New Pipeline – Design

• Integrated approach to strain-based design and assessment (SBDA)
  1. Design
  2. Material specification/qualification
  3. Tensile strain models
  4. Compressive strain models
  5. Field welding and NDT
  6. Post-construction quality verification
  7. Post-construction monitoring
  8. Strain threshold for maintenance
  9. Interacting defects
• Limit state functions and design
  1. Review limit state functions related to high-strength steels and/or in the presence of high longitudinal strains
  2. Develop new limit state functions for (a) corrosion, (b) mechanical damage
• Pipeline integrity in areas of mine subsidence
  1. Determination of strain demand by conducting pipe/soil interaction modeling
  2. Assessment of pipeline integrity by comparing strain demand with strain capacity
• Tensile strain models
  1. Tensile strain models incorporating key influencing factors for modern and vintage pipelines
  2. Toughness input with various options
  3. Evaluation/validation of models
  4. Software
• Strain capacity of spiral pipes
  1. Comparing strain capacity of spiral pipes with straight-seam pipes
  2. Development of design and assessment methodology
• Stress analysis and code compliance of station piping
  1. Stress analysis for code compliance and integrity assurance

Example Projects – SBDA of Pipeline in Area of Mine Subsidence

Representative Publications

• Tensile Strain Models and Their Applications
• Strain-Based Design and Assessment – Concepts and Gaps
• Strain Demand in Areas of Mine Subsidence
• Integrity of Pipeline In Area Of Mine Subsidence