Gas-transit and pipeline coercion

Gas-transit and pipeline coercion is the purposive use of pipeline access, flows, tariffs or infrastructure decisions to impose costs or alter another actor's conduct. It is narrower than an interruption in supply. Contract expiry, commercial dispute, maintenance, physical damage and market shortage can all change flows without establishing coercive intent.

Actors and infrastructure

Pipeline trade separates several roles: producer, exporter, shipper, transit-system operator, pipeline owner, buyer and regulator. One state may influence several roles without controlling all of them. The physical route also matters. Entry and exit capacity, reverse-flow capability, storage, interconnectors and liquefied-natural-gas access determine whether Energy-supply throttling creates leverage.

The major Eurasian cases are described through Cross-border oil and gas pipelines: Nord Stream, Druzhba and Power of Siberia. The Russia-Ukraine gas supply and transit disputes (2006 and 2009) involved contested prices, debts and transit arrangements, with downstream effects in Europe. Allegations of political coercion should be attributed to the relevant government or supported by documented instructions, rather than inferred from a price or volume change.

United States sanctions concerning Nord Stream 2 (2017-2022) used a different mechanism: legal restrictions and threatened penalties affected companies involved in constructing or servicing a pipeline. That is not the same as a supplier reducing gas flow through an operating route.

The end of Ukrainian transit

The 2019 Russia-Ukraine transit arrangements expired on 31 December 2024. Gas TSO of Ukraine stated that Russian gas transit through the Ukrainian system ceased from 1 January 2025. The European Commission reported on 2 January that there was no immediate regional security-of-supply concern, citing alternative routes, storage and infrastructure. Its first-quarter 2025 market reporting later recorded a sharp fall in Russian pipeline imports.

These facts should not be compressed into a single coercion claim. The agreement's expiry, Ukraine's operation of its network, Gazprom's export role, remaining routes, buyers' contracts and wider war are distinct. The stopped route was not proof that every Russian pipeline flow to Europe ended.

Assessment and defence

Coercive assessment should identify the actor, controlled decision, stated or evidenced objective, target dependence, alternative routes and counterfactual flow. Price movements require controls for weather, storage, demand and other supply. Defensive measures include diversification, interconnection, storage, demand response, contractual flexibility and alternative import infrastructure. These reduce but do not eliminate exposure, particularly where replacement supply is costlier or capacity-constrained.

Evidence and sequencing

Evidence is strongest when operational conduct aligns with a documented demand or threat and the actor accepts material commercial cost to sustain pressure. Contract notices, regulator decisions, nomination data and physical flows can establish what changed. Political statements can establish an objective. Neither source alone necessarily connects the interruption to compellence.

Timing should be reconstructed at daily or contractual resolution where possible. A pipeline may have capacity while shippers nominate no gas; an operator may reduce capacity for maintenance while a supplier separately withholds volumes. Aggregate monthly imports can conceal those differences. Infrastructure damage requires engineering and investigative evidence before attribution.

Success should be judged against the stated objective, not the size of a price spike. A target may incur high costs yet maintain policy, or concede while broader market conditions also change. Coalition transfers, subsidies and emergency regulation can shift the incidence away from the intended target.

Sources

1. Gas TSO of Ukraine, Ukrainian GTS operating without Russian gas transit, 1 January 2025.
2. European Commission, No gas-supply concerns in the new year, 2 January 2025.
3. European Commission, Security of gas supply (accessed 30 July 2026).
4. European Commission, First-quarter 2025 gas-market report summary, 4 July 2025.