PDF GB/T 5921-2015 English (GB/T 5921-1986: Older version)
Search result: GB/T 5921-2015 (GB/T 5921-1986 Older version)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 5921-2015 | English | 90 |
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Motor vehicles and towed vehicles -- Air braking systems -- Identification of connections on units
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| GB/T 5921-1986 | English | 199 |
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Motor vehicles and towed vehicles. Air braking systems. Identification of connections on units
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PDF Preview: GB/T 5921-2015
GB/T 5921-2015: PDF in English (GBT 5921-2015) GB/T 5921-2015
Page 1 of 7
GB
ICS 43.040.40
T 24
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
Replacing GB/T 5921-1986
Motor vehicles and towed vehicles - Air braking
systems - Identification of connections on units
(ISO 6786.1980, Road vehicles - Air braking systems -
Identification of connections on units, MOD)
ISSUED ON. SEPTEMBER 11, 2015
IMPLEMENTED ON. JANUARY 01, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Page 2 of 7
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Mark ... 5
3 Examples ... 6
Page 3 of 7
Foreword
This standard is drafted as per the rules of GB/T 1.1-2009.
This standard replaces GB/T 5921-1986 “Motor vehicles and towed vehicles -
Air braking systems - Identification of connections on units”. As compared with
GB/T 5921-1986, the main technical changes of this standard are as follows.
- CHANGE the "Introduction" into "Scope" (see Chapter 1 of this version;
Chapter 1 of 1986 version);
- DELETE the consistency descriptions with international standard of
Chapter 1 (see Clause 1.3 of 1986 version);
- AMEND the title of Chapter 2 (see Chapter 2 of this version; Chapter 2 of
1986 version);
- COMBINE the Chapter 2 and 3 of the previous standard, and re-edit the
clause structures;
- ADD the mark descriptions of same connection with multiple functions (see
Clause 2.5 of this version).
Adopting re-drafting method, this standard modifies-adopts ISO 6786.1980
“Road vehicles – Air braking systems - Identification of connections on units
(English Version)”. As compared with ISO 6786.1980, the main structural
modifications are as follows.
- INCORPORATE Chapter 2 of ISO 6786 into Chapter 1 of this standard;
- REVISE Clause 3.1.1 and 3.1.2 of ISO 6786 as the listed items of Clause
2.1 of this standard;
- RE-NUMBER the clauses of each paragraph of Clause 3.2 of ISO 6786.
This Standard was proposed by the Ministry of Industry and Information
Technology of the People's Republic of China.
This Standard shall be under the jurisdiction of National Technical Committee
of Auto Standardization (SAC/TC 114).
The drafting organization of this Standard. Technical Centre of China First
Automobile Works Co., Ltd., Ruili Group Ruian Auto Parts Co., Ltd., and
WABCO Vehicle Control System (Shanghai) Co., Ltd.
Page 5 of 7
Motor vehicles and towed vehicles - Air braking
systems - Identification of connections on units
1 Scope
This standard specifies the method for identifying connections on each unit of
air braking system of motor vehicles and towed vehicles (including the
pneumatic units of air-over-hydraulic braking system).
This standard applies to motor vehicles and towed vehicles, as well as for the
braking system diagram.
2 Mark
2.1 The marking code is composed of following one or two digits; the marking
digits shall be located on a prominent place close to the connections of units.
a) The first digit.
0 vacuum connection
1 air intake connection
2 air vent connection (not to atmosphere, see digit 3)
3 exhaust connection
4 control connection (access unit)
5 spare
6 spare
7 antifreeze connection
8 lubricant connection (for air compressor)
9 coolant connection (for air compressor)
b) The second digit.
When there are several connections of similar functions on one unit, such as in
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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