This type of transport uses the existing network of pipelines designed for transporting natural gas, to which a certain amount of hydrogen would be added. Currently, the gas network is technically prepared for hydrogen additions of up to 2 %. After technical modifications, it would theoretically be possible to transport up to 10% hydrogen. The main disadvantage of this type of transport is the need to separate hydrogen from natural gas at the end user. The advantage is the higher flow rate of the natural gas/hydrogen mixture through the pipeline. This mode of transport is cost-effective at high transport volumes and when a large number of customers are concentrated in one region. According to the German Hydrogen Strategy, 1 200 wagons, 600 ships or 82 cm diameter pipelines are required to transport 100 000 tonnes of hydrogen. [19