Hydrogen pipeline transport

Hydrogen pipeline transport is a transportation of hydrogen through a pipe as part of the hydrogen infrastructure.
Economics.
Hydrogen pipeline transport is used to transport hydrogen from the point of production or delivery to the point of demand. Although hydrogen pipeline transport is technologically mature, and the transport costs are similar to those of CNG, most hydrogen is produced in the place of demand, with an industrial production facility every 
Piping.
For process metal piping at pressures up to , high-purity stainless steel piping with a maximum hardness of 80 HRB is preferred. This is because higher hardnesses are associated with lower fracture toughness so stronger, higher hardness steel is less safe.
Composite pipes are assessed like:
Fiber-Reinforced Polymer pipelines (or FRP pipeline) and reinforced thermoplastic pipes are researched.
Carrying hydrogen in steel pipelines does not lead to hydrogen embrittlement. Hydrogen is typically stored in steel cylinders without problems.
Coal gas (also known as town gas) is 50% hydrogen and was carried in cast-iron pipes for half a century without any embrittlement issues.