Hollow product, fluid processing system and joining method of hollow members.

摘要

A connecting portion ( 10 c) of a container ( 10 ) of a catalyst converter is formed with a joining portion ( 15 ) to be joined to a joining portion ( 16 ) of a flange member ( 11 ) by spinning working, and the joining portion ( 15 ) formed by the spinning working is joined to the joining portion ( 16 ) of the flange member ( 11 ) by friction welding. One of the connecting portion ( 10 c) of the container of the catalyst converter and the flange member ( 11 ) is extended so as to be disposed radially inward of the joining portions ( 15 ) and ( 16 ).