Defect Assessment in Pipelines course



Many oil and gas pipelines are at, or nearing, the end of their design life. Pipeline infrastructure, however, will need to perform for many more decades, as world demand for oil and gas is predicted to increase up to 2020. Many transmission pipelines are now over 40 years old – “middle aged” in pipeline terms. Even the best designed and maintained pipeline will become defective as it progresses through its design life.Operators, therefore, need to be aware of the effect these defects will have on their pipeline and, more importantly, be able to assess their significance in terms of the continuing integrity of the pipeline. The increasing use of high technology maintenance is helping pipeline owners to assess the condition of their lines. If these modern maintenance methods are combined with modern defect assessment methods, they can provide a very powerful and cost effective tool.


This course will present the latest defect assessment methods to pipeline engineers and managers. These methods will range from simple, quick assessment methods, to the more detailed “fitness for purpose” analysis. It is highly interactive and takes the form of lectures, workshops and case studies. It will cover methods available to assess the significance of defects detected in on-shore pipelines. Introduce simple analytical methods used to assess internal and external corrosion, dents and gouges, cracks, weld defects and fatigue. Include worked examples where attendees will calculate the significance of defects in pipelines and set intelligent pig inspection levels. What’s more, the course will be fully documented with all sides and related documents printed in a durable binder for reference during and after the course, providing an invaluable reference document.


Becoming a certified professional of defect assessment in pipelines helps you to differentiate yourself with demonstrated expertise and at the same time differentiate your company from competitors. This course will help you to obtain also, a holistic approach to defect assessment and to appreciates all aspects of the subject, including the latest defect assessment methods for pipeline engineers and managers. From simple, quick assessment, to the more detailed “fitness for purpose” analysis.


Swiss Approval International guarantees an accredited certification, giving the attenders of the “Defect Assessment in Pipelines Course”, the appropriate passport for the international market, ensuring with accuracy and independence the knowledge about the principles, the skills and the responsibilities that refer to an inspector of defect in pipelines.


At the end of the training program, participants will acquire basic knowledge and skills regarding the following major issues:

  • Provide an overview of the importance of pipeline defect assessment
  • Describe how pipelines fail and how defects are classified and detected
  • Provide the basic principles of defect assessment
  • Obtain holistic approach to defect in transmission pipelines and the knowledge to allow assessment
  • Understand all aspects of the subject, including repair and risk management
  • Cover methods available to assess the significance of defects detected in onshore and offshore pipelines
  • Introduce simple analytical methods used to assess internal and external corrosion, dents and gouses, cracks (for example, SCC), weld defects and fatigue
  • Identify which type of analysis tool is appropriate for common defect types


  • Pipeline engineers
  • Designers
  • Operators
  • Service professionals who are involved
    with the maintenance, design, inspection and repair of oil and gas pipelines

Course Syllabus

Module 1: Introduction to Basic Pipeline Engineering Principles

  • Basic pipeline design principles | Private
  • Stresses in pipelines | Private
  • Basic pipeline operating and maintenance parameters | Private

Module 2: Introduction to Pipeline Defects – Why Pipelines Fail

  • How safe are pipelines? | Private
  • How often do they fail? | Private
  • What causes pipelines to fail? | Private
  • Pipeline risks | Private

Module 3: Introduction to Fracture Mechanics (notes only)

  • Basic theory | Private
  • Brittle & ductile fracture | Private
  • K, J, and CTOD | Private

Module 4: Introduction to Fundamental Pipeline Defect Failure Relationships

  • History of pipeline defect assessment | Private
  • Fundamental failure relationships | Private
  • Explanation of key parameters | Private

Module 5: How to Assess Corrosion Defects

  • Introduction to basic theory | Private
  • Methods to assess corrosion | Private
  • ASME B31G and RSTRENG methods | Private
  • Interacting defects | Private
  • New methods | Private
  • Tutorial – Worked examples on Corrosion Defect Assessment | Private

Module 6: How to Assess Gouges and Dents

  • Introduction to basic theory | Private
  • Methods to assess gouges | Private
  • Methods to assess dents | Private
  • Problems with fatigue loadings | Private
  • Tutorial – Worked example on damage assessment | Private

Module 7: How to Assess Cracks and Weld Defects

  • Basic theory | Private
  • The problems with cracks in pipelines | Private
  • Stress corrosion cracking (low and high pH) | Private
  • Assessing defects in pipeline girth welds | Private
  • Assessing non planar defects in welds | Private
  • The EPRG girth weld defect guidelines | Private
  • What pigs can detect | Private
  • What operators want to detect | Private
  • Setting intelligent pig inspection levels | Private

Module 8: Fracture Propagation and Arrest

  • Why fractures propagate | Private
  • Brittle and ductile propagation | Private
  • Fracture arrest | Private
  • Calculating toughness requirements | Private

Module 9: How to Assess Fatigue (notes only)

  • Why do pipelines fatigue? | Private
  • Basic fatigue theory | Private
  • Fatigue assessment – design | Private

Module 10: Pipeline Repair and Rehabilitation

  • Response to discovering defects | Private
  • What are the cost implications? | Private
  • Grinding | Private
  • Weld deposition | Private
  • Shells (including epoxy filled) | Private
  • Composite wraps | Private
  • Cut outs | Private
  • Mechanical clamps/connectors | Private
  • Repair and rehabilitation strategy | Private

Module 11: Risk and Integrity Management and Analysis

  • Probability and consequences | Private
  • Pipeline and risk management systems | Private
  • Risk analysis (quantitative and qualitative) | Private
  • API 1160 and ASME B31.8S assist with risk | Private
  • Setting inspection and maintenance priorities | Private
  • Prioritisation schemes | Private

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