Quantity and Pressure limitation

This LAP¨refers to the quantity and pressure limitations. It underlines what are the requirements and limitations in terms of pressure and quantity of hydrogen for hydrogen transport. Finally, it shows if it is possible to increase the pressure/quantity, and if yes which authority is competent, what is the process to follow, how long does it takes and what are the costs associated if known.

Glossary:

Quantity and Pressure limitation represent the maximum quantity and/or pressure of gases which is allowed to be transported.

Pan-European Assessment:

There is no limitation in terms of pressure, (mostly transported at around 200-300 bars) In terms of quantity, the limitation is connected to the maximum weight the truck can transport.
Is it a barrier?
Yes
Type of Barrier
Structural barrier
Assessment Severity
2
Assessment
Within the EU different parameter values exist and it is preferable to align, for instance max operating pressure of tube trailers. Costs of transport of hydrogen, economic impact due to the differences in the EU and the current pressure limitation might become a barriers due to the developments/innovations

Questions:

Question 1 What are the pressure requirements and limitations accepted for hydrogen transport by road?
The classic industrial transport of hydrogen is at 200 bar pressure and up to 300–400 kg per truck in steel tubes. The more innovative transport of hydrogen for transport applications can be done at 500 bar up to 1100 kg per truck in carbon tubes. The weight maximum is at 44 ton truck weight overall. The ADR does not explicitly state a certain maximum pressure or temperature for the technical unit but a reference to standards. After inquiring a supplier of hydrogen cylinders, it is indicated that the working pressure is an important factor. The operating pressure is the pressure of a compressed gas at a reference temperature of 15 °C in a full gas cylinder. ISO 11119-3 indicates the conditions under which the cylinder can be designed with which operating pressure. The standard therefore indicates the design conditions. It has been indicated that 300 bar is an economically interesting workload for the design and that this 300 bar is therefore regularly used as a working pressure.
Question 2 What are the quantity requirements and limitations accepted for hydrogen transport by road?
No quantity limitations but limitations on how much can you carry given the size and weight limits of the truck
Describe the comparable technology and its relevance with regard to hydrogen
Other industrial gasses and all PED equipment

National legislation:

EU Legislation: