High Consequence Areas

1
High Consequence Areas Pipeline Assessment
Intervals Is there a need for change?

• Terry Boss
• Sr. VP Environment Safety and Operations
• Interstate Natural Gas Association of America

2
Outline

• Natural Gas and Transportation
• Management of Public Risk
• Results of the IMP Program
• Requesting Flexibility in IMP Program Schedule
• Ongoing Initiatives to Improve Performance

3
Natural Gas and Transportation

• Primarily Methane Hydrogen with some Carbon
• Swamp Gas
• Lower Density of Energy Gaseous
• Locations of Supply is Diverse
• Locations of Market is Diverse
• Transportation by Pipelines is Most Feasible
• Bridge Fuel
• Primary Risk is Fire
• Lighter than Air
• Limited Ignition Range
• Heat Radiation based on Quantity

4
Market and Population is Dispersed
5
The Natural Gas Industry
Marketers
Storage
Commercial
Residential
Industrial Utilities

• Producers
• Majors
• Independents

Gathering
Storage
30 Major Interstate Pipelines
272,500 Gas Wells
1200 Distributors
6
Interstate Natural Gas Pipelines
7
More Interstate Natural Gas Pipeline
Informationwww.ingaa.org
8
Managing Public RiskNatural Gas Transmission
Pipeline Safety Development
9
Pipeline Safety - Layers of Protection Example
Regulations
OPS 49 CFR 192/5
Codes
ASME B31.4/8
Standards
NACE RP-0169 RP-0502 API RP-1163
Practices
Close Internal Survey Direct Current Voltage
Gradient Hydrotesting Inline Inspection
Programs
Integrity Management
Mfg
Const
Internal
SCC
Research Development
External Corrosion Threat
10
Natural Gas Transmission Pipeline Risk Management
biased by Population Density

• Design
• Design Classes
• Materials
• Strength of Pipe
• Construction
• Construction Techniques
• Operation
• Operating pressures and Practices
• Inspection
• Frequency and Type of Inspection
• Maintenance

11
Example High Consequence Area
12
Worst Case Consequence Analysis
13
Constant Consequence Concept
Pipeline diameter d (inches) 36 MAOP 1650
psig PIR 1000 ft
Pipeline diameter d (inches) 18 MAOP 600
psig PIR 304 ft
Pipeline diameter d (inches) 30 MAOP 1000
psig PIR 655 ft
r 1009 ft.
20 houses within circle
PIR 0.69 pd2
14
Pictorial of a High Consequence Area for Natural
Gas Overlaid on the Class Location System
30 Pipeline 1010 psig
14
15
Results of the IMP Program (PHMSA)
Carlsbad
Number of Significant Incidents
Number of Fatalities
Number of Injuries
Hurricanes
Property Damage
16
Ongoing Performance Metrics -PHMSA
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INGAA Foundation Report
18
Probability of Failure
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Types Failures

• Static Anomalies
• Detrimental
• Non - Detrimental
• Time Independent Defects
• Excavation Damage
• Weather
• Terrorist
• Time Dependent Defects
• Corrosion
• Cracking

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Manage Time Dependent Defects

• Manage Time Dependent Effects
• Inline Inspection
• Pressure Test
• Direct Assessment
• Other Approved Methods

21
Integrity Assessment Technology Split
22
GAO Report (Sept 2006)
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Timeline For IMP
24
Interaction of Baseline and Continuing Assessments
25
Condition of gas transmission pipelines are
better than original public perception
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GAO concludes that 7 year reassessment period is
conservative
27
Requesting Flexibility in IMP Program Schedule
28
Public Workshop to gather comments on Special
Permit and Criteria Discussion for 7-year
Reassessments Location Arlington, Virginia Jan
18, 2008
29
Congressional Testimony - March 2008
30
Number of Reportable Incidents
31
Number of Immediate Repairs
32
Number of Scheduled Repairs
33
(No Transcript)
34
Ongoing Initiatives to Improve Performance

• Tools
• Processes
• Procedures
• Implementation

35
Cased Pipeline Integrity Assessment Workshop
36
Anomaly Assessment and Repair Workshop - October
22, 2008
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Conclusions

• Natural Gas is a Very Important Energy Source
• Flexible and Readily Available
• Bridge Fuel for Climate Change
• Energy Security
• Public Risk Can and Is Being Managed
• Flexibility in the IMP Program is Very Desirable
• Commitment to Ongoing Improvement

38
Background Material

• COMPARISON OF INTEGRITY MANAGEMENT ASSESSMENT
  TECHNIQUES FOR NATURAL GAS TRANSMISSION PIPELINES
• www.ingaa.org
• F-2007-09
• NATURAL GAS PIPELINE SAFETY Risk-Based Standards
  Should Allow Operators to Better Tailor
  Reassessments to Pipeline Threats
• www.gao.gov
• GAO-06-945
• Integrity Management Plan Metrics
  http//primis.phmsa.dot.gov/gasimp/PerformanceMeas
  ures.htm
• PHMSA Workshops
• Public Workshop to gather comments on Special
  Permit and Criteria Discussion for 7-year
  Reassessments http//www.phmsa.dot.gov/portal/site
  /PHMSA/menuitem.ebdc7a8a7e39f2e55cf2031050248a0c/?
  vgnextoid4aeb8defc8de6110VgnVCM1000001ecb7898RCRD
  vgnextchannel5296519d7e818110VgnVCM1000009ed0789
  8RCRDvgnextfmtprint
• Cased Pipeline Integrity Assessment Workshop
  https//primis.phmsa.dot.gov/meetings/MtgHome.mtg?
  mtg54
• Anomaly Assessment and Repair Workshop
  https//primis.phmsa.dot.gov/meetings/MtgHome.mtg?
  mtg55
• Congressional Hearing
• The Pipeline Inspection, Protection, Enforcement,
  and Safety Act of 2006 Implementation Review and
  Discussion of Safety Reassessment Intervals for
  Natural Gas Pipelines Subcommittee on Energy and
  Air Quality Wednesday, March 12, 2008
  http//energycommerce.house.gov/cmte_mtgs/110-eaq-
  hrg.031208.PIPE.shtml