Kurt Lawson is Vice President of CC Technologies Systems, Inc., a corrosion engineering and research firm specializing in corrosion, corrosion control methods, research, failure analysis, and cathodic protection monitoring, design and construction. He has more than 17 years of field experience in the corrosion testing and evaluation of buried structures, including reinforced soil structures, pilings, reinforced concrete structures, and cathodically protected tanks and pipelines. Work on these structures has covered a wide range of techniques including basic potential surveys, application of advanced AC and DC electrochemical methods, advanced potential surveys utilizing digital storage oscilloscopes, and complex finite element computer modeling of cathodic protection systems and their effectiveness.
DAY 1
General
• Regulatory Issues
• NACE Standard
• INGAA
• ASME B31.8S
External Corrosion Direct Assessment (ECDA)
NACE Standard RP0502-2002
Four Steps Definitions (Pre-Assessment, Indirect Examinations, Direct Examination, Post Assessment)
Pre-Assessment
• Data Collection
• ECDA Feasibility for pipelines
• Indirect Inspection Tool selection
• ECDA Region identification
Indirect Examination
• Selection of Indirect Selection Tools
• Data alignment and comparison
• Indication Classification
Direct Examination
• Prioritization
• Excavations and Data Collection
• Coating damage and corrosion depth measurements
• Measurements
• Remaining strength evaluation
• Root cause analysis
• Mitigation
• In-Process evaluation
• Reclassification and Reprioritization
• Guidelines for determining the required number of Direct Examinations
DAY 2
Post Assessment
• Remaining Life Calculations
• Reassessment Intervals
• Assessment of ECDA Effectiveness
• Feedback and Improvements
Records
Indirect Inspection Methods
• Close Interval Surveys CIS
• AC Current Attenuation
• DCVG and ACVG Surveys
• Pearson Surveys
• Cell to cell Surveys
Example of ECDA Application
Internal Corrosion Direct Assessment (ICDA)
NACE Standard prepared by TG 293
Four Steps Definitions (Pre-Assessment, Indirect Examinations, Direct Examination, Post Assessment)
Pre-Assessment
• Data Collection
• ICDA Feasibility for pipelines
• ECDA Region identification
Indirect Examination
• Steady State Flow Modeling Calculations
• Inclination Profile Calculations
Direct Examination
• Site Selection
• Site Selection for Constant Flow Rate Pipelines
• Site Selection for Varied low Rate Pipelines
• Excavation and Inspection
Post Assessment
• Assessment of ICDA Effectiveness
• Reassessment Intervals
Records
Example of ICDA Application
Stress Corrosion Direct Assessment (SCCDA)
NACE Standard prepared by TG 273
General – Overview of SCC types and Characteristics
Four Steps Definitions (Pre-Assessment, Indirect Examinations, Direct Examination, Post Assessment)
Pre-Assessment
• Data Collection
• Prioritization of pipeline segments
Indirect Examination
• Site selection
• Field verification of selected sites
Direct Examination
• Excavation and examination
Post Assessment
• Evaluation and documentation
• Reassessment Intervals
Records
Example of SCCDA Application
