Natural Gas Pipeline Komotini – Alexandroupolis – Kipi

Client: Public Gas Corporation of Greece (DEPA) S.A.| Country: Greece| Period: 2007

A new High Pressure Gas Transmission Pipeline (Ö36") of approx. 86 Km, which will transport Natural Gas from Turkey to Greece (from the Greek/Turkish borders to Alexandroupolis and up to Komotini) is now under construction.

The scope of the project is the implementation of a "bi-directional" High Pressure Gas Transmission Pipeline connecting Komotini (through Alexandroupolis) with the Turkish High Pressure Gas Transmission Pipeline at the Greek/Turkish Border in the area of Kipi.

With the completion of the project, the pipeline will provide the following alternative possibilities:

  • To supply the major area of Alexandroupolis and the Power Company ENELCO at Alexandroupolis area from the existing Greek Natural Gas Transmission System or
  • To supply the Greek Natural Gas Transmission System with gas received from the Turkish Natural Gas transmission System through the Border Metering Station in the area of Kipi.

The Project shall be designed, fabricated, tested and commissioned in accordance with the requirements of ASME B31.8. "Gas Transmission and Distribution Piping Systems".

The project includes:

  • A 36" underground cathodically protected steel pipeline of total length 86 km with design pressure 80 barg (Section 1: Alexandroupolis – Komotini: 53 km, Section 2: G/T Borders – Alexandroupolis: 33 km).
  • One Scraper Station
  • Four Line Valve Stations
  • Two Scraper Stations

Scope of Work

Design / Engineering

Basic Design, Detailed Engineering, Environmental Impact Study and Safety Study, as well as Detailed Surveying Works and Cadastral Tables and Drawings

  • Basic Engineering: Preparation of the final pipeline routing and the design basis for the process / instrumentation issues according to which, the detail engineering proceeded. This included final pipeline routing, contacts expedition with Authorities, process Basic Design of the pipeline system, M.T.O. material requisitions, Technological Assessment of pipe materials, Basic Electrical and instrumentation design, Geological investigation, Cost Estimation and Project Management documentation.
  • Environmental Impact Study (EIS): Preparation of a substantial and specifically  efficient study regarding the investigation of the environmental impacts, which should affect the environmental concern systems, due to the construction and operation of the gas pipeline. This involves legislative restrictions, Contacts with Authorities, Environmental Systems Investigation, Environmental and Management Plan.
  • Safety Study: Preparation of a substantial and scientifically efficient study regarding the investigation of the safety levels, which are related with the gas pipeline to be commissioned, anal using the potential risks and the relevant consequences during the operation stage of the project. This entails the formation of the safety study objectives, a risk analysis and risk analysis assumptions.
  • Authorities Investigation / Permits Acquisition: Investigation of the competent authorities for obtaining pipeline routing approval, as well as acquisition of all, required by the Law permits for the Project implementation (i.e. Installation Act) are CLIENT'S responsibility.
  • Geological / Geolechnical/ Geoelectrical/Seismic Studies: The design of the Greek/ Turkish Borders -Alexandroupolis – Komotini H.P. Natural Gas Pipeline requires the execution of Geological / Geotechnical and Seismic studies along the pipeline route. 

To assess and verify the suitability of the pipeline design through a complete seismic study ASPROFOS provided the following services:

  • Seismotectonic Analysis and Seismic Hazardous Assesment Study
  • Seismic / Pipe Schedule (Pipe Wall Thickness) Verification
  • Geological Studies
  • Cross-Hole Geo-technical Investigation – Geotechnical Investigation (Bore   Holes, Trial Pits, SPT, CPT, etc.)
  • Geo-electrical Study 
  • Engineering Project Management and Control
  • Construction

Two PC (Procurement/Construction) Contractors have been foreseen to

undertake erection activities under the Supervision of ASPORFOS, following the elaboration of the Detailed Engineering.