The progressing energy transition and a fast buildup of the hydrogen pipeline backbone will play a major role in achieving net zero targets. The conversion of existing pipelines for the transport of hydrogen will play a key role in achieving the targets, which introduces new challenges for pipeline owners and operators. Pipeline repurposing projects and related in-line inspection (ILI) requirements are connected to industry practices for increasing the sensitivity of axial crack detection. EMAT technology has been established as a viable method for in-line inspections of pipelines. Built on existing EMAT technology, the new EMAT Ultra technology presented here allows for a seamless integration of existing experiences and workflows. The sensor coverage for this ILI technology has been doubled in order to achieve redundancy and a dual sound path approach (CW, CCW). The detection reliability for cracks with critical dimensions has been improved to 95% (POD), exceeding current industry standards. 

This paper will present the performance of this new technology based on industry standards, and will highlight the results obtained from several pipeline inspections. This technological improvement aims to contribute positively to the pipeline industry by fostering innovation, while respecting the robust foundations laid by existing EMAT technology. The paper will outline an industry best practice from a pipeline integrity standpoint and show how the new EMAT Ultra Technology for axial crack detection could support pipeline operators in de-risking the conversion process from natural gas to hydrogen transportation.