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Roussel, E. P.

Paper Title Page
WEPD043 Orbital Welding of QRL Line in Confined Environment 2509
 
  • E. P. Roussel
    Air Liquide, Sassenage
  • P. J.D. P. Mazoyer
    ORBITAL, Vonnas
 
  AIR LIQUIDE DTA was in charge of design, manufacturing of element and installation of QRL line of CERN. The elements of this cryogenic line have been welded by orbital welding with an open weld head. A specific welding head has been developed for the project. Radial and axial clearances lead the design of the head. To install this cryogenic line, more than 15 000 orbital welds have been realized. This paper will present the technical requirements applicable to QRL line, different welding configuration, main step to qualify welding process. We will describe the results of non destructive examination: helium leak test, X-ray inspection and visual inspection.