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Nord Stream AG

Nord Stream Pipeline Design Review

Project Overview

The Nord Stream Project consists of twin 48” pipelines passing through the Gulf of Finland and the Baltic Sea from Portovaya Bay, North of St. Petersburg (Russia) to Griefswald in Germany, each approximately 1200km in length.  The pipeline routes pass through the territorial waters of Russia, Denmark and Germany, and through the exclusive economic zones (EEZ) of those countries as well as Finland and Sweden.   The total capacity of the twin pipelines is 55BCM/yr.

Scope of Services

Consub provided a number of specialist engineers to support Nord Stream’s engineering team during the detailed design and follow on engineering stages of the project.  The work included technical reviews of detailed design deliverables from the company’s design contractor (Saipem Energy Services) based in Fano.

The following pipeline sections were included:

  • Land fall and onshore valve/pig trap stations including:
    • Piping and valves
    • Anchor blocks
    • Foundations
    • Structures
  • Offshore section including:
    • Pipeline design
    • On bottom stability and weight coating design
    • Freespan analysis and intervention design
    • Global buckling and intervention design
    • Hyperbaric tie-in foundation design
    • Cable crossing designs
    • Quantitative Risk Assessments  
    • Installation engineering
    • Installation procedures

The design was reviewed for the following:


  • Fitness for purpose and compliance with relevant design codes, project Design basis and specifications
  • Integrity through design life.
  • Constructability
  • Testing philosophy
  • Commissioning
  • Operability