Hamburg Energy Networks in Germany is leveraging cost-effective and environmentally friendly solutions by integrating an existing natural gas pipeline into the Hamburg Hydrogen Industry Network (HH-WIN). The acquisition of a former high-pressure connecting pipeline, at a significantly lower price than building a new hydrogen pipeline, will result in savings of around 18 million euros and reduce construction work for the connection to the European hydrogen pipeline system. This move aligns with the city's goals of transitioning to green hydrogen and achieving climate targets. The federal government and the Free and Hanseatic City of Hamburg are jointly funding the project under the 'Important Projects of Common European Interest' program. By repurposing the pipeline, approximately seven kilometers of new construction, including sensitive areas like forests and traffic-heavy streets, can be avoided, streamlining the project and benefiting both the environment and the local community. Technical assessments have confirmed the existing pipeline's suitability for hydrogen transportation, thanks to corrosion protection measures like nitrogen filling and cathodic pipe protection. The project is progressing without delays, with a planned commissioning date of 2027 for the initial 40 kilometers. Hamburg Energy Networks' innovative approach marks a significant advancement in the city's energy transition efforts.