 JUNE,
2005 FEATURES Tube Welding Using the Pressure Balancing Technique At Dunfermline, FMC is engaged in the fabrication of subsea well head control systems, known as "Christmas Trees," which operate remotely in offshore environments around the world. A critical issue to FMC's fabrication process is the installation of hydraulic control lines on the "Tree," which is fundamental to the equipment operation, subsea — Fig. 1. IFP Fluid Systems was the chosen subcontractor employed by FMC to carry out the pipework installation for its subsea systems, and it is constantly evolving its processes to improve control and efficiency to deliver a fast turnaround, zero defect production. IFP has selected and employed the latest technology in orbital welding control to deliver a simplified, integrated welding and control system from Orbitec Limited. The most recent project for a large West African subsea contract was the first to be completed using the new Orbitec PPA system, where an average of 110 welds on each tree was controlled through stringent production and inspection procedures. A. Brunning Orbital Welding for Brazilian Space Applications Through the years, technological inventions originating from space activities have made remarkable contributions to the development of various industrial sectors, for example, the mechanical manufacturing area. In this area, welding technology is one of the most prominent, due to the increasing demand for high-quality welded structures for materials with special manufacturing requirements. These demands have prompted development of a new generation of programmable power supplies. In parallel, the development of special orbital weld heads has permitted use of this kind of technology to automate gas tungsten arc welding (GTAW) of tubes, fittings, and other components of various diameters. The technology has been applied in such diverse areas as the aerospace, nuclear power, food, and pharmaceutical industries. New techniques such as the use of pulsed current synchronized to the welding wire unit and to the travel speed, both of which are pulsed, permit the execution of welds in any position. J. Orlowski et al. Cold Metal Transfer Has a Future Joining Steel to Aluminum Joining aluminum with steel can improve the characteristics of components used in industrial applications. Especially in the automotive industry, joining of these two metals minimizes energy consumption through a reduction in weight. Until recently,
mechanical
joining of these two metals — clinching, screwing, etc. — was mostly
used to attach or band them. Thermal joining has been strongly
restricted due to the formation of the intermetallic phase. These
phases are very brittle and, therefore, deteriorate the mechanical
properties of such joints. The ABCs of Cup
Walking To control this problem,
a
sulfate-removal plant (SRP) was needed to treat the seawater prior to
injection into the reservoir. The SRP consists of modular units with a
total weight of 228 tons. According to Professor Kenneth Kuk, who has been teaching at Ferris for 21 years, thousands of Associate in Applied Science (A.A.S.) degrees in Welding Technology (WELT) have been awarded by Ferris since the program started in 1972, and more than 300 Bachelor of Science (B.S.) degrees in Welding Engineering Technology (WELE) have been awarded since that program started in 1984. "Over the last 20 years, about 50% of them work in the automotive industry," Kuk said of Ferris welding graduates. Ferris has a 2 +
2 program. In the first two
years, students are in the Welding Technology program to earn an A.A.S.
degree. WELDING RESEARCH SUPPLEMENT *Chemical Analysis of
Welding Fume Particles (.pdf) A means of determining tungsten electrode service life under hyperbaric conditions is presented H. Ozden and K. T. Gursel |
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Welding Journal (ISSN 0043-2296) is published monthly by the American Welding Society for $90.00 per year in the United States and possessions, $130 per year in foreign countries: $6.00 per single issue for AWS members and $8.00 per single issue for nonmembers. American Welding Society is located at 550 NW LeJeune Rd., Miami, FL 33126-5671; telephone (305) 443-9353. Periodicals postage paid in Miami, Fla., and additional mailing offices. POSTMASTER: Send address changes to Welding Journal, 550 NW LeJeune Rd., Miami, FL 33126-5671. Readers of Welding Journal may make copies of articles for personal, archival, educational or research purposes, and which are not for sale or resale. Permission is granted to quote from articles, provided customary acknowledgment of authors and sources is made. Starred (*) items excluded from copyright. |
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