Natural gas started flowing to Europe again on the Nord Stream 1 (NS1) pipeline Thursday after 10 days of maintenance, but flows could be cut further if key equipment to run the system at a higher capacity is not returned by next week.

Nord Stream AG said it successfully completed annual maintenance on the system. Nominations for Thursday were at roughly 40% of capacity. Large European buyers such as Uniper SE and Eni SpA confirmed they were receiving gas on the pipeline.

The system is moving about 2 Bcf/d – or roughly 60% less than its full capacity. Gazprom PJSC cut deliveries on NS1 last month citing mechanical issues at a massive compressor station. 

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