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PRCI PR-302-03152
- Basics of Metal Fatigue in Natural Gas Pipeline Systems - A Primer for Gas Pipeline Operators
- Report / Survey by Pipeline Research Council International, 11/01/2004
- Publisher: PRCI
$6.00$12.00
L52270e
Keifner & Associates
Need: The natural gas pipeline industry is rapidly implementing comprehensive integrity management practices to meet the demands of new regulatory imperatives and public interests. These new demands require formal integrity management planning programs be developed and applied where pipeline failures could affect "High Consequence Areas". A formal integrity management plan (IMP) incorporates some process for identifying threats to a pipeline's integrity. Such threats come in many forms and are uniquely dependent on a wide range of attributes associated with an individual pipeline segment. Interest (or concern) has arisen regarding metal fatigue as one such possible integrity threat. We know from some pipeline failures that occasionally and under certain circumstances, fatigue may constitute a potential threat.
Result: The cumulative body of knowledge derived by theory, test, and experience on the subject of fatigue and its effects on piping, pressurized equipment, and welded structures is vast in scope and detail, and it is not the intention of this document to summarize that. Rather, it is intended that this document provide natural gas pipeline operators and others interested in natural gas pipeline safety with a useful understanding of the extent to which fatigue could pose a legitimate and actionable safety threat, as well as to demonstrate the authors' opinion that in most respects, fatigue remains a comparatively minor risk component of the overall spectrum of threats to natural gas pipeline safety.
Benefit: In order to meet the objectives and requirements of this rule: 49 CFR Part 192, Subpart O, "Implementing Integrity Management", Paragraph 192.917(e)(2), a pipeline operator must be able to discern what types of pipe or piping construction are susceptible to fatigue, what modes of pipeline operation or situations are conducive to fatigue, the consequences of a fatigue-related incident, and what actions could be taken to mitigate the threat. At the request of the Pipeline Research Council International (PRCI), the Gas Technology Institute (GTI), and the Interstate Natural Gas Association of America (INGAA) this review was undertaken to provide fundamental information to gas pipeline operators to enable them to address issues of fatigue as they pertain to natural gas pipelines. In so doing, the document will explore the questions "What is fatigue?", "Where can it occur in a gas pipeline facility?", and "What can be done about it?"
Keifner & Associates
Need: The natural gas pipeline industry is rapidly implementing comprehensive integrity management practices to meet the demands of new regulatory imperatives and public interests. These new demands require formal integrity management planning programs be developed and applied where pipeline failures could affect "High Consequence Areas". A formal integrity management plan (IMP) incorporates some process for identifying threats to a pipeline's integrity. Such threats come in many forms and are uniquely dependent on a wide range of attributes associated with an individual pipeline segment. Interest (or concern) has arisen regarding metal fatigue as one such possible integrity threat. We know from some pipeline failures that occasionally and under certain circumstances, fatigue may constitute a potential threat.
Result: The cumulative body of knowledge derived by theory, test, and experience on the subject of fatigue and its effects on piping, pressurized equipment, and welded structures is vast in scope and detail, and it is not the intention of this document to summarize that. Rather, it is intended that this document provide natural gas pipeline operators and others interested in natural gas pipeline safety with a useful understanding of the extent to which fatigue could pose a legitimate and actionable safety threat, as well as to demonstrate the authors' opinion that in most respects, fatigue remains a comparatively minor risk component of the overall spectrum of threats to natural gas pipeline safety.
Benefit: In order to meet the objectives and requirements of this rule: 49 CFR Part 192, Subpart O, "Implementing Integrity Management", Paragraph 192.917(e)(2), a pipeline operator must be able to discern what types of pipe or piping construction are susceptible to fatigue, what modes of pipeline operation or situations are conducive to fatigue, the consequences of a fatigue-related incident, and what actions could be taken to mitigate the threat. At the request of the Pipeline Research Council International (PRCI), the Gas Technology Institute (GTI), and the Interstate Natural Gas Association of America (INGAA) this review was undertaken to provide fundamental information to gas pipeline operators to enable them to address issues of fatigue as they pertain to natural gas pipelines. In so doing, the document will explore the questions "What is fatigue?", "Where can it occur in a gas pipeline facility?", and "What can be done about it?"
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