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Subsea Engineering and training experts

Since 1988

Jee Star Logo Engineering of flexibles

Engineering of flexibles

About the course

Providing specialist knowledge of flexible risers and flowlines, this course will give design engineers a deeper appreciation of installation and operational conditions, enabling them to design pragmatically. Those operating or installing flexibles will gain an appreciation of associated issues and design limitations, whilst manufacturers will benefit from a greater understanding of how their products are used. 

Covering riser geometry from seabed to surface, the tutor will teach you the skills required to write accurate specifications for flexibles and develop your understanding of how the different wire profiles affect performance. Related equipment and how the effects of installation and operational loads will also be discussed. 

We have gained permission from Orcina to facilitate the use of OrcaFlex, its industry recognised static and dynamic analysis software, during this course. You will have the opportunity to get hands-on with the software and practice simulations and analysis, reinforcing knowledge learned.

Learning outcomes

  • Distinguish and select appropriate materials and equipment
  • Evaluate how FPSO and SPM design affects the choice of riser system
  • Apply theories and lessons learned to projects
  • Compare the different types of software available

View course contents
course bar chart Level Advanced
timer icon Duration 4 Days
clock Study Hours 28
Also available in house

About the Tutor

Alan Knowles

Alan has over 30 years’ experience in industry and has particular expertise in the installation and design of onshore and offshore pipelines, flowlines and landfalls and is an expert in finite element analysis.

He teaches the Design, Construction and Installation calculations for subsea pipelines, Landfalls and marine terminals, Engineering of flexibles, Advanced design including HP/HT and the Risers, umbilicals and flexibles courses.


Jee Star Logo Engineering of flexibles - course contents

Day 1

Flexibles introduction

  • Flexible risers
  • Application of flexibles

Materials selection

  • Polymers
  • Insulation
  • Metals
  • Composites
  • Material specification


  • Code requirements
  • Carcass and pressure armour design
  • Tensile armour

Design of ancillary equipment

  • Bend stiffeners
  • Bend restrictors
  • Bell-mouths
  • Mid-water arches
  • Buoyancy modules

Day 2

Manufacturing and testing

  • Manufacture
  • Testing

Oceanography and hydrodynamics

  • General overview
  • Waves
  • Currents
  • Hydrodynamics


  • Vessel configuration and motion
  • FPSO moorings
  • Swivel stack
  • RAOs

Day 3

Flexible analysis

  • Static analysis
  • Installation analysis
  • Extreme analysis
  • Fatigue analysis

Flexible analysis software

  • Introduction
  • Software available
  • Orcaflex walkthrough
  • Orcaflex do’s and don’ts
  • Orcaflex exercise

Case study

  • Background
  • Theory
  • Analysis
  • Conclusions

Installation of flexibles

  • Storage and handling
  • Flexible flowline installation
  • J-tube installation
  • Riser installation

Day 4

Post-lay trenching and burial

  • Soils and seabeds
  • Trenching considerations and specs
  • Trench transitions
  • Trenching analysis
  • Backfilling

Integrity of flexibles

  • Inspection techniques
  • Monitoring and testing methods
  • Design and installation incidents
  • Operational deterioration and damage

  Very well organised and prepared. It surely is one of the best subsea engineering training courses  

Koo Kim , Korea Offshore & Shipbuilding Association (KOSHIPA)

  Excellent course, very well presented and the tutor is very knowledgeable. The course content covers all the relevant areas of flexibles  

Oluyemi Akinwale, Risers & OOL Systems Leader, Total E&P

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