ORBITAL WELDING SPEEDS RISER CONSTRUCTION OF OFFSHORE PLATFORMS

  • Arc Machines' orbital pipe welding equipment was the answer for Haugesund Mekaniske Versted, one of Norway's leading construction yards, in a recent riser construction project.  
  • These materials required very precise control of the welding thermal cycle in order to retain their favorable mechanical properties after welding. 
  • Weld quality was high with a failure rate of only 1.5% on the AISI 4130.
  • The maximum allowable shrinkage was 0.5 mm in a 15-m line, which was easily accomplished.
  • Haugesund Mekaniske Versted made a total of 574 welds on the riser project
  • Including 287 on the 3-in. pipe and 287 on the 7-in. pipe with AMI's Model 15 and Model 81 weld heads.

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