GRASYS nitrogen stations supplied to the Gryazovets-Vyborg gas pipeline section

7 July 2011

GRASYS supplied its membrane nitrogen stations for Gazprom Transgaz Saint-Petersburg LLC, a subsidiary of Gazprom OJSC, to the Gryazovets-Vyborg gas pipeline section (Portovaya CS) comprising the Nord Stream gas transmission pipeline.

The two nitrogen stations supplied by GRASYS are each rated for production of 380 cubic meters of 95% nitrogen per hour for supply to the dry gas seals of gas compressor units (GCA).

The third station rated for production of 300 cubic meters of 95% nitrogen will be used for nitrogen supply to the gas pre-transport treatment plants. All the supplied stations are equipped with back up compressors.

GRASYS mobile nitrogen stations

GRASYS mobile nitrogen stations

GRASYS mobile nitrogen stations

GRASYS mobile nitrogen stations

The main part of the station ensuring its operating efficiency is the GRASYS new-generation membrane gas separation unit. Due to the advanced design solutions, the membrane unit has the optimum weight and dimensional characteristics, allows convenient reconfiguration and ensures the uttermost operational reliability of the nitrogen stations.

GRASYS nitrogen stations are equipped with the up-to-date microcontroller-based automated intelligent control system GRASYS Intelligent Control-7 fitted with the control console, active liquid-crystal display and «short» buttons for quick access to the most important functions.

GRASYS is the only Russian scientific and production enterprise having the unique 10-year experience in the production of mobile nitrogen stations widely used in the gas industry. Nitrogen stations find use in testing of the gas transmission pipeline linear part and purging of the pipeline support systems; testing and repairs of process equipment of the gas processing plants' (GPP), compressor stations (CS) and booster compressor stations (BCS).

For reference:

Construction of the Portovaya compressor station as part of the Gryazovets-Vyborg gas transmission pipeline was started in the Portovaya Bay, in vicinity of Vyborg, Leningrad region on 15 January 2010.

Portovaya CS is expected to secure gas transmission via the Nord Stream gas transmission pipeline. It will be a unique facility in the global gas industry as regards the aggregate capacity (366 MWt), operating pressure (220 atm), gas transmission distance (1,200 km), and the daily scope of dried gas (170 m m3). In the construction of the station, Gazprom relies on the most recent equipment and advanced technologies.

Part of the materials are taken from the Gazprom OJSC official web-site http://gazprom.ru/press/news/2011/june/article114351/.

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