IGB Pipeline

The national energy regulatory authorities of Greece, Bulgaria, Romania, Moldova and Ukraine have approved the new capacity products Route 2 and Route 3, strengthening regional connectivity and security of supply. Developed with ICGB as a key driver, the routes enable deliveries from diversified sources using existing infrastructure - LNG via the Alexandroupolis FSRU and pipeline gas via the Trans Adriatic Pipeline (TAP), with the IGB interconnector playing a central role along the south-north corridor.

Since the start of commercial operations on 1 October 2022 and up to the end of October 2025, the cumulative transported quantities through the IGB pipeline reach 39 854 049 MWh Greece to Bulgaria and 1 919 228 MWh in virtual reverse flow to Greece. For the period January–October 2025 alone, the quantities reached 8,486,142 MWh from Greece to Bulgaria and 153,062 MWh in reverse flow. The interconnector has established itself as the first route for diversified natural gas supplies to Bulgaria, providing over 50% of the country’s domestic consumption.

The interconnector has a strong regional impact as a central component of the Vertical Gas Corridor - an initiative designed to support scalable, bidirectional gas flows from South to North, enhancing access to LNG and other diversified sources for countries across the region. The independent transmission system operator ICGB continues its active engagement with partners to enable the launch and implementation of Routes 2 and 3  which will further strengthen regional energy security and provide new opportunities for delivering gas to markets such as Moldova and Ukraine at a time of increased strategic importance. The newly introduced capacity products are a flexible market solution that reflects the changed energy security dynamic in the region.