Gas Transmission Pipelines

Pipelines Construction Method Study – Nord Stream2

Nord Stream 2 (NSP2) engaged CONSUB to provide engineering services on the Russian Onshore Pipeline Construction Assessment at Narva Bay, Russia.

The proposed Narva Bay Landfall Pig Trap Area site and onshore 2 No. 48-inch pipelines for NSP2 is located within the Kurgalski Protected Area, a designated Nature Sanctuary with Regional Protection Status, and a designated Internationally Protected Area (RAMSAR Convention). In this regard, it is important that any potential environmental impacts associated with pipeline construction activities are minimised through the nearshore area, the beach and intertidal zone, the coastal forest belt and onshore wetlands.

Scope of Services

CONSUB are performing a desktop constructability review for the various pipeline construction methods (Open-cut and trenchless methods) that could be adopted to install the new NSP2 pipelines in the onshore and nearshore areas of Narva Bay, Russia.

Technical issues were highlighted to identify construction risks and the impact these may have on the environment, project schedule and overall costs. For construction by trenchless methods, six trenchless options were assessed for the onshore pipeline route and shore approach.

The six trenchless options assessed were:

  • Horizontal Directional Drilling (HDD);
  • Micro tunnelling (Pipe jacking);
  • Tunnelling (Segmental);
  • Direct Pipe;
  • Auger Boring;
  • Pipe Express (Semi-Trenchless).

CONSUB provides a team of multi discipline engineers covering pipelines, civil construction and tunnelling based in our Hampton Court Office, London and in NSP2 office in Zug, Switzerland