MOSCOW, July 10 (Reuters) - Russia's offline primary oil refining capacity has been revised up by 38% for July from the previous plan to 2.326 million tonnes, according to data from industry sources and Reuters calculations.

The revision follows several changes in Russian oil refineries' maintenance schedules.

In June Russia's offline primary oil refining capacity was at 3.966 million tonnes, down by 0.824 million tonnes on May, according to the data and Reuters calculations.

(Reporting by Reuters, Editing by Louise Heavens)