Subsea Pipeline Free Span Online Live Zoom Course

Is it for me?

  • Pipeline design engineers; 
  • Pipeline Integrity engineers;
  • Marine engineers; 
  • Naval architects; 
  • Subsea and offshore engineers; 
  • Project engineers and managers; 
  • Engineers from other sectors of the Oil and Gas industry who wish to gain understanding of 
    subsea pipeline engineering. 

Duration: 3 Days

What will I learn?

This comprehensive “Subsea Pipeline Free Span” course comprises of lectures, case studies and 
workshops providing an overview of free span assessment of rigid subsea pipelines. This course 
provides an insight to fundamental issues for a robust, safe, and economical design of subsea 
pipeline against free spans and also evaluation of free spans observed in in-service pipelines post 
subsea survey. The topics of the course are carefully selected to cover free span engineering aspects 
from conceptual to detailed design. The principal code followed in this course is DNV-RP-F105 “Free 
Spanning Pipelines” supplemented with DNV-RP-C203 “Fatigue Design of Offshore Steel Structures”, 
DNV-RP-C205 “Environmental Conditions and Environmental Loads”, DNV-OS-F101 “Submarine 
Pipeline Systems” and PD 8010-2 “Code of practice for pipelines”.

This training course helps to gain understanding on:
  • Steps involved in engineering and design of free spanning pipeline systems from for both 
    new and existing pipelines; 
  • Key topics related to engineering of free spans; 
  • Physical concept behind free spanning pipelines; 
  • Criteria for robust and safe design of free spanning pipelines.

Course Contents

        Chapter 1 - Wave and Current Modelling
          • Sea-states;
          • Representation and characterisation of sea-states;
          • Short-term modelling of waves;
          • Long-term modelling of waves and currents;
          • Wave setter diagrams;
          • Wave and current histograms;
          • Construction of wave and current 
            histogram from return period values.
        Chapter 2 - Wave and Current Loads
          • Wave theories;
          • Selection of appropriate wave theories;
          • Wave kinematics;
          • Drag and inertia forces.
        Chapter 3 - Introduction to Free Spans
          • Where free spans exist?
          • Free span characterisation;
          • Parameters affecting free span response;
          • Interacting spans.
        Chapter 4 - Free Span Induced Failure Modes
          • Fatigue due to in-line and cross-flow 
            vortex induced vibration (VIV);
          • Fatigue due to direct wave and current cyclic loading;
          • Strength failure (yield) due to pipe self
          • weight and maximum environmental loading.
        Chapter 5 - Free Span Assessment Approaches
          • Screening; 
          • Detailed fatigue assessment based on 
            simplified structural response model;
          • Detailed fatigue assessment 
            incorporating finite element modelling;
          • Extent of applicability and limitations of above approaches.
        Chapter 6 - Safety Factors
          • Pipeline safety class effect on general 
            safety factors;
          • Effect of certainty of free span physical 
            parameters on safety factors;
          • Safety factors for screening criteria.
        Chapter 7 - Structural Response of Free Spanning Pipeline
          • Modelling of pipe-soil interaction 
            (stiffness and damping);
          • Span effective length;
          • Natural frequencies and effect of 
            pressure and temperature;
          • Stress amplitudes;
          • Static bending and deflection.
        Chapter 8 - Screening Level Assessment
          • Required wave and current information;
          • Reduced velocity;
          • Check against in-line vibration;
          • Check against cross-flow vibration;
          • Check against direct wave and current cyclic loading
          • Limitations of screening level assessment.
        Chapter 9 - S-N Curves
          • What is S-N curve?
          • Palmgren-Miner Law;
          • Classification of the welds in the pipeline;
          • Stress Concentration Factor (SCF);
          • Internal and external fatigue;
          • S-N curves based on DNV-RP-C201;
          • S-N curves based on BS 7910.
        Chapter 10 - In-Line VIV
          • Important In-Line parameters;
          • In-line response model;
          • In-line VIV amplitude;
          • In-line induced stress range;
          • In-line vibration frequency;
          • In-line damage.
        Chapter 11 - Cross-Flow VIV
          • Important Cross-Flow parameters;
          • Cross-flow response model;
          • Cross-flow VIV amplitude;
          • Cross-flow induced stress range;
          • Cross-flow vibration frequency;
          • Cross-flow damage;
          • Cross-flow induced in-line motion.
        Chapter 12 - Direct wave and current cyclic loading
          • Vibration frequencies;
          • Force model;
          • Fatigue damage.
        Chapter 13 - Marginal Fatigue Capacity and Total Fatigue life 
          • Comparison of in-line VIV damage and 
            force model damage;
          • Calculation of marginal fatigue capacity in 
            each sea-state due to in-line VIV and 
            cross-flow induced motion and integration 
            over long-term current distribution;
          • Calculation of marginal fatigue capacity in 
            each sea-state due to cross-flow VIV and 
            integration over long-term current distribution;
          • Calculation of marginal fatigue capacity in 
            each sea-state due to direct wave and 
            current cyclic loading;
          • Integration of fatigue damage over all sea states. 
        Chapter 14 - Ultimate Limit State (ULS) Check
          • Calculation of maximum in-line and cross flow loading; 
          • Local buckling code check against DNVOS-F101;
          • Code check against PD 8010-2.
        Chapter 15 - Multi-Mode Response and Finite Element Assessment
          • FE Modelling;
          • Extraction of mode shapes and natural frequencies;
          • Calculate fatigue damage at each point alongside the pipeline;
          • Extract maximum damage.
        Chapter 16 - Free Span Assessment of In
          • Service Pipelines
          • Survey information;
          • Splitting the pipeline in several sections;
          • Free span assessment;
          • Intervention.

        This course is eligible for Continuing Professional Development (CPD) credit hours.

        CPD: 24 Credit

        Price: CA$ 2,300.00