Bulgaria-Serbia Interconnector Gas Pipeline

From Global Energy Monitor
This article is part of the Global Fossil Infrastructure Tracker, a project of Global Energy Monitor.

The Bulgaria-Serbia Interconnector Gas Pipeline, also called the IBS Interconnector and the Nis-Sofia Gas Pipeline, is a proposed pipeline in Bulgaria and Serbia.[1]


The pipeline will run from Nis, Serbia to Sofia, Bulgaria.[2] The exact route appears in the European Commission's March 2018 update on the project[3]and page 74 on Bulgartransgaz network development plan.[4]

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Project Details

  • Owner: Bulgartransgaz, Gastrans
  • Proposed capacity: 1.8 billion cubic meters a year
  • Diameter: 700 cm/ 28 inches[5]
  • Length: 170 km / 105.63 miles[6]
    • Bulgarian Section: 62.2 km / 38.6 mi[3]
    • Serbian Section: 108 km / 67 miles[6]
  • Status: Proposed[6]
  • Start Year: 2022[3][7]
  • Financing: EUR 49.6 million European Commission grant to Serbia[1]; EUR 25 million European Investment Bank loan for the Serbian section[8]; a EUR 27.6 million grant to Bulgaria from the Connecting Europe Facility.[9]


The Bulgaria Serbia Interconnection will have a capacity of 1 to 1.8 billion cubic metres a year from Bulgaria to Serbia, and 0.15 billion cubic metres a year from Serbia to Bulgaria. The project forms part of the EU’s Projects of Common Interest (PCI) and is being treated as a priority for the Central and South Eastern Europe Energy Connectivity High Level Group (CESEC). The pipeline will provide a new supply route from Bulgaria to Serbia, as well as to other parts of the South-East European region, enabling access to liquefied natural gas (LNG) from Greece, Azeri gas from the Southern Gas Corridor, and gas from Black Sea offshore production.[1]

Its European Network of Transmission System Operators for Gas TYNDP code is TRA-F-137.[10]


The European Commission is funding the Serbian side of the pipeline with a grant of EUR 49.6 million[1], and the European Investment Bank approved a EUR 25 million loan in December 2018 for the construction of the Serbian section.[8] In 2020, Bulgaria was awarded a EUR 27.6 million grant under the Connecting Europe Facility for construction works.[9]

One of the project promoters, Bulgartransgaz, a state-owned gas transmission system operator, announced in September 2020 that it had borrowed EUR 455 million from banks to finance various key projects such as the Bulgaria-Serbia Interconnector. Bulgartransgaz signed loan agreements with ING Bank, Citibank Europe, Raiffeisenbank Bulgaria, UniCredit Bulbank, the International Bank for Economic Co-operation, Eurobank Bulgaria, DSK Bank, and a consortium comprising state-owned Bulgarian Development Bank and the International Investment Bank.[11]

Articles and resources


  1. 1.0 1.1 1.2 1.3 EU investment in gas interconnection between Bulgaria and Serbia to enhance energy security in the region European Union, May 17, 2018
  2. European Network of Transmission System Operators for Gas (October 2020). "TYNDP 2020 - MAP – Transmission" (PDF). ENTSOG. Retrieved December 4, 2020.
  3. 3.0 3.1 3.2 Gas interconnection, European Commission, March 2018
  4. Bulgartransgaz EAD (March 2020). "2020 - 2029 TEN-YEAR NETWORK DEVELOPMENT PLAN OF BULGARTRANSGAZ EAD" (PDF). bulgartransgaz.bg. Retrieved September 25, 2020.
  5. ENTSOG. "Pipelines including Compressor Stations". ENTSOG.EU. Retrieved August 14, 2020.
  6. 6.0 6.1 6.2 European Network of Transmission System Operators for Gas (November 25, 2020). "TYNDP 2020 Annex A.2 – Project Tables". ENTSOG. Retrieved December 2, 2020.
  7. Bulgartransgaz EAD (March 2020). "2020 - 2029 TEN-YEAR NETWORK DEVELOPMENT PLAN OF BULGARTRANSGAZ EAD" (PDF). bulgartransgaz.bg. Retrieved September 25, 2020.
  8. 8.0 8.1 GAS INTERCONNECTOR NIS-DIMITROVGRAD-BULGARIA, European Investment Bank, Dec. 3, 2018
  9. 9.0 9.1 List of actions selected for receiving financial assistance under the CEF Energy Call for Proposals 2020, European Commission, accessed Nov. 24, 2020
  10. European Network of Transmission System Operators for Gas. "Not-modelled projects - entsog". ENTSOG.eu. Retrieved August 24, 2020.
  11. Mario Tanev, Bulgartransgaz borrows 455 mln euro, in loan talks with two more banks - report, SeeNews, Sep 18, 2020

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