Pipelines are widely viewed as the cheapest option for transporting large volumes of hydrogen over land, especially when compared with trucking compressed gas or converting hydrogen into ammonia and back again. Most large-scale modeling exercises, however, draw on generic cost curves, frequently derived from natural gas pipeline data and adjusted upward by a fixed factor to account for hydrogen’s unique material challenges. The new analysis shows that such averages can obscure differences of a factor of two or more between regions, differences large enough to change which hydrogen supply chains make economic sense in a given country.

At the heart of the study is a decomposition of pipeline costs into their physical and institutional components. On the physical side, terrain matters enormously. Building a pipeline through mountainous regions requires tunneling, aerial crossings, and extensive slope stabilization, all of which inflate capital expenditure per kilometer. Urban corridors demand costly routing around dense settlements, deeper burial depths, and additional safety clearances because hydrogen’s wide flammability range and low ignition energy raise concerns that regulators treat more conservatively than those for natural gas. Crossing rivers, canals, railways, and highways adds specialized engineering at every interruption, and in some regions the sheer density of such obstacles multiplies unit costs well above the levels assumed in global models.

Geology and climate add further layers of variation. Corrosive soils and high water tables accelerate degradation of steel and require more robust coatings and cathodic protection systems. Seismic zones demand flexible joints and reinforced design standards. In permafrost or areas with extreme seasonal temperature swings, ground movement can stress welds and valves, prompting thicker-walled pipe and more frequent inspection regimes. None of these factors is exotic; each is routine in pipeline engineering. Yet because hydrogen-specific datasets are sparse, modelers have historically lacked the regional resolution to capture them, leading to systematic underestimates of cost in precisely the regions, often in the Global South and in geologically challenging terrains, where cheap renewable electricity might otherwise make hydrogen production most attractive.

The political dimension of the analysis is arguably its most novel contribution. The cost of a pipeline is not determined by steel and labor alone but by the institutional environment in which it is built. Permitting timelines differ by orders of magnitude across jurisdictions: in some European countries, a new transmission pipeline can spend a decade in environmental review, judicial challenge, and multi-agency consultation, while in others, streamlined approval regimes allow construction to begin within a couple of years. Each year of delay carries a real financial cost through financing charges, inflation, and deferred revenue, and the researchers show that these time-related costs can rival or exceed the physical construction cost premium of difficult terrain.

Regulatory frameworks also shape costs directly. Standards governing pipeline design, operating pressure, odorization requirements, and proximity to buildings vary widely, and some jurisdictions have not yet finalized hydrogen-specific codes at all, creating uncertainty that deters investment and raises the cost of capital. Rights-of-way acquisition depends on land ownership structures and compensation norms; in countries with fragmented landholdings or strong customary land rights, negotiating a continuous corridor can be slow and expensive. Tariff regulation matters too, because the business case for a hydrogen pipeline typically rests on guaranteed long-term throughput, and the degree to which regulators allow capacity risk to be socialized across users, or borne by the pipeline owner, changes the required rate of return and therefore the delivered cost of hydrogen.

By combining geographic information system data on terrain, land use, population density, and water bodies with country-level indicators of permitting duration, regulatory maturity, and political stability, the researchers construct regionally differentiated cost estimates that reveal a strikingly uneven global picture. Coastal industrial clusters in some regions emerge as far cheaper to connect than generic models predict, while landlocked renewable-rich areas, often touted as future hydrogen export powerhouses, face pipeline costs that erode a substantial share of their production advantage. The findings suggest that the geography of future hydrogen trade may be determined as much by corridors, codes, and courts as by the price of electrolyzers and renewable electricity.

Repurposing existing natural gas pipelines, frequently cited as a way to slash hydrogen transport costs by well over half, also receives a more nuanced treatment. The study emphasizes that reuse is not uniformly feasible: older pipelines built before modern integrity standards, those made of materials vulnerable to hydrogen embrittlement, and those traversing areas where hydrogen blending rules remain unsettled may require extensive assessment, repair, and upgrading before conversion. The economics of repurposing therefore inherit the same regional sensitivities as new construction, and blanket assumptions that existing networks can absorb hydrogen cheaply could misdirect both policy support and private investment.

For policymakers, the implications are concrete. Reducing permitting timelines and providing legal clarity on hydrogen pipeline regulation can deliver cost reductions comparable to years of anticipated technology learning, and doing so costs governments far less than subsidizing hardware. Coordinated corridor planning, early community engagement, and harmonized cross-border standards for interconnected networks are identified as high-leverage interventions. For modelers and investors, the message is that region-specific cost inputs should become standard practice, since the difference between a viable and a marginal hydrogen project may lie less in the electrolyzer stack than in the ground it crosses and the institutions that govern it.

As governments finalize billions of dollars in hydrogen infrastructure funding, the study offers a timely corrective to optimism grounded in global averages. The hydrogen economy of the coming decades will be built pipe by pipe, permit by permit, and country by country, and its true cost will be written not in spreadsheet defaults but in mountains, soil, courts, and regulatory codes. Recognizing that heterogeneity, the authors argue, is the first step toward infrastructure planning that is both financially realistic and strategically sound.

Subject of Research: Regional geographical and political determinants of hydrogen pipeline costs

Article Title: Exploring hydrogen pipeline costs by considering regional geographical and political characteristics

Article References: Weißenburger, B., Karkossa, L., Stephan, A., & McKenna, R. (2026). Exploring hydrogen pipeline costs by considering regional geographical and political characteristics. Nature Energy. https://doi.org/10.1038/s41560-026-02141-3

Image Credits: AI Generated

DOI: 10.1038/s41560-026-02141-3

Keywords: hydrogen, pipelines, hydrogen economy, infrastructure costs, permitting, energy transition, regulatory frameworks, pipeline repurposing, geography, energy policy, Nature Energy, decarbonization