, and marking, packaging, transportation and storage of fuel vehicle engine
coolants.
This Document applies to the coolant for light-duty engines and heavy-duty engines of fuel
vehicles.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 711 Hot-Rolled Quality Carbon Structural Steel Plates, Sheets and Wide Strips
GB/T 1173 Casting aluminum alloys
GB/T 3673 Phthalocyanine green G
GB/T 5231 Designation and chemical composition of wrought copper and copper alloys
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 8926 Standard test method for insoluble in used lubricating oils
GB/T 9439 Grey iron castings
JT/T 1230 Standard test method for determination of inorganic anions in motor vehicle
engine coolant - Ion chromatography
JT/T 1304 Technical specification of aluminum centrifugal pumps for cavitation corrosion
characteristics test with engine coolants
NB/SH/T 0164 Petroleum and related products packaging, storage, transportation and
acceptance of delivery rules
3 Terms and Definitions
For the purposes of this Document, the following terms and definitions apply.
3.1 Engine coolant
The functional liquid that is compounded with antifreeze, corrosion inhibitor and other raw
materials. It is used in the engine cooling system and has the functions of cooling, anti-corrosion,
anti-freezing and anti-scaling, etc.
NOTE: The engine coolant taken directly from the original product packaging is usually called the stock
solution, which can be either the engine coolant concentrate or the engine coolant predilute.
3.2 Light-duty engine
An engine that operates for a long time at a condition of lower than the rated (net) power.
3.3 Heavy-duty engine
An engine that operates for a long time at a condition of rated (net) power.
NOTE: Most heavy-duty engines adopt wet cylinder liner design.
3.4 Engine coolant concentrate
The engine coolant, of which the water content is not more than 5%, is used for the engine
cooling system after dilution.
3.5 Engine coolant predilute
The engine coolant, with a specific freezing point, is directly used in the engine cooling system.
4 Product Classification
4.1 Classification by the engine load
Fuel vehicle engine coolant (hereinafter referred to as “coolant”) is divided into light-duty
coolant and heavy-duty coolant according to the engine load. The classification, code and model
of the light-duty coolant shall comply with the provisions in Table 1. The classification, code
and model of heavy-duty coolant shall comply with the provisions in Table 2.
6.2.1 The type inspection items are all the technical requirements stipulated in Clause 5.
6.2.2 Exit-factory batch inspection items include appearance, color, smell, freezing point,
boiling point, pH, density, reserve alkalinity, and bubble tendency.
6.2.3 The exit-factory periodic inspection items include the items in 6.2.2 and ash content,
chlorine content, sulfate content, influence on automotive organic coatings, moisture, glassware
corrosion, and heat transfer corrosion of cast aluminum alloys.
6.3 Batching
Under the condition that the raw materials and processes remain unchanged, each production
of one kettle or continuous production of multiple kettles that are uniformly mixed is an
inspection batch.
6.4 Sampling
Sampling shall be carried out in accordance with the provisions of SH/T 0065; and the sampling
volume of each batch of products must meet the requirements for inspection and reserved
sample; or randomly select samples from packaged products for inspection and reserved
samples.
6.5 Judgment rules
When the results of exit-factory inspection and type inspection meet the provisions of Clause
5, it is determined that the batch of products is qualified.
6.6 Re-inspection rules
If the results of the exit-factory inspection and type inspection do not meet the requirements of
Clause 5, double-quantity samples shall be re-taken from the same batch of products to re-
inspect the unqualified items. If the re-inspection results still do not meet the requirements of
this Document, the batch of products shall be judged is unqualified.
7 Marking, Packaging, Transportation and Storage
7.1 The coolant shall be marked and packaged according to the provisions of NB/SH/T 0164,
and the content of the marking shall include:
a) product name;
b) type of antifreeze;
c) product classification and freezing point;
d) usage method of concentrate product (refer to Appendix E for the specification
Appendix D
(Normative)
Test Method for Coolant Stability and Sedimentation
D.1 Summary of method
D.1.1 Coolant stability
After keeping the coolant specimen at 60°C for 336h, observe the appearance of the specimen.
Then take a certain amount of synthetic hard water and add it to the specimen; mix well and
keep it at 90°C for 336h; observe its appearance. Then centrifuge the specimen according to the
specified requirements; and record the volume of the sediment.
D.1.2 Sedimentation of coolant
Mix the coolant specimen evenly; centrifuge the specimen under specified conditions; and
record the volume of the sediment.
D.2 Instruments and reagents
D.2.1 Oven: The temperature can be controlled at 60°C±2°C and 90°C±2°C, respectively.
D.2.2 Centrifuge: It shall meet the requirements of GB/T 8926.
D.2.3 Centrifuge tube: It shall meet the requirements of GB/T 8926, with a cork or rubber
stopper.
D.2.4 Graduated cylinder: 100mL, division value of 1mL.
D.2.5 Volumetric flask: 1000mL.
D.2.6 Water: It shall meet the requirements for Class-III water in GB/T 6682.
D.2.7 Calcium chloride dihydrate (CaCl2·2H2O): Analytically pure.
D.2.8 Methanol: Analytically pure.
D.2.9 Synthetic hard water stock solution: Weigh 44.10g of calcium chloride dihydrate
(CaCl2·2H2O) and dissolve ...