Pipe expansion method

F - Mech Eng,Light,Heat,Weapons – 28 – F

Patent

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Details

F28F 9/16 (2006.01) B21D 39/08 (2006.01) B21D 39/10 (2006.01) F28D 7/16 (2006.01)

Patent

CA 2655430

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.

L'invention concerne un procédé de dilatation de tuyau permettant de réduire une plage d'inspection (région) d'un tuyau de transfert thermique fixé à une plaque de tuyau et de raccourcir le temps requis pour l'inspection. Dans le procédé de dilatation de tuyau, le tuyau de transfert thermique (13) introduit dans un trou de tuyau (3a) de la plaque de tuyau (3) est fixé par expansion de tuyau. La surface de circonférence externe du tuyau de transfert thermique (13) est collée à la surface de circonférence interne du trou de tuyau (3a), sur une surface d'extrémité d'un côté primaire à une surface d'extrémité sur un côté secondaire de la plaque de tuyau (3). Ensuite, dans une plage de distance prescrite du voisinage de la surface d'extrémité sur le côté secondaire ou de la surface d'extrémité sur le côté secondaire à la surface d'extrémité sur le côté primaire, une pression de surface entre le tuyau de transfert (13) et la plaque de tuyau (3) est en outre accrue.

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