The aim of the project is to complete a literature review and a technical design assessment to ascertain if existing pipe lining technology could be used in SGN’s LTS network to safely transport hydrogen blends up to 100%. Internal lining technology has been underexploited in the past within onshore gas transportation. This is because permeation through the lining materials into the annular space can cause the liner to collapse. This would be more prevalent due to the properties of hydrogen. Several venting solutions have been attempted but are not suitable when transporting hydrogen. The future strategy of this project to the GB gas network will be to develop lining technology as a viable solution to extend the life of existing assets where the current material is not suitable to transport hydrogen.

Benefits

·          The project will provide unique and referenceable information for Network licensees and Industry on a potential new transmission pipeline materials option with 100% hydrogen. The learning gained from the project can be applied to Network Licensees and their network operations to facilitate safe transition to hydrogen from natural gas.

·          The literature review and reports will provide a detailed analysis of the design, tools and techniques required for safe deployment of the lining technology

·          It can result in extended asset life for materials that have been defined as unsuitable for operation with hydrogen transportation and transmission.

·          It will help identify suitably impermeable lining materials, providing additional solutions when trying to solve the issue of hydrogen embrittlement and hydrogen gas escapes.