To supply energy-intensive industries in Hamburg with hydrogen, Gasnetz Hamburg is building the Hamburg hydrogen industrial network HH-WIN in the city's harbour. The 60-kilometre infrastructure will initially connect the electrolysis plant of the Green Hydrogen Hub at the former Moorburg power plant site with industrial users. By connecting it to the planned German/European long-distance hydrogen pipelines, HH-WIN will become the central link in Hamburg's hydrogen economy. The grid will enable the substitution of natural gas with an annual energy volume of 6.4 terawatt-hours with green hydrogen. In the long term, this will allow a CO2 reduction of 1.2 million tons/year.