South Stream Transport, a wholly-owned subsidiary of Gazprom, and Allseas Group have signed a contract to build the second string of the TurkStream gas pipeline’s offshore section.

The agreement, signed in Amsterdam, is part of the option included in the construction contract for the pipeline’s first string, which was signed in 2016.

Allseas plans to use Pioneering Spirit to lay more than 900 kilometers of pipes across the Black Sea seabed for the second string of the pipeline.

The first string of the TurkStream gas pipeline is intended for Turkish consumers, while the second string will deliver gas to southern and southeastern Europe.

Each string of TurkStream will have the throughput capacity of 15.75 billion cubic meters of gas per year.