Most gases have to be stored and distributed either under great pressure, which requires them to be carried in heavy and bulky cylinders, or at extremely low temperatures in specially insulated road tankers or vessels, which limits how far they can be transported before carriage costs become unacceptable.
Pipeline involve high capital costs and routing can be inflexible.
Compact cryogenic and noncryogenic plants are normally located on a customers site, close to the point of use.