Hydrogen can be transported through pipelines in its gaseous form, just like natural gas. The construction of a hydrogen pipeline is similar to that of a natural gas pipeline, with some important differences to take into account the unique properties of hydrogen.

Here are some key considerations for the construction of a hydrogen pipeline:

·         Materials: The materials used for the construction of the pipeline must be able to withstand the corrosive nature of hydrogen. Carbon steel, for example, is not suitable for use in hydrogen pipelines, as it can corrode over time. Instead, materials such as stainless steel, aluminum, or special alloys such as inconel or hastelloy can be used.

·         Pipe diameter: The diameter of the pipe should be chosen based on the desired flow rate and pressure of the hydrogen. As hydrogen has a lower density than natural gas, the required pipe diameter may be larger for a given flow rate.

·         Welding: Welding is a critical step in the construction of any pipeline, and special precautions must be taken when welding hydrogen pipelines. Hydrogen can form flammable mixtures with air, so it is important to purify the air around the welding area and use shielding gases to prevent the formation of explosive mixtures.

·         Safety systems: Hydrogen pipelines must have a number of safety systems in place to prevent accidents and leaks. These can include overpressure protection, leak detection systems, and emergency shutdown systems.

·         Permitting: As with any major construction project, building a hydrogen pipeline will require obtaining the necessary permits and approvals from relevant government agencies.

Overall, the construction of a hydrogen pipeline requires careful planning and attention to detail to ensure the safe and efficient transport of hydrogen.

Transportation through gas pipelines is realized in case of cumulation of many producers and customers in one location. In the world there are many rather large networks, the most important one probably in Germany where the total length of network exceeds 200 km. The operational pressure in this network is 2.5 MPa, the transportation capacity of the network is 50 mil. m3 per hour. The pipeline has a diameter of 20 cm and it is placed one meter under the ground. The operational loss is about 1%.  In the USA (Texas), there is a network 96 km long with similar parameters. Other two smaller are, for example, in France, the UK and other countries. There are more than 1000 km operational hydrogen pipelines in the world (Šváb, 2006, s. 25-26).