Intelligent Pigging - in Line Pipe Inspection

Standard
Recommended Practice Operation Process

In-Line Inspection of Pipelines

prepared for

ChevronTexaco

April, 2005

ILI INDEX

PHASE I
1.- TOOL SELECTION
1.1 Appropriateness of the Inspection Tool
1.2 Operational Issues
1.3 Tool Environment
1.4 Pipeline Features
1.5 Product, Product Flow, and Speed Requirements
1.6 Surveys
1.7 Pipeline Cleanliness
1.8 Information Gathering

PHASE II
2.- LOGISTICAL GUIDELINES
2.1 Primary Contracting Considerations
2.2 Definition of scope of work
2.3 Liability issues
2.4 Post-Run Operational Report
2.5 Data Specifications
2.6 Reporting Schedule
2.7 Verification Requirements

PHASE III
3.- INSPECTION SCHEDULING
3.1 Factors that should be considered when scheduling the inspection include the following:
3.2 Resourcing (Manpower and Equipment)
3.3 Benchmarking and Tracking
3.4 Contingency Planning

PHASE IV
4.- NEW CONSTRUCTION—PLANNING FOR ILI SURVEYS
4.1 Planning for ILI surveys should begin with system design.
4.2 Materials
4.3 Collection of Construction Information
4.4 Baseline Surveys
4.5 Repair Records

PHASE V
5.- DATA ANALYSIS REQUIREMENTS
5.1 Data Analysis Methodologies
5.2 Pipeline Features Listed and Reported
5.3 Geometry Tool—Specific Analysis and Prioritization Methods
5.4 Metal Loss (Corrosion)—Tool-Specific Analysis and Prioritization Methods
5.5. Crack-Detection Technology—Tool-Specific Analysis and Prioritization Methods
5.6 Inertial Tools/Mapping Technology—Tool-Specific Analysis and Prioritization Methods
5.7 Correlation of ILI Reported Results with Field Measurements

PHASE VI
6.- DATA MANAGEMENT
6.1 The inspection data should be incorporated into an overall integrity plan.
6.2 Operational and implementation information for successful and unsuccessful inspection can be of significant benefit for re-inspections.
6.3 Use of Growth Rates for Corrosion Inspections GENERAL

This standard is applicable to