公开(公告)号：US11660711B2

公开(公告)日：2023-05-30

申请号：US16433389

申请日：2019-06-06

Applicant: United Technologies Corporation

Inventor： Pawel Kaniowski ,  Piotr Kaczor ,  Robert Wozniak ,  Wangen Lin ,  Christopher A. Sanchez

IPC: B23K37/053 ,  B23K37/02 ,  B23K9/16 ,  B23K9/028 ,  B23K9/00 ,  B23K101/04

CPC classification number: B23K37/0536 ,  B23K9/0026 ,  B23K9/0282 ,  B23K9/0288 ,  B23K9/16 ,  B23K37/027 ,  B23K37/0276 ,  B23K2101/04

Abstract: A process of welding fittings to ends of a double wall pipe comprising forming a first welded joint between an inner pipe and an inner receiver of a first fitting; forming a second welded joint between an outer pipe and an outer receiver of the first fitting; forming a third welded joint between the outer pipe and an outer receiver of a second fitting; and forming a fourth welded joint between the inner pipe and an inner receiver of the second fitting.