Report on certification requirements: certification instruments to facilitate the acceptance by safety and permitting authorities (D2.3)

D2.3 Report on certification requirements: certification instruments to facilitate the acceptance by safety and permitting authorities Ref. Ares(2024)3888656 - 30/05/2024 D 2.1 Report on safety requirements DELIVERABLE TYPE Report MONTH AND DATE OF DELIVERABLE Month 12, 31/05/2024 WORK PACKAGE WP 2 LEADER ENVI DISSEMINATION LEVEL Public AUTHORS Mattia Miglietta PROGRAMMA HORIZON EUROPE GRANT AGREEMENT 101111933 START Jun.2023 DURATION 24 Months 3 Contributors NAME ORGANISATION María Panadero Gema Rodado CNH2 Marek Kruszewski Magdalena Raczyńska Żaneta Kłostowska RIGP Simon Habran TWEED Miroslava Tzekova Vasimir Radulov BH2C Peer Reviews NAME ORGANISATION María Panadero Gema Rodado CNH2 Ilaria Schiavi ENVI Revision History The information and views set out in this report are those of the author(s) and do not necessarily reflect the official opinion of the European Union, neither the European Union Institutions and Bodies nor any person acting on their behalf. VERSION DATE REVIEWER MODIFICATIONS V1 29/05/2024 María Panadero (CNH2) MODIFICATIONS V2 30/05/2024 Ilaria Schiavi (ENVI) FINAL REVIEW 4 Index of Contents 1 Introduction ................................................................................................................................................. 8 2 CE Marking for Hydrogen Technologies ............................................................................................... 9 2.1 Introduction: the CE Marking mechanism ..................................................................................... 9 2.2 Applicable EU Directives ................................................................................................................ 11 2.2.1 ATEX 114 « equipment » Directive...................................................................................................... 12 2.2.2 The Machinery Directive ....................................................................................................................... 15 2.2.3 The Pressure Equipment Directive ...................................................................................................... 16 2.2.4 The Low Voltage Directive .................................................................................................................... 19 2.3 Standardization activities of Technical Committees and new approaches for Certification 19 3 Evidences of Certification Requirements application for H2 Projects ......................................... 25 3.1 Certification requirements for Innovative FCH technology: EVERYWH2ERE project ...... 25 3.2 Protocol for electrolysers conformity: a general approach from Notified bodies .............. 27 3.3 Hydrogen technologies and vehicles homologation in railway sector .................................. 29 3.4 Technical standards for mobility: Hydrogen Refuelling Stations (HRS) and FCEVs ........... 30 3.5 Hydrogen production and use for micro-grid/off grid remote areas: the experience of the REMOTE project ........................................................................................................................................... 32 4 Conclusions ................................................................................................................................................ 33 5 Appendix A ................................................................................................................................................. 36 5.1 Italy ...................................................................................................................................................... 36 5.2 Spain .................................................................................................................................................... 39 Index of Tables Table 1 Modules required under EU Directives for CE marking ............................................................. 10 Table 2 EU Directives for CE marking of Hydrogen technologies .......................................................... 12 Table 3 Examples of Harmonised standards under ATEX Directive for electrolysers, storage systems and fuel cells ....................................................................................................................................... 13 Table 4 Examples of Harmonised standards under Machinery Directive ............................................. 16 Table 5 Correlation between modules needed for the conformity assessment and hazard category of the Pressure Equipment .............................................................................................................................. 18 Table 6 Examples of Harmonised standards under Pressure Equipment Directive for hydrogen technologies above 0,5 bar ............................................................................................................................. 19 Table 7 Standards for Fuel cell design and installation considered in EVERYWH2ERE project....... 26 Table 8 Standards for storage system (bundles) considered in EVERYWH2ERE project .................. 27 Table 9 Technical standards for Electrolysers (evidence from Bulgaria) ............................................... 28 Table 10 Standards and standards proposals for H2-fuelled trains (Italian official guidelines) ........ 29 Table 11 Technical standards and technical reports for HRS (evidence from Poland) ....................... 31 Table 12 Cross standardization activity between UNI and CTI ............................................................... 36 5 Index of Figures Figure 1 PS-V diagram for categorization of Pressure Equipment ......................................................... 17 Figure 2 PSDN diagram for categorization of Pressure Equipment ..................................................... 18 Figure 3 Example of test on site for EVERYWH2ERE Genset with bundles ........................................ 25 Figure 4 Genset block diagram from Deliverable 3.8 of EVERYWH2ERE project .............................. 26 Figure 5 “Roadmap on hydrogen standardization” document published by the European Clean Hydrogen Alliance ............................................................................................................................................. 35 6 Partners short names ENVI Parco Scientifico Tecnologico Per L’ambiente Environment Park Torino Spa IMI Institute For Methods Innovation IME Fundacion IMDEA Energia APRE Agenzia per la Promozione della Ricerca Europea CNH2 Centro Nacional Del Hidrogeno RIGP Regionalna Izba Gospodarcza Pomorza CLUSTER TWEED Cluster Tweed BH2C Balkanski Vodoroden Klaster Abbreviations BOP Balance of Plant CEI Comitato Elettrotecnico Italiano EEA European Economic Area FCEV Fuel Cell Electric Vehicles JTC Joint Technical Committee SAE Society of Automotive Engineers PED Pressure Equipment Directive P2G Power-to-Gas P2P Power-to-Power TC Technical Committee TPED Transportable Pressure Directive WI Working Item 7 Executive Summary This deliverable serves as an exploration of certification requirements for hydrogen technologies throughout Europe. It is structured to provide information to stakeholders—from policymakers to technology manufacturers and early adopters—in understanding and navigating the current landscape of certification for safety and permitting to promote hydrogen technology adoption. This will serve as a basis for discussion in the next phase of the project, which will culminate in the drafting of Guidelines on the subject. Key points of the deliverable are: • Hydrogen Technology Certification: the deliverable details the crucial EU directives for hydrogen technology certification, emphasizing the CE Marking process and the associated compliance requirements with European safety, health, and environmental standards; • Standardization Activities: It reviews ongoing standardization efforts by various technical committees, focusing on establishing a supportive framework for hydrogen technologies. The activities of standardization bodies like CEN, CENELEC, ISO, and SAE are highlighted; • Sector-Specific Applications: The document elaborates on certification requirements specific to different sectors such as mobility (particularly railway and road sectors) and residential applications, alongside examples from demonstrative and real projects. The deliverable synthesizes data from consortium experiences and stakeholder engagement activities, providing an overview of current standards and anticipated changes. It emphasizes the dynamic nature of standardization in hydrogen technologies, noting particular progress in safety and technology certification standards which are evolving to accommodate new market demands and innovations. 8 1 Introduction HYPOP project aims to raise public awareness and trust towards hydrogen technologies and their systemic benefits. To do this, stakeholders’ engagement is a pivotal aspect that has been taken into account for this project. Work package 2 (WP2) methodology involves tools to gather information from stakeholders through surveys, interviews and participation to events (engagement activity useful also for WP1). WP2 activities are crucial to provide the basis for the final guidelines that will support decision makers in introducing hydrogen in the local communities and economies. Specifically, technical data gathered about safety, permitting and certification requirements will be used for the workshops that will involve HYPOP’s stakeholders and thus providing decision makers with valuable information coming from sharing real experiences and technical know-how. The research activity for D2.3 has covered the HYPOP countries of the partners involved in WP2 (Italy, Spain, Poland, Belgium and Bulgaria). To compile D2.3 “Certification requirements”, HYPOP’s partners have cooperated to provide the best overview of the certification requirements needed for hydrogen technologies throughout Europe according to consortium experiences and data gathered through stakeholder engagement activities (see D5.4). HYPOP partners gathered information about demonstrative and real projects (D2.1, D.2.2 and D5.4), while references to certification protocols, directives followed and technical standards applied have been reported in this deliverable. The deliverable introduces the three main directives for certification of hydrogen technologies - ATEX, Machinery and Pressure Equipment. Concrete examples have been provided to support early adopters of H2 technologies that want to understand how to pursue certification of innovative hydrogen technologies as well as for the decision maker on safety and permitting aspects to increase their awareness. Other EU Directives may apply and be relevant to the CE marking of the hydrogen technologies put on the market (a not comprehensive list is provided in Section 2.1 together with the details of the aforementioned ones). Subsequently, the advance in hydrogen-related standards development is provided. The deliverable lists the main topics on which technical committees of the standardization bodies are working currently, to provide an overview of the framework of the next standards that will support hydrogen technologies deployment. As an added value, new standard proposals and revisions of existing ones from technical committees for hydrogen technologies are reviewed. A specific focus on the activities of one of the two main standardization bodies in Italy, UNI, has been made (Appendix A). Finally, some examples of the application of standards in different sector has been given. Useful references to official material like reports and scientific papers are made along the text to complement the information on standardization framework. 9 2 CE Marking for Hydrogen Technologies 2.1 Introduction: the CE Marking mechanism The commercialization of products within the European single market is governed by a set of regulations and Directives aimed at ensuring consumers that products meet minimum requirements in terms of safety, health, and environmental protection. Products, regardless of their place of production, must comply with EU requirements and can be marketed within its market only if they bear the CE marking. The CE Marking signify that products sold in the EEA have been assessed to meet high safety, health, and environmental protection requirements, i.e., it conforms to EU regulatory framework on those areas. Manufacturers have the responsibility to carry out the conformity assessment which generally requires the preparation of a technical file demonstrating the product's compliance with all relevant requirements at the European level and the drafting and signing of a Declaration of conformity. In some cases, where the risks to public health, safety and environment are higher, the product's conformity assessment may need to be conducted by a nationally recognized Notified Body that will follow the evaluation procedure provided for by the specific legislation of the product subject to the certification process. Hydrogen technologies must comply with various directives and regulations which, depending on the type, may require the involvement of a notified body. Notified Bodies, as defined by European law, are entities who are granted authority by national authorities to certify a product according to a specific European standard for CE Marking. They may be supported by accreditation bodies. Notified bodies may also be involved in the surveillance phase of products at the national and European level, and can remove a product from the market, even if certified with the CE mark, if deemed risky for common health. Notified bodies are authorized to issue the "EU Type Examination" certificate and to carry out all or some of the phases of the conformity assessment. Manufacturers can prove compliance to the certification requirements according to the associated regulations/directives and the voluntary technical standards through documentation to be provided to the Notified Body and contained in specific modules. The conformity assessment procedures are mainly composed by two phases: • Design assessment phase where tests and studies are conducted (relevant for prototypes and samples). Modules that refer to this phase are: A, B, G, H. Different modules deriving from these can be required according to the specific directive considered (e.g., Module A1, A2…); • Production assessment phase for the control of production quality (relevant for product units). Modules that refer to this phase are: A, C, D, E, F, G, H. Different modules deriving from these can be required according to the specific directive considered (e.g., Module D1 …). An overview of the modules and their content that may be requested for hydrogen technologies is provided below. Module A: Internal production control. The manufacturer provides the competent authorities with technical documentation containing information for the evaluation of the product's conformity to the Directives it must comply with. Some examples of the information required in the technical 16 Generally, the Machinery Directive allows for internal testing even if the product falls within the Directive's list, provided that the tests conform to a harmonized European standard that includes all relevant health and safety requirements. Moreover, the manufacturer of hydrogen technologies like compressors and pumps should provide technical documentation including a general description of the machine, documentation related to risk assessment, references to applied standards and technical specifications, and technical reports with results of internal tests conducted (analogy to Module A conformity assessment). The harmonized standards should be used as a reference to comply with minimum requirements under Machinery Directive 2 . Some examples of the harmonised standards are: Table 4 Examples of Harmonised standards under Machinery Directive Harmonised standards for Machinery Directive EN ISO 12100:2010 Safety of machinery - General principles for design - Risk assessment and risk reduction EN 1127-1:2019 Explosive atmospheres – Explosion prevention and protection - Part 1: Basic concepts and methodology EN ISO 13849-1:2023 Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design EN ISO 13849-2:2012 Safety of machinery - Safety-related parts of control systems - Part 2: Validation EN ISO 19353:2019 Safety of machinery - Fire prevention and fire protection 2.2.3 The Pressure Equipment Directive A third Directive applicable for the certification of hydrogen technologies identified from the analysis of projects and stakeholders’ engagement is the Pressure Equipment Directive 2014/68/EU (PED Directive). This Directive falls within a broader framework that also includes the Simple Pressure Vessels Directive 2014/29/EU and the Transportable Pressure Equipment Directive 2010/35/EC. This legislation is primarily considered for the certification of hydrogen storage systems but generally also addresses other hydrogen technologies such as electrolysers and fuel cells, as they are technologies for which there is a risk related to maximum pressures allowed exceeding 0.5 bar above atmospheric pressure. As with the Machinery Directive, in this case, the conformity assessment procedure leading to the Declaration of Conformity and CE Marking can be performed directly by the manufacturer if the hydrogen technology is category I. For pressure equipment of category II, III, and IV, the involvement of a notified body is required. Involving a Notified Body increases the complexity of the assessment procedure and the safety conditions ensured as well. Specifically, the number of modules with the information to be provided and the assessment procedures grows with the associated risk of the pressure equipment. Only for products of category I, the conformity assessment can be carried out by the manufacturer according to internal production control protocols (Module A). 2 Harmonised standards for Machinery Directive: https://ec.europa.eu/docsroom/documents/55576) 17 The classification of product into increasingly hazardous categories going from category I to IV is based on the criteria outlined in the related Annexes of the Directive. Specifically, for classification into the four categories mentioned, the following factors are considered: • The maximum allowable pressure of the container holding the fluid (PS); • The container's own volume (V) or nominal size (DN) in case of pipes; • The fluid's group classification. Generally, gaseous hydrogen falls into group 1 as it is a flammable gas of category 1 and 2 (Gases that, at a temperature of 20 °C and a normal pressure of 101.3 kPa): o a) are flammable when mixed at 13% or less (by volume) with air; or o b) have a flammability range with air of at least 12 percentage points, regardless of their lower flammability limit as defined by Table 2.2.1 of EC Regulation n.1272/2008. It is important to consider the technical requirements that apply to containers intended to hold gases whose vapour pressure at the container's maximum allowable temperature is at least 0.5 bar above the normal atmospheric pressure. In this case, for fluid groups of type 1 when the container's volume is more than 1 litre and the PS-V product exceeds 25 bar-L, and when the PS pressure is over 200 bar, the provisions of Annex II apply (Figure 1). Figure 1 PS-V diagram for categorization of Pressure Equipment The following references are made specifically to hydrogen storage systems: • Solid storage in metal hydrides where the operating pressure is about 30 bar. Depending on the storage’s own volume, these systems can fall into categories ranging from category I upwards; • For hydrogen gas storage systems at 200 bar, regardless of the storage's own volume, the reference category can be III or IV. Other hydrogen technologies such as electrolysers and fuel cells must also meet the requirements of the PED regulation and can be connected to the storage system and to each other through piping, which is also defined by the regulation as pressure equipment where the maximum allowable pressure can be above 0.5 bar. In the case of pipes intended to contain gas whose vapour pressure at the maximum allowable temperature is above 0.5 bar of normal atmospheric pressure (1013 mbar), for group 1 fluids, 18 when the Nominal Size (DN) is greater than 25, the provisions reported in Annex II apply (Figure 2). Figure 2 PSDN diagram for categorization of Pressure Equipment The conformity assessment procedures to be applied for the different categories are as follows (Table 5): Table 5 Correlation between modules needed for the conformity assessment and hazard category of the Pressure Equipment Category Modules I Module A II Modules A2 (analogous in terms of content to Module A with the addition of official checks on pressure equipment conducted at random and unannounced intervals by the notified body), D1 (quality assurance of the production process), E1 (Quality assurance of final product inspection and testing) III Modules B (EU type-examination of design) + D, Modules B (EU typeexamination of design) + F, Modules B (type of production) + E, Modules B (EU type-examination of production) + C2 (conformity to type based on internal production control combined with testing of pressure equipment under official control at random intervals), Module H (conformity based on full quality assurance); IV Modules B (type of production) + D, Modules B (type of production) + F, Module G, Module H1 (conformity based on full quality assurance with design control). Compared to Module B EU type-examination of design, EU type-examination of production adds the examination of a specimen, representative of the production envisaged, of the complete pressure equipment. Except for Category I, all other cases, where a hydrogen technology falls within Categories II, III, IV, must involve a Notified Body to certify a hydrogen technology (electrolysers, storage systems of different type, pipes etc…) according to the PED Directive and within the national territory of interest. Harmonised standards set the minimum requirements that need to be fulfilled by the 19 manufacturers as they will be the base of the conformity assessment carried out by Notified Bodies 3 . Some examples of the harmonised standards can be: Table 6 Examples of Harmonised standards under Pressure Equipment Directive for hydrogen technologies above 0,5 bar Harmonised standards for Pressure Equipment Directive EN 1349:2009 Industrial process control valves EN 13445 1to -5 :2021 Unfired pressure vessels (General; Design; Materials; Fabrication; Inspection and Testing) EN 13480-2:2017 Metallic industrial piping 2.2.4 The Low Voltage Directive The last Directive associated to hydrogen technologies is the Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits. It applies to electrical equipment designed for use with a voltage rating of between 50 and 1 000 V for alternating current and between 75 and 1 500 V for direct current. For this reason, it is applicable to most of the hydrogen systems and technologies. In fuel cells, for example, voltage for alternating current is around 200 to 450 V according to the size of the technology. These products shall comply to the requirements described in the Directive to ensure public safety from physical injury, temperatures and radiation. Manufacturers do not need to involve a Notified Body in the conformity assessment. It is only required to comply with the information required in the Module A for the Internal production control. Specifically, technical documentation should contain (as an example): a general description of the electrical equipment; conceptual design and manufacturing drawings and schemes of components, sub-assemblies, circuits, etc.; a list of the harmonised standards 4 applied in full or in part; results of design calculations made, examinations carried out, etc.; and test reports. 2.3 Standardization activities of Technical Committees and new approaches for Certification Standardization bodies are involved in the development of international standards and thus play a crucial role in the market uptake of innovative technologies or commercial technologies approaching new sectors. In the previous paragraph, standards have been often referred to, as they support the certification process and contribute to ensuring public safety, health and environmental protection. The aim of this paragraph is to show current and foreseen standards around hydrogen technologies supporting the compliance with the certification requirements of the regulatory framework analysed in D2.1 and D.2.2. This analysis starts with the review of the work of the technical committee of the main standardization bodies at the European level, CEN and CENELEC, and at the international level, ISO and IEC. They are actively working to provide standards that can be used by hydrogen supply chain players for demonstrating compliance with the competent authorities involved in the evaluation procedures for the safety and permitting of hydrogen technologies. 3 Harmonised standards for Pressure Equipment Directive: https://ec.europa.eu/docsroom/documents/51457 4 Harmonised standards for Low Voltage Directive: https://ec.europa.eu/docsroom/documents/59094 20 Within this framework, also the Society of Automotive Engineers (SAE) is working to provide hydrogen technologies of standards capable to boost innovation in the market. Indeed, SAE standards are also considered for EU hydrogen market. Given the importance of having standards supporting hydrogen technologies that increase trust and improve perception among stakeholders such as Fire Brigades, Ministries, public bodies for environmental protection and for territorial planning and safety, a general analysis of the main active technical committees for industrial, mobility, and residential applications has been conducted. Moreover, some of the main technical standards available today are reported even if the overall purpose of the present research was not to provide a comprehensive collection of both the standards and technical committees, which instead is available in the “Roadmap on hydrogen standardization” 5 document published by the European Clean Hydrogen Alliance. In the Conclusion section, a figure from the aforementioned Roadmap illustrating the status of the TCs involved in hydrogen standardization is presented. Through this deliverable, the aim is to show the main path of standardization framework for innovative technologies. In the case of one of the Italian standardization bodies, a specific focus on its activities is provided in Appendix A. Together with the technical committees’ activities, an overview of the development of standards for electrolysers, fuel cells, and storage systems, and the related connected devices has been provided. The first two standardization bodies analysed at European level are CEN and CENELEC, which, through their technical committees and working groups, are contributing to hydrogen technologies development 6 : • CEN-CLC/JTC 6 "Hydrogen in energy system" is responsible for standardization in the field of systems, devices, and connections for the production, storage, transport, and distribution, measurement, and use of hydrogen. In particular, the effort is focusing on the ISO 22734-1 standard concerning hydrogen production via electrolysers. There are 3 specific working groups within this technical committee working on other aspects related to hydrogen vocabulary and the guarantee of origin: o CEN/CLC/JTC 6/WG 1: Terms and Definitions; o CEN/CLC/JTC 6/WG 2: Guarantees of Origin; o CEN/CLC/JTC 6/WG 3: Hydrogen safety. • CEN/TC 23 “Transportable gas cylinders” is working on technical standards for the storage and transport of compressed hydrogen. In particular, one of their technical standard EN 17339 "Transportable gas cylinders - Fully wrapped carbon composite cylinders and tubes for hydrogen" aims to define specific minimum requirements for the design, construction, prototype testing, and inspections during the production phase of Type II, III, and IV cylinders to be mounted on a frame (e.g., cylinder packs and tube trailers) and also composite material tubes for the storage of compressed gas. The legal reference is Directive 2008/68/EC on the transport of dangerous goods. CEN/TC 23 published the technical standard EN 17533 "Gaseous hydrogen - Cylinders and tubes for stationary storage," which specifies the requirements for the design, manufacture, and testing of steel, stainless steel, aluminium alloy, or non-metallic construction material pressure vessels. These vessels can 5 Roadmap on hydrogen standardization” document published by the European Clean Hydrogen Alliance https://ec.europa.eu/docsroom/documents/53721/attachments/1/translations/en/renditions/native 6 CEN-CENELEC Work programme 2024 https://wp2024.cencenelec.eu/sectors-list/energy-and-utilities/ 21 be of Type II, III, and IV or metallic seamless (Type I) with a maximum operating pressure for the storage of compressed hydrogen of 1,100 bar. • CEN/TC 58 “Safety and control devices for burners and appliances burning gaseous or liquid fuels” is working to provide requirements for the Safety and control devices for equipment burning gaseous or liquid fuels, ranging from small domestic appliances to large industrial burners. They published CEN/TR 17924:2023 “Safety and control devices for burners and appliances burning gaseous and/or liquid fuels - Guidance on hydrogen specific aspects”. This useful document for the application of hydrogen in the residential sector is under revision to integrate the results of technical tests into theorical considerations on hydrogen leakages; • CEN/TC 69 “Industrial valves” which is working on (WI=00069246): Additional requirements for metallic valves for hydrogen application; • CEN/TC 234 “Gas infrastructure” which is focusing on the functional requirements from the input of gas into the on-shore transmission to the determination and coordination of all gas infrastructure. At the moment, this technical committee is considering aspects regarding standards like: o EN 16726, describing the composition of high calorific gas to integrate parameters like the Wobbe Index parameter and the admissible hydrogen concentration. Its publication is expected by 2025; o EN 17928 series on the injection stations for hydrogen (and biomethane), to be finalized in 2024; o A new Work item on ‘Gas infrastructure - Conversion of pipelines with maximum operating pressure over 16 bar for the use of hydrogen - Functional requirements’ intended to be published as EN 1594-2. • CEN/TC 235 “Gas pressure regulators and associated safety devices for use in gas transmission and distribution” which is working on (WI=00235019): Hydrogen Readiness of Gas Infrastructures - Requirements and Lab Test Procedure for Material Qualification of equipment; • CEN/TC 268 "Cryogenic vessels and specific hydrogen technologies applications" is working on technical standards for the storage and transport of liquid hydrogen. This work will also be relevant for the refuelling protocols of hydrogen refuelling stations, for the refuelling phases of FCEV vehicles, and for the quality that hydrogen must have to power FCs. Information has been collected through the analysis of the CEN/CENELEC Work programme which still remains the recommended source to check for the most recent news and advance regarding hydrogen standardization. The work of the technical committees of the international standardization body ISO was then analysed. Below are the current technical committees working on hydrogen technologies. In particular, the focus of ISO activity is on production, storage and dispensing of hydrogen and related equipment: • ISO/TC 22 “Road vehicles” is working on all aspects for all types of road vehicles and their interfaces approved for operation on public roads for the whole life cycle concerning safety, security, sustainability, compatibility, interchangeability, maintenance, evaluation of performance and quality; • ISO/TC 58 “Gas cylinders” is working for the standardization of gas cylinders and other pressure systems, their fittings and requirements relating to their manufacture and use. They published useful standards for certification of storage systems like: o ISO 11114-1:2020/Amd 1:2023 “Gas Cylinders - Compatibility of cylinder and valve materials with gas contents. Part 1: Metallic materials” (in collaboration with the previously mentioned CEN/TC 23 “Transportable Gas Cylinders”). This standard 22 provides an update regarding the requirements for the safety combination of different metallic cylinders and valves materials according to gas content and mixtures; o ISO 11515:2022 “Gas cylindersRefillable composite reinforced tubes of water capacity between 450 l and 3,000 l - Design, construction and testing”. This standard specifies the minimum requirements for the materials, design, construction and performance testing of: ▪ Type 2 hoop-wrapped composite tubes; ▪ Type 3 fully-wrapped composite tubes, and; ▪ Type 4 fully-wrapped composite tubes with water capacities between 450 l and 3,000 l for storage and conveyance of compressed or liquefied gases with test pressures up to and including 1,600 bar and a design life of at least 15 years. • ISO/TC 197 “Hydrogen technologies” is responsible for standardization in the field of systems and devices for the production, storage, transport, measurement, and use of hydrogen. This technical committee is very active in this sector and has published the following technical standards: o ISO 16110-1:2007 "Hydrogen generators using fuel processing technologies - Part 1: Safety, Part 2: Test methods for performance." This standard applies to hydrogen generation systems with a capacity less than 400 m3/h at 0 °C and 101.325 kPa, which convert an incoming fuel into a hydrogen-rich stream with composition and conditions suitable for the type of device using the hydrogen (e.g. a fuel cell power system or a hydrogen compression, storage, and dispensing system). The scopes of application range from industrial, light industrial, commercial, and residential both indoor and outdoor; o ISO 22734:2019 "Hydrogen generators using water electrolysis - Industrial, commercial, and residential applications," which defines the construction, safety, and performance requirements of modular or factory-adapted equipment for the generation of gaseous hydrogen. This standard concerns those gaseous hydrogen generators intended for industrial and commercial uses, and for indoor and outdoor residential use in protected areas, such as car ports, garages, storage areas, and similar areas of a dwelling but does not include those systems that can work in reverse mode like fuel cells to generate electricity. This standard is under revision and will be replaced by ISO/DIS 22734-1 "Hydrogen generators using water electrolysis" Part 1: General requirements, test protocols, and safety requirements; o ISO 19881:2018 "Gaseous hydrogen - Land vehicle fuel containers." This standard contains requirements related to the material, design, manufacture, marking, and testing of mass-produced refillable tanks exclusively intended for the storage of compressed gaseous hydrogen for operation of land vehicles. These tanks must have minimum characteristics: be permanently affixed to the vehicle, have a maximum water capacity of 1,000 l, and have a maximum working pressure not exceeding 70 MPa. The scope of this document is limited to hydrogen quality tanks for fuel cell vehicles according to ISO 14687 standard for land fuel cell vehicles and grade A or higher hydrogen according to ISO 14687 standard for internal combustion engine land vehicles. This document also contains requirements for hydrogen tanks acceptable for use on board light vehicles, heavy vehicles, and industrial trucks such as forklifts and other material handling vehicles. This standard will be replaced by ISO/DIS 19881 "Gaseous hydrogen Land vehicle fuel containers"; 23 o ISO 16111:2018 "Transportable gas storage devices - Hydrogen absorbed in reversible metal hydride." This standard is relevant for transportable metal hydride storage systems. It defines the requirements applicable to the material, design, construction, and testing of transportable storage systems using enclosures with an internal volume not exceeding 150 l and with a maximum developed pressure (MDP) not exceeding 25 MPa. It is not applicable to metal hydride storage systems intended to be used as fixed fuel tanks on board hydrogen-powered vehicles; • ISO/TC 197/SC 1 "Hydrogen at scale and horizontal energy systems" is a sub-committee instituted under ISO/TC 197 and that deals with the standardization of large-scale hydrogen systems and energy applications, including aspects related to testing, certification, sustainability and positioning, and coordination with other standardization bodies and stakeholders. This TC should support the implementation of large-scale projects where blending with other fuels is considered. The technical committee is also actively working on publishing standards for calculating pollutant gas emissions from the different possible processes for hydrogen production. Among the various areas of work of ISO/TC 197/ SC1, there is a standard aimed at liquid hydrogen storage systems for a specific application, ISO/AWI 19888-1 "Hydrogen Technologies — Aerial Vehicles — Part 1: Liquid Hydrogen Fuel Storage System." This technical standard intends to specify the procedures and testing requirements that a manufacturer must follow to verify the performance of a safe fuel storage system mounted on hydrogen-powered aerial vehicles. Another standardization body analysed is the IEC. Most of the IEC activity is related to FC technology and its use in stationary applications. The most active IEC technical committee is TC 105 “Fuel cell technologies”. It has a lot of ongoing projects like for Micro CHP, Reverse operating FC power systems and portable FC power systems. Here are reported some of the standards considered (according to projects analysed and stakeholders’ engagement activity in HYPOP): • IEC 63341-3: Railway applications - Fuel cell systems for rolling stock - Part 3: Performance test methods for fuel cell power system; • IEC 62282-8-201: Fuel cell technologies - Part 8-201: Energy storage systems using fuel cell modules in reverse mode - Test procedures for the performance of power-to-power systems; • IEC 62282-3-300: Fuel cell technologies - Part 3-300: Stationary fuel cell power systems – Installation; • IEC 62282-8-101: Fuel cell technologies - Part 8-101: Energy storage systems using fuel cell modules in reverse mode - Test procedures for the performance of solid oxide single cells and stacks, including reversible operation; • IEC 62282-7-2: Fuel cell technologies - Part 7-2: Test methods - Single cell and stack performance tests for solid oxide fuel cells (SOFCs); • IEC 62282-4-600:2022: Fuel cell technologies - Part 4-600: Fuel cell power systems for propulsion other than road vehicles and auxiliary power units (APU) - Fuel cell/battery hybrid systems performance test methods for excavators. Another standardization body considered as a reference for some of the technologies in the hydrogen value chain is the SAE Standards for Mobility Knowledge and Solutions (SAE). This standardization body is mainly focused on hydrogen refuelling stations that, as a facility composed by different hydrogen technologies, also provides significant specific requirements for the connection devices between the dispenser and the vehicle that could contribute to the development of the hydrogen value chain, mainly for mobility. 24 Moreover, the technical committees and the analysis of the current standardization activity provided examples of the standards available for hydrogen technologies represented as follows: • SAE J2601/2_202307 Fuelling Protocol for Gaseous Hydrogen Powered Heavy Duty Vehicles; • SAE J3089_201810 Characterization of On-Board Vehicular Hydrogen Sensors; • SAE J2579_202301 Standard for Fuel Systems in Fuel Cell and Other Hydrogen Vehicles; • SAE J2600_201510 Compressed Hydrogen Surface Vehicle Fuelling Connection Devices; • SAE J2601_202005 Fuelling Protocols for Light Duty Gaseous Hydrogen Surface Vehicles; • SAE J2578_202301 Recommended Practice for General Fuel Cell Vehicle Safety. The main technical committee working on these standards is the Fuel Cell standard committee. Additional technical standards and standard proposals mentioned in demonstration projects were included in the following section. 25 3 Evidences of Certification Requirements application for H2 Projects This section reports some examples of the experiences shared by stakeholders engaged during WP2 activities as well as the results of the data research pursued for the purposes of the project. Emphasis has been put on topics that appeared to have more resonance in this transition phase towards novel end uses of hydrogen technologies in industrial, mobility and residential sectors. For example, renewable hydrogen generation through electrolysis, hydrogen technologies used in HRS and potential protocols published to homologate innovative H2-fuelled vehicles other than cars are reported in this section. 3.1 Certification requirements for Innovative FCH technology: EVERYWH2ERE project The EVERYWH2ERE project (H2020, G.A. nr 779606) aims to demonstrate the reliability of fuel cell (FC) technologies in temporary power generators, which are set to replace the predominantly diesel engine-based solutions currently in use, thus carving out a significant but specific market niche for FC technologies. Throughout the project, four PEMFC (Proton Exchange Membrane Fuel Cell) equipped, containerized "plug and play" generators—two rated at 25 kW and two at 100 kW— were constructed and evaluated through a pan-European demonstration campaign that adopted a "demonstration to market" approach (Figure 3). The project field-tested these prototypes at construction sites, music festivals, and urban public events across Europe, showcasing their versatility. The following Figure 4 shows the innovative integration of different components in a containerized system: FC (with its power electronics and control), battery system, storage system and BoP elements like compressors and pumps. Figure 3 Example of test on site for EVERYWH2ERE Genset with bundles 32 3.5 Hydrogen production and use for micro-grid/off grid remote areas: the experience of the REMOTE project The EU funded project REMOTE (H2020, G.A. nr 779541), aimed to demonstrate the technical and economic feasibility of two innovative energy storage solutions based on fuel cells (an integrated P2P system, a non-integrated P2G+G2P system) for building applications. Three real case studies in isolated micro-grids or off-grid remote areas implemented energy management solutions powered by renewable electricity. The following technical standards were considered for the different technologies operating in the project. Standards applied to the Gas to Power system (fuel cell): • IEC 60204-1:2016 “Safety of machinery – Electrical equipment of machines. Part 1: General requirements”. A new version of this publication exists, IEC 60204-1:2016+A1:2021; • IEC 61000-6-22016 Electromagnetic Compatibility (EMC) - Part 6-2: Generic standards - Immunity for industrial environments; • IEC 61000-6-3:2020 Electromagnetic Compatibility (EMC) - Part 6-3: Generic standards - Emission standard for residential, commercial, and light-industrial environments; • IEC TS 62282 Fuel cell technologies; • ISO/TR 15916:2015 Basic Consideration for the safety of hydrogen systems. Standards applied to the Power to Gas system (electrolyser): • IEC 60204-1:2016 “Safety of machinery – Electrical equipment of machines. Part 1: General requirements”. It has been recently reviewed with IEC 60204-1:2016+AMD1:2021 • IEC 61000-6-2:2016 Electromagnetic Compatibility (EMC) - Part 6-2: Generic standards - Immunity for industrial environments; • IEC 61000-6-3:2020 Electromagnetic Compatibility (EMC) - Part 6-3: Generic standards - Emission standard for residential, commercial, and light-industrial environments; • ISO 22734-1:2019 Hydrogen generators using the water electrolysis process – Part 1: Industrial and commercial applications; • UNI EN ISO 13445-3 Unfired pressure vessels - Part 3: Design; • EN ISO 4126-1 Safety Devices for protection against excessive pressure – Part 1: Safety valves; • ISO/TR 15916 Basic Consideration for the safety of hydrogen systems. Standards applied to the storage system: • UNI EN ISO 13445-3 Unfired pressure vessels - Part 3: Design; • EN ISO 4126-1 Safety Devices for protection against excessive pressure – Part 1: Safety valves; • ISO/TR 15916 Basic Consideration for the safety of hydrogen systems. Through this experience, we have evidence of a real application in residential sector of technical standards for different hydrogen technologies. 33 4 Conclusions The actual situation of the standards development sees technical committees working in parallel to provide standards that in some cases can also have a cross sectorial impact among industrial, residential and mobility fields. Innovative hydrogen technologies can indeed take advantage of this to comply with the certification requirements needed. To achieve full compliancy under a certain CE Marking Directive, harmonised standards applied by Notified Bodies during the different assessment procedures should be taken into account by manufacturers of hydrogen technologies. Considering the projects analysed by the HYPOP consortium, the ATEX Directive has been widely shared by stakeholders as relevant for hydrogen technology certification. This primarily applies to electrolysers, fuel cells, and storage systems and it is also valid for other components of the BoP of a hydrogen facility due to the risk of explosive atmospheres. Such technologies are classified in Group II, and the associated category depends on the risk of the area, the technologies, and therefore the characteristics of the project. The certification process necessarily involves a compliance procedure according to this Directive. The modules to be submitted vary according to the category, ranging from category 1 (environment with a low probability of explosive atmosphere formation for short periods and a product capable of ensuring sufficient safety) in which it is required to lodge a technical documentation (Module A) to category 3 (environment with a higher probability of explosive atmosphere formation for long periods). In the case of category 3, in addition to the technical documentation, the Notified Body will examine and test the sample to assess whether it has been produced correctly according to applicable harmonized standards or other adopted solutions (Module B). Furthermore, evaluations will be conducted on the quality control system adopted by the manufacturer to monitor the production process (Module D) or evaluations carried out directly on each product individually (Module F). To comply with the requirements of ATEX Directive and to conform to what is required by the authorities responsible for safety and permitting aspects, there are various harmonized standards that support manufacturers. The Machinery Directive applies to products that compose hydrogen systems such as pumps and compressors and other hydrogen technologies. Generally, these do not necessarily have to be evaluated by a Notified Body, and therefore the information to report includes a general description of the product, conceptual design and manufacturing drawings and schemes of components, subassemblies, circuits. Regarding innovation, there are various Technical Committees (TCs) working to provide updated standards in response to new applications and safety requirements, especially for new applications such as residential and mobility, where the perception of risk by the competent authorities is greater. Given the flammability range of hydrogen, it falls within Group I (related to flammable, toxic, and/or oxidizing fuels) as indicated in EC Regulation n.1272/2008. For this reason, and due to the generally high working pressures above 0.5 bar, a large portion of the technologies aimed at the production, storage, distribution and use of hydrogen must comply with the requirements of the PED Directive. During the certification process this means that a manufacturer of a storage system, pipes, or electrolysers (categories III and IV) must undergo an evaluation by a Notified Body based on the modules indicated in the Directive. Under this Directive, there are numerous tests and inspections that hydrogen technologies must undergo according to the referenced harmonized standards. Most of the hydrogen technologies should also take into account the Low Voltage Directive as it is referred to electrical equipment that work under voltage rating between 50 and 1,000 V for 34 alternating current and between 75 and 1,500 V for direct current (like fuel cells). In this case, harmonised standards are even more important as the involvement of a Notified Body is not required (only Module A). Through the activities carried out in Task 2.3, it was possible to highlight the importance of having official guidelines that partially bridge the gap concerning, for example, the homologation of hydrogen trains through the combination of technical standards and standards under approval. Additionally, an example of the technical standards used for the certification of an electrolyser in Bulgaria was provided, as well as a reference to the technical standards required by safety authorities in Italy regarding electrolysers, compressors, and storage systems for a hydrogen facility. Similarly, examples of technical standards used for hydrogen refuelling stations (HRS) were provided through observations shared by stakeholders from Belgium and Poland. Finally, the residential sector was addressed through a list of standards considered in the Remote project, which includes various technologies such as storage systems, fuel cells, and electrolysers. In the same way, EVERYWH2ERE project has been analysed to show EU Directives and technical standards for certification of safety and design, production and installation aspects of an innovative Genset where FC technology, hydrogen storage and battery systems have been integrated in a containerized configuration. The application of hydrogen technologies in the industrial, mobility, and residential sectors will be further supported by the activity of technical committees aimed at modifying and making the existing standards more efficient and possibly developing new ones based on the emerging technical needs and on the hydrogen new applications. Significant ongoing effort among various standardization bodies to address sector-specific needs while ensuring that hydrogen technologies can be safely integrated into existing and new markets. The collaboration between these technical committees and stakeholders is crucial for the innovative and safe expansion of hydrogen technology applications across residential, mobility, and industrial sectors. This cooperative approach not only addresses the current regulatory and safety challenges but also prepares the hydrogen economy for future growth and integration into diverse markets. The projects analysed by HYPOP consortium allowed to identify some of the main TC’s developments of standards which regard: • Transversal fields of activity covering technologies for the production, storage, transport, and distribution, measurement, and use of hydrogen. Main actions are concerning renewable hydrogen production with CEN-CLC/JTC 6 "Hydrogen in energy system" (efforts on the ISO 22734-1 standard concerning hydrogen production via electrolysers) and ISO/TC 197 “Hydrogen technologies” (efforts on ISO 22734:2019 "Hydrogen generators using water electrolysis - Industrial, commercial, and residential applications"). • Hydrogen storage with the activity of CEN/TC 23 “Transportable gas cylinders” which is focusing on designing of composite materials cylinders and stationary applications for compressed hydrogen. Moreover, standards supporting manufacturing and use of hydrogen cylinders is carried out by ISO/TC 58 “Gas cylinders”. In the case of cryogenic hydrogen, CEN/TC 268 "Cryogenic vessels and specific hydrogen technologies applications" is working on technical standards for the storage and transport of liquid hydrogen, that will be relevant also for protocol for refuelling of HRS (main topic of SAE standards for HRS refuelling protocols) and refuelling of FCEV vehicles; 35 • For the residential sector is relevant the activity of CEN/TC 58 “Safety and control devices for burners and appliances burning gaseous or liquid fuels” as it ranges from small domestic appliances to large industrial burners; • For fuel cells in reverse mode for power-to-power configurations (relevant also for residential sector) and among others in railway applications, there is the IEC/TC 105 “Fuel cell technologies”. However, the framework is wider than this as it can be seen in the following Figure 5, taken from the “Roadmap on hydrogen standardization” published by the European Clean Hydrogen Alliance. Hydrogen sector and its technologies are expected to be completely covered in the following years to provide stakeholders of instruments to comply the safety and permitting requirements. Figure 5 “Roadmap on hydrogen standardization” document published by the European Clean Hydrogen Alliance 36 5 Appendix A Within the deliverable, the work of the TC of international standardisation bodies have been mentioned. In some cases, the European/international committees have national “mirror” committees with the purpose of involving national experts in the study of international standards. 5.1 Italy At Italian level, these national committees work within the framework of two standardization bodies, UNI and CEI, who also contribute to new technical standards for the hydrogen value chain. Some examples of the UNI’s standards development activity are reported here. In some cases, UNI delegates the standardization activity to independent organizations that are more vertical to specific sectors 8 . The main UNI’s technical committees working on hydrogen are UNI/TC 056 and UNI/CT 286. UNI/TC 286 activity is linked to the one of the independent body, Comitato Termotecnico Italiano (CTI) (Table 12). Table 12 Cross standardization activity between UNI and CTI Technical committee Scope UNI/CT 286/GL 01 CTI - Tanks for hydrogen in land vehicles UNI/CT 286/GL 02 CTI - Hydrogen from water electrolysis and fuels UNI/CT 286/GL 03 CTI - Components for hydrogen gas transport - metal hydrides UNI/CT 286/GL 04 CTI - Hydrogen gas and hydrogen mixtures refuelling stations UNI/CT 286/GL 05 CTI - Specifications for hydrogen as a fuel UNI/TC 056 (established in 2017 and mirror technical committee of CEN/CLC/JTC 6 “Hydrogen in energy systems” and ISO/TC 197 “Hydrogen technologies”) works on Systems, devices and connections for the production, storage, transport, distribution, measurement and use of hydrogen, from renewable energy sources and other sources. Excluded from the scope of activities are: o the storage and transport of liquid hydrogen; o the storage and transport of compressed hydrogen; o the infrastructures covered by Mandate M/533 Alternative fuels infrastructures; o the injection of hydrogen and mixtures of hydrogen with natural gas (H2NG) into gas infrastructures; o the use of mixtures of natural gas with hydrogen. In parallel, UNI cooperates with other international committees like IEC/TC 105 'Fuel cell technologies thanks to the CEI standardization body. 8 https://www.uni.com/?s=idrogeno provides an overview about all the UNI standards for hydrogen. 37 All the references are from the UNI website 9 At the moment, there are 13 standards published by the UNI/TC 056 and no public inquiries are ongoing. UNI/TC 056 has been recently working on projects for new standards like 10 : 1) project of standard UNI 1613708 (that should adopt ISO 22734:2019). This standard proposal deals with hydrogen generators and defines the construction, safety and performance requirements for modular or factory-fitted equipment for the generation of hydrogen gas, called hydrogen generators, which use the electrolytic splitting of water to produce hydrogen. It applies to hydrogen generators intended for industrial and commercial use, as well as for indoor and outdoor residential use in protected areas, such as car ports, garages, storage rooms and similar areas of a dwelling. 2) Project of standard UNI 1610884 (adopts ISO 16110-1:2007), applies to packaged, self-contained or factory-assembled hydrogen generation systems with a capacity of less than 400 m3/h at 0°C and 101.325 kPa, referred to herein as hydrogen generators, that convert an input fuel into a hydrogen-rich stream of a composition and condition suitable for the type of device using the hydrogen (e.g. a fuel cell power system or a hydrogen compression, storage and delivery system). 3) Project of standard UNI 1610885 (adopts ISO 16110-2:2010). It provides test procedures for determining the performance of packaged, self-contained or factoryassembled hydrogen generation systems with the same features and under the same test conditions of the previous UNI 1610884 (ISO 16110-1:2007); 4) Project of standard UNI 1610887, contains requirements for the material, design, manufacture, marking and testing of refillable containers produced in series and intended exclusively for the storage of compressed hydrogen gas for the operation of land vehicles. These containers: are permanently attached to the vehicle, have a capacity of up to 1,000 l of water, and have a nominal working pressure not exceeding 70 MPa. The scope of the document is limited to hydrogen containers of suitable fuel cell grade according to ISO 14687 for fuel cell land vehicles and hydrogen of grade A or higher according to ISO 14687 for land vehicles with internal combustion engines. It also contains requirements for hydrogen containers acceptable for use on board light vehicles, heavy-duty vehicles and industrial motor trucks such as forklifts and other material handling vehicles. It adopts ISO 19881:2018. 5) Project of standard UNI 1610886, establishes minimum requirements for pressure relief devices intended for use on fuel containers for hydrogen-powered vehicles. The scope of this document is limited to thermally activated pressure relief devices installed on fuel containers used with fuel cell grade hydrogen according to SAE J2719 or ISO 14687 for fuel cell land vehicles, and Grade A or higher hydrogen for land vehicles with internal combustion engines. This document also contains requirements for thermally activated pressure relief devices acceptable for use on light vehicles, heavy vehicles and industrial trucks such as forklifts and other material 9 Dettaglio commissione - UNI - Ente Italiano di Normazione 10 Publication of preliminary public enquiry March 2024 https://www.uni.com/undici-progetti-entrano-oggiin-inchiesta-pubblica-preliminare-marzo-2024/ 38 handling vehicles. Safety devices designed to comply with this document are intended for use with high-quality hydrogen. It adopts ISO 19882:2018. 6) Project of standard UNI 1610890, specifies the requirements for wire or fabric reinforced hoses and hose assemblies suitable for hydrogen dispensing up to a nominal working pressure of 70 MPa, in the operating temperature range from -40°C to 65°C. The document contains safety requirements for the material, design, manufacture and testing of hydrogen gas hoses and hose assemblies for hydrogen filling stations. It adopts ISO 19880-5:2019 11 . Other technical committees of UNI are working in parallel for hydrogen standardization: • UNI/CT 100 - CIG - Comitato Italiano Gas (Italian Gas Committee) is working on the UNI 1613560 project that establishes the criteria for verifying the existence of the safety requirements of domestic and similar systems for the use of combustible gases, regardless of the date of their construction, in order to establish whether the verified gas system can continue to be used in the state in which it is, without compromising safety, in accordance with current legislation. It deals exclusively with the verification aspects of installations. It also establishes the criteria for the verification of plants that are to be converted to the use of natural gas and hydrogen mixtures. It replaces UNI 10738:2012 12 . • UNI/CT 100 - CIG - Comitato Italiano Gas and is working on the project UNI 1612619. The document deals with safety and control devices for burners and gas and/or liquid fuel appliances. It is drawn up in anticipation of a forthcoming revision of standards concerning the safety, design, construction, performance and testing requirements for safety, control or regulation devices for burners and user appliances with variable mixtures. The aim of the document is to provide guidance on specific hydrogen-related aspects that need to be considered in the future standardisation work of CEN/TC 58. It also contains several indications and information that improve knowledge in relation to the potential use of hydrogen not only on specific products such as safety and control devices for gas burners and gas utilising appliances, but also on materials and seals, to the benefit of the whole gas chain. It implements CEN/TR 17924:2023. The following is an example of the results of cooperation between UNI TCs and the independent body that represents specific sectors in Italy. Currently, there is only one Italian (and European) standard for testing heat generators that use 20% by volume of hydrogen mixed with natural gas for combustion. The first technical specification UNI/TS 11854 was published on February 24, 2022, developed within the Comitato Italiano Gas (CIG) with the contribution of Assotermica (the association of manufacturers of appliances and components for heating systems federated by Anima Confindustria) and dedicated to heat generators powered by natural gas and hydrogen mixtures up to 20% by volume 13 . 11 Publication of preliminary public inquiry May 2022 https://www.uni.com/sono-quindici-i-progetti-entratioggi-in-inchiesta-pubblica-preliminare/ 12 Publication of preliminary public inquiry January 2024 https://www.uni.com/otto-progetti-entrano-oggiin-inchiesta-pubblica-preliminare-2/ 13 For more information about the UNI activities on hydrogen, there is a dedicated webpage with all the necessary information: https://www.uni.com/?s=idrogeno 39 The Italian electrotechnical committee (CEI) is working together with UNI by mean of the technical committee CT 052 – “Hydrogen” and it follows the activities of the Working group constituted under CEN/CLC/JTC 6 Hydrogen in energy systems and ISO/TC 197 Hydrogen technologies. 5.2 Spain Spain has the following mirror committees: • CTN 181 – Hydrogen technologies committee: Spanish mirror committee to ISO/TC 197 committee on Hydrogen technologies, responsible for adapting European normative such as UNE-ISO 14687:2006 about specifications, UNE-ISO/TR 15916:2007 IN about basic security considerations or UNE 181001:2010 about terminology. The secretariat is chaired by AeH2 (Spanish Hydrogen Association) • CTN 222 – Fuel cell technologies committee: Spanish committee devoted to normalisation. It is a mirror for IEC/TC 105 about fuel cell technologies. The secretariat is chaired by CNH2 and is divided in 14 work groups which cover topics from terminology to security and environmental performance. • CTN 203/SC 69 - Electrical power/energy transfer systems for electrically propelled road vehicles and industrial trucks: Spanish committee related to IEC/TC 69.