North-South Gas Corridor – Expansion of existing capacity between Hungary and Slovakia

Year registered: 2020
3SI countries proposing the project:


Participating 3SI countries:

Austria, Czechia, Poland, Croatia, Hungary, Romania, Slovakia

Partner countries:

Ukraine, Serbia

* not part of the 3Seas Initiative
Main objectives:
  • The capacity extension would create a bidirectional interconnection point, which increases the security of supply in Hungary and offers a new route to Southern sources (LNG, Black Sea, Balkan Stream, Azeri) towards North and West.
Short description:

The present capacity of the interconnector in the direction of Slovakia-Hungary is 4.4 billion cubic metres per year (bcm/y) and in the direction of Hungary-Slovakia is 1.75 bcm/y. The capacity expansion towards Slovakia up to 5.2 bcm/y would mean a significant step in the development of the North-South Gas Corridor.

Calendar of implementation:
  • Planning
    • Action & Economic test: 6 July 2020
    • FID: 2020 Q3
    • Engineering and Construction start: 2021 Q2
    • Construction end: 2024 Q3
    • Commercial start: 1/10/2024
To be determined
Financing sources:
To be determined