Welded Pipes
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. 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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2. 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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3. Residual Stress, Microstructure and Hardness of Thin-Walled Low-Carbon Steel Pipes Welded Manually
The aim of this work is to evaluate the welding residual stress profile in ASTM A106 Gr. B steel pipes with 4" diameter and to correlate this profile with the microstructure and hardness of the joint. The results showed that the residual stresses are more uniform for a lower welding heat input. Higher welding heat input causes not only a non-uniformity of th
Mat. Res.. Publicado em: 29/09/2016
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4. Microstructural behavior of SAF 2205 Duplex Stainless Steel Welded by Friction Hydro Pillar Processing
Abstract The Friction Hydro-Pillar Process (FHPP) is an innovative process that has been recently studied regarding its possible in situ repair applications. There is still no literature about usage of the FHPP on duplex stainless steel (DSS) base materials to smaller forces than 25 kN. The investigation on DSS processing is crucial due his wide variety of c
Mat. Res.. Publicado em: 18/07/2016
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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. 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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7. Analysis of the corrosion scales formed on API 5L X70 and X80 steel pipe in the presence of CO2
Longitudinal welded joints samples of X70 and X80 API grade steel pipes were exposed to a deaerated 1% NaCl solution containing CO2, at temperatures in the range of 25 ºC to 80 ºC for 48 hours. Analogous samples were exposed to the adjacent vapour phase. The layer of corrosion products which formed on the base metal and welded regions of the samples was in
Mat. Res.. Publicado em: 08/11/2013
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8. Estudio comparativo de la productividad y calidad obtenidas en la soldadura de tubos de calidad T9 empleados en el sector petroquímico, mediante los procesos TIG, HW-TIG y PAW
Traditionally, the manufacture of welded Cr-Mo steel pipes used in furnace coils for petrochemical industry has been carried out on a massive scale by low productivity processes, mainly TIG for root pass and SMAW for layers of filling run, both of them manuals. This study presents the results of a research, conducted by AIMEN Technology Centre, related to th
Soldag. insp.. Publicado em: 2012-09
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9. AnÃlise de TensÃes Residuais em TubulaÃÃes Soldadas / Residual Stress Analysis in Welded Pipes
No atual campo industrial do paÃs, tem-se procurado, de forma freqÃente e contÃnua, a qualidade, a economia e a seguranÃa nos processos produtivos. Uma forma de conseguir isso à evitando falhas de equipamentos e componentes. TensÃes que permanecem num material, apÃs ter cessado o esforÃo externo que lhe deu origem, sÃo denominadas tensÃes residuais
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2007
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10. 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
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11. Study of cutting forces in the edge milling process of sheets used on welded pipes manufacturing. / Estudo das forças de corte no processo de fresamento de bordas de chapas utilizadas para a fabricação de tubos de aço com costura.
O propósito deste trabalho é estudar as forças de corte envolvidas no processo de fresamento de bordas de chapas utilizadas para a fabricação de tubos de aço com costura e como estas variam em função dos parâmetros de corte utilizados. O objetivo é correlacionar estas forças à qualidade do acabamento superficial das bordas usinadas, uma vez que e
Publicado em: 2007
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12. STRUCTURAL ASSESSMENT OF PIPELINES WITH BLUNT CORROSION DEFECTS COINCIDENT WITH LONG-SEAM WELDS / AVALIAÇÃO ESTRUTURAL DE DUTOS COM DEFEITOS DE CORROSÃO COINCIDENTES COM A SOLDA LONGITUDINAL
One of the most important issues that affects pipeline integrity is corrosion-caused metal loss. This type of defect can occur over the pipe body, seam or girth welds or even on heat affected zones. Pipeline remaining strength criterions are restricted or even prohibited for assessing corrosion defects coincident with weld regions. This present work investig
Publicado em: 2007