External Corrosion Direct Assessment Procedure – RSTRENG

Section 1 | Focused on Understanding and Recognizing Pipe Defects to Meet Industry’s Zero Leak Mandate

• Why Do Pipelines Fail?
  • Flawless Pipe
• Locate & Define Coating Holidays and Pipe Defects
  • In Line Inspection (ILI)
  • Pressure Test (Hydro)
  • Direct Assessment (DA)
  • Other Technology
• Excavations/Direct Examination
  • Reported Critical Features
  • Tool Performance
  • Direct Examination Step
• Site Analysis and Documentation
• Corrosion Mapping Tools
  • Non-Destructive testing (NDT)
  • Pit Gauges (Manual)
  • Pit Gage Measurements
  • 3D Structured Light Toolbox
  • Guided Wave Testing (GWT)
  • Magnetic Particle Inspection (MPI)
  • Dye Penetrant Inspection (DPI)
• Identify & Classify Indications
  • Report Critical Features from ILI
  • ILI Tool Performance
• Prioritization of Indications
  • ILI Effectiveness
• Data Requirements and Report Results
• Mitigation and Repair

Section 2 | Definitions

Section 3 | Technologies Used for Assessing Pipeline Defect

• Types of Corrosion Measurements
  • Common Field Type Mechanical Pit Gauges
  • 3D Tools to Assess Defects
• ASME/API 579 FFS-1 (Level 1, 2 and 3)
• Pit Gauges
• Industry Desires
  • Significant opportunities for improvement using 3D Structured Light
• 3D Analysis Approach
• Examples of 3D Structure Light Measurements
  • 3D Toolbox
  • System Components
  • 3D Structured Light Toolbox

Section 4 | Evaluation of the Remaining Strength of Corroded Pipe

• B31.G, Modified B31.G and RSTRENG Background
  • Barlow’s Formula
  • MAOP (Maximum Allowable Operating Pressure)
  • B31.G Criterion & Modified B31.G
  • Basic Equation for Hoop Failure Stress
• References in DOT 192.483c, 192.933, 195.585 & 195.587
  • 485c Remedial measures: Transmission Lines
  • 933 What actions must be taken to address integrity issues?
  • 587 – What methods are available to determine the strength of corroded pipe?
• Finding and Measuring the Corrosion
  • ILI Boxing or Clustering
  • Manual Gridding and Clustering
  • River Bottom Profile
• Assessing Corrosion
  • Level 1
  • Level 2 – Effective Area Method
• Interaction Rules
  • ASME B31.8
• Limitations
• Calculations with RSTRENG Program
  • Updating Existing Project Files
  • Opening New Project Files
• Using 3D Structured Light with RSTRENG
  • Accurate 3D measurements
  • Pipeline Analysis in Figure
• Mitigation/Repair
  • Repairs
  • Mitigation
• Documentation (Complete)
• Additional Training

Section 5 | References

• NACE Standard RPO102 (latest revision), “In-Line Inspection of Pipelines” Houston, TX
• NACE Standard RP0313 (latest revision), “Guided Wave Applications for Pipelines”, Houston, TX
• NACE Standard RP0502 (latest revision), “Pipeline External Corrosion Direct Assessment Methodology”, Houston, TX
• ASME B31.8 (latest revision), Gas Transmission and Distribution Piping, New York, New York
• ASME B31.8S (latest revision), Gas Transmission and Distribution Piping, New York, New York
• ASME B31.G (latest revision), ASME B31G – Manual for Determining the Remaining Strength of Corroded Pipelines (RSTRENG), New York, New York

Other Related Links

Pipeline HUB — User Resources
PRCI RSTRENG — User Guide
RSTRENG+ Demo Video

Table of Contents

Table of Pages

Table of Contents

1. Pipeline HUB User Resources
2. AC Mitigation PowerTool
3. API Inspector's Toolbox
4. Horizontal Directional Drilling PowerTool
5. Crossings Workflow
6. Hydrotest PowerTool
7. Pipeline Toolbox
8. Encroachment Manager
9. PRCI AC Mitigation Toolbox
10. PRCI RSTRENG
11. RSTRENG+
12. Ad-hoc Analysis
13. Database Import
14. Data Availability Dashboard
15. ESRI Map
16. Report Builder
17. Crossings Workflow
18. Hydrotest PowerTool
19. Investigative Dig PowerTool
20. Hydraulics PowerTool
21. External Corrosion Direct Assessment Procedure - RSTRENG
22. Canvas
23. Definitions
24. Pipe Schedule and Specifications Tables