公开(公告)号：US20220063019A1

公开(公告)日：2022-03-03

申请号：US17422914

申请日：2020-01-10

Applicant: SAIPEM S.P.A.

Inventor： Giorgio STEFANO ,  Davide ROSSIN

IPC: B23K26/211 ,  B23K26/282 ,  B23K26/342

Abstract: A first metal pipe is welded to a second metal pipe in a method of laying pipeline, for example from a pipe-laying vessel at sea. The metal pipes may have an outer diameter greater than 150 mm and a pipe wall thickness of greater than 15 mm. The first pipe and the second pipe are brought together prior to welding so as to sandwich a third type of metal material between the pipe ends. The thickness of the third type of material, immediately before welding may be between 0.05 mm and 2 mm. The third metal material is melted together with the metal material of the first pipe and the second pipe.