http://www.thefabricator.com/RepairFieldWelding/RepairFieldWelding_TechCell.cfm The Repair and Field Welding tech cell is packed with specific links to help you find product information, suppliers, technical articles, case studies, seminars and conferences, as well as books, software, and videos on metal fabricating-related topics. en-us http://www.thefabricator.com/RSS/images/thefabricator_rss.gif http://www.thefabricator.com Copyright 2007 FMA Communications, Inc. All rights reserved. official publication date Tue, 21 Aug 2007 11:18:36 AM CDT Vicki Bell Laurie Harshbarger http://www.thefabricator.com/RepairFieldWelding/RepairFieldWelding_Article.cfm?ID=1569 Figure 1 Brazing takes place above 840 degrees F but below the melting point of the base metal. Source: CDA, Copper Tube Handbook. Four processes to consider when joining copper and copper alloys are mechanical couplings, welding, soldering, and brazing. Brazing is suitable for small parts and when high joint strength is required. According to the American Welding Society (AWS), the strength of a brazed joint can meet or exceed that of the metals being joined. It is importa... Myron T. Havis Tue, 13 Mar 2007 12:00:00 AM CST http://www.thefabricator.com/RepairFieldWelding/RepairFieldWelding_Article.cfm?ID=1004 Failure Analysis Almost anything can fracture. The science investigating the origins of fractures is called failure analysis, and it is used to establish responsibilities for fractures and to determine preventive measures for avoiding future occurrences. An introductory, interesting book on this subject was written by Donald J. Wulpi and is titled Understanding How Components Fail. 1 Service Failures This article discusses only in-service weldment breakage, also described as servic... Elia Levi, Contributing Writer Tue, 09 Nov 2004 12:00:00 AM CST http://www.thefabricator.com/RepairFieldWelding/RepairFieldWelding_Article.cfm?ID=931 Pilots refer to flying experience as “seat time.” For the 300-plus certified welders in Delta Air Lines’ TechOps division, the term has a similar meaning. Certification is just the first step for them. Qualified GTAW welders here log plenty of seat time. Whether they maintain ground support equipment like deicing trucks and luggage carts or critical aircraft components like engine gearboxes or cylinder sleeves, these welders know that lives depend on their ex... Jody Collier and Brent Williams, Contributing Writers Tue, 13 Jul 2004 12:00:00 AM CDT http://www.thefabricator.com/RepairFieldWelding/RepairFieldWelding_Article.cfm?ID=809 Like my history of welding article, this article is my small insight into the future of structural welding. Like I said before, if you are a history or English professor—and I’ll add math professor to this group after my last miscalculation, pointed out by Ted Neff from Reynolds Engineering & Equipment. Inc.—you might want to stop reading at this point; again, it may not be pretty. I’ve written in the past about how welding hasn’t changed in 50 years... Marty Rice, Contributing Writer Tue, 13 Jan 2004 12:00:00 AM CST http://www.thefabricator.com/RepairFieldWelding/RepairFieldWelding_Article.cfm?ID=514 Any structural welder will tell you that it's a nuisance to fix someone else's repair work error, but mistakes happen--at the drawing board, in the fabrication shop, and in the field. This becomes an even more significant challenge for several reasons when the repair must be completed in the field. First, all of the desired tools may not be as readily available as they would be in the shop. Second, when problems are discovered in the field, less schedule flexibility exists compare... Marty Rice, Contributing Writer Wed, 30 May 2001 12:00:00 AM CDT http://www.thefabricator.com/RepairFieldWelding/RepairFieldWelding_Article.cfm?ID=372 In a variety of structural situations, an engineer may need to assess the strength of a connection made with welds and mechanical fasteners. Today mechanical fasteners typically are bolts, but older structures may include rivets. Such situations may occur during retrofit, repair, or strengthening projects. For new construction, bolts and welds may be required to work together in connections in which the materials being joined first are secured with bolts and then are welded to obtain full con... Duane K. Miller, Sc.D., P.E., Contributing Writer Thu, 13 Jun 2002 12:00:00 AM CDT http://www.thefabricator.com/RepairFieldWelding/RepairFieldWelding_Article.cfm?ID=302 Brazing is a versatile process used in many industries to join materials permanently. Repair brazing is an essential part of the industry and usually is done for one of two reasons—to braze repair parts in-house before they are released to customers and to perform repairs on brazed components that have worn out in service. The former involves in-house quality assurance programs designed to detect braze defects before they get out the door. The latter involves brazed components worn ... W. Daniel Kay, Contributing Writer Fri, 26 Jul 2002 12:00:00 AM CDT http://www.thefabricator.com/RepairFieldWelding/RepairFieldWelding_Article.cfm?ID=222 Author's Note: This article originated as a conversation in which I explained why I should not present a paper on refinery welding—that the problems are mostly mundane, and that high-tech solutions are only rarely if ever sought or needed. Solving problems mostly comes down to common sense and good communication. I can only assume that it struck a chord, because a few days later I was nominated to present a paper entitled "Refinery Welding as a Way to Get out of the Place Between a... Roger Griffiths, Contributing Writer Thu, 27 Feb 2003 12:00:00 AM CST