Hybrid Laser/GMAW of High Strength Steel Gas Transmission Pipelines

The project aims to develop innovative hybrid Yb-Fiber Laser and GMAW process and technologies for pipeline girth welding and to demonstrate the system under field conditions. ID root pass welding with GMAW will be the baseline with external hybrid root pass welding techniques developed for variations of laser power and root face thickness since this combination has the greatest potential to meet existing pipeline integrity requirements and facilitate the use of new and existing Yb-Fiber Laser GMAW hot and fill pass techniques. Advanced automation will be used to improve and develop root and fill pass processes, and for attainment of mechanical property requirements. In a consortium project offered for match requirements via a Group Sponsor Project (GSP) that is about to start at Edison Welding Institute (EWI), an integrated LBW/GMAW system based on a commercial bug and track system will be built, and will be used in this project to develop hybrid LBW/GMAW parameters for girth welds in X100 pipe.


  • English


  • Status: Completed
  • Contract Numbers:


  • Sponsor Organizations:

    Pipeline and Hazardous Materials Safety Administration

    U.S. Department of Transportation
    East Building, 2nd Floor 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Merritt, James

  • Performing Organizations:

    Edison Welding Institute

    1250 Arthur E Adams Drive
    Columbus, OH  United States  43221-3560
  • Principal Investigators:

    Fiore, Susan

  • Start Date: 20070701
  • Expected Completion Date: 0
  • Actual Completion Date: 20100501
  • Source Data: RiP Project 35335

Subject/Index Terms

Filing Info

  • Accession Number: 01493745
  • Record Type: Research project
  • Source Agency: Department of Transportation
  • Contract Numbers: DTPH56-07-T-000003
  • Files: RiP
  • Created Date: Sep 21 2013 1:00AM