GB/T 37563-2019 English PDF (GBT37563-2019)

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GB/T 37563-2019: Safety requirements for pressurized water electrolysis system for hydrogen production
GB/T 37563-2019
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 
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
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%.
3.5 Hot Work
Hot work refers to unconventional work that might generate flames, sparks or hot
surfaces in the forbidden area beyond the process equipment that directly or indirectly
generates open flames.
NOTE: for example, the use of electric welding, gas welding (cutting), blowtorch, electric
drill and grinding wheel, etc.
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.
The hazardous and harmful factors of the main hazardous chemicals and unit
equipment of the hydrogen production system are shown in Appendix B.
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.
The electrolyte of the alkaline water electrolysis system might leak due to various
reasons.
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
k) The electrical equipment generates electric arcs or sparks due to electric
leakage, short circuit, overload and excessive contact resistance; the
explosion-proof level of electrical equipment in the hazardous area does not
meet the requirements for use, which might also become a source of ignition;
l) Raindrops or other conductive objects fall on the water electrolyzer, causing
a short circuit and damage to the tank body, which might cause fire disasters
or explosions;
m) During the maintenance process, no effective isolation measures are taken
between the troubleshooting equipment and the in-use production system; the
replacement before hot work is not thorough; the sampling and analysis are
unrepresentative, or the analysis data is inaccurate, which might cause fire
disasters or explosions.
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.
The potassium hydroxide or sodium hydroxide involved in the alkaline water
electrolysis system is highly corrosive; direct contact with the skin and eyes may cause
chemical burns.
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.
kept unblocked.
6.2.4 Areas with alkaline liquor, including areas near the loading and unloading,
storage, analysis and sampling points of alkaline electrolyte, shall be equipped with
rinsing and eyewash facilities, and boric aqueous solution with a concentration of 2%
~ 3%.
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.
7.1.2 In terms ...