GB 12981-2012 PDF English
US$145.00 · In stock · Download in 9 secondsGB 12981-2012: Motor vehicle brake fluids Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB 12981: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 12981-2012 | English | 145 |
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Motor vehicle brake fluids
| Valid |
| GB 12981-2003 | English | RFQ |
ASK
|
9 days
|
Motor vehicle brake fluids
| Obsolete |
| GB 12981-1991 | English | RFQ |
ASK
|
6 days
|
Synthetic brake fluid HZY2, HZY3, HZY4
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB 12981-2012
GB 12981-2012: Motor vehicle brake fluids---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/GB12981-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 75.120
E 39
Replacing GB 12981-2003
Motor vehicle brake fluids
(ISO 4925.2005, Road vehicles - Specification of non-petroleum-base brake
fluids for hydraulic systems, MOD)
Issued on. MAY 11, 2012
Implemented on. OCTOBER 1, 2012
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 4
1 Scope... 6
2 Normative references... 6
3 Product variety and markings... 7
4 Requirements and test methods... 8
5 Inspection rules... 10
6 Marking, packaging, transportation and storage... 12
Annex A (informative) Comparison table of clause numbers of this Standard
and ISO 4925.2005... 13
Annex B (informative) Technical differences between this Standard and ISO
4925.2005 and their causes... 15
Annex C (normative) Determination method for wet equilibrium reflux boiling
point of brake fluids... 17
Annex D (normative) Determination method for pH value of brake fluids... 20
Annex E (normative) Test method for liquid stability of brake fluids... 22
Annex F (normative) Metal strip corrosion test of brake fluids... 25
Annex G (normative) Low temperature fluidity and appearance inspection
method of brake fluids... 32
Annex H (normative) Test method for evaporation loss of brake fluids... 34
Annex I (normative) Test method for water tolerance and compatibility of brake
fluids... 38
Annex J (normative) Test method for oxidation resistance of brake fluids... 41
Annex K (normative) Test method for rubber adaptability of brake fluids... 44
Annex L (informative) Stroke simulation test method for brake fluids... 47
Annex M (informative) Test method for rust resistance of brake fluid... 54
Foreword
Table 1 of Clause 4 in this Standard is mandatory (except for the test method), the rest
is recommended.
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB 12981-2003 “Motor vehicle brake fluids”; compared with
GB 12981-2003, main technical changes are as follows.
- ADD the content of warnings involving the use safety in this Standard;
- CHANGE Clause 1 “Scope” of this Standard;
- DELETE “Terms and definitions” in this Standard; MODIFY the heading of Clause
3 TO “Product classification and marking”, the corresponding contents are
modified, too;
- DELETE silicone brake fluids in Clause 3 of this Standard, that is, HZY5 contains
only products corresponding to the international general DOT5.1; ADD HZY6
corresponding to class6 in ISO 4925.2005; ADD the content related to product
markings;
- The requirements and test methods in Clause 4 are listed in Table 1 and Table 2
respectively; in Table 1, the determination of pH value refers to the method in
Annex D, not GB/T 7304; at the same time add Annex D “Determination method
for pH value of brake fluids”;
- In Table 1 of Clause 4, DELETE the hiding power figure used in the low-
temperature fluidity and appearance, water tolerance and fluid compatibility items;
in the rubber adaptation item, DELETE the test at 70 °C; ADD determination of
volume increment of SBR cup;
- In Table 2 of Clause 4, ADD the rust resistance item; MODIFY the stroke simulation
test item TO the recommend item;
- In Annex F, the formula for calculating the hardness change of the rubber cup is
changed from ΔH = H2 - H1 to ΔH = H1 - H2;
- ADD Test Method B in Annex H;
- MODIFY the name of Annex I TO. test method for water tolerance and compatibility
brake fluids; USE compatibility fluid’s national standard sample in the compatibility
test.
This Standard uses the re-drafting method to amend and adopt ISO 4925.2005 “Road
vehicles - Specification of non-petroleum-base brake fluids for hydraulic systems”
(English version).
Compared with ISO 4925.2005, this Standard has more structural adjustments; a
comparison table of clause numbers of this Standard and ISO 4925.2005 is listed in
Annex A.
There are technical differences between this Standard and ISO 4925.2005; a table of
corresponding technical differences and their causes are given in Annex B.
This Standard is proposed by National Technical Committee on Petroleum Products
and Lubricants of Standardization Administration of China (SAC/TC 280).
This Standard is under the jurisdiction of Sub-technical Committee on Synthetic Oil of
National Technical Committee on Petroleum Products and Lubricants of
Standardization Administration of China (SAC/TC 280/SC 5).
Responsible drafting organizations of this Standard. China Petroleum & Chemical
Corporation Lubricants Chongqing Branch, Ministry of Communications Highway
Science Research Institute, China Standardization Association Automotive
Maintenance Products Technology Promotion Committee, Technology Center of China
FAW Group, Technology Research Institute of Dongfeng Motor Co., Fujian Laike
Lubricating Oil Co., Ltd., Liaoning Rundi Fine Chemical Co., Ltd., PLA General
Logistics Department Oil Research Institute, Zhejiang University Fangyuan Chemical
Co., Ltd., Wuxi Petrochina Lubricating Grease Co., Ltd.
Participating drafting organizations of this Standard. China FAW Group Tianjin
Automobile Co., Shanghai Volkswagen Automobile Co., PLA General Logistics
Department Military Transportation Research Institute, Zhangjiagang TEEC
Automotive Chemicals Co., Ltd., Zhejiang University Fine Chemical Co., Ltd., Jiangyin
Yida Chemical Co., Ltd.
Main drafters of this Standard. Yan Zili, Zhang Yang, Guo Yiming, Zhang Shuhua, Dai
Fumin, Li Chunhui, Liu Jinlong, Leng Guanjun, Shan Jingbo, Yang Xiaojun.
The historical version of GB 12981 replaced by this Standard is as follows.
- GB 12981-1991;
- GB 12981-2003.
Motor vehicle brake fluids
WARNING. This product is not classified as flammable dangerous goods, but it
may irritate eyes and skin, so it shall rinse with water immediately once exposed
to this product; this product has a corrosion effect on the paint.
1 Scope
This Standard specifies the requirements and test methods, inspection rules and
marking, packaging, transportation and storage of non-petroleum-based brake fluids
for hydraulic braking and hydraulic clutch systems of motor vehicles.
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.
GB/T 265 Petroleum products - Determination of kinematic viscosity and calculation
of dynamic viscosity
3 Product variety and markings
The makings of brake fluid products shall be at least marked. product class “motor
vehicle brake fluid”
For example. HZY3 motor vehicle brake fluid
4 Requirements and test methods
The technical requirements and test methods for motor vehicle brake fluids are shown
in Table 1 and Table 2.
5 Inspection rules
The type inspection items are all the inspection items specified in Table 1 of Clause 4
(the inspection items specified in Table 2 may also be included in the agreement
between supply and demand parties). Type inspection shall be carried out every 2
years.
requirements of Table 2), re-take double samples for re-inspection according to GB/T
4756.If the re-inspection result does not meet the technical requirements, then this
batch of product is determined unqualified.
6 Marking, packaging, transportation and storage
The markings, packaging, transportation and storage of this product are carried out in
accordance with SH 0164 and GB/T 5345.
Annex A
(informative)
Comparison table of clause numbers of this Standard and ISO 4925.2005
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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