DNV GL releases new subsea pipeline guildelines

The new RP, DNVGL-RP-F114 ‘Pipe-soil interaction for submarine pipelines’, has been launched to guide the important role of soil characterisation and pipe-soil interaction assessments on pipeline projects.

Depending on the interaction between the pipe and the soil, exposed and buried submarine pipelines may be subject to severe displacements and impaired pipeline integrity.

Pipe-soil interaction assessments are usually complex and the results can cause uncertainty, compared to traditional foundation designs, due to limitations in soil data along the pipeline route, difficulties in characterisation of the soil close to the seabed, dynamic pipeline installation, and subsequent design scenarios involving large displacements.

DNV GL has collected, aligned, and reviewed existing guidance, considering recent research, to develop DNVGL-RP-F114, which provides holistic guidance and recommendations within a geotechnical framework.

“Geotechnical competence is required to understand the complex soil behaviour close to the pipe during installation and operational conditions, in addition to managing the inevitable uncertainties related to limited soil data and to simplifications in the engineering models,” said DNV GL Oil & Gas Senior Geotechnical Engineer Jens Bergan-Haavik.

“The pipe-soil RP highlights the value of geotechnical input in projects to ensure robust pipeline design solutions.

“The RP also provides recommendations on how to safely avoid over-conservatism through specification of state-of-the-art laboratory tests.”

The new RP will replace the pipe-soil interaction guidance given previously in:

  • DNVGL-RP-F105 Free spanning pipelines
  • DNVGL-RP-F107 Risk assessment of pipeline protection
  • DNVGL-RP-F109 On-bottom stability design of submarine pipelines
  • DNVGL-RP-F110 Global buckling of submarine pipelines
  • DNVGL-RP-F111 Interference between trawl gear and pipelines
  • DNVGL-RP-F113 Pipeline subsea repair

For more information visit the DNV GL website.

If you have news you would like featured in Pipelines International contact Assistant Editor Nick Lovering at nlovering@gs-press.com.au

Images courtesy of DNV GL

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