GB/T 7127.1-2000 PDF in English
GB/T 7127.1-2000 (GB/T7127.1-2000, GBT 7127.1-2000, GBT7127.1-2000)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 7127.1-2000 | English | 160 |
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Brake hose assemblies for hydraulic braking systems of road vehicles used with non-petroleum-base brake fluid
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| GB/T 7127-1986 | English | RFQ |
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Rubber hose for automotive hydraulic brake system
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Standards related to (historical): GB/T 7127.1-2000
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GB/T 7127.1-2000: PDF in English (GBT 7127.1-2000) GB/T 7127.1-2000
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.040.70
G 42
eqv ISO 3996:1995
Brake hose assemblies for hydraulic braking systems
of road vehicles used with non-petroleum-base brake
fluid
ISSUED ON: JULY 31, 2000
IMPLEMENTED ON: MARCH 01, 2001
Issued by: State Bureau of Quality Technical Supervision
Table of Contents
Foreword ... 3
ISO Foreword ... 5
1 Scope ... 6
2 Normative references ... 6
3 Definition ... 7
4 Structure ... 7
5 Performance qualification test ... 8
6 Test ... 9
7 Marks and signs ... 21
Foreword
This standard equivalently adopts the international standard ISO 3996:1995
"Brake hose assemblies for hydraulic braking systems of road vehicles used
with non-petroleum-base brake fluid", which is a revision of GB 7127-1986
"Rubber hose for automotive hydraulic brake system".
The main differences between this standard and GB 7127-1986 are as follows:
- CHANGE the scope of application, expanding from use for automobiles to
use for road vehicles (including automobiles, cars, motorcycles, etc.);
- SPECIFY the performance requirements, test procedures, markings, for
hydraulic brake hose assemblies, which have a nominal inner diameter of
3.2 mm and 4.8 mm;
- SPECIFY the structure of the hose in detail; there is no separate
requirement on the pipe joints, which is classified as hose assemblies;
- CLARIFY the definitions for brake hose assemblies, brake hoses, etc.;
- DELETE the drawing of the tensile test of the automobile hydraulic brake
hose;
- In the high-temperature impulse strength test, in addition that, the brake
hose assembly shall be free from leakage, after being kept under a
pressure of 27.6 MPa, for 2 minutes, ADD that "no burst under a pressure
lower than 34.5 MPa"; ADD the high-temperature impulse strength test: at
least 150 impulse tests under the pressure of 11 MPa + 0.50 MPa, at a
temperature of 143 °C ± 3 °C;
- ADD dynamic ozone resistance test.
This standard replaces GB 7127-1986, from the date of implementation.
This standard was proposed by the former Ministry of Chemical Industry of the
People's Republic of China.
This standard shall be under the jurisdiction of the Hoses Subcommittee of the
National Rubber and Rubber Products Standardization Technical Committee.
The responsible drafting organizations of this standard: Shenyang Rubber
Research and Design Institute.
The participated drafting organizations of this standard: Nanjing 7425 Factory,
Shanghai Rubber Factory, Taizhou Rubber Factory Changli Resin Tube Factory,
Changchun Automobile Research Institute.
Brake hose assemblies for hydraulic braking systems
of road vehicles used with non-petroleum-base brake
fluid
1 Scope
This standard specifies the performance requirements, test procedures,
markings for hydraulic brake hose assemblies, which have a nominal inner
diameter of 3.2 mm and 4.8 mm, for the hydraulic brake system of road vehicles.
This standard applies to the hoses, which are made of cord reinforcement
layers and synthetic elastomers, AND the hydraulic brake hose assemblies,
which are equipped with metal pipe joints, that use the non-petroleum-based
brake fluids which meet the requirements of GB 12981.
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. At the time of publication, the editions
indicated were valid. All standards will be revised, and all parties using this
standard shall explore the possibility of using the latest version of the following
standards.
GB/T 7129-1986 Determination of volumetric expansion of rubber hose for
automotive hydraulic brake system (neq ISO 3996:1978)
GB 12981-1991 Synthetic brake fluid HZY2, HZY3, HZY4 (neq ISO
4925:1978)
ISO 4926:1978 Road vehicles - Hydraulic brake systems - Non-petroleum
base reference fluids
ISO 7500-1:1986 Metallic materials - Verification of static uniaxial testing
machines - Part 1: Tensile testing machines
ISO 9227:1990 Corrosion tests in artificial atmospheres - Salt spray tests
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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