Plastic Pipe Failure Analysis

2008 ◽  
Author(s):  
Julie K. Maupin
Keyword(s):  
United States ◽  
Slow Crack Growth ◽  
The United States ◽  
Management Plan ◽  
Third Party ◽  
Small Scale ◽  
United States Department ◽  
Pipe Failure ◽  
Plastic Pipe ◽  
Integrity Management

The Gas Technology Institute is currently addressing the risks and threats to plastic pipes through research sponsored by the United States Department of Transportation, Pipeline and Hazardous Materials Safety Administration. With the upcoming proposed rulemaking, the United States distribution companies will be required to implement a distribution integrity management plan. In developing an integrity management plan, it is key to understand system risks and threats and with 39.6 million plastic services and nearly 620,000 miles of plastic gas main, the threats to plastic pipe need to be addressed. The research discussed in this paper identifies the types of failures that affect plastic piping, excluding third party damage. The paper also describes the most common cause of leaks, slow crack growth, as well as root cause analysis of a pipe removed from service due to leaking. The cause of leaks for five other pipe segments is also discussed. The final topic of this paper is rapid crack propagation and small-scale steady state testing.

A Streamlined Approach for Pipeline Integrity Management

2004 ◽  
Author(s):  
Todd R. Porter ◽  
James E. Marr
Keyword(s):  
The United States ◽  
Regulatory Compliance ◽  
Management Plan ◽  
Assessment Tools ◽  
Baseline Risk ◽  
Initial Assessment ◽  
United States Department ◽  
Integrity Assessment ◽  
Integrity Management ◽  
Near Term

Formulating and implementing an integrity management plan (IMP) that satisfies Regulatory compliance requirements as mandated in the United States Department of Transportation (US-DOT, CFR 192 / 195) is a significant undertaking. The initial implementation step as defined in the regulations, is to identify high consequence areas (HCA’s or “covered segments”, and the integrity threats that could potentially impact the pipeline. These threats drive the data requirements, i.e. the minimal data sets required to address and evaluate these threats. This data must be gathered, aligned, integrated and technically analyzed (i.e. use of threat models) in a consistent and systematic manner. A baseline / risk assessment is then conducted using this data with the integrity threat models — to identify potentially higher risk areas within a system, individual lines, pipe segments, joints or specific points on the pipelines. The pipeline analysis normally includes time dependent, time independent and stable threats. Integrity management decisions are made based on the outcome of this initial assessment. This leads to selection of integrity assessment tools such as In Line Inspection (ILI) technologies, Direct Assessment (DA), Hydro Static testing, other methods, or combinations thereof. The outcome of the integrity assessment is used to develop an optimal, prioritized repair & mitigation program. In both regulated and non-regulated environments, there is critical need to prioritize and address immediate and near term repair situations a tactical approach. In order to effectively implement an IMP, a management system is normally required that captures the work process of the integrity team and delivers rapid, accurate, and economic decision support. Efficiencies can be realized with a well coordinated approach to data acquisition, management, and analysis. Tuboscope provides an integrated pipeline solution (TIPS) approach to streamline these processes, and an Integrity Management Vehicle LinaViewPRO™, to manage, analyze and present the results of the integrity analysis. In the quest for regulatory compliance and subsequent maintenance of the line, this paper will present an integrity process overview, implementation, results, and benefits from operating hazardous liquid and gas transmission pipelines integrity projects.

Photovoltaics in the United States Department of Defense

1996 ◽  
Author(s):  
J. F. Hoelscher ◽  
R. Ducey ◽  
G. D. Smith ◽  
L. W. Strother ◽  
C. Combs
Keyword(s):  
United States ◽  
Department Of Defense ◽  
The United States ◽  
United States Department ◽  
States Department

scholarly journals Exotic Haemaphysalis longicornis (Acari: Ixodidae) in the United States: Biology, Ecology, and Strategies for Management

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Brittany L Schappach ◽  
Rayda K Krell ◽  
Victoria L Hornbostel ◽  
Neeta P Connally
Keyword(s):  
United States ◽  
Vector Competence ◽  
The United States ◽  
United States Department ◽  
Haemaphysalis Longicornis ◽  
Life Stages ◽  
Department Of Agriculture ◽  
Management Options ◽  
Significant Public Health ◽  
Multiple Pathogens

Abstract The Asian longhorned tick (ALT), Haemaphysalis longicornis Neumann (Acari: Ixodidae), is a three-host tick that was first detected outside of United States Department of Agriculture (USDA) quarantine in Hunterdon County, New Jersey, in 2017 and subsequently found in another 14 states. In its native Asia, and where it has become established in Australia and New Zealand, ALTs feed on a variety of hosts and are economically important livestock pests and competent vectors of multiple pathogens to humans and other animals. The degree to which ALT will become a persistent livestock pest or competent vector for introduced or existing pathogens in the United States is yet unclear. Because of its vast host availability, ability to reproduce asexually, known vector competence, and the presence of multiple life stages on hosts, the expansion of ALT establishment in the United States is expected, and is a significant public health and veterinary concern. In this paper, we discuss the biology, geographical distribution, life cycle and seasonal activity, reproduction, identification, medical and veterinary implications, management options, and future concerns in the United States.

Transformation of the US Veterans Health Administration

2006 ◽  
Vol 1 (2) ◽  
pp. 99-105 ◽  
Author(s):  
Jonathan B. Perlin
Keyword(s):  
United States ◽  
Health Care ◽  
Veterans Health Administration ◽  
The United States ◽  
Veterans Affairs ◽  
United States Department ◽  
Veterans Health ◽  
Department Of Veterans Affairs ◽  
Health Administration ◽  
The Us

Ten years ago, it would have been hard to imagine the publication of an issue of a scholarly journal dedicated to applying lessons from the transformation of the United States Department of Veterans Affairs Health System to the renewal of other countries' national health systems. Yet, with the recent publication of a dedicated edition of the Canadian journal Healthcare Papers (2005), this actually happened. Veterans Affairs health care also has been similarly lauded this past year in the lay press, being described as ‘the best care anywhere’ in the Washington Monthly, and described as ‘top-notch healthcare’ in US News and World Report's annual health care issue enumerating the ‘Top 100 Hospitals’ in the United States (Longman, 2005; Gearon, 2005).

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