Freespan assessment and remediation - Oil and Gas

Virtual classroom

Available dates:
No dates currently planned - speak to our Training team


Specialisation course


About the course

Exploring integrity issues associated with subsea pipeline spans, this course will be of benefit to subsea and pipeline engineers involved in design, integrity management and operations. Referring to a range of worked examples, learners will gain a knowledge on assessment and remediation of subsea pipeline freespans.

Examining the various assessment methods used for both new and existing pipelines which are integral to the assessment and remediation of pipeline freespans, all the various methods are examined including the DNVGL-RP-F105 approach. Using the knowledge gained, learners will apply these assessments and review a series of case studies based on real-life scenarios using the lessons learnt.

At a glance

Available dates

No dates currently planned - speak to our Training team


2 days (14 study hours)


Virtual classroom




£1,500 plus VAT

Early Bird

Book up to six weeks in advance of the start date of your chosen course to take advantage of the Early Bird discount


Learning outcomes

  • Describe the integrity issues associated with pipeline freespans
  • Identify different levels of assessment and when to apply them
  • Complete a span assessment calculation in line with DNVGL-RP-F105
  • Identify when remediation is required and what repair options are available

Course structure

Day by day content

Day one

Introduction to freespans

  • Formation methods
  • Failure mechanisms


Span dynamics

  • Vortex-induced vibrations
  • Failure modes
  • Calculating natural frequencies (approximate response model)
  • Present response envelopes
  • Overview of assessment levels


Screening assessment

  • Reduced velocity calculation
  • Application and limitations


Ultimate limit state (ULS) assessment

  • Static stress response
  • Global buckling
  • Local buckling
  • Third party interaction

Day two

Fatigue limit state (FLS) assessment

  • Single mode response
  • Multi-mode response
  • Cross-flow induced in-line VIV
  • Acceptance criteria
  • Fatigue life calculations


Span assessment software

  • DNV FatFree
  • Plus-One
  • SAGE Profile
  • FEA



  • Berm stability
  • Mattress stability
  • Prediction of future scour

What past delegates have said

Jee provided me an insight into conservatism and wisdom to accept the assessment by consultants and take a prudent approach

Vijay Kamate, Total E&P

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Freespan assessment and remediation - Oil and Gas

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