scholarly journals Case History of Local Wrinkling of a Pipeline

2000 ◽  
Author(s):  
S. A. Wilkie ◽  
R. M. Doblanko ◽  
S. J. Fladager
Keyword(s):  
Structural Design ◽  
Structural Integrity ◽  
Pipe Wall ◽  
Oil Pipeline ◽  
Field Instrumentation ◽  
Discontinuous Permafrost ◽  
Pipe Line ◽  
History Of ◽  
Structural Stresses

Enbridge Pipelines (NW) Inc. (formerly Interprovincial Pipe Line (NW) Ltd.) owns and operates a buried 323mm diameter crude oil pipeline from Norman Wells, NWT to Zama, AB. The pipeline is approximately 869 km in length, with the route following a portion of the Mackenzie River Valley in the Northwest Territories. The pipeline routing is through discontinuous permafrost that has the potential to interact with the pipeline through frost heave, slope movement and thaw settlement that can produce extreme structural stresses in the pipe wall. Given the proper conditions, these stresses may localize and the pipeline will deform plastically, causing pipe wall wrinkling. This paper reviews the general structural design and discusses the inspection and monitoring of the structural integrity of the pipeline, as well as the intervention criteria used to determine when structural mitigation is required. This case study will discuss the discovery of a wrinkle from internal inspection pig data, field dig verification, installation and monitoring of field instrumentation and the pipeline repair technique that was utilized.

Pipeline Integrity Design for Differential Settlement in Discontinuous Permafrost Areas

1996 ◽  
Author(s):  
Z. Joe Zhou ◽  
Raymond P. Boivin ◽  
Alan G. Glover ◽  
Phil J. Kormann
Keyword(s):  
Structural Integrity ◽  
Pipe Wall ◽  
Cost Effective ◽  
Differential Settlement ◽  
Pipeline System ◽  
Design Problems ◽  
Pipe Wall Thickness ◽  
Discontinuous Permafrost ◽  
Design Options ◽  
Effective Design

The NOVA Gas Transmission Ltd. (NGTL) gas pipeline system is expanding northwards as the producers search for and find new gas reserves. This growth has taken the system into the discontinuous permafrost zone, and also into new design problems. One such problem is the structural integrity of a pipeline subjected to the settlement differentials that occur between frozen and unfrozen soils. Adequate integrity design for differential settlement is required by design codes, such as CSA Z662, but the procedures and criteria must be established by the pipeline designers. This paper presents the methodology of pipeline integrity design for differential settlements used on a number of pipeline projects in Northwest Alberta. Outlined in the paper are the procedures, rationales and models used to: (a) locate discontinuous permafrost; (b) quantify the potential differential settlement; (c) predict pipeline stresses and strains; (d) establish strain limits; and (e) determine the pipe wall thickness to withstand those potential differential settlements. Several design options are available and are briefly discussed. For the projects mentioned, the heavy wall pipe option was identified as a cost effective design for medium to large differential settlements.

Press Propaganda and Subaltern Agents of Pan-Islamic Networks in the Muslim Mediterranean World prior to World War I

2018 ◽  
Author(s):  
Odile Moreau
Keyword(s):  
Middle East ◽  
World War I ◽  
North Africa ◽  
World War ◽  
Subaltern Studies ◽  
Resistance Movements ◽  
The Press ◽  
Mediterranean World ◽  
History Of

This chapter explores movement and circulation across the Mediterranean and seeks to contribute to a history of proto-nationalism in the Maghrib and the Middle East at a particular moment prior to World War I. The discussion is particularly concerned with the interface of two Mediterranean spaces: the Middle East (Egypt, Ottoman Empire) and North Africa (Morocco), where the latter is viewed as a case study where resistance movements sought external allies as a way of compensating for their internal weakness. Applying methods developed by Subaltern Studies, and linking macro-historical approaches, namely of a translocal movement in the Muslim Mediterranean, it explores how the Egypt-based society, al-Ittihad al-Maghribi, through its agent, Aref Taher, used the press as an instrument for political propaganda, promoting its Pan-Islamic programme and its goal of uniting North Africa.

Turning Aliens into Socialists

2010 ◽  
Vol 1 (1) ◽  
pp. 75-93
Author(s):  
Jessica Moberg
Keyword(s):  
Outer Space ◽  
The United States ◽  
Second World War ◽  
World War ◽  
History Of ◽  
Swedish History ◽  
Second World ◽  
The Universe ◽  
Highly Evolved

Immediately after the Second World War Sweden was struck by a wave of sightings of strange flying objects. In some cases these mass sightings resulted in panic, particularly after authorities failed to identify them. Decades later, these phenomena were interpreted by two members of the Swedish UFO movement, Erland Sandqvist and Gösta Rehn, as alien spaceships, or UFOs. Rehn argued that ‘[t]here is nothing so dramatic in the Swedish history of UFOs as this invasion of alien fly-things’ (Rehn 1969: 50). In this article the interpretation of such sightings proposed by these authors, namely that we are visited by extraterrestrials from outer space, is approached from the perspective of myth theory. According to this mythical theme, not only are we are not alone in the universe, but also the history of humankind has been shaped by encounters with more highly-evolved alien beings. In their modern day form, these kinds of ideas about aliens and UFOs originated in the United States. The reasoning of Sandqvist and Rehn exemplifies the localization process that took place as members of the Swedish UFO movement began to produce their own narratives about aliens and UFOs. The question I will address is: in what ways do these stories change in new contexts? Texts produced by the Swedish UFO movement are analyzed as a case study of this process.

A Case Study on the Process of Creating Interests in History of History-Deokhu

2019 ◽  
Vol 58 (1) ◽  
pp. 147-159
Author(s):  
Young-Seok Seo ◽  
Bong-Seok Kim
Keyword(s):  
History Of

Scales and Units

2018 ◽  
Author(s):  
Kathryn M. de Luna
Keyword(s):  
Language Change ◽  
Historical Linguistics ◽  
Bantu Languages ◽  
The North ◽  
First Case ◽  
Linguistic Evidence ◽  
River Region ◽  
History Of ◽  
Alternative Approaches

This chapter uses two case studies to explore how historians study language movement and change through comparative historical linguistics. The first case study stands as a short chapter in the larger history of the expansion of Bantu languages across eastern, central, and southern Africa. It focuses on the expansion of proto-Kafue, ca. 950–1250, from a linguistic homeland in the middle Kafue River region to lands beyond the Lukanga swamps to the north and the Zambezi River to the south. This expansion was made possible by a dramatic reconfiguration of ties of kinship. The second case study explores linguistic evidence for ridicule along the Lozi-Botatwe frontier in the mid- to late 19th century. Significantly, the units and scales of language movement and change in precolonial periods rendered visible through comparative historical linguistics bring to our attention alternative approaches to language change and movement in contemporary Africa.

Case Study: Rome's House of Memory and History: The Politics of Memory and Public Institutions

2012 ◽  
Author(s):  
Alessandro Portelli
Keyword(s):  
Oral History ◽  
Cultural Policy ◽  
Public Institutions ◽  
Politics Of Memory ◽  
Political Events ◽  
History Of ◽  
Ambitious Program ◽  
The City

This article centers around the case study of Rome's House of Memory and History to understand the politics of memory and public institutions. This case study is about the organization and politics of public memory: the House of Memory and History, established by the city of Rome in 2006, in the framework of an ambitious program of cultural policy. It summarizes the history of the House's conception and founding, describes its activities and the role of oral history in them, and discusses some of the problems it faces. The idea of a House of Memory and History grew in this cultural and political context. This article traces several political events that led to the culmination of the politics of memory and its effect on public institutions. It says that the House of Memory and History can be considered a success. A discussion on a cultural future winds up this article.

The Wolf Man’s Glückshaube: Rereading Sergei Pankejeff’s Memoir

2019 ◽  
Vol 67 (5) ◽  
pp. 789-814
Author(s):  
Anat Tzur Mahalel
Keyword(s):  
Complex Matrix ◽  
Neurotic Symptom ◽  
History Of ◽  
The Veil ◽  
Wolf Man

A comparative reading of Freud’s canonical case study “From the History of an Infantile Neurosis” (1918) and the memoir written by the protagonist of that study, Sergei Pankejeff, known as the Wolf Man (1971a), centers on the complex matrix of meanings embodied in the act of lifting the veil. The neurotic symptom of a veil seemingly in front of the analysand’s eyes is interpreted by Freud as a repetition of his birth in a Glückshaube (German for “caul,” literally a “lucky hood”). The veil is represented as an ambivalent object both for Freud and for Pankejeff, who are enticed by the sense of a final truth behind the veil yet constantly doubt the possibility of grasping it. For Freud, psychoanalysis is the very process of lifting the veil, yet his analysand remained for him an unsolved riddle. Pankejeff, in a volume dedicated to his identity as the Wolf Man (Gardiner 1971a), created an autobiographical text that deliberately avoids telling the story of the analysand, thus drawing a veil over his story. The paradox embodied in lifting the veil is discussed in relation to Walter Benjamin’s distinction between materiality and truth and his notion of the inherent unity of the veil and the veiled (1925).

Progressive Law, Activism, and Lawyering in an Age of Preemption

2021 ◽  
Vol 46 (1) ◽  
pp. 252-267
Author(s):  
Rashmi Dyal-Chand
Keyword(s):  
Working Conditions ◽  
Local Level ◽  
Global Supply Chain ◽  
Environmental Movements ◽  
Improve Working ◽  
Detailed History ◽  
History Of ◽  
State And Local ◽  
Core Questions

Preemption is one of the most important legal doctrines for today’s progressives to understand because of its power to constrain progressive policymaking and social movement lawyering at the state and local level. By examining the detailed history of a decades-long campaign by the labor and environmental movements to improve working conditions in an industry at the heart of the global supply chain, Scott L. Cummings’s Blue and Green: The Drive for Justice at America’s Port (2018) provides a case study about the doctrine and impacts of preemption. The study also inspires lawyers and activists alike to reexamine core questions of factual relevance, representation and voice, and precedent.

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