GB/T 44262-2024 PDF English
Search result: GB/T 44262-2024 English: PDF (GB/T44262-2024)
Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
GB/T 44262-2024 | English | 260 |
Add to Cart
|
0-9 seconds. Auto-delivery.
|
Technical requirements for sampling of hydrogen for proton exchange membrane fuel cell vehicles
| Valid |
BUY with any currencies (Euro, JPY, GBP, KRW etc.): GB/T 44262-2024 Related standards: GB/T 44262-2024
PDF Preview: GB/T 44262-2024
GB/T 44262-2024: PDF in English (GBT 44262-2024) GB/T 44262-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.010
CCS F 19
Technical Requirements for Sampling of Hydrogen for
Proton Exchange Membrane Fuel Cell Vehicles
ISSUED ON: JULY 24, 2024
IMPLEMENTED ON: NOVEMBER 1, 2024
Issued by: State Administration for Market Regulation;
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 Equipment ... 5
5 Pre-sampling Preparation ... 8
6 Sampling Steps ... 8
7 Sampling Record ... 12
Appendix A (informative) Sampling Record of Hydrogen for Proton Exchange
Membrane Fuel Cell Vehicles ... 13
Bibliography ... 14
Technical Requirements for Sampling of Hydrogen for
Proton Exchange Membrane Fuel Cell Vehicles
WARNING: hydrogen is a flammable and explosive gas. This document does not address
all safety issues related to its application. Before adopting this document, the user is
responsible for formulating corresponding safety and protection measures, clarifying its
limited scope of application, and ensuring the compliance with the provisions of relevant
national laws, regulations and mandatory national standards.
1 Scope
This document specifies the requirements for hydrogen sampling equipment, pre-sampling
preparation, sampling steps and sampling record for proton exchange membrane fuel cell
vehicles.
This document is applicable to the sampling of hydrogen in hydrogen refueling stations with a
pressure level not greater than 70 MPa. The sampling of hydrogen for proton exchange
membrane fuel cells in the production, storage and transportation sites may take this as a
reference.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 1226 General Pressure Gauge
GB/T 1227 Accurate Pressure Gauge
GB/T 8979 Pure Nitrogen and High Purity Nitrogen and Ultra Pure Nitrogen
GB/T 12244 General Requirements for Pressure Reducing Valves
GB 12358 Gas Monitors and Alarms for Workplace - General Technical Requirements
GB/T 21465 Terminology for Valves
GB/T 24499 Technology Glossary for Gaseous Hydrogen, Hydrogen Energy and Hydrogen
Energy System
GB/T 26779 Hydrogen Fuel Cell Electric Vehicle Refueling Receptacle
GB/T 29729 Essential Requirements for the Safety of Hydrogen Systems
GB/T 37244 Fuel Specification for Proton Exchange Membrane Fuel Cell Vehicles - Hydrogen
GB/T 43306 Gas Analysis - Sampling Guidelines
GB/T 43674 General Requirements of Hydrogen Fueling Stations
GB 50156 Technical Standard of Fueling Station
GB 50516 Technical Code for Hydrogen Fueling Station (version 2021)
3 Terms and Definitions
The terms and definitions defined in GB/T 21465, GB/T 24499 and GB/T 43306 are applicable
to this document.
4 Equipment
4.1 Hydrogen Sampling Device
4.1.1 General requirements
The hydrogen sampling device shall satisfy the following requirements:
---The design of the hydrogen sampling device shall comply with the relevant provisions
of GB 50156, GB 50516 and GB/T 43674;
---Materials in contact with hydrogen in the hydrogen sampling device shall comply with
the relevant provisions of GB/T 29279;
---The hydrogen sampling device shall not contaminate the sample, and the materials in
contact with hydrogen in the sampling device shall not adsorb the collected components.
The overall performance shall be subject to a quality assessment in accordance with
GB/T 43306.
4.1.2 Basic composition
The hydrogen sampling device should be equipped with sampling source port, stop valve,
pressure gauge, pressure reducing valve, inlet valve, outlet valve, sampling gas cylinder, bypass
valve, safety valve, check valve, venting component and grounding component. It is advisable
to choose valves with a small dead volume. The schematic diagram of the hydrogen sampling
device is shown in Figure 1. Hydrogen sampling devices with the same functions as shown in
the Figure may also adopt this Figure.
Each sample source port of the hydrogen sampling device shall be equipped with a separate
stop valve, and the nominal pressure of the stop valve shall be greater than the maximum
allowable working pressure of the sample source port.
4.1.3.3 Pressure gauge
The pressure gauge shall comply with the provisions of GB/T 1226 or GB/T 1227. The
measuring range of the sample source pressure gauge should be 1.5 ~ 3.0 times the maximum
allowable working pressure of the sample source port, and the measuring range of the output
pressure gauge should be 1.5 ~ 3.0 times the design sampling pressure.
4.1.3.4 Pressure reducing valve
The pressure reducing valve shall comply with the provisions of GB/T 12244 and GB/T 43306.
Its material should be stainless steel and subject to inert treatment, and the dead volume should
be as small as possible. The nominal pressure shall be greater than the maximum allowable
working pressure of the sample source port. The outlet pressure shall be adjustable to the design
sampling pressure.
4.1.3.5 Inlet valve, outlet valve and bypass valve
The inlet valve, outlet valve and bypass valve shall be valves that are easy to open and close
(for example, ball valves), and the nominal pressure shall be greater than the set pressure of the
safety valve.
4.1.3.6 Sampling gas cylinder
The sampling gas cylinder shall comply with the relevant provisions of special equipment and
be exclusively used. Its nominal working pressure shall not be lower than the maximum design
sampling pressure. The sampling gas cylinder should be a double-valve type. For sampling gas
cylinder used for adsorbent impurity detection, the inner wall, inlet valve and outlet valve of
the gas cylinder shall be subject to the inert treatment.
4.1.3.7 Safety valve
The safety valve should be a full-open safety valve, and the set pressure should be 1.05 ~ 1.15
times the maximum design sampling pressure of the hydrogen sampling device.
4.1.3.8 Check valve
The opening pressure of the check valve should be greater than 69 kPa.
4.1.3.9 Venting component
A venting component shall be used to vent hydrogen generated during the sampling process.
The venting component shall include a separate venting pipe and connecting hose. Its design
and layout shall comply with the provisions of GB 50156, GB 50516 and GB/T 43674. The
design pressure shall be greater than the set pressure of the safety valve.
4.1.3.10 Grounding component
The grounding component shall comply with the provisions of GB 50156, GB 50516 and GB/T
43674.
4.1.3.11 Connecting pipelines
The nominal pressure of the pipeline at the front of the pressure reducing valve shall be greater
than the maximum allowable working pressure of the sample source port, and the nominal
pressure of the remaining pipelines shall be greater than the set pressure of the safety valve.
The material of the pipelines should be stainless steel and subject to the inert treatment. The
connection mode of the pipelines should be metal ferrule connection, metal gasket connection
(VCR connection) or welding.
4.2 Hydrogen Leak Detector
The hydrogen leak detector is used to detect leaks in the sampling device and shall comply with
the provisions of GB 12358.
5 Pre-sampling Preparation
5.1 Before sampling, in accordance with the demands for sample testing, determine the
sampling volume, sampling pressure and specifications of the sampling gas cylinder.
5.2 Before sampling, the sampling gas cylinder shall be cleaned to remove air, moisture and
other contaminants. When the hydrogen retained in the sampling gas cylinder complies with
the provisions of GB/T 37244 and the pressure is not less than 0.2 MPa (gauge pressure), the
sampling gas cylinder does not need to be cleaned.
5.3 Before sampling, nitrogen that complies with the provisions of high purity nitrogen in GB/T
8979 shall be used to blow the hydrogen sampling device, so as to remove air and moisture.
During blowing, the sampling device shall not be equipped with a sampling gas cylinder. After
blowing is completed, all valves of the sampling device shall be closed to prevent air from
entering. Water, isopropyl alcohol or other solvents shall not be used to clean the hydrogen
sampling device.
NOTE: the residual nitrogen here can be easily removed when the system is blown in accordance
with 6.3 and will not affect subsequent sample analysis.
6 Sampling Steps
NOTE: when the sampling device is equipped with multiple sample source ports and stop valves,
the stop valve described in this Chapter refers to the stop valve corresponding to the sample
source port to be sampled, and the stop valves corresponding to the other sample source
ports are closed throughout the process.
accessories of the hydrogen sampling device are replaced or re-connected, leak detection shall
be performed again.
6.3 System Blowing
6.3.1 General rules
The system blowing shall be carried out in accordance with 6.3.2 or 6.3.3. When sampling the
hydrogen refueling nozzle outlet, it shall be carried out in accordance with 6.3.2.
6.3.2 Continuous blowing displacement method
The continuous blowing displacement method is carried out in accordance with the following
steps:
a) When confirming that the stop valve A is closed, open the sample source hydrogen
valve;
b) Slowly open the stop valve A and adjust the pressure reducing valve B to the sampling
pressure;
c) Successively open the inlet valve D, sampling gas cylinder inlet valve E, sampling
gas cylinder outlet valve F and outlet valve G to allow the blown hydrogen to flow
through the sampling device and sampling gas cylinder.
During operation, the pressure and temperature of the sampling gas cylinder shall be observed.
When the gas cylinder pressure exceeds the sampling pressure or the gas cylinder temperature
is significantly higher than the ambient temperature, the sample source hydrogen valve shall be
immediately closed. The amount of gas blown shall be not less than 600 times the total volume
of the sampling gas cylinder and the sampling device pipeline.
6.3.3 Inflate-vent displacement method
The inflate-vent displacement method is carried out in accordance with the following steps:
a) Confirm that the stop valve A is closed and open the sample source hydrogen valve;
b) Slowly open the stop valve A and adjust the pressure reducing valve B to the sampling
pressure;
c) Successively open the inlet valve D and sampling gas cylinder inlet valve E to allow
hydrogen to flow into the sampling gas cylinder;
d) After the output pressure gauge is stable, close the inlet valve D, open the sampling
gas cylinder outlet valve F and outlet valve G, vent the hydrogen in the sampling gas
cylinder and pipeline, and close the outlet valve G;
e) Open the inlet valve D. After the output pressure gauge is stable, close the inlet valve
D, open the outlet valve G, vent the hydrogen in the sampling gas cylinder and
pipeline, and then, close the outlet valve G;
f) When the sampling pressure is less than or equal to 3 MPa, repeat step e) for no less
than 9 times; when the sampling pressure is greater than 3 MPa, repeat step e) for no
less than 6 times.
During operation, the pressure and temperature of the sampling gas cylinder shall be observed.
When the gas cylinder pressure exceeds the sampling pressure or the gas cylinder temperature
is significantly higher than the ambient temperature, the sample source hydrogen valve shall be
immediately closed.
6.4 Sample Collection
6.4.1 After completing the system blowing in accordance with 6.3.2, follow the following steps
to collect samples:
a) Close the sampling gas cylinder outlet valve F;
b) After the output pressure gauge is stable, close the sampling gas cylinder inlet valve
E;
c) Close the sample source hydrogen valve and the stop valve A;
d) Open the bypass valve C to discharge the remaining hydrogen in the hydrogen
sampling device;
e) Close the inlet valve D and outlet valve G, and remove the sampling gas cylinder;
f) Use a hydrogen leak detector to detect leaks in the removed sampling gas cylinder.
During operation, the pressure and temperature of the sampling gas cylinder shall be observed.
When the gas cylinder pressure exceeds the sampling pressure or the gas cylinder temperature
is significantly higher than the ambient temperature, the sample source hydrogen valve shall be
immediately closed.
6.4.2 After completing the system blowing in accordance with 6.3.3, follow the following steps
to collect samples:
a) Open the inlet valve D;
b) After the output pressure gauge is stable, close the sampling gas cylinder outlet valve
F and the sampling gas cylinder inlet valve E;
c) Close the sample source hydrogen valve and the stop valve A;
d) Open the bypass valve C to discharge the remaining hydrogen in the hydrogen
sampling device;
...... Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
|