Relevant bibliographies by topics / Pipe brazing

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

Academic literature on the topic 'Pipe brazing'

Author: Grafiati
Published: 3 June 2025
Last updated: 6 July 2025

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Journal articles on the topic "Pipe brazing"

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Li, Yu Long, Jin Yang, Wei Li, and Ye Xiao Yu. "Brazing of Low Carbon Steel Automotive Radiator Pipe Using of Cu-Zn Alloy." Advanced Materials Research 233-235 (May 2011): 2718–21. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.2718.

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In order to join the automotive radiator pipe with high-quality and high-efficiency, flame and induction brazing experiments of steel radiator were carried out using Cu-Zn alloy. Results show that Cu-Zn brazing filler metal can wet the steel well under different heating conditions. The average tensile-shear strength of the brazed joints was more than 400MPa. Brazing experiments of automotive radiator pipe were carried out for comparing the heating methods. Results show that the joints acquired by the induction brazing method were much better in the appearance, further; the amounts of brazing alloy were relatively less. Brazed radiator pipes were then electroplated, and sealability tests of the brazed pipe were investigated, which indicated the pipes and joints remained in good condition after the tests.
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Pan, Chuan Jie, Peng Yuan Lee, Bing Lin Hou, et al. "Research of Thermal Anchor Attachment for ITER Magnet Supports." Advanced Materials Research 189-193 (February 2011): 3462–65. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.3462.

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Thermal anchor is one of the key components in ITER magnet supports to maintain the low temperature for superconductor coils. The sufficient attachment of the cooling pipe to the support plates is needed to minimize the risk of helium leakage. Brazing is one of the best choices. Three kinds of special brazing filler, including SnPb brazing filler, Ag-based and Cu-based brazing filler, were developed, which have good thermal conductivity, and toughness for brazing connection of SS 316LN at both room temperature and 77K environment. Some brazing technologies, including induction brazing, vaccum brazing, fire brazing, and arc brazing, have being investigated.
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Codrean, Cosmin, Dragoş Buzdugan, Bogdan Radu, and Viorel Aurel Şerban. "Induction Brazing of Copper Parts Using Amorphous Brazing Alloys." Materials Science Forum 907 (September 2017): 206–13. http://dx.doi.org/10.4028/www.scientific.net/msf.907.206.

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Brazing alloys with amorphous structure have excellent technological properties (tensile, wetting), having a self-fluxing character. The brazed joints have good mechanical and corrosion resistance. In this work an amorphous alloy, ribbon form, for brazing of copper pipe components, was elaborated. The brazed joints were analyzed by optical and electronic microscopy. The brazing alloy is self-fluxing and has good tensile and wetting properties. The structure in the brazed joint is monophasic due to the optimization of the process parameters (voltage and brazing time).
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Xia, Tian Dong, Xiao Li Liu, Qing Lin Li, and Wei Yuan Yu. "The Brazing of Copper Pipe and Aluminum Pipe Based on the 4R." Advanced Materials Research 476-478 (February 2012): 721–25. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.721.

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The copper-aluminum pipe has been widely used in the refrigeration industry. With the increases of the scrap rate in electronic products, the recycle and remanufacturing of Cu-Al brazed joints becomes the focus. In this study, introduced the green welding, which will improve the recycle ability of the Cu-Al brazed joints from technological design source. The experiment results shows that it is possible to improve the remanufacturing and the mechanical properties of Cu-Al brazed joints with the appropriate lap length,and it complies with the green welding design concept when the lap length of Cu-Al brazed joints is 5 mm.
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TAKEMOTO, Tadashi, Masami MIZUTANI, Ikuo OKAMOTO, Tetsuo ABIKO, and Shousuke IWASAKI. "Effect of pipe diameter on fillet formation during brazing of aluminum pipe and sheet." Journal of Japan Institute of Light Metals 40, no. 5 (1990): 344–50. http://dx.doi.org/10.2464/jilm.40.344.

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Nurbanasari, Meilinda, Tri Sigit Purwanto, Tarsisius Kristyadi, and Deden Syamsurizal. "Failure on Bearing Cooler Coils Connector of Hydroelectric Power Plant." Key Engineering Materials 805 (June 2019): 185–90. http://dx.doi.org/10.4028/www.scientific.net/kem.805.185.

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Bearing cooler coils connector of 175 MW hydropower plant experienced premature leaks after one year operation and caused an unscheduled shutdown. To avoid the same failure in the future, the leaking bearing cooler coils connector was investigated. Nondestructive tests, such as chemical composition analysis, hardness test, metallographic test, characterization of the filler brazing by scanning electron microscopy – energy dispersive X-ray spectroscopy were conducted. The results confirmed that the bearing cooler coils connector consisted of two types of material namely the flange material which was made of stainless steel 304 and the pipe material which was a Cu/Ni 90/10 and were joined together using brazing process. It was a clearly evidence that leaks occurred in the brazing area and the leakage was due to improper brazing process. It was shown by the excessive gap and a lot of porosity.
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Chen, Jiajia, Yucan Fu, Qilin Li, Junjie Gao, and Qingshan He. "Investigation on induction brazing of revolving heat pipe grinding wheel." Materials & Design 116 (February 2017): 21–30. http://dx.doi.org/10.1016/j.matdes.2016.11.057.

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Kukartsev, V. V., A. I. Cherepanov, S. G. Dokshanin, S. N. Ezhemanskaya, L. N. Korpacheva, and P. Yu Vaitekunaite. "Induction brazing technology for pipeline connections of an automated gas metering unit." Journal of Physics: Conference Series 2094, no. 4 (2021): 042020. http://dx.doi.org/10.1088/1742-6596/2094/4/042020.

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Abstract The article discusses the connection of pipelines of an automated gas metering installation. Welding is considered as the main method of connecting pipelines and an induction pack of heating methods as proposed by the authors. In the work, a threaded connection is calculated according to the method of Anuryev V.I. On the basis of the calculations carried out by the authors using formulas from the designer’s handbook, a schematic diagram of the pipe fastening in the process of induction soldering is developed. A schematic diagram of a pipe bend is also being developed. The approach proposed by the authors will repeat the connection of pipelines of oil and gas equipment using induction packs and increase the reliability of brazed structures.
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ŞAFAK, Gökhan, Simge İRİZALP, and Burçak Kardelen KÖROĞLU. "Study on microstructure and mechanical performance of copper/brass brazing joint with Ag brazing fillers." Deu Muhendislik Fakultesi Fen ve Muhendislik 24, no. 72 (2022): 1033–47. http://dx.doi.org/10.21205/deufmd.2022247230.

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Ag is used as a useful alloying element in brazing filler metals. It is clear that the addition of Ag has a positive effect on the melting temperature, wettability, conductivity and mechanical property of the filler metals. For this reason, although Ag is very expensive, it is still widely used in many research and production. In this study, it was focused on obtaining both high strength and cost-effective brazing joints by using filler metals containing different levels of Ag. Melting-solidification temperatures, mechanical properties and microstructures of brazing joints obtained with filler metals containing different levels of Ag-Cu-Zn and Cd were investigated. In this study, the appropriate Ag content in brazing processes of pipes and caps used as copper-brass material pairing in cooling-heating devices in the air conditioning system was investigated in detail. When the typical microstructure of the joints was examined, it was observed that it mainly consisted of solid solutions and eutectic phases. The interfaces in the copper and brass regions were affected by both Ag content and melting temperatures. As a result of the burst test, the maximum stress value at which the brazed material pairs were damaged was found to be 345 MPa, and the damage was reported to occur in the copper pipe. In addition, it has been reported that the final product is damaged from the brazed zone when Ag-free solder wire is used. It was found that 5%Ag content provides sufficient performance in the final product due to the fact that the strength of the braze joint with low-Ag content is higher than the copper tube. The results also showed that the micro-hardness increased with the increase of Ag-addition, the hardness of the joint with the filler metal containing 5%Ag increased by 21%. The joint hardness obtained with filler metal containing 40% Ag showed an increase of up to 57%. This showed that the addition of Ag improves the strength, but its 5% Ag content provides sufficient performance in the brazing joint.
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Cherepanov, A. I., V. V. Kukartsev, A. V. Kuznetsov, E. G. Kravcova, S. G. Dokshanin, and O. S. Stephanenko. "Design of an induction brazing installation for connecting oil and gas equipment." Journal of Physics: Conference Series 2094, no. 4 (2021): 042010. http://dx.doi.org/10.1088/1742-6596/2094/4/042010.

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Abstract The article is devoted to the design of a circuit diagram of an induction heating device. The work carried out a literature review in the area under consideration. The technology of manufacturing a union is considered, which consists of manufacturing a plug, a branch pipe and a flange. Conducted research and application of induction brazing and various fields. Various elements of the equipment used in the design process are considered. A schematic flow diagram of the induction brazing unit has been developed. As a result of the work, the design of the installation for induction soldering was developed and auxiliary materials (flux, solder) were selected.
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Dissertations / Theses on the topic "Pipe brazing"

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Rocha, Kortz Alessandra. "Biodiversity change in the Cerrado following invasive pine tree establishment." Thesis, University of St Andrews, 2017. http://hdl.handle.net/10023/12220.

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How do newly established species interact with existing assemblage members to alter local biodiversity? This question is especially topical given growing concerns about increased temporal turnover levels relative to background rates. My PhD thesis concerns young, isolated pines Pinus elliottii invading the Cerrado (Brazilian savanna) as a study system to test the hypothesis that the impact of newly established individuals varies across habitat layers. I sampled both vegetation layers (shrub and grass) of two distinct habitats, the shrub-dominated campo sujo and the grass-dominated campo úmido. My results show that the pine is changing α diversity in the dominant vegetation layer of each habitat: the shrub layer of campo sujo and the grass layer of campo úmido. The shape of the diversity v. establishment time relationship is habitat dependent; there is a hump shaped relationship between diversity and pine size in the grass layer but a linear one in the shrub layer. β diversity metrics – which take species composition into account - reveal marked differences in species composition between the habitats in the shrub layer, whereas the corresponding pair of invaded and control sites of the same habitat and layer is more similar than expected (in both vegetation layers). The degree of similarity between sites also changes as the invasion proceeds. In the campo sujo habitat, sites become more compositionally distinct, whereas in the grass layer of campo úmido sites get more similar. This suggests that the timing of changes in species composition is habitat-dependent and reinforces the need to remove the invader individuals from the area. My results show that, though complex, the consequences for local biodiversity of non-native species establishment are not haphazard. As such they contribute to the understanding of species coexistence and help explain why species invasion can lead to very different biodiversity outcomes.
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Carvalho, Fernanda de. "Atributos bioquímicos como indicadores da qualidade de solo em florestas de Araucaria angustifolia (Bert.) O. Ktze. no estado de São Paulo." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-17082005-164045/.

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Araucaria angustifolia, espécie brasileira considerada a mais explorada devido à qualidade de sua madeira, encontra-se na atualidade ameaçada de extinção. Diante deste fato a preservação dos remanescentes torna-se ainda mais importante, considerando que a extinção de uma única espécie pode comprometer todo um ecossistema. O objetivo deste estudo foi verificar a utilização dos atributos bioquímicos como indicadores de qualidade do solo em seis ecossistemas de araucária. Os atributos bioquímicos considerados foram carbono e nitrogênio da biomassa microbiana, respiração basal, quociente metabólico, e atividade das enzimas &#946;-glicosidase, urease e hidrólise do diacetato de fluoresceína (FDA) Os ecossistemas avaliados foram mata com araucária (nativa, nativa com interferência antrópica e reflorestamento) em dois parques estaduais (PECJ e PETAR), localizados em duas diferentes regiões do Estado de São Paulo, Campos do Jordão e Apiaí, respectivamente. Foram selecionadas cinco árvores de araucária por ecossistema, onde, sob a copa de cada uma foram retiradas três amostras de solo na profundidade de 0-10 cm, totalizando quinze amostras por ecossistema. Foram realizadas quatro coletas em estações contrastantes, no inverno de 2002 e 2003 e no verão de 2003 e 2004. Os valores isolados de carbono e nitrogênio da biomassa microbiana, não serviram como indicadores precisos e confiáveis da qualidade do solo quanto os demais parâmetros avaliados. Os atributos bioquímicos que denotam processos edáficos dos ecossistemas (respiração basal, quociente metabólico, FDA e a atividade das enzimas urease e &#946;-glicosidase) mostraram-se mais sensíveis para captar as alterações ocorridas no ambiente, e os valores encontrados para estes atributos sugerem que os ecossistemas avaliados sejam sustentáveis, onde a cobertura vegetal e rizosfera seriam importantes para a manutenção de sua funcionalidade.<br>Brazil Pine (Araucaria angustifolia) has been the most explored Brazilian tree species due to its high quality wood and nowadays it is endangered of extinction. Therefore the preservation of the remainders becomes even more important, considering that the extinction of one species could endanger the whole ecosystem. The objective of this study was to evaluate the use of biochemichal soil attributes as soil quality indicators in six Brazil Pine ecosystems. The following biochemichal attributes were evaluated: carbon and nitrogen of the microbial biomass, soil respiration, the metabolic quotient, fluorescein diacetate (FDA) hydrolysis and the activities of &#946;-glicosidase and urease. The different Brazil Pine ecosystems that were considered, consisted of native forests, replanted areas, impacted area in the two state parks (PECJ and PETAR), located in two different regions of the State of São Paulo-Brazil, Campos do Jordão and Apiaí, respectively. Five Pine trees for each ecosystems were selected and three 0-10cm deep soil samples were collected under the crown of each tree, totalizing fifteen samples. The samplings were carried out in the winter of 2002 and 2003 and in the summer of 2003 and 2004. The carbon and nitrogen microbial biomass by themselves were less sensitive than other attributes as indicators of soil quality. Parameters related to soil processes in the ecosystems (soil respiration, metabolic quotient, FDA hydrolysis and the enzymatic activity of urease and &#946;-glicosidase were more responsive to environmental disturbance. Nevertheless, these parameters suggest that all evaluated the ecosystems are sustainable, and that the vegetation (rhizosphere) is very important for maintenance of its functionality.
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Carvalho, Rodrigo Pinto. "Análise dos instrumentos legais de proteção ambiental para exploração da silvicultura de espécies exóticas do gênero pinus e eucalyptus no Estado do Rio Grande do Sul (Brasil) e na Argentina sob a óptica do direito comparado." reponame:Repositório Institucional da UCS, 2018. https://repositorio.ucs.br/11338/3814.

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Esta dissertação enquadra-se na linha de pesquisa “Direito Ambiental, Políticas Públicas e Desenvolvimento Socioeconômico” do Programa de Pós-Graduação em Direito do Centro de Ciências Jurídicas da Universidade de Caxias do Sul, buscando analisar o fenômeno da silvicultura de espécies exóticas do gênero Pinus e Eucalytptus enquanto atividade econômica possivelmente causadora de impacto ambiental, que demanda intervenção e controle do Estado diante do poder-dever constitucional de proteger e garantir um meio ambiente sadio e equilibrado para as presentes e futuras gerações. Traça como objetivos a serem alcançados, a investigação científica acerca dos principais impactos ao meio ambiente provocados pela sua implantação em grande escala nos solos de países subtropicais, a pertinência da formulação de políticas públicas e normas ambientais que restrinjam ou imponham condicionantes à sua exploração, bem como se propôs à análise e comparação das normas constitucionais e infraconstitucionais existentes e em vigor no Estado do Rio Grande do Sul e na República Argentina, relativas a autorização ambiental de sua realização, para que, uma vez compilada a legislação existente, munir-se de subsídios para apurar se o ordenamento jurídico dos Estados objeto deste estudo promove adequadamente o desenvolvimento sustentável da atividade. A pesquisa divide-se em três capítulos – um para tratar da silvicultura, outro para abordar os instrumentos ordinários protetivos de intervenção do Estado na atividade econômica no Brasil e na Argentina e um terceiro, que aborda a análise das legislações específicas acerca da atividade nos Estados sob enfoque, de modo comparado. Utiliza o método dedutivo de abordagem, pois parte de uma análise geral do tema para uma compreensão do caso particular, e o método analítico-descritivo e qualitativo de procedimento, fazendo reflexão teórica sobre a atividade da silvicultura, do licenciamento ambiental e do estudo de impacto ambiental enquanto instrumentos de política pública ordinários voltados a proteção ambiental no Brasil e na Argentina respectivamente, bem como destes instrumentos aplicados especificamente sobre a regulação da silvicultura. Embora a principal fonte de pesquisa tenha sido a doutrina, especialmente os livros e artigos especializados no tema, recorreu-se à legislação, às declarações internacionais de direitos e a sites eletrônicos. Ao final, conclui que a silvicultura de espécies exóticas, pincipalmente de espécies invasoras – caso do Pinus – pode causar impactos socioambientais capazes de justificar a existência do licenciamento ambiental ou de instrumento análogo de controle pelas autoridades ambientais; que tanto no Rio Grande do Sul, como na Argentina, existem legislações infraconstitucionais que exigem autorização ambiental para o exercício da atividade, sendo que no primeiro, adota-se o licenciamento ambiental e estudo de impacto ambiental como instrumentos, enquanto que na Argentina, apenas há a previsão de simples apresentação do estudo de impacto ambiental. Por fim, conclui que a legislação gaúcha, apesar de ter sido flexibilizada para tornar prescindível a observância do zoneamento ambiental da atividade, bem como por ter implementado a possibilidade do licenciamento autodeclaratório, ainda apresenta maior segurança ambiental do que o frágil sistema de proteção ambiental argentino, à serviço muito mais do incentivo da exploração econômica, do que da proteção ambiental.<br>This dissertation is part of the research line "Environmental Law, Public Policies and Socioeconomic Development" of the Graduate Program in Law of the Center for Juridical Sciences of the University of Caxias do Sul, aiming to analyze the phenomenon of silviculture of exotic species of the genus Pinus and Eucalyptus as an economic activity possibly causing environmental impact, which demands intervention and control of the State in the face of the constitutional power-duty to protect and ensure a healthy and balanced environment for present and future generations. It outlines the objectives to be achieved, scientific research on the main impacts on the environment caused by their large-scale implementation in the soils of subtropical countries, the pertinence of the formulation of public policies and environmental norms that restrict or impose constraints on their exploitation, and as it was proposed to analyze and compare the existing constitutional and infra-constitutional norms in force in the State of Rio Grande do Sul and in the Argentine Republic, regarding the environmental authorization of their realization, so that once existing legislation is compiled, subsidies to determine if the legal system of the States object of this study adequately promotes the sustainable development of the activity. The research is divided into three chapters - one to deal with forestry, another to address the ordinary protective instruments of state intervention in economic activity in Brazil and Argentina, and a third that addresses the analysis of specific legislation on activity in the States under focus, compared. It uses the deductive method of approach, as part of a general analysis of the theme for an understanding of the particular case, and the analytical-descriptive and qualitative method of procedure, making theoretical reflection on the activity of forestry, environmental licensing and impact study environmental instruments as ordinary public policy aimed at environmental protection in Brazil and Argentina respectively, as well as these instruments specifically applied to the regulation of forestry. Although the main source of research has been the doctrine, especially the books and articles specializing in the subject, legislation, international declarations of rights and electronic websites have been used. At the end, it concludes that the forestry of exotic species, mainly of invasive species - Pinus case – can cause socioenvironmental impacts capable of justifying the existence of environmental licensing or an analogous instrument of control by the environmental authorities; that in both Rio Grande do Sul and Argentina there are infra-constitutional legislations that require environmental authorization for the exercise of the activity, and in the first, environmental licensing and environmental impact studies are used as instruments, while in Argentina, only there is a simple presentation of the environmental impact study. Finally, it concludes that the Rio Grande do Sul legislation, despite having been made more flexible to make compliance with the environmental zoning of the activity, as well as having implemented the possibility of self-declaration licensing, still present greater environmental security than the fragile Argentine environmental protection system, at the service much more of the incentive of the economic exploitation, than of the environmental protection.
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Books on the topic "Pipe brazing"

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Commission, United States International Trade. Certain seamless carbon and alloy standard, line, and pressure steel pipe from Argentina, Brazil, Germany, and Italy. U.S. International Trade Commission, 1994.

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United States International Trade Commission. Certain seamless carbon and alloy standard, line, and pressure steel pipe from Argentina, Brazil, Germany, and Italy. U.S. International Trade Commission, 1995.

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Commission, United States International Trade. Butt-weld pipe fittings from Brazil and Taiwan: Determinations of the Commission in investigations nos. 731-TA-308 and 310 (final) under the Tariff Act of 1930, together with the information obtained in the investigations. U.S. International Trade Commission, 1986.

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United States International Trade Commission. Butt-weld pipe fittings from Brazil, Japan, and Taiwan: Determinations of the Commission in investigations no. 731-TA-308-310 (preliminary) under the Tariff Act of 1930, together with the information obtained in the investigations. U.S. International Trade Commission, 1986.

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United States International Trade Commission. Butt-weld pipe fittings from Brazil, Japan, and Taiwan: Determinations of the Commission in investigations no. 731-TA-308-310 (preliminary) under the Tariff Act of 1930, together with the information obtained in the investigations. U.S. International Trade Commission, 1986.

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United States International Trade Commission. Butt-weld pipe fittings from Brazil and Taiwan: Determinations of the Commission in investigations nos. 731-TA-308 and 310 (final) under the Tariff Act of 1930, together with the information obtained in the investigations. U.S. International Trade Commission, 1986.

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Commission, United States International Trade. Certain cast-iron pipe fittings from Brazil: Determinations of the Commission in investigation no. 701-TA-221 (final) under the Tariff Act of 1930, together with the information obtained in the investigation. U.S. International Trade Commission, 1985.

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United States International Trade Commission. Certain cast-iron pipe fittings from Brazil: Determinations of the Commission in investigation no. 701-TA-221 (final) under the Tariff Act of 1930, together with the information obtained in the investigation. U.S. International Trade Commission, 1985.

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Commission, United States International Trade. Certain cast-iron pipe fittings from Brazil, the Republic of Korea, and Taiwan: Determinations of the Commission in investigation no. 731-TA-278 through 281 (preliminary) under the Tariff Act of 1930, together with the information obtained in the investigations. U.S. International Trade Commission, 1985.

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United States International Trade Commission. Certain cast-iron pipe fittings from Brazil, the Republic of Korea, and Taiwan: Determinations of the Commission in investigation no. 731-TA-278 through 281 (preliminary) under the Tariff Act of 1930, together with the information obtained in the investigations. U.S. International Trade Commission, 1985.

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Book chapters on the topic "Pipe brazing"

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de Barros Viana Hissa, Sarah. "Smoking Pipes and Quotidian Constellations in Brazil." In Contributions To Global Historical Archaeology. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-71257-9_4.

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Navarro, Alexandre Guida. "Pile Dwellings or Stilt Houses in Prehistory of Brazil." In Encyclopedia of Global Archaeology. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-30018-0_3202.

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Navarro, Alexandre Guida. "Pile Dwellings or Stilt Houses in Prehistory of Brazil." In Encyclopedia of Global Archaeology. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-51726-1_3202-1.

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Silva, F. J. G., V. F. C. Sousa, R. D. S. G. Campilho, A. G. Pinto, and J. Fecheira. "Optimizing the Ag Filler Metal Content on Brazing of Cu-Stainless Steel Pipes Joints for Carbon Dioxide Refrigeration Plants." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-17629-6_5.

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Lima, Tania Andrade, and Marcos André Torres de Souza. "The Clay Pipes of Valongo Wharf, Rio de Janeiro, Brazil: Building and Materializing New Communities in a New World." In Contributions To Global Historical Archaeology. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-71257-9_2.

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Franklin, Mariza, Horst Monken Fernandes, and Martinus Th van Genuchten. "Modeling the water flow in unsaturated waste rock pile: an important step in the overall closure planning of the first uranium mining site in Brazil." In Uranium, Mining and Hydrogeology. Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-87746-2_24.

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Meyer, Jimmy E. "Hydrogen Piping and Pipe Lines." In Companion Guide to the ASME Boiler & Pressure Vessel Codes, Volume 2, Sixth Edition. ASME Press, 2023. http://dx.doi.org/10.1115/1.886526_ch38.

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Abstract The ASME B31.12 Code covers piping in gaseous and liquid hydrogen service and pipelines in gaseous hydrogen service. This chapter is based on the 2014 edition of B31.12, which includes three major Parts: General Requirements (GR), Industrial Piping (IP), and Pipelines (PL). It also covers Mandatory Appendices I through XI and Nonmandatory Appendices A through F. After a brief background and coverage of the scope, intent, and organization of the Code, the chapter examines Part GR, which covers selection of materials to resist deterioration in hydrogen service. It lists the common requirements for welding, brazing, heat treating, forming and testing of welded and brazed joints, qualification of the welding and brazing procedures, and qualification of the welders and brazers to those procedures. Part GR provides information on inspection, examination, and testing along with operating and maintenance procedures that affect the safety of hydrogen transmission and distribution facilities. It also provides requirements for the development of Quality System Programs. Part IP includes requirements for materials and components, design, fabrication, assembly, erection, inspection, examination, testing, operation, and maintenance of piping, and applies to piping for liquid and gaseous hydrogen and joints connecting piping to equipment. It describes four basic methods for design of components for internal pressure and lists the dimensional standards for piping components. Part PL sets forth the requirements for materials, components, design, fabrication, assembly, erection, inspection, examination, testing, operation, and maintenance of hydrogen pipelines. History Jimmy E. Meyer revised the initial inputs of Louis E. Hayden who authored this chapter for the fourth edition. The current online edition has been reviewed by George Rawls and updated by Jimmy E. Meyer.
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Hoyer, I., and B. Wielage. "Brazing of nickel-based filler metals for pipes and other components in contact with drinking water." In Advances in Brazing. Elsevier, 2013. http://dx.doi.org/10.1533/9780857096500.3.545.

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Garfield, Seth. "Growing the Pie." In Guaraná. University of North Carolina PressChapel Hill, NC, 2022. http://dx.doi.org/10.5149/northcarolina/9781469671277.003.0008.

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Abstract This chapter links the expansion of guaraná crop production in Brazil to state-sponsored and corporate research in plant genetics and biotechnology amid the Brazilian military government’s geopolitical project for agricultural modernization and Amazon frontier development. Focused on the modernization of guaraná production—intertwined with the rise in agribusiness and rural inequality, increased soda consumption, and overnutrition-- the chapter explores transformations in agriculture and diet in Brazil symptomatic of the Green Revolution and the nutrition transition in developing countries. Institutionalized agricultural research was carried out under the military government under the auspices of the Brazilian Agricultural Research Corporation (Empresa Brasileira de Pesquisa Agropecuária- EMBRAPA). The nutrition transition in Brazil, tied to the rise of ultra-processed foods characterized by excess simple carbohydrates, such as soft drinks, and saturated fats, has been implicated in the rise of obesity and overweight and the prevalence of morbidity and mortality from chronic and degenerative diseases. The chapter underscores the agroecological change and shifting technical capacities, social roles, and ideologies that converge in the making of food systems. The boom in soda consumption in military Brazil further signaled the sweep of market-driven processes of identity formation and group belonging.
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Marchezini Silvana Fava, Pinto da Cunha Renato, Conciani Wilson, and de Figueiredo Luiz Carlos. "Comparison between dynamic and static load tests for bridge foundations." In From Fundamentals to Applications in Geotechnics. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-603-3-565.

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This paper describes the comparison of load capacities derived from static and dynamic load tests on a precast driven pile in a tropical soil of the Mid West region of Brazil. The driven pile is typical of those used in some areas of this large region for the supporting system from bridge foundations. Both tests were carried out in 2007 during a Dissertation research of the University of Bras&amp;iacute;lia. The dynamic instrumentation was obtained with the PDA (Pile Driving Analyzer) device, and analyzed with the numerical programs CASE (Case Institute of Technology) and CAPWAP (Case Pile Wave Analysis Program). The static load test was carried out after the dynamic one, in the same driven pile. The comparison of extrapolated results showed a very good agreement, encouraging the further usage of these techniques in the region.
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Conference papers on the topic "Pipe brazing"

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Steiner, Kimberly. "Acid-Induced Corrosion of Hospital Facilities from Construction Processes." In CONFERENCE 2023. AMPP, 2023. https://doi.org/10.5006/c2023-19062.

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Abstract A room in a medical facility experienced corrosion of installed finishes and a multi-million-dollar piece of equipment during construction. A PVC pipe was cast into the concrete floor slab to provide a conduit for later-installed copper gas tubing. Prior to installing the copper tube, the interior finishes, including stainless steel cabinets, galvanized steel electrical boxes, leaded glass windows, and medical equipment were installed in the room. Subsequently, copper gas pipe connections were brazed where they penetrated the concrete slab, at the location of the PVC pipe. Incidental heating of the adjacent PVC pipe led to the production of hydrogen chloride, and deposition of a film of hydrochloric acid on the surfaces within the room. This case study describes the corrosion of the materials within the room related to off-gassing of hydrochloric acid from excessive heating of the PVC pipe during brazing of the copper. Studies involved on-site evaluation and microscopy, laboratory evaluation of deposits using x-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy with energy dispersive x-ray spectroscopy.
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Bandeira, Merlin C. E., André F. V. A. Beserra, Sérgio G. Tavares, et al. "Adaptation of NACE Standard TM 0177 C-Ring Test for Flexible Pipes Carcass." In CORROSION 2013. NACE International, 2013. https://doi.org/10.5006/c2013-02680.

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Abstract This work proposes a method to test flexible pipe carcass samples by Sulfide Stress Cracking (SSC) C-Ring test. As flexible pipes are going to be used on the majority of new deep water oil &amp; gas offshore fields and at most of pre-salt fields in Brazil where the conditions are sour or can eventually became sour due to H2S presence, SSC may occur. Therefore, a method to test SSC on samples made from flexible pipes is very important. In this context, the NACE Standard TM 01771, method C (C-Ring) test is presented as a good alternative to evaluate these components. However, the method as it is described in the standard does not contemplate the carcass geometry. The experimental procedure presented herein follows the standard NACE TM 0177 and proposes, in addition, a finite element simulation to find the main direction of applied stresses and also the use of a rosette strain gauge instead of the uniaxial one recommended in the standard. Reproducible results were obtained on loads performed following the procedure presented in this paper.
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Bandeira, Merlin C. E., Rogaciano M. Moreira, Bryan de Barros, et al. "The Effect of H2S Consumption on SSC Susceptibility of High Strength Wire Grades for Flexible Pipes." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-13483.

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Abstract Flexible pipes are widely used in offshore installations, especially in Brazil to produce and export oil and gas. In order to guarantee safety operation in pre-salt, layer that occurs at a depth of 5 to 7 km and under a layer of salt up to 2 km thick, without overestimating the field corrosiveness, many efforts are dedicated to study the actual H2S concentration in the pipe annulus. The data presented in the literature points to considerably lower H2S concentrations than those predicted based on traditional annulus permeation models. The consequences of these studies have direct impact on flexible pipe design, suggesting the possibility to use lighter, lower cost pipes with good performance structures. However, to correctly specify the armor wires it is crucial to evaluate the corrosion resistance on annulus condition, especially the stress corrosion cracking. The present study goal is divided in three parts: 1 - to compare experimental data with simulated data obtained by a commercial software to estimate pH and the concentration of H2S dissolved in different flow conditions (mL of H2S/min) ; 2 - to evaluate the H2S consumption due to the confinement condition considering different flows and 3 – to evaluate the Sulfide Stress Cracking (SSC) by 4 points bend test of high resistance wires exposed to confinement conditions by using an experimental setup that despite the fully packed test vessel guarantees the fluid homogeneity throughout the test. All experiments were carried out at 30 °C, 0.1 MPa using a gas mixture with 1% H2S in CO2. The ratio of liquid phase/steel surface area (0.7 mL/cm2) was also controlled. The lowest flow rate studied was 10-6 mL/min/cm2. For the three flow conditions studied, without confinement, the saturation concentration of H2S in solution was approximately 24 ppm but less than 1 ppm was found with confinement. The pH also changed from 4.9 to 5.6 and 6.1, to experiments without and with confinement, respectively. After three months test no HIC or SSC evidences were found on wire samples tested under confinement conditions equivalent to 10-6 mL of H2S/min/cm2.
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Gervasio, João P. K. "Bonding Parallel Pipelines with Different Types of Coating to Improve Cathodic Protection Systems and Avoid Interferences and Shielding: the Brazilian Approach." In LatinCORR 2023. AMPP, 2023. https://doi.org/10.5006/lac23-20587.

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Extended Abstract From early 2000s, new coatings, with almost 100% efficiency, began to be applied on new onshore pipelines. In special, the three-layer polyethylene (3LPE). Cathodic protection (CP) designs had to be adapted, due to the significant drop in current demand required. On the other hand, inconveniences have arisen, such as the increase in electrical interference. In addition, ISO 15589-1 [1] sustains that bonding parallel pipelines with different coatings is unlikely to be successful and that independent CP systems may be required. Opposing to this premise, since the beginning of the use of 3LPE, pipes with different coatings have been bonded in Brazil with very positive results. This work details with examples how this Brazilian approach does not put the structures in risk, on the contrary, it helps to reduce the level of interference in new pipelines and does not hinder the execution of specialized inspection techniques.
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Ball, M. J. "Evaluation of a Novel Coating for High Temperature Service." In CORROSION 2004. NACE International, 2004. https://doi.org/10.5006/c2004-04030.

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Abstract Ultra deep drilling for oil means very hot oil and gas in subsea pipes (up to 160°C or 320°F, e.g. off Brazil). This is beyond the performance limit of currently used protective coating systems, e.g. 3-layer Polypropylene or Fusion Bonded Epoxy. Major oil producers in the North Sea, Europe require a coating system to protect equipment such as oil/water Separator tanks and Christmas trees from corrosion at high temperature and pressures (up to 130°C and 30 bars). The coating must be sprayable by conventional equipment, will cold cure sufficiently to survive handling and transport and can be made to perform over a wide temperature range in hot seawater/oil mixtures. The ability to withstand explosive decompression failure is also required. A two-pack, multi-functional liquid epoxy coating, modified by the inclusion of glass flakes has been developed. This paper will discuss and present results of new test methods on this coating at higher temperatures and pressures using autoclaves.
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McCracken, Steven L., and Nick Mohr. "Code Case N-822 for Pin Brazing Non-Structural Attachment Tabs for Buried Pipe Cathodic Protection." In ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84897.

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Cathodic protection (CP) is one of the primary methods to protect buried piping and pressure components from corrosion and is a critical element in asset management of buried piping at nuclear power plants. Implementation of cathodic protection requires non-structural attachments to the buried piping for electrical leads and connections. The method of attaching copper-copper alloy CP leads to carbon steel piping and components using traditional arc welding processes can be difficult and time consuming. A two-step process is frequently used where a carbon steel weld tab is first welded to the pipe or component by a traditional arc welding process. The copper-copper alloy CP lead is then joined to the carbon steel weld tab by the exothermic welding process. An alternative to this cumbersome two-step process is pin brazing which is an automatic brazing process that uses electric current resistance to heat the interface between a pin capsule and the component. An arc between the pin capsule and the outside surface of the electrical connector is then used to melt the capsule or pin that contains the brazing filler metal. The process is similar to stud welding in that the brazing pin is loaded into an automatic pistol and the brazement is made when the trigger is pulled. ASME Section XI Code Case N-882 delineates rules and requirements for application of pin brazing on Class 2 and 3 pressure boundary components. This paper provides the background and description of the pin brazing process with a summary of the technical basis for Case N-882.
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Bach, Fr W., K. Möhwald, C. Bach, and U. Holländer. "Thermally Sprayed Filler Metal Coatings for High Temperature Brazing." In ITSC2004, edited by Basil R. Marple and Christian Moreau. ASM International, 2004. http://dx.doi.org/10.31399/asm.cp.itsc2004p0015.

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Abstract The use of modern thermal spraying techniques for filler metal application may offer new solutions for brazing complex metal components without fluxing agents, when the spraying processes are fitted to the requirements of the following brazing process. The necessary coating parameters always depend on the kind of base material, the geometry of the joint, the used filler metal, and the chosen heating process for brazing (heating in vacuum or protective atmosphere furnaces, inductive or flame heating etc.). Copper and nickel based alloys are typical filler metals for brazing complex components made of stainless steel (heat exchanger, fuel pipe systems, exhaust systems, catalytic devices etc.). Using these examples, the results of brazing experiments and technical aspects of thermally sprayed braze coatings compared with conventional filler metal application techniques are discussed.
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Meisel, Peter, Wolfgang Lippmann, and Antonio Hurtado. "Ceramic High-Temperature Heat-Pipes." In 2014 22nd International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icone22-30802.

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Ceramic heat pipes and heat pipe based heat exchangers are tailored for automatically heat removal and heat distribution in thermally, chemically and abrasive high stressed systems. The manufacture of silicon carbide heat pipes was carried out. These were filled with sodium or zinc and sealed by laser brazing using metallic and glassy solder materials. High-temperature performance tests revealed a stable operating regime for both ceramic heat pipes with sodium and zinc as working fluid, respectively. Specifically the heat transferred by a zinc filled heat pipe of 22 mm in diameter and 750 mm in length accounted for 600 W at a temperature difference of 400 K. Notably the internal heat transfer capacity of the working fluid was even higher however, the total heat transfer was limited by the external active heat transfer area of the heat pipe. In order to evaluate the long-term stability of the heat pipes, particularly with respect to the joining seam, manufactured heat pipes are currently being tested in long-term annealing experiments at a temperature of 1000 °C under a variety of corrosive atmospheres.
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Sheets, Colton, Taylor Shie, and Adam Crawford. "Thin-Wall Pipeline Repair: Evaluation of Reinforcement Systems and Internal Temperature Monitoring During Maintenance Procedures." In 2018 12th International Pipeline Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/ipc2018-78647.

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There are many options available to pipeline operators when addressing anomalies or integrity threats. Repairing integrity threats requires an understanding of both the anomaly to be repaired, and the repair system itself. This can be challenging as pipeline repair systems come in a wide variety of materials, application techniques, and designs. Operators have similar challenges when performing maintenance activities on operating pipelines. Maintenance activities can take many different forms and often involve welding or other high temperature processes on the outside pipe surface. These processes can result in elevated temperatures on the inside surface of the pipeline and must be seriously considered before undertaking to ensure the safety of personnel performing the tasks and to protect the integrity of the pipeline. This study aimed to provide a greater understanding of pipeline reinforcement systems and maintenance activities as they relate specifically to thin-walled pipelines. To evaluate systems reinforcing thin-wall pipes, five different repair systems were investigated using 12.75-inch × 0.219-inch, Gr. X65 pipe that had been removed from service. The systems included a Type B steel sleeve, an epoxy-filled, interference fit, Type A steel sleeve, a hybrid steel sleeve-fiberglass based composite repair system, epoxy-filled oversized Type A steel sleeves, and a rigid coil, pre-cured, fiberglass-based composite repair system. Each system was used to reinforce a simulated 50% wall loss anomaly and was installed with the pipe samples maintained at an internal pressure equal to 33% of the pipe’s specified minimum yield strength (SMYS). The samples underwent pressure cycling and hydrostatic testing while strains in the simulated wall loss region were continually monitored. As a final step, the samples were burst tested. Monitoring of strain gages installed in the simulated wall loss anomaly allowed for comparisons to be made between the tested repair systems. It was observed that the recorded strain magnitudes and strain ranges were higher in some samples than others during testing. This allowed the systems to be ranked according to the recorded strains. Although differences were observed in the recorded strains, burst testing showed that all reinforcement systems were able to force failure to the base pipe outside of the simulated wall loss region. Maintenance procedures were also evaluated to identify those that could produce unacceptable temperatures on the inside surface of the thin-wall pipe. The maintenance procedures included installation of Type A steel sleeves (non-pressure containing), Type B steel sleeves (pressure containing), cad welds, and pin brazing cathodic protection (CP) test leads. Temperatures were monitored on the internal pipe surface using thermocouples and an infrared (IR) camera while the maintenance procedures were being performed. An internal surface temperature of 500 °F (260 °C) was set as the threshold for suitability. Monitoring of the Type B steel sleeve installation showed temperatures on the inside surface of the pipe that exceeded 1,200 °F (648 °C) when performing the circumferential weld at each end of the steel sleeve. A maximum temperature of 280 °F (137 °C) was recorded when making the longitudinal welds that included a backing strip. For the application being considered, this indicated that Type A steel sleeves (longitudinal welds only) could be installed within the required temperature limits. A maximum internal temperature of 936 °F (502 °C) was recorded during cad-welding. Pin-brazing was slightly lower, but also exceeded the 500 °F threshold. This testing confirmed that the installation of Type B steel sleeves, cad welding, or pin brazing should receive scrutiny before being performed on operating thin-wall pipelines.
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Tian, Bohan, Hongbin Ma, Yang Deming, Jiujun Xu, Zhiyong Wang, and Nannan Zhao. "A Novel Thermal Solution for Electronics: Alumina Flat-Plate Oscillating Heat Pipe." In ASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/mnhmt2019-3936.

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Abstract The heat flux in electronics requires the thermal management of printed circuit boards (PCBs) using two-phase cooling methods. In this study, an integrated ceramic heat transfer device, the alumina flat-plate oscillating heat pipe, is developed. The device was fabricated by pressing and sintering procedures, and the inner serpentine channels were simultaneously formed during sintering without brazing or separated caps. This novel manufacturing process simplifies the fabrication of the macrochannels inside ceramic devices and provides a new method for fabricating ceramic two-phase cooling devices. This paper presents an analysis of the internal channel’s formation mechanism and illustrates the major factors of densification. Micro-computed tomography (Micro-CT) scanning was adopted to assess the macrostructure, and SEM was used to characterize the microstructure of the alumina OHP. Water was charged inside the device as the working fluid. The effects of the power input, orientation, operating temperature and filling ratio on the heat transfer performance were investigated. The experimental results show that the alumina OHP has a high heat transport capability. When the OHP structure is embedded inside the alumina and charged with water, the thermal resistance can be reduced by 97%.
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Reports on the topic "Pipe brazing"

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Gamper-Rabindran, Shanti, Shakeeb Khan, and Christopher Timmins. The Impact of Piped Water Provision on Infant Mortality in Brazil: A Quantile Panel Data Approach. National Bureau of Economic Research, 2008. http://dx.doi.org/10.3386/w14365.

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Tojal Ramos Dos Santos, Carolina, and Bruna Morais Guidetti. Expansion of Piped Water and Sewer Networks: The Effects of Regulation. Preliminary Findings. Inter-American Development Bank, 2024. http://dx.doi.org/10.18235/0013106.

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Expansion of piped water and sewage collection is a critical issue in developing countries, where public investment is limited. In Brazil, the New Sanitation Regulatory Framework from 2020 intends to stimulate the entry of private providers into the market while setting connection targets: 99% of households with piped water and 90%with piped sewer. We assess the viability of these connection goals under the current regulated prices and compare the distributional impacts of supplemental policies. We use billing data from a major private provider and a structural model encompassing the expansion decisions of the service provider and the connection and consumption choices of consumers. We find that even if the firm expanded water and sewer everywhere, the targets would not be met, with only 43% connecting to piped sewage. Moreover, the expansion is not profitable for the firm. We then simulate charging consumers when piped sewage is available, regardless of connection, and price discounts on the sewer bills. Combinations of these two policies stimulate the firm to expand and consumers to connect, achieving 76% connected to sewer but reducing consumer surplus.
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