Natural Gas Transmission System of Greece
Client: Public Gas Corporation of Greece (DEPA) S.A.| Country: Greece| Period: 2002
Scope of work:
The Natural Gas System (NGS) will transport Russian gas from the Greek-Bulgarian border near Promakhon and Algerian gas from a LNG terminal on the island of Revithoussa, to the consumer market within mainland Greece.
The project comprises of a number of discrete systems, the most important ones being:
A High Pressure Main Pipeline (36” / 30” diameter) running from the Bulgarian border to Patima, just north of Athens (approximately 500 km) and a high-pressure pipeline (30” diameter) from Revithoussa island at the western end of the Gulf of Salamina also running to Patima. The pipeline route from Revithoussa island includes two 24”, 600m long submarine pipelines
High Pressure Branch Pipelines running from the main pipelines to Kavala/Komotini, Thessaloniki Hellenic Petroleum Industrial Complex, Plati Imathias, Volos, Inofita, Lavrion and Keratsini
A Border Station on the main pipeline at Strymonochori comprised of Metering facilities, Dehydration Units (optional) and an Operation & Maintenance Centre.
Three Operation and Maintenance Centers on the main pipeline route, to monitor and control the operation of the system and as bases from which to undertake maintenance.
Metering and/or Pressure Reducing Stations along the main pipeline route and the high-pressure branch lines.
A Remote Control & Communication (RCC) System, comprising data acquisition interfaces along the pipeline, fiber optic cable for voice and data communication, with computer hardware and software installed in the operational control centers. Communication from any point along the pipeline routes will be effected by means of a combination of hard-wired communication, portable and car mounted radio phones.
Medium Pressure (19 Bar) Ring Mains in the Athens, Thessaloniki, Kavala, Xanthi, Serres, Drama, Volos, Larissa, Lamia, Livadia, Halkida, Inofita and Thriassio areas connecting the high pressure distribution systems.
For the implementation of the project, Asprofos’s scope of work involved:
- basic design (for all the parts of the system)
- detailed engineering (for main pipeline, Kavala/Komotini branch, Inofita branch, Keratsini branch, Plati branch, and branch of Thessaloniki Hellenic Petroleum Industrial Complex)
- preparation of material requisitions/technical packages for inquiries
- preparation of technical volumes for tenders
- technical evaluation of bids
- review and commenting / approval of contractors engineering activities
- review and commenting / approval of vendor’s drawings
- contact with authorities and assistance to permits and land acquisition
- technical support to customer
- environmental impact studies preparation (Komotini branch, Inofita branch)
- construction supervision of construction works
- services during commissioning / start-up / operation of the works
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