The Industrial Backbone: Why High-Pressure Infrastructure Is the Logical Starting Point for H₂
JAMES STEPHENS, Supercritical Solutions, United Kingdom
Hydrogen (H₂) is expected to play a central role in the global energy transition, but as projects move beyond demonstration scale, the industry faces an important question: Where should pipeline investment begin?
Rather than focusing on broad hydrogen deployment, pipeline operators should prioritize high-pressure transmission networks serving industrial clusters. Developing these backbone systems—ideally operating between 90 bar and 140 bar—can improve energy delivery, reduce compression requirements for customers and establish the infrastructure needed for a large-scale hydrogen economy.
Why Pressure Matters
Hydrogen presents unique transportation challenges compared with natural gas. At standard pressure, hydrogen contains roughly one-third of the energy per cubic meter (m³) of natural gas. Accounting for compression characteristics further widens that gap.
To deliver comparable energy volumes, operators must either transport significantly more hydrogen or increase operating pressure. Although higher gas velocities can partially offset the difference, long-distance hydrogen transmission ultimately requires higher operating pressures to avoid impractically large pipeline diameters.
Industry discussions have increasingly centered on 100 bar as a practical operating pressure for hydrogen transmission. That exceeds the approximately 70-bar operating pressures commonly associated with high-pressure natural gas pipelines. While 100 bar does not fully compensate for hydrogen's lower energy density, it provides a practical balance between system performance, material limitations and infrastructure costs.
The implication for pipeline developers is clear: high-pressure transmission should be deployed where hydrogen's physical characteristics make it essential rather than simply treating hydrogen as a direct replacement for natural gas.
Focus on Industrial Hydrogen Hubs
The most practical near-term strategy is developing localized hydrogen production connected to nearby industrial users through relatively short, high-pressure pipelines.
Industrial regions such as the U.S. Gulf Coast and Teesside in the United Kingdom already provide many of the characteristics needed for future hydrogen hubs.
Unlike residential applications—which remain largely undeveloped and require hydrogen at relatively low pressure—industrial users often require hydrogen delivered at elevated pressures for ammonia production, refining and sustainable aviation fuel (SAF) manufacturing.
Because these facilities operate continuously and cannot tolerate supply interruptions, many are expected to maintain onsite buffer storage supplied directly from high-pressure transmission pipelines.
Building pipeline backbones through these industrial corridors allows operators to deliver not only hydrogen itself but also the pressure required by many industrial processes.
Reducing Compression Requirements
One of the largest economic opportunities in hydrogen midstream infrastructure is reducing or eliminating compression requirements.
Traditional natural gas systems typically transport fuel over long distances using multiple compressor stations to maintain delivery pressure.
Hydrogen production follows a different model. Electrolyzers are often located closer to renewable energy resources and distributed production sites. Connecting multiple high-pressure production facilities to nearby industrial hubs through shorter transmission systems could significantly reduce—or even eliminate—the need for intermediate compression.
If hydrogen enters the transmission network at low pressure, pipeline operators must invest in additional compressor stations, increasing both capital expenditures (CAPEX) and long-term operating expenses (OPEX).
Advanced electrolysis technologies capable of producing hydrogen at elevated pressures offer another option.
Delivering hydrogen into the transmission network at 100 bar or greater eliminates initial compression while preserving energy that would otherwise be consumed during the compression process.
High-pressure production also aligns well with underground salt cavern storage, which commonly operates between approximately 80 bar and 200 bar, minimizing the additional energy required for storage injection.
Pipeline Storage Benefits
High-pressure hydrogen pipelines can also provide operational flexibility through line pack storage, much like existing natural gas systems.
Although hydrogen's compressibility results in roughly 20% lower line pack capacity than natural gas, operators can still vary pipeline pressure to store additional inventory within the system.
This capability helps offset fluctuations associated with renewable-powered hydrogen production while improving supply reliability for downstream customers.
Supporting Transportation
Industrial transmission systems may also benefit the transportation sector.
Residential applications generally do not require pressurized hydrogen, but heavy-duty truck and marine fueling stations typically dispense hydrogen at pressures between 350 bar and 700 bar.
Connecting fueling stations to a 100-bar industrial backbone rather than a low-pressure distribution system significantly reduces the energy required to achieve final dispensing pressures.
Building the Hydrogen Backbone
For pipeline developers, the roadmap centers on three priorities:
- Prioritize high-pressure infrastructure serving industrial users such as ammonia, methanol and SAF producers.
- Standardize around approximately 100 bar to balance regulatory requirements, material considerations and energy delivery.
- Deploy hydrogen production technologies capable of delivering pressurized hydrogen directly into the transmission system, reducing dependence on midstream compression.
Reducing compressor requirements lowers both capital investment and operating costs while improving overall system resilience.
Conclusion
Although hydrogen is expected to play a growing role across multiple sectors, widespread residential distribution remains a longer-term prospect.
Industrial demand offers the clearest and most immediate opportunity for pipeline development.
High-pressure transmission systems serving industrial clusters can efficiently transport hydrogen, improve storage flexibility, reduce compression costs and support critical manufacturing industries. By focusing investment on these industrial backbone networks, pipeline operators can establish the foundation for a scalable hydrogen economy.
About the Author
JAMES STEPHENS leads the Systems team at Supercritical Solutions, where he combines technical expertise with strategic planning to advance the commercialization of the company's electrolyzer technology. Before joining Supercritical, he worked in conventional energy with Genesis Energies and now focuses on scaling hydrogen systems that support the transition to lower-carbon energy.