[1][2][3][4] It was used by Gazprom for gas deliveries through Balkan countries to Turkey.
Pipelines of the southern corridor of the natural gas transmission system of Ukraine are connected with the Trans-Balkan pipeline through the Orlivka gas metering and compressor station.
[5][6] Since 2020, its section in Bulgaria from Malkoçlar on the Turkey–Bulgaria border[7] up to the compressor station in Provadia, north-east of Bulgaria, has been used for transportation of natural gas received from TurkStream.
[8] It can also be used in reverse mode to receive Azerbaijani gas via the Trans-Anatolian pipeline,[9] with a capacity of 17[10] to 20[11] or 25 bcm per year.
[15][16] Ukraine has proposed that flow should be permanently south to north.