GB 12981-2012 in English

《GB 12981-2012机动车辆制动液》由624（国家能源局）归口。

1 Scope

This Standard specifies the requirements, test methods, inspection rules, marking, packing, transport and storage of nonpetroleum base brake fluid of hydraulic braking and hydraulic clutch system for motor vehicle.
This Standard is applicable to the motor vehicle brake fluids which are contacted with the sealing element made of styrene butadiene rubber (SBR) or ethylene propylene diene monomer (EPDM) and are added diversified additives and whose foundation fluid is nonpetroleum base raw material.
This standard is not applicable to the motor vehicle brake fluids used under the environmental conditions of polar region.

2 Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

Content
Foreword I
1 Scope
2 Normative References
3 Product Varieties and Mark
3.1 Product Varieties
3.2 Product Marks
4 Requirements and Test Method
5 Inspection Rules
5.1 Inspection types and test items
5.2 Batching
5.3 Sampling
5.4 Determination rules
5.5 Retest rules
6 Mark, Package, Transport and Storage
Appendix A (Informative) Comparison List of the Chapter and Article Numbers between this Standard and ISO 4925:
Appendix B (Informative) List of Technical Differences and the Causes between this Standard and ISO 4925:
Appendix C (Normative) Determination Method for Wet Equilibrium Reflux Boiling Point of Brake Fluid
Appendix D (Normative) Determination Method for Ph Value of Brake Fluid
Appendix E (Normative) Test Method for the Fluid Stability of Brake Fluid
Appendix F (Normative) Test Method of Metal Lamination Corrosion of Brake Fluid
Appendix G (Normative) Low Temperature Flowability and Appearance Inspection Method of Brake Fluids
Appendix H (Normative) Test Method of Evaporation Loss of Brake Fluids
Appendix I (Normative) Test Method of Containing Water Ability and Compatibility of Brake Fluids
Appendix J (Normative) Test Method of Anti-Oxygen Property of Brake Fluids
Appendix K (Normative) Test Method of Rubber Adaptability of Brake Fluids
Appendix L (Informative) Simulation Test Method of Brake Fluid Travel
Appendix M (informative) Test Method of Anti-Rust Property of Brake Fluids