PIPE EXPANDING METHOD

摘要

Provided is a pipe expanding method by which an inspection range (region) of a heat transfer pipe fixed to a pipe plate can be reduced and a time required for the inspection can be shortened. In the pipe expanding method, the heat transfer pipe (13) inserted into a pipe hole (3a) of the pipe plate (3) is fixed by pipe expansion. The outer circumference surface of the heat transfer pipe (13) is adhered to the inner circumference surface of the pipe hole (3a), over an end surface on a primary side to an end surface on a secondary side of the pipe plate (3). Then, within a range of a prescribed distance from the vicinity of the end surface on the secondary side or that of the end surface on the secondary side to the end surface on the primary side, a surface pressure between the transfer pipe (13) and the pipe plate (3) is further increased.