Relevant bibliographies by topics / Leak test

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Leak test'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Leak test"

1

Thomas, Lynne A. "Leak Test Failures." Gastroenterology Nursing 28, no. 2 (2005): 179. http://dx.doi.org/10.1097/00001610-200503000-00095.

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Smith, J. H. "Tracheal tube leak test." Canadian Journal of Anaesthesia 41, no. 6 (1994): 549. http://dx.doi.org/10.1007/bf03011556.

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Tokumine, Joho, Hiroshi Iha, Yoshiaki Okuda, et al. "A comparison between low-flow leak test and oxygen flush leak test." Journal of Anesthesia 14, no. 4 (2000): 191–93. http://dx.doi.org/10.1007/s005400070004.

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Argalious, M. Y. "The Cuff Leak Test: Does It "Leak" Any Information?" Respiratory Care 57, no. 12 (2012): 2136–37. http://dx.doi.org/10.4187/respcare.02193.

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PETTIGNANO, ROBERT, SHARON E. HOLLOWAY, DONALD HYMAN, and MICHELE LaBUZ. "Is the Leak Test Reproducible?" Southern Medical Journal 93, no. 7 (2000): 683–85. http://dx.doi.org/10.1097/00007611-200007000-00009.

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PETTIGNANO, ROBERT, SHARON E. HOLLOWAY, DONALD HYMAN, and MICHELE LaBUZ. "Is the Leak Test Reproducible?" Southern Medical Journal 93, no. 7 (2000): 683–85. http://dx.doi.org/10.1097/00007611-200093070-00010.

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Parker, J. D. "Anaesthetic machine leak not detected by the universal leak test." Anaesthesia 74, no. 4 (2019): 545–46. http://dx.doi.org/10.1111/anae.14612.

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Kuang, Liuwei, Liang Ren, Linzhi Jing, Bang Wen, and Huarong Liu. "ICONE23-1252 STUDY ON PNEUMATIC LEAK TEST FOR IRRADIATED FUEL RODS." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2015.23 (2015): _ICONE23–1—_ICONE23–1. http://dx.doi.org/10.1299/jsmeicone.2015.23._icone23-1_127.

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Hogreve, Marc, and Nick Hutchinson. "Validating a Point-of-Leak Test." Genetic Engineering & Biotechnology News 37, no. 12 (2017): 22–23. http://dx.doi.org/10.1089/gen.37.12.10.

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Fisher, M. McD, and R. F. Raper. "The 'cuff-leak' test for extubation." Anaesthesia 47, no. 1 (1992): 10–12. http://dx.doi.org/10.1111/j.1365-2044.1992.tb01943.x.

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Dissertations / Theses on the topic "Leak test"

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Saffari, Yasaman. "Leak Test on High-Speed Separator." Thesis, KTH, Kemiteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-90477.

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High speed separators from Alfa Laval are widely in use for processing flammable and non-flammable liquids. The following work is focusing on the case of non-flammable liquid as the process liquid in case the working area around the equipment may contain quantities of explosive gases. As stated by Alfa Laval documentation, the major risk is leaking of the explosive atmosphere into the separator from the surrounding environment which may result in producing zone 1 or zone 2 of hazardous area classification. Zone 1: Area in which an explosive gas-air mixture is likely to occur for short periods in normal operation.1 Zone 2: Area in which an explosive gas-air mixture is not likely to occur, and if it occurs it will only exist for a very short time due to an abnormal condition.1 According to Alfa Laval design package, there is a need of continuous inert gas injection into the separator during the process in order to reduce the oxygen concentration and keep it in the safe level (inert gas purging) and this policy is aimed to meet the requirements of ATEX-directive 94/9/EC/2003. The objective of the current thesis is a wish to have a better understanding of the potential risks, evaluating them and try to find ways to ease the process. The outcome can be useful to make a basic instruction for further tests and simplifications as well. The separator GTN 50 is selected and hydrogen (1% concentration) is used to simulate the explosive atmosphere. The result of the tests indicates that the cooling down stage after normal operation is the only period in which hydrogen will leak into the separator, frame top part and it should be cleaned up before the next start up. A number of recommendations -Ventilation to the fresh air, Water discharges, Pressurized air injectionare also being tested and discussed. Ventilation to the fresh air and injection of pressurized air seem to be applicable A Standard Testing Flow chart is suggested and calculation on real case is considered. A number of additional ideas are also included in the last section.
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MURGAS, JOSE FRANCISCO CONSUEGRA. "NUMERICAL MODELING OF LEAK OFF TEST IN OIL WELLS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2011. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19630@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Em operações de perfuração, é importante ter uma estimativa do gradiente de fratura de determinada formação, como o objetivo de poder estimar o máximo peso da lama necessária para a próxima seção da formação rochosa, antes de colocar o revestimento. Por esse motivo, são realizados ensaios de Leak-Off para determinar a máxima pressão que a nova seção do poço pode sustentar sem fraturar ou perder fluido, sendo realizados durante a fase de perfuração do poço, nas formações imediatamente abaixo de cada sapata de revestimento. A finalidade deste estudo é realizar a simulação numérica deste ensaio usando um programa comercial de elementos finitos para calcular a pressão de Leak-Off, considerando a taxa de bombeamento como um dado de entrada do problema e a pressão na parede do poço como uma resposta. O trabalho abordará dois cenários: uma formação rochosa permeável e uma formação rochosa impermeável constituída de rocha de sal. Deste modo, para um estudo de uma análise real de um ensaio de Leak-Off em rocha permeável e rocha impermeável, torna-se necessário a utilização de modelos que considerem poroelasticidade e fluência, respectivamente. Para a caracterização do comportamento da rocha de sal foi usada uma lei de fluência de duplo mecanismo de deformação, que considera apenas os mecanismos de fluência: planar e indefinido. Os modelos estudados foram bidimensionais e analisados sobre a hipótese de deformação plana. A hipótese, de que a pressão de Leak-Off é atingida quando a tensão tangencial efetiva é igual a zero (calculada graficamente), foi considerada. Finalmente, foram simulados alguns casos para verificar os possíveis efeitos da alteração da permeabilidade e influência do fluido de pressurização no cálculo da pressão de Leak-Off em rocha permeável.<br>In drilling operations, it is important to have an estimate of the fracture gradient of certain formation, in order to being able to estimate the maximum mud weight required for the next section of the rock formation, before casing is placed. For this reason, Leak-Off tests are conducted to determine the maximum pressure that the new section of the well can support without fracturing or losing fluid, being made during the drilling phase of the well in formations immediately below each casing shoe. The purpose this study is to perform the numerical simulation of this test using a commercial finite element program to calculate the Leak-Off pressure, considering the pumping rate as an input data of the problem and pressure at the borehole wall as the answer. The work will address two cases: a permeable rock formation and an impermeable rock formation composed of salt rock. Thus, for studying a real analysis of a Leak-Off test in permeable and impermeable rock, it becomes necessary to use models that consider poroelasticity and creep, respectively. For the characterization of salt rock it was used a creep law of dual mechanism of deformation, which considers only the dislocation creep mechanisms: planar and undefined. The two-dimensional models were studied and analyzed under the assumption of plane strain. The hypothesis that the Leak-Off pressure is reached when the effective tangential stress is zero (estimated graphically), was considered. Finally, some cases were simulated to check the possible effects of changing the permeability and the influence of pressurized fluid in the calculation of Leak-Off pressure in the permeable rock.
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Velehradský, Petr. "KVANTIFIKACE PŘESNOSTI MĚŘENÍ TLAKOVÝCH ZTRÁT PŘI HODNOCENÍ PÓROVITOSTI HLINÍKOVÝCH ODLITKŮ." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228020.

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The diploma thesis deals with a matter of a leak testingo of the Schreiner devices in the company Kovolis Hedvikov a.s. The tested components are the heat exchangers made from alloy of aluminium used for automobiles. Due to the impact of porosity texture created during the components casting there is leaking. The analysis was accomplished to find out the most problematic parts of these components. Subsequently the testing and measuring were performed in order to classify the testing and detect its accuracy. The summary and suggested solutions of how to improve the accuracy of measuring of the aluminium components leaking are presented in the conclusion.
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Iwanaga, Mauricio Kiotsune. "Development of a virtual pipe test rig for testing acoustic correlators for leak detection in buried water pipes /." Ilha Solteira, 2019. http://hdl.handle.net/11449/183466.

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Orientador: Michael John Brennan<br>Resumo: Vazamentos em tubulações de água enterradas são considerados um importante problema já que uma grande quantidade de água é desperdiçada entre a planta de tratamento e os consumidores. Para lidar com tal problema, companhias de saneamento utilizam dispostivos para localizar vazamentos nas tubulações. Dispositivos de escuta e correlacionadores de ruídos são os equipamentos mais utilizados em campo pelas companhias de sanemaneto ao redor do mundo. Correlacionadores de ruídos são dispositivos usados na localização de vazamentos em tubulações enterradas através da estimativa do tempo de atraso entre os sinais medidos pelos sensores posicionados em ambos os lados de um suposto vazamento. Uma vez que as companhias de saneamento devem decidir qual tipo de correlacionador é o mais compatível com a sua rede de tubulações, elas devem realizar alguns testes para ajudar em tal decisão e para treinar os funcionários que operam estes dispositivos, os quais devem ser expostos a diferentes condições, tais como tubos de diferentes materiais e geometrias, diferentes tipos de solo, vazamentos com diferentes intensidades, etc. Neste contexto, o principal objetivo desta pesquisa é contribuir com esta necessidade através da elaboração de um dispositivo de bancada capaz de reproduzir as vibrações de um tubo causadas por um vazamento. O dispositivo, chamado de simulador virtual de vazamentos, é composto por um computador, um amplificador de potência com dois canais e dois shakers. Ruídos de vazamento... (Resumo completo, clicar acesso eletrônico abaixo)<br>Abstract: Leakage in buried water pipes is an important problem since a large amount of water is wasted between the treatment plant and the consumers. To deal with such a problem, water companies have used some devices to localize leaks in the pipe network. Listening devices and leak noise correlators are the most popular equipment used in the field by the water companies around the world. Leak noise correlators are important devices used to localize leaks in buried pipes by calculating the time delay between the signals measured by the sensors positioned either side of a suspected leak. Since water companies have to decide which leak noise correlator is more suitable for each pipe network, they have to carry out some field tests to assist in this decision and to train the personnel that handles such a device, which ideally must be exposed to different conditions, such as pipes with different materials and geometries, different types of soil, different leak strengths, etc. The main objective of this research project is to contribute with the necessity of the water companies by designing an indoor bench-top device capable to reproduce the pipe vibrations generated by a leak in the field. The device, called virtual pipe test rig, comprises a computer and a dual-channel power amplifier supplying two shakers. In the computer, leak noise is synthesized by using a model of a buried leaking pipe implemented using the software Matlab®. Since the systems, composed by the power amplifiers and th... (Complete abstract click electronic access below)<br>Mestre
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Bergstrand, Fredrik, Johan Bergstrand, and Håkan Gunnarsson. "Localization of Spyware in Windows Environments." Thesis, Blekinge Tekniska Högskola, Avdelningen för programvarusystem, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5391.

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This is a thesis about different methods that can be used to detect spyware. Methods included are Layered Service Provider, Internet Protocol Helper API, TDI filtering and API hooking. Some firewall testing applications, leak tests, that use methods that can be used by real spyware program to penetrate firewalls have also been examined. The goal was to develop a Windows 2000/XP program that is able to detect as many of our examined leak tests as possible. Our program uses the methods TDI filtering and API hooking for detection of spyware because our study showed that these methods were the best. To evaluate the program it was tested against our examined leak test programs. Our program managed to detect all leak tests except one.<br>Fredrik Bergstrand cfb@home.se Johan Bergstrand jb78@home.se Håkan Gunnarsson hakan.gunnarsson@klostersfalad.se
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DiFranco, James Michael. "Minimal Occlusive Pressure with Cuffed Endotracheal Tubes: A Comparison of Two Different Techniques to Ensure a Tracheal Seal." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471012142.

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Kayael, Burak. "An Investigation Of The Leak-off Tests Conducted In Oil And Natural Gas Wells Drilled In Thrace Basin." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614030/index.pdf.

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This study aims to analyze the leak-off tests carried out in the Thrace Basin of Turkey by Turkish Petroleum Corporation and find any relationship that may exist between leak-off test results and drilled formations as well as drilling parameters, such as mud weight, depth. The analysis of 77 leak-off tests indicated that there is no close correlation between the mud weight of test fluid and equivalent mud weight (fracture gradient) if the test is carried out within impermeable sections. On the other hand, the correlation between mud weight and equivalent mud weight increase while running the test within permeable-productive zones. It is also found that the leak-off test results are not dependent on the depth but the formation to be tested. The analyzed leak-off test results from Thrace Basin showed that the fracture gradient is not the limiting factor to set the casing of any section unless a gas show is observed during drilling operation which occurred only in 5 wells out of 78 wells analyzed.
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Yan, Dacong. "Program Analyses for Understanding the Behavior and Performance of Traditional and Mobile Object-Oriented Software." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406064286.

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Eide, Vegard Veiteberg. "Numerical Simulation of Extended Leak-Off Tests." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-27090.

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In-situ stresses are key information for well and formation integrity assessments, especially in difficult drilling operations such as high pressure high temperature wells, extended reach wells and in-fill drilling. During drilling, the minimum horizontal stress is best obtained by dedicated tests. In particular the extended leak-off test. Challenges associated with such tests are the quality of stress data obtained in complex stress regimes, difficult formations (plasticity, ductility, thermal effects) and difficult geometries. These conditions present the need for more reliable determination of in-situ stresses during drilling. This thesis was part of the full development of an extended leak-off test simulator for deep wells based on a modified discrete element method (MDEM) at SINTEF Petroleum. The overlying objective of MDEM as a fracturing simulator is modelling of dynamic fracture initiation and propagation in 3D. XLOT in deviated wells may be evaluated for information, and phenomena such as fracture twisting may be captured. The process of refining MDEM to become an XLOT simulator in low-permeable rock in 2D is described with results and discussion. In low permeability formations, the only volume available for the well fluid to flow into is the induced fracture volume. With single phase water as fracturing fluid in an open hole segment of unit length (modelled by MDEM, in 2D), this corresponds to a highly stiff and non-linear system, where fracture mechanics and fluid flow are intimately coupled. Change in flow rate immediately translates to fracturing rate. A full well volume attached to the fracturing simulator implies that decompressed volume will flow at high rates into the fracture at formation breakdown, inducing a large fracture. A sequentially coupled geomechanical and fluid flow model requires limited fracture extension per simulation timestep to ensure a stable hydromechanical coupling, which makes coupling of third model, the well, a non-trivial problem.Two schemes to couple a deep petroleum well to the MDEM fracturing simulator were developed in MATLAB, and applied to simulate XLOT in a 2000 mTVD well. Simulation results are presented. Flow-back through a fixed choke was implemented in the coupling algorithms in MATLAB.
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Li, Yongqiang. "Experimental Studies on the Mechanical Durability of Proton Exchange Membranes." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/29944.

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Three testing methods are proposed to characterize properties of fuel cell materials that affect the mechanical durability of proton exchange membranes (PEMs). The first two methods involved measuring the in-plane biaxial strength of PEMs and the biaxial hygrothermal stresses that occur in PEMs during hygrothermal cycles. The third method investigated the nonuniform thickness and compressibility of gas diffusion media which can lead to concentrated compressive stresses in the PEM in the through-plane direction. Fatigue and creep to leak tests using multi-cell pressure-loaded blister fixtures were conducted to obtain the lifetimes of PEMs before reaching a threshold value of gas leakage. These tests are believed to be more relevant than quasi-static uniaxial tensile to rupture tests because of the introduction of biaxial cyclic and sustained loading and the use of gas leakage as the failure criterion. They also have advantages over relative humidity cycling test because of the controllable mechanical loading. Nafion® NRE-211 membrane was tested at three different temperatures and the time-temperature superposition principle was used to construct a stress-lifetime master curve. Tested at 90oC, extruded Ion Power® N111-IP membrane was found to have longer lifetime than GoreTM-Select® 57 and Nafion NRE-211 membranes under the same blister pressure profiles. Bimaterial specimens fabricated by bonding a piece of PEM to a substrate material were used to measure the hygral stresses, compressive and tensile, in the PEM during relative humidity cycles. The substrate material and its thickness were carefully chosen so that stresses in the PEM could be obtained directly from the curvature of the bimaterial specimen without knowing the constitutive properties of the PEM. Three commercial PEMs were tested at 80oC by cycling the relative humidity between 90% and 0% and by drying the membrane to 0%RH after submersion in liquid water. Stress histories for all three membranes show strong time-dependencies and Nafion® NRE-211 exhibited the largest tensile stress upon drying. Besides in-plane stresses, hard spots in gas diffusion media (GDM) can locally overcompress PEMs in the out-of-plane direction and cause electrical shorting. In this study, GDM samples sealed with an impermeable Kapton® film on the surface were compressed with uniform air pressure and the nonuniform displacement field was measured with a three-dimensional digital image correlation technique. Hard spots as a result of the nonuniform thickness and compressibility of the GDM were found and their severities as stress risers are evident. Locally, a nominal platen compression (similar to bipolar plate land compression) of 0.68 MPa can lead to compressive stress as large as 2.30 MPa in various hard spots that are in the order of 100s µm to 1 mm in size.<br>Ph. D.
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Books on the topic "Leak test"

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Schmitz, Michael, and John A. Organiscak. A new leak test method for enclosed cab filtration systems. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Office of Mine Safety and Health Research, 2012.

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Julien, J. T. Leak and structural test of personnel airlock for LWR containments subjected to pressures and temperatures beyond design limits. Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1989.

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Howell, Maxwell Leo. Born to lead: Wallaby test captains. Celebrity Books, 2005.

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Pugh, Kenneth. Lean-agile acceptance test-driven development: Better software through collaboration. Addison-Wesley, 2011.

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Engineers, National Association of Corrosion. Criteria and test methods for cathodic protection of lead sheath cable. NACE, 1994.

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Johnson, Cynthia. Parent's guide to the LEAP 21 tests for grade 4. Simon & Schuster, 2000.

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Kutter, Bruce L. Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading: LEAP-UCD-2017. Springer Nature, 2020.

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Murnane, Richard J. Does acquisition of a GED lead to more training, post-secondary education, and military service for school dropouts? National Bureau of Economic Research, 1997.

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Papelis, Charalambos. Evaluation of cesium, strontium, and lead sorption, desorption, and diffusion in volcanic tuffs from Frenchman Flat, Nevada Test Site: Macroscopic and spectroscopic investigations. Desert Research Institute, 2003.

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W, Maresca J., and Risk Reduction Engineering Laboratory (U.S.), eds. Standard test procedures for evaluating leak detection methods: Pipeline leak detection systems. U.S. Environmental Protection Agency, Risk Reduction Engineering Laboratory, 1991.

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Book chapters on the topic "Leak test"

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Johnson, C. H., E. A. Druschitz, and A. P. Druschitz. "Ultrasonic Leak Test for Automotive Brake Caliper." In THERMEC 2006. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-428-6.429.

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Turk, Adam L., Scott T. Probst, and Gary J. Powers. "Verification of a chemical process leak test procedure." In Computer Aided Verification. Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/3-540-63166-6_11.

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Brock-Utne, John G. "Case 6: An Adjuvant to the Cuff-Leak Test." In Case Studies of Near Misses in Clinical Anesthesia. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-1179-7_6.

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Garcia, Ander, Juan Luis Ferrando, Ander Arbelaiz, Xabier Oregui, Andoni Bilbao, and Zelmar Etxegoien. "Soft Computing Analysis of Pressure Decay Leak Test Detection." In Advances in Intelligent Systems and Computing. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57802-2_29.

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Feingold, Daniel L., and Steven A. Lee-Kong. "Unexpected Findings: Anastomotic “Donut” Problems – Incomplete or Missing Donuts with a Negative Leak Test." In Colorectal Surgery Consultation. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11181-6_14.

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Rosenfield Boeira, Julia Naomi. "Test, Code, Test." In Lean Game Development. Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-3216-3_9.

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Ochoa, Maria Elena, Maria del Carmen Marín, Fernando Frutos-Vivar, et al. "Cuff-leak test for the diagnosis of upper airway obstruction in adults: a systematic review and meta-analysis." In Applied Physiology in Intensive Care Medicine 1. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28270-6_35.

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Sindalovskiy, Leonid N. "Leaky Aquifers." In Aquifer Test Solutions. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-43409-4_3.

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Rosenfield Boeira, Julia Naomi. "Test-Driven Development." In Lean Game Development. Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-3216-3_6.

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Bate, Jonathan, and Eric Rasmussen. "About the Text." In King Lear. Macmillan Education UK, 2009. http://dx.doi.org/10.1007/978-1-137-00436-9_2.

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Conference papers on the topic "Leak test"

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Neyer, Barry, John Adams, and Terry Stoutenborough. "Aerospace leak test requirements." In 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. American Institute of Aeronautics and Astronautics, 2000. http://dx.doi.org/10.2514/6.2000-3735.

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Addis, M. A., T. H. Hanssen, N. Yassir, D. R. Willoughby, and J. Enever. "A Comparison Of Leak-Off Test And Extended Leak-Off Test Data For Stress Estimation." In SPE/ISRM Rock Mechanics in Petroleum Engineering. Society of Petroleum Engineers, 1998. http://dx.doi.org/10.2118/47235-ms.

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Baral, Dipika, Vidita Tilva, and Rohit Singh. "Leak test for Cryogenic Heat Exchanger." In 2017 International Conference on Circuit ,Power and Computing Technologies (ICCPCT). IEEE, 2017. http://dx.doi.org/10.1109/iccpct.2017.8074190.

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Apps, Chris, Istemi Ozkan, Tania Rizwan, Marzie Derakhshesh, and Scott Medynski. "Large Scale Test Apparatus to Test External Leak Detection Technologies." In 2014 10th International Pipeline Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/ipc2014-33579.

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When it comes to evaluating traditional computational leak detection technologies pipeline operators have a suite of simulated testing methods available. In the last several years however External Leak Detection Technologies have become more mature and potentially could provide operators with another layer of leak detection with more sensitivity than seen in traditional methods. The challenge with these technologies is in the evaluation of their sensitivity, reliability, and robustness. ENBRIDGE INC (Enbridge) and C-FER Technologies 1999 Inc. (C-FER) begun a comprehensive study to assess the state-of-the-art external, continuously distributed sensors for leak detection in early 2012. Initially, a technology review was undertaken to identify commercial, off-the-shelf technologies with the potential to detect small leaks of oil from buried pipelines. From this literature review, four technologies were identified; Distributed Temperature Sensing (DTS), Distributed Acoustic Sensing (DAS), Vapor Sensing Tubes (VST), and Hydrocarbon Sensing Cables (HSC). All four methods require proprietary materials and technology, which have had limited independent testing efforts to date. To evaluate these four leak detection methods and their vendors in an objective way, Enbridge and C-FER initiated the design and construction of a large-scale External Leak Detection Experimental Research apparatus (ELDER) that can accommodate a full-size segment of pipeline within a trench, at the same scale used in pipeline construction in North America. An instrumented pipe segment is buried in the trench with sensing cables laid alongside. The apparatus generates leaks with controlled variables including rate, pressure and temperature, and at various locations to accurately represent pipeline leaks. This paper summarizes the literature review on the four selected leak detection technologies that were identified as candidates for large-scale evaluation. The discussion will also include features of the ELDER apparatus, and re-engineered pipeline construction techniques that were required to accurately represent a full-scale pipeline trench within a laboratory environment.
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Lapsien, J. "B7.3 - Leak Test of Sensors with the Test Medium compressed Air." In AMA Conferences 2013. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2013. http://dx.doi.org/10.5162/sensor2013/b7.3.

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Geng-lin, Wang, Wang Li-yan, Dong Li-Jun, and Huang Zheng. "Study on Leak Rate Formula and Criterion for Helium Mass Spectrometer Fine Leak Test." In 2007 8th International Conference on Electronic Packaging Technology - ICEPT '07. IEEE, 2007. http://dx.doi.org/10.1109/icept.2007.4441537.

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Daneti, Marllene. "Modeling Burst Interferences - A Practical Tool for Studying Leak Signals." In 2007 2nd International Design and Test Workshop. IEEE, 2007. http://dx.doi.org/10.1109/idt.2007.4437440.

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Yan, Feng, Qing Miao, Xiangdong Xue, Yubin Wang, Daquan Li, and Jingnan Zhang. "Research on Leak Test for Long Distance Gas Pipline." In 2012 9th International Pipeline Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ipc2012-90068.

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The main purpose of pre-service leak test is to prove the tightness of the pipeline system. It plays an important role to guarantee the safety operating of pipeline. However, the duration of leak test is different in different countries. If the duration of tightness test is longer, the tightness level can be sufficiently detected, which is benefit for pipeline safe operating, but the cost and the time of project must be extended; if the duration of tightness test is shorter, the defect of pipeline can not be fully exposed, which may be left hidden trouble for pipeline safe operating. Meanwhile, the tightness test may be influenced by many factors, for example the test medium, pipeline capacity, pressure, ambient temperature variation, leak detection methods, and so on. Therefore, it is unreasonable to leak test with same duration for different kinds of gas pipeline, which regulated in some standards, for example CSA Z662-11, BS EN1594:2000, ISO 13623:2008, GB 50251-2003, and so on. At the same time, those standards all regulated that the duration of tightness test should be properly extended while the pipeline capacity and ambient temperature variation obviously affect the accuracy of leak test, but the definite value is not regulated. In addition, they also regulated that the pressure increases or decreases during leak test shall be acceptable provided that it can be demonstrated through calculations that the pressure change is caused by ambient temperature variations, but there is no explicit calculation method. Now, the specified duration of leak test in different standards are all based on the engineering experience. Because there is no rational theory way, it makes the identification and modification of the duration for different kinds of pipeline become blind. Based on the theory of fluid mechanics, material mechanics, elastic mechanics, a mathematical model about the duration of leak test for long distance gas pipeline is developed for the first time. The influences of the test medium, pipeline capacity, pressure, ambient temperature variation and other factors which may impact the duration of leak test are synthetically considered in the model. The experimental verification shows that the result calculated by the model is accurate. It can provide reliable theoretical guidance for determining reasonable leak test duration for long distance gas pipeline.
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chen, wenjuan, xuhui peng, bo wu, and peng li. "Leak rate test method of liquid crystal phase shifter." In Metasurface Wave and Planar Optics, edited by Minghui Hong, Xiong Li, Xiangang Luo, Changtao Wang, Xiaoliang Ma, and Mingbo Pu. SPIE, 2019. http://dx.doi.org/10.1117/12.2507343.

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Danchenko, Valeriy G. "Preflight Leak-Test for Fuel System of Propulsion System." In 54th International Astronautical Congress of the International Astronautical Federation, the International Academy of Astronautics, and the International Institute of Space Law. American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.iac-03-s.p.27.

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Reports on the topic "Leak test"

1

Lujan, Therese, and Mike Steinzig. Sealed Vessel Leak Test [Slides]. Office of Scientific and Technical Information (OSTI), 2021. http://dx.doi.org/10.2172/1811847.

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2

HUBER, J. H. ENRAF annulus leak detector development test. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/782315.

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Del Signore, John. 75K Leak Test of October 2014. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1164723.

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4

Jaques, A. Argon Spill Trough Bellows - Leak Test. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/1031843.

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5

Richards, B. T. ICPP water inventory study leak test report. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/142559.

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SHERRELL, D. L. MCO combustible gas management leak test acceptance criteria. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/782255.

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HUBER, J. H. Test Report for ENRAF Annulus Leak Detector Development. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/797680.

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Rawls, George, Lisa Ward, Elizabeth Kelly, and Douglas Veirs. 3013 INNER CAN LID LEAK TEST SYSTEM DEVELOPMENT. Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1545504.

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Whitehurst, R., K. McCracken, and J. N. Papenfuss. K West basin isolation barrier leak rate test. Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/10119732.

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AL Ward and GW Gee. Vadose zone transport field study: Detailed test plan for simulated leak tests. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/756986.

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