GB/T 30313-2013 English PDF (GBT30313-2013)

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GB/T 30313-2013: High temperature intake air rubber hose and hose assemblies for auto brake system
GB/T 30313-2013
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.40; 83.140.40
G 42
High temperature intake air rubber hose and hose
assemblies for auto brake system
ISSUED ON: DECEMBER 31, 2013
IMPLEMENTED ON: SEPTEMBER 01, 2014
Issued by: General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Classification ... 4 
4 Structure and materials ... 5 
5 Dimensions and tolerances ... 5 
6 Minimum bending radius ... 5 
7 Technical requirements ... 6 
8 Test frequency ... 8 
9 Marking ... 8 
Appendix A (Normative) Type test and routine test ... 10 
Appendix B (Informative) Production acceptance test ... 11 
High temperature intake air rubber hose and hose
assemblies for auto brake system
1 Scope
This Standard specifies the classification, structure and materials, dimensions
and tolerances, minimum bending radius, technical requirements, test
frequency and marking of high temperature intake air rubber hose and hose
assemblies for auto brake system.
This Standard applies to the hose assembly for intaking high temperature
compressed air, which connects the automobile pneumatic brake system air
pump to the air storage tank. The maximum working pressure is 1 MPa; the
internal and external temperature range is -40 °C ~ +250 °C.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
GB/T 1690, Rubber, vulcanized or thermoplastic - Determination of the effect
of liquids
GB/T 5563, Rubber and Plastics Hoses and Hose Assemblies - Hydrostatic
Testing
GB/T 9573, Rubber and plastics hoses and hose assemblies - Methods of
measurement of the dimensions of hoses and the lengths of hose
assemblies
GB/T 10125, Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 24134-2009, Rubber and plastics hoses - Assessment of ozone
resistance under static conditions
3 Classification
Hoses are divided into two types according to the applicable temperature:
Take a 450 mm long hose or hose assembly and stretch it longitudinally at a
rate of 25 mm/min ± 2.5 mm/min until the hose is separated from the joint or
the hose is broken. The load shall not be less than 1 100 N when the nominal
inner diameter is 6.3 mm and below; the load shall not be less than 1 500 N
when the nominal inner diameter is above 6.3 mm.
7.5 Temperature resistance
7.5.1 High temperature resistance
The hose assembly after the verification pressure test in 7.2 is subjected to 72
h ± 2 h hot air aging according to the following environmental conditions:
-- Type 1, 200 °C;
-- Type 2, 250 °C;
Park the sample in the experimental environment for 2 h; then, perform the test
according to 7.2; there shall be no leakage.
7.5.2 Low temperature resistance
The hose assembly through the verification pressure test in 7.2 shall be frozen
for 72 h ± 2 h in a -40 °C environment, and then parked in the experimental
environment for 2 h, and then tested according to 7.2. There shall be no leakage.
7.6 Environmental resistance
7.6.1 Oil
Test according to GB/T 1690; prepare the sample from the inner lining layer;
immerse in ASTM IRM 903 oil at 100 °C ± 2 d for 72 h ± 2 h; take it out; then,
perform the measurement. The volume expansion shall not exceed 100%.
7.6.2 Ozone
Take out the inner lining layer of the hose assembly; test it under the conditions
where the ozone pressure is (100 ± 10) MPa according to Method 1 of GB/T
24134-2009; use a 7x magnifying glass to observe. The hose shall not be
cracked.
7.6.3 Salt spray test
Perform the test according to GB/T 10125. Support or hang the hose assembly
at an angle of 15° ~ 30° from the vertical to expose it to the salt spray for 24 h
± 1 h. After this exposure, the joint shall have no metal corrosion except for the
red rust in the marking embossing and wrinkle deformation parts. White rust
products are acceptable.
8 Test frequency
Inspection is divided into type test, production acceptance test and routine test.
Type test and routine test shall be carried out in accordance with Appendix A.
Type tests are those tests that confirm that the design of a specific hose
produced by a specific method meets the requirements of this Standard. The
test shall be carried out at most every other year or whenever the manufacturing
method or material used changes. The type test shall include all types of hoses
of all specifications.
Routine tests are those tests required for each finished hose before leaving the
factory.
Production acceptance tests are those tests that are recommended to control
manufacturing quality (see Appendix B). The number of tests specified in
Appendix B is for guidance only.
9 Marking
9.1 The surface of the hose shall have the following obvious marks that are not
easy to fall off:
a) identification of the hose manufacturer;
b) hose name;
c) number of this national standard;
d) type of the hose;
e) nominal inner diameter of the hose;
f) date of manufacture (year and month).
Example: