Gas gap analysis process a starting point for dimp
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Gas GAP Analysis Process - A starting point for DIMP. Adam Marxen Manager Gas Engineering and Operations Support. Alliant-Energy Utilities. Over 1,000 Community’s in Iowa, Wisconsin, and Minnesota. Customers : Gas - 410,000 Electric - 980,000 Facilities Gas

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Gas GAP Analysis Process - A starting point for DIMP

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Gas GAP Analysis Process - A starting point for DIMP

Adam Marxen

Manager Gas Engineering and Operations Support


Alliant-Energy Utilities

  • Over 1,000 Community’s in Iowa, Wisconsin, and Minnesota.

  • Customers:

    • Gas - 410,000

    • Electric - 980,000

  • Facilities

    • Gas

      • 8,300 miles distribution (4,500 in IPL)

      • 850 miles transmission (800 in IPL)

    • Electric

      • 43,000 miles of distribution

      • 10,000 miles of transmission


Outline

  • Introduction to the Alliant Planning and GAP Process

  • GAP Data Collection/Interpretation

  • Migration to DIMP

  • Questions


Alliant Energy Business Systems“Know your systems” “Know your threats”

  • GIS

    • Established 1998

    • ESRI’s ArcGIS with Telvent’s ArcFM

    • Integrated all gas facility records in GIS/facilities database

    • Linked facility records with inspection, leaks, and maintenance records

  • GIMMS – Gas Inspection & Maintenance Management System

    • Services, Valves, CP, Reg Stations, Steel Pipe Inspections, Odorization use and sniff tests, and maintenance tracking.

    • All inspections, leaks, and maintenance linked to GIS records

    • Initiated in 1988 & tied to GIS in 1998


Alliant Planning and GAP Process“Risk Evaluation and Ranking”

  • GAP Planning Process

    • Identify and set priorities for gas projects that create the most value and minimize risk for the company.

    • Uses system performance metrics based on service reliability and safety

  • What is a GAP?

    • A GAP exists when the measured performance indicates a higher risk related to reliability or safety.


What is the GAP Calculation based on?

  • Ranking criteria:

    • Peak Low Pressure

    • Leaks

    • Corrosion

    • Reliability

    • Visual Inspection

    • Age


Regulation Station GAP Process

  • Assess each station to identify and score risks in:

    • Safety – location, traffic, barriers, leaks, corrosion

    • Operations – valves, preheaters, odorizers, station capacity, obsolete equipment, others

    • Code violations


GAP Scoring Summary

  • Score each Gas System Element on each criteria based on weakest area.

  • System Elements typically based on unique pressure zone or regulation station.

  • Sort elements based on GAP score.

  • Analyze root cause for GAP and propose measures to eliminate or reduce GAP

  • Proposed solutions drive budgets and project lists


GAP Spreadsheet Example


GAP Spreadsheet Example (cont.)


GAP Spreadsheet Example (cont.)


GAP Data Collection

  • Gas Pressure (Charts, SCADA, and SynerGEE)

  • Reliability (GIS)

  • Gas Leaks (GIMMS)

  • Visual Inspection Data (GIMMS)

  • Pipe to Soil Cathodic Protection Readings (GIMMS, GIS)

  • Age (GIS)

  • Meetings with each Op Zone

    • Manager

    • Lead Engineering Tech

    • Chief Gas Tech


GAP Data Collection

  • Gas Pressure (Charts, SCADA, and SynerGEE)

  • Reliability (GIS)

  • Growth Capacity (SynerGEE)

  • Gas Leaks (GIMMS)

  • Visual Inspection Data (GIMMS)

  • Pipe to Soil Cathodic Protection Readings (GIMMS, GIS)

  • Age (GIS)

  • Meetings with each Op Zone

    • Manager

    • Lead Engineering Tech

    • Chief Gas Tech


GAP Data Collection

  • Gas Pressure (Charts, SCADA, and SynerGEE)

  • Reliability (GIS)

  • Growth Capacity (SynerGEE)

  • Gas Leaks (GIMMS)

  • Visual Inspection Data (GIMMS)

  • Pipe to Soil Cathodic Protection Readings (GIMMS, GIS)

  • Age (GIS)

  • Meetings with each Op Zone

    • Manager

    • Lead Engineering Tech

    • Chief Gas Tech


GAP Data Collection

  • Gas Pressure (Charts, SCADA, and SynerGEE)

  • Reliability (GIS)

  • Growth Capacity (SynerGEE)

  • Gas Leaks (GIMMS)

  • Visual Inspection Data (GIMMS)

  • Pipe-to-Soil Cathodic Protection Readings (GIMMS, GIS)

  • Age (GIS)

  • Meetings with each Op Zone

    • Manager

    • Lead Engineering Tech

    • Chief Gas Tech


GAP Data Collection

  • Gas Pressure (Charts, SCADA, and SynerGEE)

  • Reliability (GIS)

  • Growth Capacity (SynerGEE)

  • Gas Leaks (GIMMS)

  • Visual Inspection Data (GIMMS)

  • Pipe to Soil Cathodic Protection Readings (GIMMS, GIS)

  • Age (GIS)

  • Meetings with each Op Zone

    • Manager

    • Lead Engineering Tech

    • Chief Gas Tech


Transition to DIMP - Goals For Improvement

  • Develop written plan.

  • Update to meet additional DIMP risk assessment categories

    • Excavation activity

    • Impact assessment

    • Others

  • Refine model to appropriate “block” level. Gas system too big at times and individual pipe segment too small.

  • Develop scoring system on the “block” level that summarizes all criteria.

  • Develop standard reports

  • Include positive inspections in addition to the negative. The good observations are also informative.

  • Address compression coupling failure reporting.


Questions


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