NABUCCO Natural Gas Pipeline Project Between Turkish/Georgian Border (Posof) - Ankara Pipeline Section Engineering Services

Brief Project Description :

The Nabucco Natural Gas Pipeline Project covers high-pressurized pipeline and associated structures for transmission of natural gas 31 billion m³/y, scheduled for supply from the Middle East and Caspian countries for 50 years, to Austria via Turkey-Bulgaria-Romania-Hungary.

The pipeline length is approximately 4,000 km, starting at the Georgian/Turkish and Iraqi/Turkish border respectively, leading to Baumgarten in Austria.

Nabucco Pipeline Turkish Section including the Feeder lines is totally app. 2,500 km.

The main figures of the Turkish/Georgian Border (Posof) - Sivas - Ankara of the Nabucco Pipeline are as follows:

Pipeline:

Section  : Turkish/Georgian Border (Posof) - Sivas - Ankara
Section length  : 1,100 km
Pipeline Diameter : 48” (DN 1.200), 56” (DN 1.400)
MAOP   : 100 barg

Station facilities:

• Compressor Station: 4 Nos
• Metering Station: 1 fiscal metering at border
• Block Valve Stations: 31 Nos  block valve stations
• Pigging launcher and receiver facility: at Compressor / Metering Stations

Scope of Services:

• Detailed route surveys (in the light of basic criteria, e.g. ecological, sociological, topographical, economical criteria and ease of construction), and determining the final pipeline axis,

• As a part of geodesic and photogrammetric studies along the full length of pipeline route, stripwise map production on the basis of ortho-photo and LIDAR procedures, and preparation of plane-charts for special structure and river crossings and on sites of above-ground installation (AGIs) (e.g. compressor stations, pipeline valves, metering stations, pigging stations etc.),

• For the whole route, including sites of AGIs, implementation of a comprehensive geotechnical investigation programme and preparation of engineering geology reports,

• Carrying out specific hydrological studies on river crossing along the full length of pipeline,

• Engineering design and preparation of construction technical specifications and BoQs for the pipeline (onshore + offshore), structures / techniques of intersections with other facilities as well as for the AGIs (e.g. compressor stations, pipeline valves, metering stations, pigging stations etc.),

• For the complete pipeline, cathodic protection (against corrosion) design, and providing support to SCADA operation system design,

• Preparation of land acquisition plans and drawings comprising the complete pipeline route, further to carrying out land ownership valuation studies,

• EIA Studies as per the local legislation of each country and obtaining EIA “No Objection” decision; furthermore, preparation of the national section of the “Consolidated Project Environmental and Social Impact Report” to be submitted to international financing institutions,

• Contacts with associated public institutions and agencies, and obtaining legal permissions, along the pipeline route, and

• Data acquisition for recording in the GIS developed for 5 transit countries, and recording the data in the Project Data Platform.