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OPS Observations, Expectations, and Concerns

OPS Observations, Expectations, and Concerns. Zach Barrett (OPS) Direct Assessment Workshop November 4, 2003. Observations. Not Always Practical To Inline Inspect Small Diameter Lines Telescoping Lines (Storage Fields) Short Radius Bends Crossover Lines Adverse Flow Conditions.

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OPS Observations, Expectations, and Concerns

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  1. OPS Observations, Expectations, and Concerns Zach Barrett (OPS) Direct Assessment Workshop November 4, 2003

  2. Observations • Not Always Practical To Inline Inspect • Small Diameter Lines • Telescoping Lines (Storage Fields) • Short Radius Bends • Crossover Lines • Adverse Flow Conditions

  3. Observations • Not Always Practical To Pressure Test • Supply Concerns • Water Availability and Disposal • Internal Corrosion Concerns • No Quantification of Future Corrosion Risk

  4. The Landscape is Changing • Individual Cathodic Protection and Coating Surveys • Long History of Operator Use • Evolving into “Direct Assessment” • Formalized Process • Integration of Data

  5. The Landscape is Changing • Pipeline Safety Improvement Act of 2002 • Includes Provisions for Direct Assessment • Pending Gas Integrity Management Rule • Includes Direct Assessment

  6. The Landscape is Changing • NACE Developing DA Recommended Practices • RP0502-2002 External Corrosion Final • Internal Corrosion Dry/Wet Gas • Stress Corrosion Cracking

  7. OPS Concerns • Validation of Direct Assessment Methodology • Are Standards Appropriate • Will Direct Assessment Identify Threats to Pipeline Integrity • Repeatability of Process and Results

  8. OPS Concerns • Validation of Direct Assessment Methodology • Establishment Excavation Criteria • Reassessment Interval Justification

  9. OPS Concerns • Indirect Assessment Tool Limitations not well Defined (Probability of Detection) • Important for Tool Selection • Critical for Setting Reassessment Interval • Needs Field Validation

  10. OPS Expectations • Validation through Direct Assessment Workgroup Demonstrations • Standard Applicability • Strengths and Limitations of the Methodology • Improvements to Pipeline Integrity Resulting from Direct Assessment

  11. OPS Concerns • Consistency in Application of Assessments • Critical for Repeatability of Results • Successful Monitoring of Non-excavated Indications

  12. OPS Expectations • Development of Detailed Process and Documentation for: • Direct Assessment Approach • Staff & Contractor Qualifications • Bases for Key Decisions & Criteria • Employee & Contractor Roles

  13. OPS Concerns • Data Availability • DA Requires Complete and Reliable Data • Data Must Be Acquired Where Lacking • May Result in Additional Direct Examinations

  14. OPS Concerns • Existence of Mature Data Management Processes • Acquire, Store, Retrieve • Data Quality - Verification • Crucial to Effective Data Integration/Analysis

  15. OPS Expectations • Development of Effective Data Management System • Processes and Procedures Key • Data Collection, Storage, Retrieval • Data Integration • Data Quality/Control

  16. OPS Concerns • Proper NDT Methods for Direct Assessment • Important for Effective Data Integration/Analysis • Crucial for Identifying Proper Preventive or Mitigative Actions • Key to Effective Reassessment Interval

  17. OPS Expectations • Development of Effective DA Process and Procedures • Identifies Integrity Threat • Conservative in Consideration of Full Range of Integrity Threats • Provides Quality Data for Future Analysis

  18. OPS Concerns • Timeliness of Standard Development • Key to Ensuring Quality and Consistency • Developing for: • ICDA – Wet/Dry Still Under Development • SCCDA – Still Under Development

  19. OPS Expectations • Standard Development • Should Follow ECDA Path for Evaluation/Validation • Update Standards as Experience Demands • Provide Detailed Guidance Where Appropriate

  20. Successful Programs • Establish Detailed Procedures for All Activities • Data Collection/Management • Feasibility Determinations • Definition of Regions • Indirect Inspection

  21. Successful Programs • Establish Detailed Procedures for All Activities • Data Integration & Risk Analysis • Direct Examination • Post-Assessment

  22. Successful Programs • Procedures Address • Responsibilities • Task Identification • How & When Task is Accomplished • Communication of Task Results • Records & Documentation

  23. Successful Programs • Demonstrate Effectiveness • Aggressive Excavation Criteria • Data Integration • Comparisons with Excavation Findings • Re-assessment Results

  24. Successful Programs • Documentation • Identifies and Provides Justification for Assumptions • Evidences Compliance with Gas IM Rule • Provides Detailed Explanation When Standards not Followed • Details are Important

  25. Path Forward • Continued Participation in DA Demonstration Projects • Continued Support for Standards Development • Improve from Lessons Learned

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