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Similar standardsGB/T 43674-2024: General requirements of hydrogen fuelling stations---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/GBT43674-2024GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.010 CCS F 19 General Requirements of Hydrogen Fueling Stations Issued on: MARCH 15, 2024 Implemented on: OCTOBER 1, 2024 Issued by. State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 5 1 Scope... 6 2 Normative References... 6 3 Terms and Definitions... 9 4 Classification of Hydrogen Fueling Stations... 10 5 Hydrogen Supply Mode... 10 5.1 Basic Provisions... 10 5.2 Off-station Hydrogen Supply... 10 5.3 In-station Hydrogen Production... 12 6 Equipment and Assemblies... 13 6.1 General Requirements... 13 6.2 Hydrogen Unloading Equipment... 14 6.3 Hydrogen Compressor... 15 6.4 Hydrogen Storage Vessels... 15 6.5 Liquid Hydrogen Equipment and Accessories... 16 6.6 Hydrogen Dispenser... 18 6.7 Water Chilling Units... 19 6.8 Apparatuses and Instruments... 20 6.9 Hydraulic System and Instrument Air Supply System... 20 6.10 Hoses... 21 6.11 Valves... 21 6.12 Pipelines... 21 6.13 Safety Relief Device... 22 6.14 Venting System... 22 7 Hydrogen Quality... 23 7.1 General... 23 7.2 Hydrogen Quality Detection... 24 8 Electrical... 24 8.1 General Technical Conditions... 24 8.2 Electromagnetic Compatibility and Anti-electromagnetic Interference... 26 9 Control System... 26 9.1 Basic Requirements... 26 9.2 Emergency Stop Function... 27 General Requirements of Hydrogen Fueling Stations WARNING---this document provides technical reference for hydrogen fueling stations. The requirements for the approval, construction, acceptance and operation of hydrogen fueling stations shall be subject to the relevant provisions of laws, regulations and mandatory national standards.1 ScopeThis document specifies the classification, hydrogen supply mode, equipment and assemblies, hydrogen quality, electrical, control system, delivery information, testing, signs and nameplates, operation management, inspection and maintenance requirements of hydrogen fueling stations. This document applies to hydrogen fueling stations that fuel with gaseous hydrogen. Hydrogen fueling facilities for hydrogen-powered ships, trams, aircraft, engineering vehicles and power generation equipment, etc. may also refer to this document for implementation.2 Normative ReferencesThe 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 2893.5 Graphical Symbols - Safety Colors and Safety Signs - Part 5.Principles and Requirements for the Use of Safety Signs GB 2894 Safety Signs and Guideline for the Use GB(/T) 3836 (all parts) Explosive Atmospheres GB/T 3836.15-2017 Explosive Atmospheres - Part 15.Electrical Installations Design, Selection and Erection GB/T 9574 Rubber and Plastics Hoses and Hose Assemblies - Ratios of Proof and Burst Pressure to Maximum Working Pressure GB/T 10543 Rubber Hoses and Hose Assemblies for Aircraft Ground Fueling and Defueling - Specification GB 12158 General Guideline for Preventing Electrostatic Accidents GB/T 12241 Safety Valves - General Requirements GB/T 12325 Power Quality - Deviation of Supply Voltage HG 20202 Code for Construction and Acceptance of Degreasing Project JJG 52 Elastic Element Pressure Gauges, Pressure-vacuum Gauges and Vacuum Gauges for General Use JJG 693 Alarmer Detectors of Combustible Gas NB/T 10354 Tube Trailer NB/T 10355 Tube Skid Container SH/T 3503 Specification on Handover Technical Documentation for Petrochemical Construction Projects SH/T 3543 Specification on Technical Documentation for Construction Process of Petrochemical Construction Projects SH/T 3903 The Project Supervision Specification on Petrochemical Construction Work SH/T 3904 Regulation for Acceptance of Completed Construction Projects in Petrochemical Industry ISO 19880-5 Gaseous Hydrogen - Fueling Stations - Part 5.Dispenser Hoses and Hose Assemblies3 Terms and DefinitionsThe terms and definitions defined in GB/T 24499, GB/T 29729, GB/T 31138, GB 50156 and GB 50516 and the following are applicable to this document. 3.1 hydrogen quality The product quality of hydrogen and liquid hydrogen. NOTE. it usually includes hydrogen purity and impurity content in hydrogen. 3.2 hydrogen unloading cabinet Specialized equipment that connects tube trailers for gaseous hydrogen / tube skid containers for gaseous hydrogen, and has functions such as gas discharge, emergency cut-off, purging and venting, etc. 3.3 hydrogen-contacting equipment Equipment that uses hydrogen or liquid hydrogen as the medium.4 Classification of Hydrogen Fueling Stations4.1 In accordance with the hydrogen supply mode, they can be classified into. in-station hydrogen production and hydrogen fueling stations, and off-station hydrogen supply and hydrogen fueling stations. 4.2 In accordance with the operation mode, they can be classified into. self-use hydrogen fueling stations and commercial hydrogen fueling stations. 4.3 In accordance with the pressure level of the service object, they can be classified into. 35 MPa level and 70 MPa level. 4.4 In accordance with the integration mode of the main in-station equipment, they can be classified into. mobile hydrogen fueling facilities and fixed hydrogen fueling stations. NOTE. mobile hydrogen fueling facilities are skid-mounted hydrogen fueling equipment in which the equipment, assemblies and frames are integrated and fixed on the chassis, which is convenient for transportation, simple installation and use on site.5 Hydrogen Supply Mode5.1 Basic Provisions Hydrogen fueling stations may supply hydrogen through tube trailers for gaseous hydrogen transportation, tube skid containers for gaseous hydrogen transportation, lorry trucks for liquid hydrogen transportation, tank containers for liquid hydrogen transportation, pipeline transportation or in-station hydrogen production. 5.2 Off-station Hydrogen Supply 5.2.1 Hydrogen supply through tube trailers / tube skid containers for gaseous hydrogen 5.2.1.1 Hydrogen fueling stations may supply hydrogen through tube trailers / tube skid containers. Tube trailers / tube skid containers can discharge hydrogen into hydrogen storage vessels in hydrogen fueling stations and directly leave, and they can also be used as hydrogen storage vessels in the hydrogen fueling stations. 5.2.1.2 The tube trailers for gaseous hydrogen shall comply with the requirements of NB/T 10354; tube skid containers for gaseous hydrogen shall comply with the requirements of NB/T 10355 and shall comply with GB 50516 and the relevant provisions on special equipment. 5.2.1.3 The hydrogen unloading operation area of the tube trailers / tube skid containers shall be flat, and the semi-trailer’s outriggers shall be supported to ensure safety and stability in the parking state; at the same time, a horse stool shall be used for auxiliary support, and it shall be away from vegetation, debris and flammable materials. 5.2.2.6 The unloading operation area of lorry trucks / tank containers for liquid hydrogen shall be equipped with a limit device. NOTE. the limit device usually includes a limit rod, a limit baffle, a parking block / similar object. 5.2.2.7 Parking spaces shall be set in the unloading operation area of lorry trucks / tank containers for liquid hydrogen, and shall comply with the requirements specified in GB 50516. 5.2.2.8 The unloading operation area of lorry trucks / tank containers for liquid hydrogen shall be away from any hydrogen storage vessels and high-pressure pipeline systems that may cause jet flames due to leakage, including tube trailers / tube skid containers, etc.; the hydrogen storage vessels and pipelines shall not be set at the downwind outlet of cold hydrogen discharge for purging, etc. 5.2.3 Hydrogen supply through pipeline 5.2.3.1 The following ports should be included between the off-site hydrogen pipeline and the hydrogen fueling stations. a) Emergency and maintenance isolation; b) Safety pressure relief; c) Purging, replacement and sampling; d) Pressure and (or) flow regulation; e) Measuring instruments; f) Filtering or purification equipment. 5.2.3.2 The port between the off-site hydrogen pipeline and the hydrogen fueling stations is generally located inside the hydrogen fueling stations. 5.2.3.3 The connecting pipeline system between the off-site hydrogen pipeline and the hydrogen fueling stations shall be reasonably equipped with valves and pipe fittings for pipeline access, reasonably arranged pipelines, reasonably designed hydrogen flow rate, and construction acceptance tests shall be carried out in accordance with the provisions. 5.2.3.4 The connecting pipeline system between the off-site hydrogen pipeline and the hydrogen fueling stations shall comply with the requirements of GB 50177, GB 50156 and GB 50516. 5.3 In-station Hydrogen Production The appropriate hydrogen production technology shall be selected based on the scale, safety, continuity of hydrogen supply, economic efficiency, energy consumption and energy efficiency, carbon emission management, etc. of the hydrogen fueling stations. In-station hydrogen production shall comply with the requirements of GB 50516, GB 50177 and GB/T 34584, etc.6 Equipment and Assemblies6.1 General Requirements 6.1.1 Hydrogen-contacting equipment shall be equipped with a safety relief device, nitrogen or helium purging and replacement system. 6.1.2 Before being put into use, hydrogen-contacting equipment shall be safely and effectively purged with oil-free high-purity clean nitrogen to ensure that all particulate matters and organic pollutants are removed before the device is started. 6.1.3 After the hydrogen-contacting equipment passes the purging, it shall be replaced with oil- free high-purity clean nitrogen, until the oxygen content is less than 0.5%; at the same time, the hydrogen pipeline system shall also be filled with nitrogen to maintain pressure, and the pressure shall not be less than 0.2 MPa. 6.1.4 Before officially starting the fueling operation, it shall be ensured that the quality of the hydrogen fueled meets the requirements specified in GB/T 37244. 6.1.5 The hydrogen pipeline system shall be equipped with automatic and manual emergency shut-off valves to facilitate the isolation of different parts of the pipeline system in case of emergency or maintenance. 6.1.6 Manual shut-off valves or exhaust valves shall be installed in a convenient position, so that hydrogen can be cut off in time when necessary. 6.1.7 Valves, instruments and other assemblies that require maintenance shall not be directly laid underground. 6.1.8 All assemblies that require regular maintenance should be easy to maintain and adjust on site. 6.1.9 All parts that may be touched by staff or maintenance personnel should not have sharp protrusions or edges. 6.1.10 During disassembly and installation, equipment and assemblies shall not affect each other. 6.1.11 Before maintaining hydrogen-contacting equipment, the hydrogen supply shall be cut off through isolation measures, and identification plates shall be set up, and the requirements specified in GB 50516 shall be met. 6.1.12 When hydrogen-contacting equipment is regularly maintained and repaired, measures shall be taken to prevent pipeline contamination. 6.2.2.3 Unloading operators shall wear personal protective equipment and use tools that do not generate any static sparks. Before unloading operations, check whether the pipelines, valves and safety accessories, etc. of the lorry trucks / tank containers for liquid hydrogen are intact, and confirm the position of the emergency stop switch and the emergency operation mode. 6.2.2.4 Unloading operations shall not be carried out in severe weather, for example, thunderstorms, to prevent static sparks and fires. 6.2.2.5 Liquid hydrogen unloading shall use vacuum conveying hoses with dust protection measures. Keep the hoses clean, check the appearance for damage and wear on the ports, and ensure reliable sealing at both ends. Before liquid hydrogen unloading, it shall be ensured that the connecting valves of the conveying hose and the in-station liquid hydrogen storage pressure vessels have been thoroughly purged and replaced with hydrogen and cooled with liquid hydrogen. 6.2.2.6 After the unloading is completed, the residual liquid hydrogen in the liquid hydrogen conveying hose shall be purged to the safe unloading system of the hydrogen fueling stations, and the conveying hose shall be purged, replaced and re-warmed. The conveying hose can only be disconnected after completion. 6.2.2.7 During the purging and cooling process of the conveying hose before unloading and the purging and re-warming process of the hose after unloading is completed, the vehicle engine shall be turned off and the surrounding conditions shall be closely observed to prevent danger during the discharge of cold hydrogen. 6.3 Hydrogen Compressor 6.3.1 General requirements 6.3.1.1 The hydrogen compressor shall comply with the requirements specified in GB 50516 and GB 50156. 6.3.1.2 Potential risks shall be assessed for the installation, operation and maintenance of the hydrogen compressor, and corresponding risk control measures shall be formulated. 6.3.2 Vibration and displacement 6.3.2.1 The compressor should be equipped with vibration and displacement sensors. 6.3.2.2 Vibration and displacement compensation shall be performed on the connections between the hydrogen pipeline and the compressor inlet and exhaust port. 6.4 Hydrogen Storage Vessels 6.4.1 The hydrogen storage vessels for hydrogen fueling stations shall comply with GB 50516, GB 50156 and the relevant provisions on special equipment. 6.4.2 Potential risks shall be comprehensively assessed for the layout, installation, operation and maintenance of hydrogen storage vessels and their pipelines for hydrogen fueling stations, and corresponding risk control measures shall be formulated. 6.4.3 The hydrogen storage vessels for hydrogen fueling stations shall be equipped with safety relief devices. 6.4.4 Accumulation of flammable liquids under the hydrogen storage vessels for hydrogen fueling stations shall be prevented. 6.5 Liquid Hydrogen Equipment and Accessories 6.5.1 General requirements 6.5.1.1 Liquid hydrogen storage pressure vessels shall comply with GB 50516, GB 50156 and the relevant provisions on special equipment. 6.5.1.2 The materials of equipment and components and parts used for storing and conveying liquid hydrogen and cryogenic hydrogen shall have good hydrogen compatibility. 6.5.1.3 The base or support of the liquid hydrogen storage pressure vessels shall be made of non-combustible materials that can withstand the low temperature damage caused by liquid hydrogen leakage, and the base or support shall have sufficient fire resistance. 6.5.1.4 The support and foundation of the liquid hydrogen storage pressure vessels shall prevent liquid hydrogen or other liquid fuels from accumulating under the vessels. 6.5.2 Cryogenic valves, pipelines and pipe fittings 6.5.2.1 Valves, pipelines and pipe fittings used at low temperatures shall comply with the requirements specified in GB 50156, GB 50516 and GB/T 29729. 6.5.2.2 Pipelines and equipment that operate below the air condensation temperature without thermal insulation measures shall not be installed on the surface of asphalt or other combustible materials, and a fixed liquid collection tray can be installed below. 6.5.3 Safety relief device 6.5.3.1 Liquid hydrogen storage pressure vessels and related equipment shall be equipped with a combined safety relief device, including a combination of a full-open safety valve and a full- open safety valve, and a combination of a full-open safety valve and a bursting disc to prevent overpressure. 6.5.3.2 The safety relief device shall comply with the requirements specified in GB 50156, GB 50516 and GB/T 29729. 6.5.3.3 A safety relief device shall be installed at the liquid hydrogen retention point to prevent the risk of overpressure caused by thermal expansion, and shall comply with the requirements specified in GB 50156. 6.5.6.1 All liquid hydrogen-related vent pipes with the same discharge pressure (including vent pipes for safety relief devices and purging and replacement devices) shall be connected to a centralized vent pipe. 6.5.6.2 The liquid hydrogen vent pipe shall not be connected to the vent pipes of other non- liquid hydrogen equipment to prevent hydrogen from flowing back into the liquid hydrogen pipeline. The venting system of the liquid hydrogen storage pressure vessel should be independently set up and should not be connected to the venting system of the high-pressure hydrogen pipeline, liquid hydrogen booster pump and hydrogen compressor. 6.5.6.3 The venting pipeline of cryogenic hydrogen shall not be equipped with thermal insulation measures to enable the cryogenic hydrogen to exchange heat with the environment to the maximum extent, so as to reduce the possibility of flammable vaporous clouds during the discharge process. The design of the venting pipeline of cryogenic hydrogen shall not limit the expansion and contraction caused by temperature changes. 6.5.6.4 When multiple venting pipelines are connected to the centralized vent pipe, measures shall be taken to avoid the dangers of hydrogen reflux and leakage during maintenance or replacement of valves. 6.5.6.5 The centralized vent pipe shall not be equipped with any components that may hinder the flow of hydrogen and any devices that may cause ice blockage or blockage of the pipeline. A drain outlet shall be set at the bottom of the centralized vent pipe, and drainage shall be regularly carried out to prevent rain, snow, etc. from blocking the drain outlet. 6.5.7 Purging and replacement After the liquid hydrogen device is qualified in purging, helium or room-temperature hydrogen should be used for purging and replacement. 6.5.8 Layout of liquid hydrogen storage pressure vessels 6.5.8.1 The liquid hydrogen storage pressure vessels shall be installed in a well-ventilated location. 6.5.8.2 The liquid hydrogen storage pressure vessels shall be as close as possible to the unloading control device. 6.5.8.3 The outlet pipeline of the liquid hydrogen storage pressure vessels shall be successively equipped with a manual shut-off valve (for example, a stop valve or a ball valve, etc.), an emergency shut-off device, a third valve or a loading and unloading joint from the vessel to the outside. 6.6 Hydrogen Dispenser 6.6.1 The hydrogen dispenser shall comply with the requirements specified in GB/T 31138. 6.6.2 The fueling protocol shall comply with the requirements specified in GB/T 42855. 6.6.3 Under different initial conditions and environmental conditions, the hydrogen dispenser shall select an appropriate fueling rate, and the maximum flow rate should be determined in accordance with the volume of the on-board hydrogen storage system and the target fueling time. 6.6.4 When the pressure of the hydrogen fueling pipeline drops for unknown reasons, the hydrogen dispenser shall take measures to prevent hydrogen leakage from causing safety hazards. 6.6.5 If the hydrogen dispenser uses a programmable controller for fueling control, a controller fault detection device shall be configured. 6.6.6 The hydrogen dispenser should be equipped with an inclination or vibration sensor. 6.6.7 The hydrogen dispenser discharge system shall be equipped with a port for venting the hydrogen sampling device. 6.6.8 The hydrogen fueling gun, hydrogen fueling hose and hydrogen dispenser shall be reliably connected and have good conductivity. 6.6.9 The hydrogen dispenser should take protective measures to prevent unauthorized use. 6.6.10 All components in the hydrogen dispenser shall be connected to the same potential and grounded. The grounding resistance of the hydrogen dispenser shall meet the requirements of GB 50516.The total grounding resistance of the hydrogen dispenser shall be less than 10 . 6.6.11 When the hydrogen dispenser is in standby mode, the hydrogen fueling hose and hydrogen fueling gun shall be placed within the anti-collision protection range. 6.6.12 Protective measures should be set to prevent the hydrogen fueling hose from directly contacting the ground and to prevent the hose from being excessively bent. 6.6.13 Measures shall be taken to prevent the accumulation of environmental substances, such as snow, ice, and sand on the hydrogen fueling gun. 6.7 Water Chilling Units 6.7.1 Water chilling units should be used as cooling facilities for the hydrogen fueling stations. The water chilling units shall be able to adapt to outdoor environments and meet the requirements for rain, dust and snow protection. The overall protection degree of the equipment shall not be lower than IP55. 6.7.2 The water chilling units should be skid-mounted, with integrated water pumps and water tanks, and the mode of air cooling should be used. The head of the water pump shall be able to meet the demands of water circulation and should not be lower than 30 m. 6.7.3 The water chilling units should be non-explosion-proof models and installed beyond hazardous explosion areas. If installed in the hazardous explosion areas, the water chilling units 6.10 Hoses 6.10.1 The design pressure of the hydrogen hoses shall be 1.3 times the nominal working pressure, and the minimum burst pressure shall be 4.0 times the nominal working pressure. NOTE. hydrogen hoses include hydrogen unloading hoses and hydrogen fueling hoses. 6.10.2 The inner tube of the hydrogen hoses shall be made of a material with good hydrogen compatibility, and polytetrafluoroethylene (PTFE) shall not be used. 6.10.3 The inner surface of the hydrogen hoses and the sealing surface of the joints shall be smooth and cleaned with high purity. In accordance with the requirements specified in HG 20202, compatible cleaning solvents shall be used, and ultrasound should be combined to remove traces of grease, combustible materials and particles, and the surface oil content shall not exceed 120 mg/m2. 6.10.4 Hydrogen hoses shall have static conductivity and meet the requirements specified in GB 12158. 6.10.5 Hydrogen hoses shall have product certificates (indicating quantity and inspection mark, inspection date), product instructions and packing lists, etc. The product model, name, working pressure, joint type and inner diameter parameters, trademark, manufacturer name, factory address, standard serial No., manufacturing date (or batch number) shall be indicated. If spare parts are provided, there shall also be a spare parts list. 6.10.6 Hydrogen hoses shall be prevented from excessive twisting during use. 6.10.7 Both ends of the hydrogen unloading hose shall be equipped with anti-swing ropes / anti- collapse and detachment chains. 6.10.8 Hydrogen unloading hoses shall be equipped with protective measures. 6.10.9 Hydrogen fueling hoses shall meet the requirements of ISO 19880-5.Hydrogen fueling hoses shall not have cuts, cracks, bulges, bubbles, or twists. Once found, they shall be immediately stopped from being used. 6.11 Valves 6.11.1 Hydrogen valves used in the hydrogen fueling stations shall comply with the requirements of GB/T 42177, GB 50516 and GB 50156. 6.11.2 Safety valves shall comply with the requirements of GB/T 42177 and GB/T 12241. 6.12 Pipelines 6.12.1 Hydrogen pipelines in the hydrogen fueling stations shall comply with the requirements of GB/T 14976, GB 50177, GB/T 29729, GB 50516 and GB 50156, and shall meet the expected cycle life requirements. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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