GB/T 37563-2019 PDF English
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Safety Requirements for Pressurized Water Electrolysis System for Hydrogen Production
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GB/T 37563-2019: Safety Requirements for Pressurized Water Electrolysis System for Hydrogen Production
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT37563-2019
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.180
F 19
Safety Requirements for Pressurized Water
Electrolysis System for Hydrogen Production
Issued on. JUNE 4, 2019
Implemented on. OCTOBER 1, 2019
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 Hazardous and Harmful Factors of Hydrogen Production System... 6
5 Basic Requirements... 9
6 Environmental Conditions... 9
7 Equipment and Pipelines... 10
8 Electrical and Instrument Control... 13
9 Operation and Maintenance... 16
10 Operating Personnel... 19
11 Emergency Treatment... 19
Appendix A (informative) A Block Diagram of Typical Hydrogen Production
System... 21
Appendix B (informative) Hazardous and Harmful Factors of Main Hazardous
Chemicals and Unit Equipment of Hydrogen Production System... 22
Bibliography... 24
Foreword
This Standard was drafted in accordance with the rules in GB/T 1.1-2009.
This Standard was proposed by and shall be under the jurisdiction of National
Standardization Technical Committee for Hydrogen Energy (SAC/TC 309).
The main drafting organizations of this Standard. Tianjin Mainland Hydrogen
Equipment Co., Ltd.; Shandong Saikesaisi Hydrogen Energy Co., Ltd.; China National
Institute of Standardization; the 718th Research Institute of CSIC; Suzhou Jingli
Hydrogen Plant; China Electronics Engineering Design Institute; Beijing University of
Chemical Technology; Pudun (Beijing) Hydrogen Technol Co., Ltd.; CHySA
Technology Company Limited.
The main drafters of this Standard. Xu Wei, Zhao Yingchun, Ding Xiaotao, Yang
Yanmei, Zhou Zhenfang, Zhang Bihang, Liao Guoqi, Zhou Junbo, Li Kean, Li Junrong,
Xue Helai, Zhang Liyan, Wang Shourong, Ma Yibo.
Safety Requirements for Pressurized Water
Electrolysis System for Hydrogen Production
1 Scope
This Standard specifies the hazardous and harmful factors, and basic safety
requirements of pressurized water electrolysis system for hydrogen production
(hereinafter referred to as hydrogen production system), as well as the requirements
for environmental conditions, system components, operation and maintenance,
operating personnel and emergency treatment.
This Standard is applicable to alkaline water electrolysis system and proton exchange
membrane water electrolysis system with an operating pressure greater than or equal
to 0.3 MPa, and less than or equal to 5.0 MPa.
NOTE. in this Standard, pressure refers to gauge pressure.
2 Normative References
The following documents are indispensable to the application of this document. 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 150 (all parts) Pressure Vessels
GB/T 151 Heat Exchanger
GB 2894 Safety Signs and Guideline for the Use
GB 3836.1 Explosive Atmospheres - Part 1.Equipment - General Requirements
GB/T 4272 General Principles for Thermal Insulation Technique of Equipment and
Pipes
GB 7231 Basic Identification Colors and Code Indications and Safety Sign for Industrial
Pipelines
GB 12014 Protective Clothing - Static Protective Clothing
GB 12358 Gas Monitors and Alarms for Workplace - General Technical Requirements
GB 16808 Combustible Gas Alarm Control Units
GB/T 19774 Specification of Water Electrolyte System for Producing Hydrogen
GB 21146 Personal Protective Equipment - Occupational Footwear
3 Terms and Definitions
What is defined in GB/T 24499, and the following terms and definitions are applicable
to this document.
3.1 Hazardous and Harmful Factors
Hazardous and harmful factors refer to factors that may cause casualties, affect human
health and even cause diseases.
3.3 Risk Assessment
Risk assessment includes the whole process of risk identification, risk analysis and risk
evaluation.
3.4 Oxygen-enriched Atmosphere
Oxygen-enriched atmosphere refers to the environment where the volume fraction of
oxygen in the air is greater than 23.5%.
4 Hazardous and Harmful Factors of Hydrogen
Production System
4.1 Hazardous and Harmful Factors of Composition and Unit Equipment
of Hydrogen Production System
The composition of the hydrogen production system is determined by factors, such as.
the purpose and purity of the produced hydrogen / oxygen. A block diagram of typical
hydrogen production system is shown in Appendix A.
4.2 Leakage
Hydrogen would easily leak through porous materials, assembly surfaces or sealing
surfaces. After hydrogen leaks, it will rapidly diffuse, leading to continuous expansion
of the leakage-contaminated area, and the diffusion process is invisible to the naked
eye.
4.3 Fire Disasters and Explosions
The condition that causes hydrogen to catch fire or to explode is that the mixture of
hydrogen and air or oxygen reaches the flammable or explosive limit, and there is an
effective ignition source.
4.4 Suffocation
Hydrogen is a simple suffocating gas. At its high concentration, the oxygen partial
pressure in the air decreases and causes hypoxic suffocation.
4.5 Electric Shock
In the hydrogen production system, equipment or facilities that might cause personal
electric shocks include. water electrolyzers, rectifier transformers, rectifier cabinets,
electrical cabinets, motors and power transmission copper bars, etc. During the
operation and maintenance of the equipment, there is a danger of electric shock for
the operating personnel.
4.6 Thermal Injury
In the hydrogen generation system, the operating temperature range of the water
electrolyzer and some of its auxiliary equipment is 60 °C ~ 90 °C. The operating
temperature of the deoxygenation catalyst bed of the hydrogen purifier may reach
150 °C; the regeneration temperature of the drying bed (temperature-swing adsorption)
of the hydrogen purifier may reach 350 °C; if human body directly contacts the surface
of the equipment, it will lead to thermal injury.
4.7 Mechanical Injury
Mechanical Injury of the hydrogen production system mainly refers to the injury caused
by the direct contact of the moving parts of the mechanical equipment with the human
body.
5 Basic Requirements
5.1 Avoid the accumulation of hydrogen / air (oxygen) mixture in a confined space;
control the ignition source.
5.2 If possible, the number of people in hazardous environment shall be reduced, and
the duration of their stay shall be shortened.
5.4 Corresponding operating procedures shall be formulated.
5.5 Occupational safety education and operating skills training shall be conducted for
the operating personnel.
5.6 An emergency plan for accidents shall be developed.
6 Environmental Conditions
6.1 General Requirements
6.1.1 The design and installation of the hydrogen production system shall consider the
influence of the environmental conditions (such as. ambient temperature, ambient
humidity, altitude and seismic fortification intensity, etc.) of the user’s site on the safe
operation of the equipment.
6.2 Installation Location of Hydrogen Production System
6.2.1 The fire hazard category of the hydrogen production system shall be “A”; the
preparation of safety facilities on the installation site shall comply with the stipulations
of GB 50177.
6.2.2 Forbidden areas shall be set up in the hydrogen production system and its
surrounding areas; irrelevant persons are prohibited from entering.
6.2.5 The hydrogen production site should set up emergency lightings.
6.2.6 The hydrogen production site shall set up safety signs that comply with the
stipulations of GB 2894.
7 Equipment and Pipelines
7.1 General Requirements
7.1.1 The design, manufacturing, installation and acceptance inspection of the oxygen
recovery equipment, pipelines and accessories of the hydrogen production system
shall comply with the stipulations of GB 50177 and GB/T 19774.
7.1.4 The arrangement of equipment and pipelines shall make it convenient for
operation and maintenance; in case of an emergency, it shall be convenient for the
evacuation of personnel.
7.1.5 The condensed water in the hydrogen equipment and pipelines shall be drained
to the outdoors through the drainage water seal.
7.1.6 Preventive measures shall be taken for the stress and displacement caused by
expansion and contraction of the equipment and pipelines.
7.1.7 The degreasing of equipment, pipelines and their valves and accessories in
contact with oxygen shall comply with the stipulations of GB 50030 and HG 20202.
7.1.10 All rotating equipment shall be equipped with protective covers, or other
protective measures shall be taken.
7.1.11 For equipment with a high noise, control measures, such as. sound insulation,
noise elimination and vibration reduction, shall be adopted.
7.1.12 Equipment and valves shall be uniformly numbered; the safety signs for
pipelines shall comply with the stipulations of GB 7231.
7.2 Single Equipment
7.2.1 Water electrolyzer
The performance parameters and the structure of water electrolyzer shall be based on
the basic requirements of reducing unit hydrogen power consumption, reducing
manufacturing costs and extending service life.
7.2.2 Pressure vessel
The pressure vessel of the hydrogen production system is mainly used for gas-liquid
separation, cooling, heating and storage. The material, design, manufacturing,
inspection and acceptance inspection of pressure vessels shall comply with the
stipulations of TSG 21, GB/T 150 and GB/T 151.
7.2.3 Hydrogen purifier
The hydrogen purifier shall take thermal insulation measures. The inlet of the hydrogen
purifier should be equipped with a flow detection instrument. The operations
(temperature control and valve switching, etc.) of the hydrogen purification process
should adopt automatic control devices.
7.2.6 Pressure relief device
Safety valve shall be a fully-enclosed type. It may only be used after being lead-sealed
with qualification in calibration. The safety valve shall be vertically installed near the
equipment being protected; the installation location shall make it convenient for
inspection and maintenance.
7.2.7 Flame arrester
The hydrogen vent pipeline shall be equipped with a flame arrester. The setting of the
flame arrester shall comply with the relevant stipulations of GB 50177.
7.3 Pipelines and Accessories
7.3.1 The design and installation of pipelines and accessories of the hydrogen
production system shall comply with the relevant stipulations of GB/T 19774.
7.3.5 After the installation of the hydrogen / oxygen pipelines, strength test, air-
tightness test and leakage test shall be conducted. This type of tests shall be
performed in accordance with GB 50177 and GB 50030.
7.3.6 The purging of the hydrogen / oxygen pipelines that are qualified in the leakage
test shall comply with the relevant stipulations of GB 50177 and GB 50030.When using
nitrogen for purging, measures shall be taken to prevent from suffocation.
8 Electrical and Instrument Control
8.1 General Requirements
8.1.1 The classification of the hazardous area of the hydrogen production system shall
comply with the stipulations of GB 50177 and GB 50058.
8.2 DC Power Supply
8.2.1 Each water electrolyzer shall be separately equipped with a DC power supply;
high-frequency switch rectifier, thyristor rectifier or diode rectifier should be adopted.
8.2.2 The DC power supply shall have the functions of voltage regulation and
automatic current stabilization; it shall be equipped with an overcurrent protection
device, which will automatically stop when it exceeds a predetermined value.
8.2.3 The high-voltage rectifier transformer equipped with the DC power supply shall
be located in a separate transformer chamber.
8.2.4 An emergency power-off button of the DC power supply shall be installed in the
electrolysis room. This button should be located in a place that is convenient for
operation.
8.3 Electro-heating Elements
8.3.1 The technical requirements of metallic tube-type electro-heating elements shall
comply with the stipulations of JB/T 2379.
8.4 Grounding
8.4.1 The metal shell, metal pipeline, metal base or frame of the hydrogen production
system shall be grounded. The grounding shall comply with the stipulations of GB
50177 and GB 50057.
8.4.4 The grounding of electrical installations shall be connected to the grounding trunk
through a separate grounding wire; no series connection is allowed.
8.4.5 All lightning protection and static protection grounding devices shall be regularly
tested for the grounding resistance at least once a year.
8.5 Hydrogen Leakage Detection
8.5.1 The hydrogen production system shall be equipped with a fixed hydrogen
detection alarm, and its technical performance shall comply with the stipulations of GB
12358 and GB 16808.The detector of the fixed hydrogen detection alarm shall be
installed in a place where hydrogen is easy to leak and accumulate.
8.5.2 The hydrogen production system shall be equipped with a portable hydrogen
detection alarm.
8.5.3 The fixed hydrogen detection alarm and the portable hydrogen detection alarm
shall be regularly calibrated.
8.5.4 The hydrogen detection alarm shall normally work during equipment
maintenance.
8.7 Automatic Control System
8.7.1 The automatic control system of the hydrogen production system shall conduct
centralized monitoring and automatic adjustment of the main process parameters.
When the equipment fails, it shall promptly give an alarm, shut down the machine, and
properly handle it.
8.7.2 The measuring range and accuracy grade of the meter shall satisfy the
requirements for use. The meters in contact with oxygen shall be grease-free.
8.7.5 Before new equipment is put into production, or, after overhauling, the automatic
control system shall receive tests and simulation tests, and comply with the following
requirements.
9 Operation and Maintenance
9.1 Preparation before First Actuation
9.1.1 It shall be confirmed that the various certificates and technical documents
provided by the manufacturer are complete and correct. These materials shall at least
include the following content.
9.1.2 The hydrogen production system shall be installed on site.
9.1.3 Before actuation, a comprehensive safety inspection shall be carried out; the
identified problems shall be rectified one by one.
9.1.4 The on-site production environment shall comply with the design requirements;
the various production auxiliary systems shall reach the conditions for actuation.
9.2 Equipment Operation
9.2.1 The preparation before daily actuation shall comply with the stipulations of 9.1.4
and 9.1.5.If the system is actuated from the pressure-holding state, then, no
replacement is required.
9.2.2 Before actuation, it shall be ensured that there is no debris on the water
electrolyzer, so as to prevent short circuit.
9.2.3 The hydrogen production system shall be actuated and unactuated strictly in
accordance with the operating procedures.
9.3 Equipment Maintenance
9.3.1 The maintenance and overhauling operations of the hydrogen production system
shall work out an operational scheme, which may be organized and implemented after
receiving approval.
9.3.2 The maintenance and overhauling operations shall execute the lockout / tagout
procedures.
9.3.7 When the safety facilities are being maintained, and there are no other alternative
measures, the operation of the protected equipment shall be stopped.
9.3.8 The records of maintenance and overhauling operations shall be kept for at least
3 years.
9.3.9 Equipment removal work shall be carried out in weather without thunder or
lightning. During the dismantling of the equipment, the hydrogen content in the air shall
be continuously monitored; once it exceeds 0.4% (volume fraction), the dismantling
work shall be immediately stopped.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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