Periodic Reporting for period 1 - CANDHy (Compatibility Assessment of Non-steel metallic Distribution gas grid materials with Hydrogen)
Okres sprawozdawczy: 2023-09-01 do 2025-02-28
CANDHy aims to assess the integrity and tolerance of non-steel metallic natural gas distribution networks in long-term operational conditions delivering H2/natural gas (NG) admixtures (up to 100 vol% H2). To achieve this result, gas operators, regulators, authorities and end-users confidence must be enhanced through consolidated and exhaustive scientific data, obtained through harmonized guidelines. Those guidelines will provide the necessary input to prenormative actions conducted through European organisations and will enable a smooth interconnection between gas grids.
In order to investigate the readiness of the natural gas distribution grid, CANDHy has stablished the following specific objectives:
-Performing a full review of the state of art of i) the European gas distribution grids and ii) the standards and codes on testing regarding material compatibility with hydrogen and iii) hydrogen embrittlement mechanisms, to collect information for the development of useful testing protocols to derive the properties of the classes of materials studied in CANDHy in their relevant operating conditions.
-Design, development and performance of the experimental campaign to test the most relevant non-steel metallic materials found in CANDHy under different hydrogen levels to assess their tolerance towards this gas at operating conditions usual for the distribution grid.
-Documenting and analysing the effect of hydrogen gas on the non-steel metallic materials tested in the experimental campaign previously explained.
-Developing models for the prediction of hydrogen embrittlement mechanisms.
-Proposing guidelines, procedures and areas of development to support future standardization related with the testing and qualification of materials of the distribution network in the presence of H2/NG blends
-Developing a technical database for hydrogen compatibility of metals as a tool to aid in the selection of materials for use in hydrogen gas distribution
In order to investigate the readiness of the natural gas distribution grid, CANDHy has stablished the following specific objectives:
-Performing a full review of the state of art of i) the European gas distribution grids and ii) the standards and codes on testing regarding material compatibility with hydrogen and iii) hydrogen embrittlement mechanisms, to collect information for the development of useful testing protocols to derive the properties of the classes of materials studied in CANDHy in their relevant operating conditions.
-Design, development and performance of the experimental campaign to test the most relevant non-steel metallic materials found in CANDHy under different hydrogen levels to assess their tolerance towards this gas at operating conditions usual for the distribution grid.
-Documenting and analysing the effect of hydrogen gas on the non-steel metallic materials tested in the experimental campaign previously explained.
-Developing models for the prediction of hydrogen embrittlement mechanisms.
-Proposing guidelines, procedures and areas of development to support future standardization related with the testing and qualification of materials of the distribution network in the presence of H2/NG blends
-Developing a technical database for hydrogen compatibility of metals as a tool to aid in the selection of materials for use in hydrogen gas distribution
• A thorough review of the state of the art of grid materials was performed by creating a questionaire and distributing it among DSOs and gas associations to collect relevant data (i.e. type of materials, year of installation, pipeline lenght, etc.). All the data collected was revised and conclusions are collected in a public deliverable (D2.1)
• A review of the state-of-the art of relevant standards useful for studying embrittlement phenomena in non-steel metallic materials was performed. A public deliverable was generated describing the outcomes of the RCS (D2.2)
• A literature review about hydrogen dissociation, solubility and diffusion in non-steel metallic materials was performed and can be found in a public deliverable (D2.3)
• The information extracted from the different reviews carried out allowed the selection of the most representative materials to carry out the experimental campaign. In addition, it allowed the design of the experimental matrix to be followed in the campaign, which is currently underway. The experimental test matrix along with the main characteristics of the materials selected and specimen geometries were collected in a public deliverable (D3.2)
• Testing platforms were adapted to the new operating conditions (pressure level < 16 bar) and to allocate the new kinds of non-steel metallic components.
• The selected testing materials were adquired and machining is under progress.
• The first specimens (SSRT tests) were distributed among partners and testing is ongoing.
• A review of the state-of-the art of relevant standards useful for studying embrittlement phenomena in non-steel metallic materials was performed. A public deliverable was generated describing the outcomes of the RCS (D2.2)
• A literature review about hydrogen dissociation, solubility and diffusion in non-steel metallic materials was performed and can be found in a public deliverable (D2.3)
• The information extracted from the different reviews carried out allowed the selection of the most representative materials to carry out the experimental campaign. In addition, it allowed the design of the experimental matrix to be followed in the campaign, which is currently underway. The experimental test matrix along with the main characteristics of the materials selected and specimen geometries were collected in a public deliverable (D3.2)
• Testing platforms were adapted to the new operating conditions (pressure level < 16 bar) and to allocate the new kinds of non-steel metallic components.
• The selected testing materials were adquired and machining is under progress.
• The first specimens (SSRT tests) were distributed among partners and testing is ongoing.
CANDHy will make progress beyond the state of the art by tackling the following aspects:
- Material integrity testing platforms at MOP<16 bar
- Long-term material integrity assessment replicating distribution network conditions in testing platforms
- Testing relevant metallic materials, different from the well studied steels, with a methodology that involves simultaneous test in independent R&D platforms following a common methodology
- Mapping diversity of existing distribution networks across Europe.
- Complete and comprehensive review of materials present in the European gas distribution network.
- Testing campaigns at low pressure conditions covering H2/NG blends up to 20% and 100%mol
- Testing facilities within CANDHy allow precise control of pressure and gas composition, and testing program with different levels of pressure and blending of < 20% and 100% H2 will push above the state-of-the-art.
- Modelling the influence of hydrogen on identified safety and risk areas.
- Study of the effect of hydrogen embrittlement on non-steel metallic materials using numerical algorithms.
- Novel harmonised protocols to measure mechanical and chemical impact of hydrogen for grid components
- Harmonised, reputable and repeatable protocols that can cover the divergence in results and lack of consensus and confidence among stakeholders of current standards.
- Material integrity testing platforms at MOP<16 bar
- Long-term material integrity assessment replicating distribution network conditions in testing platforms
- Testing relevant metallic materials, different from the well studied steels, with a methodology that involves simultaneous test in independent R&D platforms following a common methodology
- Mapping diversity of existing distribution networks across Europe.
- Complete and comprehensive review of materials present in the European gas distribution network.
- Testing campaigns at low pressure conditions covering H2/NG blends up to 20% and 100%mol
- Testing facilities within CANDHy allow precise control of pressure and gas composition, and testing program with different levels of pressure and blending of < 20% and 100% H2 will push above the state-of-the-art.
- Modelling the influence of hydrogen on identified safety and risk areas.
- Study of the effect of hydrogen embrittlement on non-steel metallic materials using numerical algorithms.
- Novel harmonised protocols to measure mechanical and chemical impact of hydrogen for grid components
- Harmonised, reputable and repeatable protocols that can cover the divergence in results and lack of consensus and confidence among stakeholders of current standards.