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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. Outline. Natural Gas and Transportation Management of Public Risk Results of the IMP Program

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high consequence areas pipeline assessment intervals is there a need for change

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

outline
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
natural gas and transportation
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
slide5
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

more interstate natural gas pipeline information www ingaa org
More Interstate Natural Gas Pipeline Informationwww.ingaa.org
pipeline safety layers of protection example
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

natural gas transmission pipeline risk management biased by population density
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
slide13
660 ft.

660 ft.

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

pictorial of a high consequence area for natural gas overlaid on the class location system
Pictorial of a High Consequence Area for Natural Gas Overlaid on the Class Location System

Houses

Class 3

660 ft

HCA

30” Pipeline

1010 psig

14

slide15
Results of the IMP Program

(PHMSA)

Carlsbad

Number of Significant Incidents

Number of Fatalities

Number of Injuries

Hurricanes

Property Damage

types failures
Types Failures

Static Anomalies

Detrimental

Non - Detrimental

Time Independent Defects

Excavation Damage

Weather

Terrorist

Time Dependent Defects

Corrosion

Cracking

manage time dependent defects
Manage Time Dependent Defects

Manage Time Dependent Effects

Inline Inspection

Pressure Test

Direct Assessment

Other Approved Methods

slide28
Public Workshop to gather comments on Special Permit and Criteria Discussion for 7-year Reassessments

Location: Arlington, Virginia

Jan 18, 2008

ongoing initiatives to improve performance
Ongoing Initiatives to Improve Performance
  • Tools
  • Processes
  • Procedures
  • Implementation
conclusions
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
background material
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/PerformanceMeasures.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/?vgnextoid=4aeb8defc8de6110VgnVCM1000001ecb7898RCRD&vgnextchannel=5296519d7e818110VgnVCM1000009ed07898RCRD&vgnextfmt=print
    • Cased Pipeline Integrity Assessment Workshop https://primis.phmsa.dot.gov/meetings/MtgHome.mtg?mtg=54
    • Anomaly Assessment and Repair Workshop https://primis.phmsa.dot.gov/meetings/MtgHome.mtg?mtg=55
  • 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
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