To provide a new flanged pipe structure which can be connected to another pipe with simple operation, and to provide a pipe line structure comprising the flanged pipe connected to another pipe.
This flanged pipe structure 1 comprises a pipe 2 to which a flange coupling 3, in which a flange part 32 is provided on the outer peripheral surface of a short pipe 31, is connected. A tapered part 313, whose diameter increases from one open end 312 toward the other open end 311, is provided on the inner peripheral surface of the short pipe 31 in the flange coupling 3. A tubular core member 4, which is provided with a short pipe abutting part 43 formed on its outer peripheral surface, is press-fitted into a circular gap existing between the outer peripheral surface of the pipe 2 inserted into the short pipe 31 and the tapered part 313.
MORITAKE HIROSHI
IWAI HIDEO
SASAYAMA MICHIAKI
