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GB/T 37562-2019 (GBT 37562-2019)

GB/T 37562-2019_English: PDF (GBT37562-2019)
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BASIC DATA
Standard ID GB/T 37562-2019 (GB/T37562-2019)
Description (Translated English) Technical conditions of pressurized water electrolysis system for hydrogen production
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard F19
Classification of International Standard 27.180
Word Count Estimation 22,297
Date of Issue 2019-06-04
Date of Implementation 2020-01-01
Drafting Organization Beijing University of Chemical Technology, Suzhou Jingli Hydrogen Equipment Co., Ltd., China National Institute of Standardization, China Shipbuilding Industry Corporation 718 Institute, Tianjin Continental Hydrogen Equipment Co., Ltd., Shandong Sikes Hydrogen Energy Co., Ltd., China Electronic Engineering Design Institute, Putton (Beijing) Hydrogen Technology Co., Ltd., Yanhua Hydrogen Energy Technology Co., Ltd., Sichuan Chuanyou Natural Gas Technology Co., Ltd.
Administrative Organization National Hydrogen Standardization Technical Committee (SAC/TC 309)
Regulation (derived from) National Standard Announcement No.7 of 2019
Proposing organization National Hydrogen Standardization Technical Committee (SAC/TC 309)
Issuing agency(ies) State Administration of Markets and China National Standardization Administration

GB/T 37562-2019
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.180
F 19
Technical conditions of pressurized water electrolysis
system for hydrogen production
ISSUED ON: JUNE 04, 2019
IMPLEMENTED ON: JANUARY 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 6 
4 Classification and designation... 7 
4.1 Pressurized alkaline water electrolysis system for hydrogen production ... 7 
4.2 Pressurized PEM water electrolysis system for hydrogen production ... 8 
5 Technical requirements ... 8 
5.1 Pressurized water electrolysis system for hydrogen production ... 8 
5.2 Single equipment ... 10 
5.3 Pipelines and accessories ... 15 
5.4 Electrical equipment and wiring ... 16 
5.5 Automatic control and monitoring ... 17 
5.6 Assembly and installation ... 19 
6 Test and detection ... 20 
6.1 Test conditions ... 20 
6.2 Test ... 21 
6.3 Detection ... 23 
7 Marking ... 25 
8 Product accompanying documents ... 26 
8.1 Handling and hoisting instructions ... 26 
8.2 System and equipment drawings ... 26 
8.3 Instruction manual ... 26 
8.4 Installation and maintenance manual ... 28 
9 Packaging ... 29 
Appendix A (Informative) Block diagram of typical pressurized water electrolysis
system for hydrogen production ... 31 
Appendix B (Informative) Test of gas production by volumetric method ... 33 
Appendix C (Informative) Calculation of gas production by current test value35 
Appendix D (Informative) Test of gas purity by analytical instruments ... 36 
Technical conditions of pressurized water electrolysis
system for hydrogen production
1 Scope
This Standard specifies the terms and definitions, classification and designation,
technical requirements, test and detection, marking, and packaging of
pressurized alkaline water electrolysis system for hydrogen production and
proton exchange membrane (PEM) water electrolysis system for hydrogen
production.
This Standard applies to pressurized alkaline water electrolysis and pressurized
PEM water electrolysis systems for hydrogen production, whose working
pressure is greater than or equal to 0.3 MPa and less than or equal to 5.0 MPa.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 150 (all parts) Pressure vessels
GB/T 151 Heat exchanger
GB/T 629 Chemical reagent - Sodium hydroxide
GB/T 1972 Disc spring
GB/T 2306 Chemical reagent - Potassium hydroxide
GB/T 2829 Sampling procedures and tables for periodic inspection by
attributes (apply to inspection of process stability)
GB/T 3634.2 Hydrogen - Part 2: Pore hydrogen, high pure hydrogen and
ultrapure hydrogen
GB 3836.1 Explosive atmospheres - Part 1: Equipment - General
requirements
GB 3836.14 Electrical apparatus for explosive gas atmospheres - Part 14:
GB/T 37563 Safety requirements for pressurized water electrolysis system
for hydrogen production
GB 50030 Code for design of oxygen station
GB 50058 Code for design of electrical installations in explosive
atmospheres
GB 50177 Design code for hydrogen station
HG 20202 Code for construction and acceptance of degreasing project
JB/T 4711 Coating and packing for pressure vessels transport
TSG 21 Supervision Regulation on Safety Technology for Stationary
Pressure Vessel
3 Terms and definitions
The terms and definitions defined in GB/T 19774 and GB/T 24499 and the
following ones apply to this document.
3.1
Pressure
The force acting vertically on a unit surface area of a vessel. In this Standard,
unless otherwise noted, pressure refers to gauge pressure.
3.2
Pressurized water electrolysis system for hydrogen production
A water electrolysis system for hydrogen production composed of a water
electrolyzer with a specified pressure and its auxiliary equipment, pipelines and
accessories, and enclosure, etc.
3.3
Alkaline water electrolysis system for hydrogen production
A water electrolysis system for hydrogen production composed of alkaline water
electrolyzer and its auxiliary equipment, pipelines and accessories, and
enclosure, etc.
3.4
b) It shall meet the requirements of various mechanical properties; and under
working conditions, maintain stable mechanical properties.
c) The chemical composition and metallographic structure of the selected
materials shall not cause or avoid hydrogen embrittlement.
d) The chemical composition and metallographic structure of the selected
materials shall not cause stress corrosion, cracking or oxygen corrosion
during operation.
5.2.1.4 The autoignition temperature of materials in contact with oxygen under
any conditions shall be 50 °C higher than the maximum acceptable operating
temperature.
5.2.2 Water electrolyzer
5.2.2.1 The water electrolyzer is the main equipment of the water electrolysis
system for hydrogen production. Its performance parameters will determine the
technical performance of the water electrolysis hydrogen production.
The performance parameters and structural design of the water electrolyzer
shall be based on the basic requirements of reducing the power consumption
per unit of hydrogen, reducing the manufacturing cost, and extending the
service life. The structural form of the water electrolyzer, the structure, coating
and material of the electrolysis cell and diaphragm shall be selected reasonably.
5.2.2.2 The hydrogen production capacity, purity, and impurity content of the
water electrolyzer shall be negotiated and determined in accordance with the
manufacturer’s enterprise standards and the user’s requirements.
5.2.2.3 The electrode material, coating or catalyst of the electrolysis cell of the
water electrolyzer shall be determined according to factors such as the
electrolyzer type/working parameters.
If a bipolar structure is used, the electrode is required to have good volume
conductivity. At the same time, the diaphragm shall be able to block the gas
exchange between the positive and negative compartments, to ensure the
purity of hydrogen and oxygen.
Titanium plate should be used as the plate substrate of the "electrolysis cell" in
the PEM water electrolyzer. Metal platinum can be used as a catalyst on the
negative electrode side. A ruthenium-iridium alloy or their oxide or mixture can
be used as a catalyst on the positive electrode side.
5.2.2.4 PEM water electrolyzer uses proton exchange membrane as electrolyte.
The proton exchange membrane shall have sufficient chemical stability and
a) The enclosure shall have sufficient strength, rigidity and durability, to
ensure the safety of all equipment and pipelines. The enclosure shall also
bear the stress and vibration of the hydrogen production system in the
process of transportation, installation and operation.
b) The enclosure shall be made of corrosion-resistant materials, such as
stainless steel plate or nickel-plated steel plate. Its thickness shall not be
less than 0.6 mm.
c) The insulating material of the enclosure shall be fixed by mechanical or
other appropriate methods. It shall be prevented from any form of
movement and destruction.
d) The inner surface of the enclosure shall be flat and free of hydrogen
gathering space. An exhaust port shall be set on the top. If there are
multiple spaces where hydrogen can accumulate, multiple exhaust ports
shall be provided; or vent holes shall be provided in the relevant "space".
e) At locations that are convenient for inspection and maintenance, the
enclosure shall be provided with inspection ports and maintenance ports.
The inspection ports shall be equipped with windows or cover plates.
f) A fixed hydrogen detection alarm shall be installed in the enclosure. Its
technical performance shall meet the requirements of GB 12358 and GB
16808. The hydrogen detection alarm monitors the hydrogen
concentration in the air. When reaching 0.4% (volume fraction), it shall
give an alarm and turn on the accident fan.
5.2.4.4 The enclosure shall be equipped with pipelines and accessories for
discharging the oxygen/hydrogen generated by water electrolysis to designated
outdoor areas. For small equipment, the gas can also be discharged into the
room. But at this time, an oxygen-enriched monitoring system or a hydrogen
alarm system shall be installed in the room.
5.2.5 Hydrogen tank
5.2.5.1 According to the characteristics of hydrogen use and users'
requirements for hydrogen, the hydrogen production system shall be equipped
with corresponding hydrogen tanks.
5.2.5.2 The storage capacity of the hydrogen tank shall be determined
according to parameters such as hydrogen production, characteristics of
hydrogen used, and hydrogen pressure.
5.2.6 Oxygen tank
equipped with two independent overpressure interlock protection devices, to
ensure the safe operation of the system.
5.2.9.2 The gas, discharged in the enclosure of the hydrogen production system,
shall be led to a designated outdoor area for discharge.
5.2.9.3 The set pressure of the safety valve in the pressure relief device is 1.05
times to 1.1 times the working pressure. The safety valve shall meet the
relevant requirements of GB/T 12241.
5.3 Pipelines and accessories
5.3.1 General requirements
5.3.1.1 The material selection of the hydrogen pipelines and accessories of the
water electrolysis system for hydrogen production shall meet the relevant
requirements of GB 50177. Oxygen pipelines and accessories shall meet the
requirements of GB 50030.
5.3.1.2 The setting of the pipeline support shall meet the requirements of GB
50177. Welding shall not be used between the support and the single
equipment.
5.3.2 Arrangement of pipeline accessories
5.3.2.1 The arrangement of pipeline accessories shall meet the requirements
of the process flow chart with control points for the water electrolysis system for
hydrogen production. And it shall facilitate the operation, installation and
maintenance of the water electrolysis system for hydrogen production.
5.3.2.2 For pipe sections with thermal expansion and cold contraction, during
arrangement, the flexible calculation and thermal compensation requirements
shall be combined to make proper arrangements.
5.3.2.3 The arrangement of pipelines and accessories shall be neat and orderly;
reduce unnecessary crossing. It shall pay proper attention to aesthetics.
5.3.3 Gas pipelines
5.3.3.1 The gas pipelines should be made of seamless steel pipes.
5.3.3.2 The setting of hydrogen pipelines and accessories shall comply with the
relevant regulations of GB 50177.
5.3.3.3 The setting of oxygen pipelines and accessories shall comply with the
relevant regulations of GB 50030.
5.4.1.4 The electrical facilities of the hydrogen production environment shall be
divided into zones 1 and 2 in accordance with the provisions of GB 50177. The
explosion-proof grade of electrical equipment in the explosion-hazardous area
shall be Class II, Level C, Group T1. And it shall meet the requirements of GB
3836.1 and GB/T 34542.1.
5.4.1.5 The safety interlock signal of the hydrogen production system shall cut
off the DC power supply.
5.4.1.6 The electrolysis room shall be equipped with an emergency power-off
button for the DC power supply. The button should be located in a place that is
convenient for operation.
5.4.2 Electrical grounding
5.4.2.1 Before installing the pipeline, the water electrolysis system for hydrogen
production shall be checked for grounding resistance. For water electrolyzers
connected to the positive and negative poles of the DC power supply at both
ends respectively, the resistance to ground is not less than 1 MΩ.
5.4.2.2 The flanges and valve connections of hydrogen equipment and
pipelines shall be bridged by metal (copper) connecting wires. The jumper
resistance shall be less than 0.03 Ω.
5.4.2.3 For the grounding of electrical installations, a separate grounding trunk
line shall be provided. Series connection must not be used.
5.4.2.4 The hydrogen and oxygen vent pipes shall be equipped with anti-static
grounding.
5.4.2.5 All lightning protection and anti-static grounding devices shall be tested
regularly for grounding resistance; at least once a year.
5.5 Automatic control and monitoring
5.5.1 General requirements
The hardware and software used in the automatic control and monitoring of the
water electrolysis system for hydrogen production shall be able to operate
normally under the design conditions. And it can promptly alarm and stop when
the hydrogen production system fails; and carry out corresponding emergency
treatment.
5.5.2 Automatic control and monitoring devices
5.5.2.1 Temperature sensor
After the automatic control and monitoring devices of the water electrolysis
system for hydrogen production alarm, the source of the fault shall be checked
immediately. And corresponding adjustments shall be made. When one of the
following situations occurs, the interlock shutdown shall be started:
- When the purity of hydrogen or oxygen is lower than the design lower limit;
- When the liquid level of the separator is lower than the design lower limit;
- When the system pressure is higher than the design upper limit;
- When the lye/pure water circulation volume is lower than the design lower
limit;
- When a power failure occurs;
- When the hydrogen concentration in the monitored air exceeds 1% (volume
fraction).
5.6 Assembly and installation
5.6.1 General requirements
5.6.1.1 The assembly and installation of the water electrolysis system for
hydrogen production shall be carried out in accordance with the design
documents, technical requirements or engineering design documents of the
equipment manufacturer.
5.6.1.2 The manufacturer shall provide installation instructions. These
instructions mainly include the installation requirements, safety protection,
maintenance and repair requirements for the electrolyzer and its auxiliary
equipment.
5.6.2 Installation of water electrolyzer
5.6.2.1 According to the specifications and dimensions, the water electrolyzer
can be installed in an enclosure type as a whole; or it can be installed separately.
5.6.2.2 After the water electrolyzer is assembled in the manufacturing plant, the
airtightness inspection shall be carried out according to the design documents
and technical requirements. After being qualified, it is shipped to the site for
overall installation.
5.6.2.3 According to the specification, dimension and weight of the water
electrolyzer, the hoisting and in-place plan shall be formulated. After making
sufficient preparations, install it in place.
electrolysis system for hydrogen production is assembled. It mainly checks the
appearance and various related dimensions; checks the accuracy of the
connections of various liquid and gas pipelines and electrical circuits, etc.
6.1.2 Test preparation
When testing, the entire hydrogen production system shall be assembled
according to the manufacturer's instructions. It shall be ensured that the working
conditions of the system equipment in the test and detection are the same as
the real working conditions.
6.1.3 Test working conditions
Unless otherwise specified, during test and detection, the entire hydrogen
production system shall be in design conditions.
6.1.4 Test conditions
The test and detection shall be carried out in the following environment:
a) The ambient temperature is 15 °C~35 °C;
b) The relative humidity is within the manufacturer's requirements and does
not exceed 75%;
c) There shall be no frost, dew, water seepage, rain, solar radiation, etc.
d) The hydrogen production system shall, during the whole test, be in a state
of unobstructed ventilation and exhaust.
6.2 Test
6.2.1 Electrical test
6.2.1.1 Loop impedance test
The impedance measurement test of the fault loop shall be verified in
accordance with the loop impedance test of GB/T 16895.23.
6.2.1.2 Voltage test
The electrical insulation strength shall be confirmed in accordance with GB
4793.1. The electrical insulation strength is called the dielectric strength in GB
4793.1. Unless the hydrogen production system does not require excessive
humidity pretreatment. At this time, the test voltage shall not be lower than the
provisions of GB 5226.1. The maximum test voltage shall be twice the rated
power supply voltage of electrical equipment or 1000 V, whichever is greater.
6.2.4 Differential pressure test
6.2.4.1 For the electrolysis cell of the differential pressure PEM water
electrolyzer, the differential pressure test shall be carried out under the design
conditions. The test uses pure water as the medium. The pressure shall be
separately applied to the positive or negative cell. The test pressure shall be
1.3 times the maximum operating pressure difference. At any time during the
entire test process (including pressure increase, pressure holding and pressure
relief), the pressure difference between the hydrogen and oxygen side does not
exceed the allowable pressure difference. This requirement and allowable
pressure difference shall be indicated in the product accompanying documents.
6.2.4.2 The gas in the test electrolyzer shall be drained and filled with liquid.
During the test, the observation surface of the vessel shall be kept dry.
6.2.4.3 When the metal temperature of the test electrolyzer wall is close to the
liquid temperature, the pressure can be slowly increased to the design pressure.
After confirming that there is no leakage, continue to increase the pressure to
the specified test pressure. The pressure holding time is generally not less than
30 min. Then reduce to the design pressure; hold the pressure for sufficient
time for inspection. During the inspection, the pressure shall remain unchanged.
6.2.4.4 During the test, if there is no leakage in the electrolyzer, no visible
deformation and abnormal sound, the test is qualified.
6.2.4.5 After passing the leakage test, the water electrolysis system for
hydrogen production shall slowly release the pressure.
6.3 Detection
6.3.1 Preparation before detection
6.3.1.1 The hydrogen pipeline of the water electrolysis system for hydrogen
production shall be purged and replaced. After the purging and replacement,
the oxygen content in the system shall be less than 0.5%.
6.3.1.2 The raw water, electrolyte, power supply and automatic control system
of the whole system shall meet the design requirements and meet the
requirements for startup.
6.3.1.3 The production environment of the detection site meets the design
requirements. All production auxiliary systems shall meet the conditions for
startup.
6.3.1.4 After startup, gradually increase the load until the hydrogen/oxygen
purity, working pressure, working temperature, and hydrogen production reach