GB/T 25986-2010 PDF English
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Filling device of natural gas vehicles
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GB/T 25986-2010: PDF in English (GBT 25986-2010) GB/T 25986-2010
GB
ICS 43.020
T 09
National Standard
of the People’s Republic of China
Filling device of natural gas vehicles
ISSUED ON. JANUARY 10, 2011
IMPLEMENTED ON. MAY 1, 2011
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 ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Basic types, specifications and models ... 5
5 Requirements ... 6
6 Test methods ... 8
7 Inspection rules ... 13
8 Marks, packaging, transportation and storage ... 14
9 Exit-factory files ... 15
Appendix A ... 16
Appendix B ... 18
Foreword
Appendixes A and B of this Standard are normative.
This Standard was proposed by the National Development and Reform
Commission of the People’s Republic of China.
This Standard shall be under the jurisdiction of the National Technical
Committee for Standardization of Automobiles (SAC/TC 114).
Drafting organizations of this Standard. China Automotive Technology and
Research Center, and Beijing Institute of Space Launch Technology.
Main drafters of this Standard. Guo Yong, Chen Song, Qiao Shenghua, Fu
Yiping, Yang Junheng, and Wang Jifeng.
Filling device of natural gas vehicles
1 Scope
This Standard specifies the definition, type, technical requirements, test
methods, inspection rules, marks, packaging, transportation and storage of the
filling device of natural gas vehicles.
This Standard applies to the filling device of natural gas vehicles whose nominal
operating pressure is 1.6MPa (all the pressure values described in this
Standard refer to gage pressure), and whose working medium meets the
requirements specified in the GB/T 19204.
2 Normative references
The provisions in the following documents become the provisions of this
Standard through reference in this Standard. For dated references, the
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, parties who reach an agreement based on this
Standard are encouraged to study if the latest versions of these documents are
applicable. For undated references, the latest versions apply to this Standard.
GB/T 191 Packaging – Pictorial marking for handling of goods
GB/T 1220 Stainless steel bars
GB/T 3864 Industrial nitrogen
GB/T 4240 Stainless steel wires
GB/T 4423 Copper and copper-alloy cold-drawn rod and bar
GB/T 9969 General principles for preparation of instructions for use of
industrial products
GB/T 10125 Corrosion tests in artificial atmospheres – Salt spray tests
GB/T 19204 General characteristics of liquefied natural gas
GB/T 20734 Mounting requirements for liquefied natural gas vehicle special
equipment
CB/T 3764 Thickness series and quality requirements for metallic and
5.2.8 Corrosion resistance
5.2.8.1 USE a 25× magnifier to inspect the components after conducting the
corrosion resistance test according to the test methods specified in the Clause
6.10.1. There shall be no cracks on the components.
5.2.8.2 INSPECT the gas tightness of the filling devices after conducting the
salt spray test according to the test methods specified in the Clause 6.10.2. The
gas tightness shall meet the requirements specified in the Clause 5.2.2.
5.2.9 Vibration resistance
5.2.9.1 After the vibration resistance test is conducted to the filling devices
according to the test methods specified in the Clause 6.11, the fasteners shall
not be loose, and shall still be able to be turned on or off in the normal way.
5.2.9.2 The test shall be respectively conducted to the filling devices
according to the test methods specified in the Clauses 6.4.1.1 and 6.4.2.1. The
test results shall meet the requirements specified in the Clause 5.2.2.
6 Test methods
6.1 Test conditions and instrument precision
6.1.1 Test conditions
Unless otherwise specified, the conditions of test environment and the test
medium shall meet the following requirements.
a) The temperature shall be within the range of 15°C to 35°C;
b) The relative humidity shall not be greater than 85%;
c) The atmospheric pressure shall be within the range of 86kPa to 106kPa;
d) The qualified liquid nitrogen and dry air conforming to the provisions
specified in the GB/T 3864 shall be used as test medium.
6.1.2 Precision and range of test instruments
Unless otherwise specified, the precision and range of instruments shall meet
the following provisions.
a) Electrotechnical instruments. The precision shall not be lower than Level
1.0, and the range shall be 1.5 ~ 3 times the measured value;
b) Pressure instruments. The precision shall not be lower than Level 1.5, and
PLACE the test pieces in room temperature. VENTILATE compressed air from
the outlet end. Respectively HOLD the pressure at the locations where the
pipeline pressure is 1.8MPa and 0.05MPa for 3min. CONDUCT the test
afterwards.
6.4.1.2 Gas leakage test at high temperature
PLACE the test pieces in the environment at 82°C. VENTILATE compressed
air from the outlet end. Respectively HOLD the pressure at the locations where
the pipeline pressure is 1.8MPa and 0.05MPa for 3min. CONDUCT the test
afterwards.
6.4.1.3 Gas leakage test at low temperature
PLACE the test pieces in the environment at -40°C. VENTILATE compressed
air from the outlet end. Respectively HOLD the pressure at the locations where
the pipeline pressure is 1.8MPa and 0.05MPa for 3min. CONDUCT the test
afterwards.
6.4.2 Gas leakage test for reclaiming receptacles
6.4.2.1 Gas leakage test at room temperature
PLACE the test pieces in room temperature. VENTILATE compressed air from
the outlet end. Respectively HOLD the pressure at the locations where the
pipeline pressure is 1.6MPa and 0.05MPa for 3min. CONDUCT the test
afterwards.
6.4.2.2 Gas leakage test at high temperature
PLACE the test pieces in the environment at 82°C. VENTILATE compressed
air from the outlet end. Respectively HOLD the pressure at the locations where
the pipeline pressure is 1.6MPa and 0.05MPa for 3min. CONDUCT the test
afterwards.
6.4.2.3 Gas leakage test at low temperature
PLACE the test pieces in the environment at -40°C. VENTILATE compressed
air from the outlet end. Respectively HOLD the pressure at the locations where
the pipeline pressure is 1.6MPa and 0.05MPa for 3min. CONDUCT the test
afterwards.
6.5 Low-temperature leakage test
6.5.1 Low-temperature leakage test for filling receptacles
VENTILATE liquid nitrogen into the test pieces for precooling. IMMERSE the
SEPARATE the filling device from the reclaiming receptacle after the pressure
comes up to 1.6MPa. The one-way valve shall close automatically, so as to
keep the pressure in the reclaiming receptacle for no less than 2s. OPEN the
outlet end afterwards to release the pressure to 0MPa. Repeatedly OPEN and
CLOSE the one-way valve. The cycle frequency for opening and closing shall
not be more than 5 times/min. The total number of cycle test shall be 1,000.
OBSERVE the sealing condition whenever 200 cycle tests have been
conducted. CONDUCT the gas leakage test at room temperature according to
the provisions specified in the Clause 6.4.2.1. CONTINUE to conduct the test if
there is no leakage.
6.7.2 Full-flow impact test
The starting air supply pressure shall be 1.8MPa at the inlet of the filling
receptacle. There are no restrictions on the outlet flow. The duration for each
impact shall not be less than 2s. The air supply pressure shall not be lower than
1.3MPa at the end of the impact. RELEASE the pressure at the inlet afterwards
to close the one-way valve. CONTINUE to conduct 30 impact tests.
The starting air supply pressure shall be 1.8MPa at the inlet of the reclaiming
receptacle. There are no restrictions on the outlet flow. The duration for each
impact shall not be less than 2s. The air supply pressure shall not be lower than
1.3MPa at the end of the impact. RELEASE the pressure at the inlet afterwards
to close the one-way valve. CONTINUE to conduct 30 impact tests.
6.8 Oxygen aging resistance test
PLACE the non-metallic components of filling devices in contact with the natural
gas in the oxygen at (70 ± 2) °C with the pressure of 2.0MPa for 96h.
6.9 Compatibility test
IMMERSE the non-metallic test pieces of filling devices in contact with the
natural gas in the natural gas at (23 ± 2) °C with the pressure of 1.8MPa for
70h. Rapidly REDUCE the pressure to 0 afterwards.
6.10 Corrosion resistance test
6.10.1 PUT the brass component maintaining maximum operating stress
(generated by mechanical assembly and 1.6MPa atmospheric pressure) and
without any greasy dirt on its surface into a 30L sealed test vessel containing
0.6L of aque...
...... Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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