公开(公告)号：US20230390875A1

公开(公告)日：2023-12-07

申请号：US18032286

申请日：2021-10-28

申请人： POSCO Co., Ltd

发明人： Jae-Yik Lee ,  Kyu-Tae Han

IPC分类号： B23K37/053 ,  B23K31/00

CPC分类号： B23K37/0536 ,  B23K31/003 ,  B23K2101/06

摘要： The present invention relates to an apparatus for preventing welding distortion and a method for welding a pipe and a flange using same, the apparatus being capable of effectively reducing welding distortion of a flange, which occurs during welding with a pipe and improving economic efficiency and productivity. The apparatus for preventing the welding distortion comprises: at least one counterweight which is arranged to be in contact with one side of a flange that is to be welded to a pipe, and has a hollow portion therein; and a fastening tool which fixes the counterweight to the flange, wherein the hollow portion of the counterweight may accommodate a refrigerant.