Client: Onshore Liquid Pipeline Operator
Project:
Crack Detection Tool Performance Validation (API 1163)
Overview
We have completed various integrity management scopes for onshore liquid pipeline operators within South America. This case study focuses on reviewing an ultrasonic crack detection ILI tool performance in line with API 1163 for three pipeline segments of a liquid pipeline.
The project goal was to help the operator evaluate tool performance reviewing detection, identification and sizing of any reported planar indications and compare to the vendor’s stated performance specification.
Background
The operator contracted an inspection vendor to complete an in-line inspection along their >500 km liquid pipeline system which comprised of three segments. Following the inspections, the operator executed an extensive field verification campaign.
Location
South America
Project Stats
Number of Pipeline segments
Number of joints excavated
The Approach
We reviewed the performance of the ultrasonic crack detection ILI tool in-line with the guidance outlined in API 1163 (In-Line Inspection Systems Qualification). This standard is performance-based and provides requirements for the qualification processes of an in-line inspection run. The objective was to compare the field data with the ILI vendor’s stated performance specification for the detection, identification and sizing of planar anomalies.
Considering the extensive field data collected by the client, we were able to evaluate the following per pipeline segment:
- Probability of Detection (POD)
- Probability of Identification (POI)
- Probability of Sizing (POS)
In addition, we were also able to review tool performance in discrete portions of each pipeline, where there was a variation in pipe geometry, manufacturer, weld type and wall thickness.
Results
- The results of the work provided the operator with an understanding of tool performance along the entire length of their pipeline system to support their ongoing integrity management program.
