ops observations, expectations, and concerns zach barrett (ops) direct assessment workshop november...
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Observations Not Always Practical To Pressure Test Supply Concerns Water Availability and Disposal Internal Corrosion Concerns No Quantification of Future Corrosion RiskTRANSCRIPT
OPS Observations, Expectations, and Concerns
Zach Barrett (OPS)Zach Barrett (OPS)Direct Assessment Workshop Direct Assessment Workshop
November 4, 2003November 4, 2003
Observations Not Always Practical To Inline Inspect
Small Diameter Lines Telescoping Lines (Storage Fields) Short Radius Bends Crossover Lines Adverse Flow Conditions
Observations Not Always Practical To Pressure Test
Supply Concerns Water Availability and Disposal Internal Corrosion Concerns No Quantification of Future Corrosion Risk
The Landscape is Changing Individual Cathodic Protection and
Coating Surveys Long History of Operator Use
Evolving into “Direct Assessment” Formalized Process Integration of Data
The Landscape is Changing Pipeline Safety Improvement Act of
2002 Includes Provisions for Direct Assessment
Pending Gas Integrity Management Rule Includes Direct Assessment
The Landscape is Changing NACE Developing DA Recommended
Practices RP0502-2002 External Corrosion Final Internal Corrosion Dry/Wet Gas Stress Corrosion Cracking
OPS Concerns Validation of Direct Assessment
Methodology Are Standards Appropriate Will Direct Assessment Identify Threats to
Pipeline Integrity Repeatability of Process and Results
OPS Concerns Validation of Direct Assessment
Methodology Establishment Excavation Criteria Reassessment Interval Justification
OPS Concerns Indirect Assessment Tool Limitations
not well Defined (Probability of Detection) Important for Tool Selection Critical for Setting Reassessment Interval Needs Field Validation
OPS Expectations Validation through Direct Assessment Validation through Direct Assessment
Workgroup DemonstrationsWorkgroup Demonstrations Standard ApplicabilityStandard Applicability Strengths and Limitations of the Strengths and Limitations of the
MethodologyMethodology Improvements to Pipeline Integrity Improvements to Pipeline Integrity
Resulting from Direct AssessmentResulting from Direct Assessment
OPS Concerns Consistency in Application of
Assessments Critical for Repeatability of Results Successful Monitoring of Non-excavated
Indications
OPS Expectations
Development of Detailed Process and Development of Detailed Process and Documentation for:Documentation for: Direct Assessment ApproachDirect Assessment Approach Staff & Contractor QualificationsStaff & Contractor Qualifications Bases for Key Decisions & CriteriaBases for Key Decisions & Criteria Employee & Contractor RolesEmployee & Contractor Roles
OPS Concerns Data Availability
DA Requires Complete and Reliable Data Data Must Be Acquired Where Lacking May Result in Additional Direct
Examinations
OPS Concerns Existence of Mature Data Management
Processes Acquire, Store, Retrieve Data Quality - Verification Crucial to Effective Data
Integration/Analysis
OPS Expectations Development of Effective Data
Management System Processes and Procedures Key Data Collection, Storage, Retrieval Data Integration Data Quality/Control
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
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
OPS Concerns Timeliness of Standard Development
Key to Ensuring Quality and Consistency Developing for:
ICDA – Wet/Dry Still Under DevelopmentSCCDA – Still Under Development
OPS Expectations Standard Development
Should Follow ECDA Path for Evaluation/Validation
Update Standards as Experience Demands Provide Detailed Guidance Where
Appropriate
Successful Programs Establish Detailed Procedures for All Establish Detailed Procedures for All
Activities Activities Data Collection/ManagementData Collection/Management Feasibility DeterminationsFeasibility Determinations Definition of RegionsDefinition of Regions Indirect InspectionIndirect Inspection
Successful Programs Establish Detailed Procedures for All Establish Detailed Procedures for All
Activities Activities Data Integration & Risk AnalysisData Integration & Risk Analysis Direct ExaminationDirect Examination Post-AssessmentPost-Assessment
Successful Programs Procedures AddressProcedures Address
ResponsibilitiesResponsibilities Task IdentificationTask Identification How & When Task is AccomplishedHow & When Task is Accomplished Communication of Task ResultsCommunication of Task Results Records & DocumentationRecords & Documentation
Successful Programs
Demonstrate Effectiveness Aggressive Excavation Criteria Data Integration Comparisons with Excavation Findings Re-assessment Results
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
Path Forward Continued Participation in DA
Demonstration Projects Continued Support for Standards
Development Improve from Lessons Learned