Pipe Welding
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Characterization of Austenite Decomposition in Steels with Different Chemical Concepts and High Potential to Manufacture Seamed Pipes for Oil and Gas Industry
This work presents the characterization of austenite decomposition kinetics in two steels during continuous cooling considering non-deformed austenite grains. Two different chemical concepts of steels were evaluated: low carbon - high manganese and a relatively new concept based on low carbon - low manganese - high niobium contents. Dilatometric experiments,
Mat. Res.. Publicado em: 21/10/2019
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2. Keyhole GTAW with Dynamic Wire Feeding Applied to Orbital Welding of 304L SS Pipes
Resumo Atualmente, no cenário brasileiro de óleo e gás a execução dos processos de soldagem para aços inoxidáveis consiste em sua grande maioria de aplicações manuais, dificultando qualquer aumento de produtividade e repetibilidade dos processos. Portanto, a automação desta etapa permite grandes avanços com resultados mais confiáveis, menores c
Soldag. insp.. Publicado em: 15/08/2019
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3. Caracterización de soldaduras cuproaluminotérmica en cañerías de conducción para la protección catódica
ABSTRACT Copper-Aluminothermic weld is a process in which welder is generated by thermofusion. The necessary heat is obtained by the aluminum reducing effect above copper oxide, creating a high temperature exothermic reaction, in which melt and overheated copper is the filler material [1].This technique is used to joint rails in railway industry, in groundin
Matéria (Rio J.). Publicado em: 19/07/2018
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4. Efecto de la Composición Química del Metal de Aporte y del Calor Aportado Sobre la Microestructura y las Propiedades Mecánicas de Juntas Soldadas de Aceros Inoxidables Dúplex
Abstract Duplex stainless steels are characterized by good weldability and mechanical properties; they also present a high resistance to general and localized corrosion. They are the main materials when welding pipes with high requirements in different industries, mainly oil and gas. These steels have a microstructure consisting of two phases: 50% austenite
Soldag. insp.. Publicado em: 2017-06
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5. Optimización de los Parámetros de Soldadura por Arco Sumergido en Acero HSLA: una Aplicación para Manufactura de Tuberías de Conducción de Hidrocarburos
Abstract The HSLA steel API 5L X70 is used to manufacture pipes for transporting hydrocarbons. The construction of pipe of this material involves high amount of welding, where the parameters used affect directly in the metallurgical structure and in the mechanical properties thereof when welded. Thus, to study the impact of the parameters of the submerged ar
Soldag. insp.. Publicado em: 2015-12
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6. Influence of Heat Treatment in Residual Stresses Generated in P91 Steel-pipe Weld
The knowledge of residual stress arising from the welding processes is extremely important because the mechanical properties of the welded components are not only determined by the microstructures present in the joint, but also by the heterogeneous residual stresses introduced during the thermal cycle in welding processes. The aim of this work is the charact
Mat. Res.. Publicado em: 2015-06
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7. Effect of Post Weld Heat Treatment Process on Microstructure and Mechanical Properties of Friction Welded Dissimilar Drill Pipe
In this study, N80-42CrMo4 dissimilar drill pipes were welded by a roto-friction welding machine. A set of welded samples were tested as-welded condition. Another set of welded samples were post weld heat treated (stress relief annealing) at the temperature of 600 °C, for 20 min. and then tested. The microstructures of the as-welded and stress relief anneal
Mat. Res.. Publicado em: 2015-06
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8. Aplicação de processos MAG curto-circuito convencional e controlado na soldagem de dutos de aço carbono / Application of MAG processes with short-circuit transfer in conventional and controlled modes for carbon-steel pipe welding
A procura por processos de soldagem versáteis e de alta-produtividade é uma necessidade contínua, em especial na união de dutos que representam o cerne do escoamento dos mais diferentes fluidos. Assim, a pesquisa na soldagem de tubulações utilizando processos MIG/MAG com transferência por curto-circuito controlada tem-se tornado uma tendência na busc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/03/2011
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9. Estudo da soldabilidade do tubo API 5L X80 utilizando os processos de soldagem: MAG com transferência controlada e eletrodo tubular. / Study of the weldability of API 5L X80 pipe using the gmaw-stt and fcaw welding process.
Os tubos API 5L X80, construídos com aços alta resistência e baixa liga, são especificados para a construção de dutos para transporte de petróleo e derivados sob alta pressão, com conseqüente redução no peso dos tubos. O processo mais empregado para a soldagem circunferencial de tubos em campo no Brasil é o processo com eletrodo revestido, tanto
Publicado em: 2010
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10. Energía calorífica necesaria, durante la soldadura en servicio de tuberías para el transporte de petróleo
The thermal behavior during in service repair welding of oil transportation pipes was studied by finite element analysis in the present paper. Regression equations that relate peak temperature at the inner surface of the pipe and cooling time between 800 and 500ºC in the heat affected zone to the welding heat input, preheat temperature, and convection heat
Soldagem & Inspeção. Publicado em: 2009-03
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11. EVALUATION OF THE MICROSTRUCTURAL AND MECHANICAL PROPERTIES OF THE GIRTH WELDING OF AN API 5L X80 STEEL TUBE BY SEMI-AUTOMATIC WELDING PROCESSES WITH GAS SHIELDING / AVALIAÇÃO DA MICROESTRUTURA E PROPRIEDADES MECÂNICAS DA SOLDAGEM CIRCUNFERENCIAL DO AÇO API 5L X80 POR PROCESSOS DE SOLDAGEM SEMI-AUTOMÁTICOS COM PROTEÇÃO GASOSA
The present work evaluates the changes in the microstructural and mechanical properties of an API 5L X80 steel tube due to the influence of heat input exerted during a welding procedure that used two sequential welding processes. The tubes were manufactured using the UOE process, from steel that was produced by controlled rolling without accelerated cooling.
Publicado em: 2007
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12. Welding Residual Stress Evaluation of Small Size Pipes Used in Petroleum Refinering / AVALIAÃÃO DAS TENSÃES RESIDUAIS DE SOLDAGEM EM TUBULAÃÃES DE PEQUENO DIÃMETRO USADAS EM REFINARIA DE PETRÃLEO
The aim of this work was to evaluate the behavior of welding residual stress in small size pipes of ASTM A106 Gr. B steel, welded by manual and automatic GTAW processes. It was also evaluated the effect of the welding heat input on residual stress profile, as well as to correlate the results with microstructure and hardness. The residual stress measurement w
Publicado em: 2007