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Freespan Assessment and Remediation

Dynamic Span Analysis: Unravelling Freespans, Vortex Vibrations, and Remediation Insights

Embark on a journey of expertise with our 'Freespan Assessment and Remediation' course. Over two days, delve into critical aspects of freespans in subsea pipelines, starting with their formation, failure mechanisms, and span dynamics. Explore vital topics like vortex-induced vibrations, fatigue limit state assessment, and fatigue life calculations. You'll also gain proficiency in using advanced span assessment software like DNV FatFree, Plus-One, and SAGE Profile. The course culminates in a comprehensive look at remediation strategies, focusing on berm and mattress stability, and the prediction of future scour. This course is an invaluable resource for professionals seeking to deepen their understanding of subsea pipeline management in a practical, focused context

Interactive Learning

Interactive Learning
Engage in hands-on activities and utilise span-specific software. 

Industry insights
Industry insights
Gain industry insights into span dynamics.

Networking Opportunities

Networking opportunities

Network with like-minded individuals and industry experts working within span assessment. 

Enjoy exclusive access to Jeenius platform, a valuable learning resource.

Mastering Subsea Pipeline Freespan Assessment and Remediation: A Practical Approach

Through an array of practical examples, learners will develop expertise in the assessment and remediation of freespans in subsea pipelines. This proficiency is invaluable for industry practitioners, imparting the skills to identify, evaluate, and rectify freespans effectively, thus ensuring the dependability and integrity of subsea pipelines. Opting to study with us offers delegates a uniquely tailored learning experience, accentuating practical applications and equipping them to adeptly navigate real-world challenges in the subsea pipeline space.

Module Highlights

Day 1 - Unveiling Subsea Pipeline Freespans: Dynamics, Assessments, and Limit States

Delve into the intricate world of subsea pipeline freespans with a detailed exploration of formation methods and failure mechanisms. The journey continues as we unravel the dynamics of spans, investigating vortex-induced vibrations, failure modes, and the calculation of natural frequencies through an approximate response model. Gain insight into the presentation of response envelopes and an overview of assessment levels. The course progresses to screening assessments, where reduced velocity calculations are examined along with their applications and limitations. Concluding this exploration is a comprehensive look at ultimate limit state (ULS) assessments, covering static stress responses, global and local buckling, and third-party interactions.

Day 2 – Navigating Subsea Pipeline Freespans: From Fatigue Assessments to Remediation Strategies

Embark on a comprehensive exploration of subsea pipeline freespans with an in-depth examination of fatigue limit state (FLS) assessments. Uncover the intricacies of single and multi-mode responses, delve into cross-flow induced in-line vortex-induced vibrations (VIV), explore acceptance criteria, and navigate the calculations of fatigue life. The course proceeds to scrutinize span assessment software, including DNV FatFree, Plus-One, SAGE Profile, and Finite Element Analysis (FEA). Concluding this immersive journey is an insightful discussion on remediation, covering berm and mattress stability, along with the prediction of future scour scenarios.


Who should attend?

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

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

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
Subsea ROV

Start Dates

Location Start Date End Date Number of Days Timings
Virtual (Live Instruction)
8th October 2024
9th October 2024
09:00 to 16:30 (with regular breaks)

Your Pricing Path: Course or Course Bundle

Standard Access

Individual Course Access


  • Live Classes: Dive into live, interactive sessions focusing on real-time learning and discussions with peers and industry experts.

  • Access to Jeenius Platform: Unlock a realm of additional resources, peer forums, and expert interactions extending your learning beyond the classroom.

  • Industry Expert Interaction: Network and learn from seasoned industry professionals throughout the course, discussing real-world challenges and solutions.

Premium Access

Integrity Management Bundle

Unlimited lifetime access to all of our Integrity programmes.


For just £9,995, you'll unlock lifetime access to our full spectrum of integrity courses, a collection with a value exceeding £30,000.

This offer isn't just about diverse subjects like Integrity Management, Lessons Learned, Flexibles and Riser, and more; it's a gateway to limitless learning.

Enjoy the freedom to access all materials and attend live classes whenever you wish, from anywhere, at any time. Elevate your expertise on your terms and at your convenience, ensuring a dynamic and flexible educational journey


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