Problem

Our Client requested In-Line-Inspection (ILI) reports to be reviewed and to “align” ILI vendor data reports to as-built pipeline records in GIS.  For this example, the ILI vendor used “Magnetic Flux Leakage Technology” to detect and characterize internal and external metal loss features.

Integrity EPC’s Data Management and GIS team has been tasked with “aligning” the ILI vendor to client pipeline as-built data in GIS.

Approach and Solution:

Using ESRI ArcGIS spatial environment for geoprocessing and our proprietary analysis tools, we’re able to quickly “align” ILI vendor data to client as-built records in GIS and analyze ILI vendor data to reporting.

Execution

In order for our geoprocessing process to work in GIS, we set or use current above ground monumentation (AGM) and use GPS survey data along with additional above ground appurtenances and as-built records for calibration and analysis.  The alignment analysis can be overlaid and data such as ‘metal loss’ or other anomalies can be plotted along the route of the pipeline.  In addition, we use our proprietary analysis tools to calculate risk, and prepare an accurate dig location and schedule.

Results

Using our GIS alignment analysis and vendor ILI data, we can “align” client data to pipeline as-built records in GIS.  We will be able to map high priority areas and report an accurate location for your digging schedule.  When used in conjunction with our proprietary analysis tools, IEPC can give you an insight to anomaly growth rates, compare projected anomalies to failure criteria, determine when pipe falls below safe working pressure, determine when a pipe approaches leak condition (% wall loss), flag anomalies that should be inspected immediately, applies “half remaining life” or other custom safety factors.  Lastly, we will recommend inspection dates for each anomaly on the line and create an accurate dig location and plan that corresponds with your inspection and construction schedule.