This deliverable provides recommendations and guidelines for the inspection of pipelines intended for the transport of H2-NG mixtures. Its purpose is to define methods, tools, and technologies for managing multi-gas networks and quality monitoring, including simulation, forecasting, and managing safe network operation in the context of the widespread use of hydrogen injection throughout Europe. The main objective of this document is to propose best practices for hydrogen safety in natural gas infrastructure and managing the risks associated with blending natural gas with hydrogen in gas transmission and distribution networks.
Based on the conducted tests and comparisons, the report developed a protocol and recommendations for hydrogen management, identifying the risks and extent of damage that may result from the presence of hydrogen, or it blends. The report analyses the impact of hydrogen on the durability of materials and components used in natural gas transmission and distribution infrastructure, the types of damage caused by hydrogen, and the degradation mechanisms of steel pipes exposed to hydrogen. The project verified existing methods and identified and tested alternative methods for steel pipelines inspections.
