Brian Albert

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Brian Albert

• El Paso Pipeline GroupEl Paso Process for ILI
  Data Review

the place to workthe neighbor to havethe
company to own
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El Paso Pipeline Group Natural Gas Infrastructure
Great Lakes GasTransmission (50)2,100 miles 3
Bcf/d
Wyoming Interstate600 miles 2 Bcf/d
ColoradoInterstate Gas4,000 miles 3 Bcf/d
Cheyenne Plains Pipeline380 miles 0.6 Bcf/d
El PasoNatural Gas11,000 miles 6 Bcf/d
ANR Pipeline10,500 miles7 Bcf/d
Tennessee GasPipeline14,200 miles 7 Bcf/d
MojavePipeline400 miles0.4 Bcf/d
Elba Island LNG4 Bcf
Mexico Ventures 106 miles 2 Bcf/d
Florida GasTransmission (50)4,800 miles 2
Bcf/d
SouthernNatural Gas8,000 miles 3 Bcf/d
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In-Line Inspection Results 2001 - 2005

• ILI Summary
• 403 Segments completed
• 14,907 miles inspected, 10,573 1st time miles
• 6200 anomalies remediated (20012005 ILI)
• 2006 ILI 92 segments, 3992 miles
• 1st time ILI 54 segments, 2270 miles
• ILI Vendor providing in-house support

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ILI Process

• Cleaning/Gauging pigs to confirm piggability
• Multi-channel caliper or deformation tools
• High resolution MFL
• Combination caliper/MFL tool
• Post run confirmation of good data Approved by
  El Paso
• Vendor reports received within 60 days
• ASME B31G modified, 1 clustering

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ILI Review Process

• Typically notified by e-mail of estimated
  delivery date
• Some inspection segments are critical resulting
  in a more highly anticipated report receipt.
  This can be due to line availability, customer
  concerns, seasonal considerations, line history,
  previous ILI results and/or expected findings

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ILI Review Process

• Initial Response Memo (Immediate / 1-Year
  Condition Indications)
• Purpose is to provide an accounting of actionable
  anomalies that meet Immediate and 1-Year
  condition criteria per EP Policy
• Final Response Memo (Scheduled Condition
  Indications)
• Purpose is to provide an accounting of actionable
  anomalies that meet Scheduled condition criteria
  per EP Policy

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ILI Response Memo Initial

• Target completion within 5 business days of
  receipt
• Identify HCAs
• Immediate Anomalies
• FPR lt 1.1 MAOP
• Dent w/ metal loss in HCA
• Other significant anomaly (gt 80 depth, GMA)
• GMA Geometric Magnetic Anomaly

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ILI Response Memo Initial

• 1-Year Condition Anomaly
• Dent gt 6 in HCA and upper 2/3 of pipe
• Dent gt 2 in HCA and associated with girth weld
  or long seam
• Discovery of Condition Date
• Pressure Restriction, if required
• Brief discussion of results with respect to
  Immediate and 1-Year indications

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ILI Data Review - Initial

• Verify basic pipe data (OD, wt, SMYS, MAOP, seam
  type)
• First look is at the tabular data
• Sort by Pfail. Identify anomalies PFR lt 1.1
• Sort by depth. Identify anomalies gt80 depth
• Review all dents. Pay particular attention to
  dents over 6, dents w/ metal loss and those
  associated with welds

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ILI Data Review - HCAs

• HCA must be identified and limits noted on vendor
  data
• Pull current HCA data for ILI segment
• Merge HCA data into vendor pipe listing
• Identify appropriate reference for HCA (Valve,
  tap, tee or AGM)
• Calculate wheel count of HCA limits
• Review data within HCA limits (and buffer) in
  more detail

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ILI Data Review Additional Considerations

• Leak/Failure history of inspection segment
• Seam type (pre-1970 ERW)
• Class location/HCA
• Proximity to highways, roads, railroads, parks,
  schools, etc.
• Almost Immediate anomalies (ie. 78, PFR just
  above 1.10, etc.)

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PHMSA Lessons Learned Initial Response

• During recent PHMSA audit, it was requested that
  El Paso provide documentation on a number of
  items relating to the Initial Response including
• Transmittal letter indicating when report was
  received from the vendor
• Documentation of reference pressure used to
  calculate pressure restriction
• Documentation indicating the date and time when
  pressure restriction was enacted

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ILI Data Review - Detailed

• A comprehensive review and analysis is conducted
  prior to distribution of the Final Response Memo
  summarizing the ILI segment and the resulting
  inspections
• Target completion of this review and memo is
  30-60 days. In many segments which are more
  complicated, 60-90 days is more realistic a
  timeline

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ILI Data Review Detailed

• Review Feature List
• Sort by depth
• Sort by PFR (Pressure Failure Ratio)
• Review all dents not meeting Immediate or 1-Year
  criteria
• Other indications including
• Anomalies associated with girth weld, long seam
• Anomalies associated with wrinkle bends
• Metal Loss in casings
• Area of internal indications
• GMAs with metal loss
• GMAs associated with girth weld, long seam

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ILI Data Review Detailed

• Additional passes through data to focus on
  specific items may be beneficial
• Casings
• Wrinkle Bends
• Internal Defects
• All HCAs

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ILI Data Review Detailed

• Review graphical representation of data
• Look at flagged indications
• Discuss findings with Division Engineers
• Division Engineers apply local knowledge, line
  history, Area Operations input, prior inspection
  results, etc. to assist in categorization
  (Scheduled, Further Assessment, Do Not Inspect,
  etc)

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ILI Data Review Detailed

• Correlate encroachment data with log data
• Run a query on El Paso ISAT database to pull
  encroachments within HCAs.
• Encroachments within HCA in ILI segment are
  merged using same process as that determining HCA
  limits (Using same reference as used for HCA)
• Re-sort data by wheel count to place in proper
  order

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ILI Data Review Final Response

• Final Response Memo is drafted detailing the
  Scheduled Inspections by station and wheel count
• Discussion of vendor findings and review of data
  is included. This would include recommendations
  for additional measures such as leak tests,
  casing inspections and other areas of concern
  that dont specifically meet the Scheduled
  Inspection criteria
• Report distribution is same as previous memo and
  includes a copy of the Pipe Listing

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Recordkeeping

• Electronic copies of the vendors report, Initial
  and Final memos and the Feature List are kept on
  a shared drive
• ILI spreadsheet detailing all the current years
  segments and current status is kept. This
  spreadsheet is used to track some data needed for
  OPS and INGAA reporting
• Vendor reports are typically received in CD or
  DVD format with paper reports kept to a minimum

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Future Developments

• Develop Unity Plot of Predicted vs. Actual data,
  then compare by
• Vendor
• Diameter
• Tool type (conventional, high-res, combo)
• Internal, External, Deformation

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• Thank You!