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PUBLISHED BY THE AMERICAN WELDING SOCIETY TO ADVANCE THE SCIENCE, TECHNOLOGY, AND APPLICATION OF WELDING AND ALLIED JOINING AND CUTTING PROCESSES WORLDWIDE, INCLUDING BRAZING, SOLDERING, AND THERMAL SPRAYING

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PUBLISHED BY THE AMERICAN WELDING SOCIETY TO ADVANCE THE SCIENCE, TECHNOLOGY, AND APPLICATION OF WELDING AND ALLIED JOINING AND CUTTING PROCESSES WORLDWIDE, INCLUDING BRAZING, SOLDERING, AND THERMAL SPRAYING
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  PUBLISHED BY THE AMERICAN WELDING SOCIETY TO ADVANCE THE SCIENCE, TECHNOLOGY, AND APPLICATION OF WELDINGAND ALLIED JOINING AND CUTTING PROCESSES WORLDWIDE, INCLUDING BRAZING, SOLDERING, AND THERMAL SPRAYING June 2013    ...Select-Arc. Setting the Gold Standard in Nickel Alloy Electrodes…   ...Sele Select-Arc, Inc. has intremium class of SelectAlloy  elect-Arc. c, Inc. has introduced aemium class of SelectAlloyplants, piping systems, furequipment and petrpower generation plants. plants, piping systems, furnaceequipment and petrochemical and power generation plants. such as heat exchangers, and inoshore and marine applications. Whatever your demanding application, such as heat exchangers, and ine and marine applications. Whatever your demanding application, premium class of SelectAlloynickel-based, all position, flux corelectrodes developed for a wide rangeof critical welding applications. Theseoutstanding nickel alloy wirexcellent mechanical prbroad range of temperaturexceptional corrdeliver significantly higher out-of-position deposition rates than stickelectrodes or solid wir emium class of SelectAlloynickel-based, all position, flux coredodes developed for a wide rangeof critical welding applications. Theseoutstanding nickel alloy wires provideexcellent mechanical properties over aoad range of temperatures, featureexceptional corrosion resistance anddeliver significantly higher out-of-position deposition rates than stickodes or solid wires. They include:  SelectAlloy C276-AP exceptional rcorrwelding performance in pipelines, pressurprocessing plants, of facilities and marine envir  SelectAlloy 622-AP designed marine envir  SelectAlloy C276-AP  – deliversexceptional resistance to crevice corrosion and pitting for outstanding welding performance in pipelines, essure vessels, chemical   cessing plants, offshore and gas facilities and marine environments. SelectAlloy 622-AP  – speciallydesigned for welding in offshore and marine environments, chemical and osion and pitting for outstanding and onments, chemical and Whatever your demanding application,Select-Arc oers just the riSelectAlloy nickel alloy electrmeet your exacting requirements. So discover for yourself why SelectAlloynickel alloy electrodes from Select-Arthe standard for welding excellence. Callus today at 1-800-341-5215 website at . wwwselect-arc.com   Whatever your demanding application,fers just the rightSelectAlloy nickel alloy electrode toements. So discover for yourself why SelectAlloyom Select-Arc setd for welding excellence. Call 1-800-341-5215  or visit our c.com .  electrodes or solid wir  SelectAlloy 82-AP excellent resistance to pitting and stress-corrosion cracking making itideal for welding in desalination odes or solid wires. They include: SelectAlloy 82-AP – oersesistance to pitting and osion cracking making itideal for welding in desalination power generation equipment andpetr  SelectAlloy 625-AP weld deposit prresistance in harsh envir power generation equipment andpetroleum refining. SelectAlloy 625-AP  – the NiCrMo weld deposit provides corrosion esistance in harsh environments, – the NiCrMo For Info go to www.aws.org/ad-index  For Info go to www.aws.org/ad-index  For Info go to www.aws.org/ad-index  3 WELDING JOURNAL CONTENTS 54 Cladding Faces the Challenges of Oil and Natural Gas Drilling  Advice is offered on setting up a cladding operation to combat corrosion of oil and gas equipment WM. J. Hoffart 58 Technology Drives U.S. Heat Exchanger Resurgence Tube-to-tubesheet fabrication is being lured back to the homeland with technology and efficient performance M. Leska 64 Improving Aluminum Resistance Spot Welding in Automotive Structures  A new patented resistance welding electrode penetrates the oxides on aluminum to produce sound spot welds D. R. Sigler et al. 74 Maximizing Pipeline Welding Efficiency Technology to improve welding efficiency is described J. Nelson Welding Journal (ISSN 0043-2296) is publishedmonthly by the American Welding Society for$120.00 per year in the United States and posses-sions, $160 per year in foreign countries: $7.50per single issue for domestic AWS members and$10.00 per single issue for nonmembers and$14.00 single issue for international. AmericanWelding Society is located at 8669 Doral Blvd., Ste.130, Doral, FL 33166; telephone (305) 443-9353.Periodicals postage paid in Miami, Fla., and addi-tional mailing offices. POSTMASTER: Send addresschanges to Welding Journal, 8669 Doral Blvd.,Suite 130, Doral, FL 33166. Canada Post: Publi-cations Mail Agreement #40612608 Canada Re-turns to be sent to Bleuchip International, P.O. Box25542,London, ON N6C 6B2Readers of Welding Journal may make copies ofarticles for personal, archival, educational or research purposes, and which are not for sale orresale. Permission is granted to quote from arti-cles, provided customary acknowledgment of authors and sources is made. Starred (*) items excluded from copyright. Departments Editorial ............................4 Washington Watchword ..........6 Press Time News..................8 News of the Industry ............10 Aluminum Q&A ..................20 Brazing Q&A ......................24 Product & Print Spotlight ......26 AWS Financial Report ..........32 Coming Events....................80 Certification Schedule ..........84 Conferences ......................86 Society News ....................89 Tech Topics......................90 Guide to AWS Services ......111 Personnel........................112 American Welder Learning Track ................124 Fact Sheet......................130 Classifieds ......................135 Advertiser Index ................136  167-s Full Reality vs. Integrated Virtual Reality Training in Welding Virtual reality is shown to be an effective method of teaching when combined with traditional welder training R. T. Stone et al. 175 -s Sources of Variation in Ferrite Number Predictions vs.Measurements Chemical analysis variability is shown to be a critical factor in ferrite prediction D. J. Kotecki and Z. Zhang 182 -s Shunting Effect in Resistance Spot Welding Steels — Part 1: Experimental Study The most influential variables on shunting in resistance welding arepinpointed B. Wang et al. 190 -s Monitoring and Control of Penetration in GTAW andPipe Welding  A novel method is proposed that uses arc voltage to predict penetration based on the dynamic development of the weld pool  X. R. Li et al. Features Welding Research Supplement 545874 June 2013 • Volume 92 • Number 6   AWS Web site  www.aws.org On the cover: When using a mechanized pipe welding system such as the one shown here, the welder monitors and adjusts the weld through the use of the pendant by steering the welding arc left or right, while automatic height sensing  keeps the torch at the proper height. (Photo courtesy of Bug-O Systems, Canons- burg, Pa.) The American Welder  116 Ladder Safety: Staying Steady Common sense advice helps prevent accidents D. Francis 120 The Secret to Fusion Welding Success Thorough preparation can be the key to successful welding W. C. L  A  P LANTE
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