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Narrow-Gap Improved Electroslag Welding for Bridges
FHWA Demonstration Project DP-102

Oregon Department of Transportation Maintenance Yard
October 13-15, 1998

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OCTOBER 13, 8:00 AM -- OCTOBER 15, NOON

SESSION 1 Registration and Introductions ---Bruce Johnson, Bridge Engineer, FHWA ---Krishna Verma, Welding Engineer, FHWA DEMONSTRATION WELD #1-(Introduction to NGI ESW) Executive Overview Introduction to electroslag welding Advantages/disadvantages (compared to other processes) Break Development of Narrow Gap Improved ESW ( NGI-ESW)

SESSION 2 Equipment Requirements Fluxes and Filler Metal Consumable Requirements Break Setup and Operation DEMONSTRATION WELD #2: (butt or transition weld) Summary and Discussion: Day 1

SESSION 3 Non Destructive Examination and Quality Assurance Operator controls and adjustments or "What to Do if" DEMONSTRATION Weld #3 (typical problems and real time adjustments) Break Weld Repair Mechanical Properties Distortion Discussion

SESSION 4 RECAP: Factors Affecting Quality of NGI-ESW Cost Comparison : NGI-ESW vs SAW DEMONSTRATION WELD #4 (Transition or butt) Vendor List : ESW Equipment Specifications for NGI-ESW Proposed for Bridge Welding Code Technical Support for NGI-ESW Break Workshop Summary: NGI-ESW Questions/Discussion Pass Out/Complete Questionnaire/Evaluation Acknowledgments