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Table 1 – Data on Existing Offshore Pipelines in North Europe eligible for repurposing to H and CO
2
2
Transport (ref. Re-Stream study)
In 2021 a study, In addition, the new scenarios oblige to R&D effort was required. The second phase was
Re-stream, a transformation in the design focused to design and start filling the gaps. Some case
commissioned by approach that should primarily consider studies were selected for new or repurposed offshore
important O&G that some of the new molecules to be pipelines to transport H or H /NG or CO . The study
2
2
2
associations, transported have an interaction with cases for pure hydrogen considered a new pipeline
analysed the integrity of the pipe material itself. transporting hydrogen from an offshore electrolyser to
the feasibility of Therefore, as part of the change, it is to shore, while for hydrogen blended with natural gas it
repurposing the be considered the testing of material was analysed the re-use of an existing offshore pipeline
European gas and properties under various conditions, to in the Mediterranean sea. The study case for CO
2
oil infrastructure to support and provide a strong scientific considered the reuse of an existing flowline system
transport Hydrogen base to the standardization process of between two platforms and the shore, reversing the
or CO the design. flow direction to transfer captured CO from land
2 2
industrial sources to subsea injection and storage. The
Table 2 below presents the main characteristics of all
Advancing the innovation the case studied within the research program.

process in technology
To fill some knowledge and technological gaps and to
After a preliminary state of art review, it was recognized conduct experimental test campaign, a cooperation
that there were gaps to be filled from a technological with research entities and laboratories, like Politecnico
point of view and a roadmap was established to fill di Milano and RINA, was started including the active
them. All engineering disciplines of offshore pipeline participation to an important Joint Industry Project,
design were involved in this process considering DNV (Det Norske Veritas) JIPH2Pipe (Joint Industry
both JIP adjoining and experimental test campaigns. Project on Hydrogen Pipelines).
The intent was to be methodical and pragmatic, with a The third phase is ongoing with the ultimate objective
learning by doing approach. to provide data and information to the engineering
The innovation plan was organized in three phases disciplines involved in pipeline design, to develop
(Picture 3), each including various work packages. recommendations and guidelines or procedures and fit
The first phase was dedicated to deepening knowledge for purpose design tools, to consolidate a network of
on the two fluids and identify the gaps where additional suppliers ready for the new scenarios, to elaborate and

Picture 3 – Saipem
R&D Program on H
2
and CO Pipelines
2
Offshore - Activities
Breakdown

IndustrIal Plants - May 2023
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