To provide a connection structure and a connection method for two pipe bodies having different diameter.
In this connection structure of pipe bodies, arrangement in the radial direction of through holes 420a, 120a' of flange members 420, 120' of first pipe bodies 400, 400', 400" and the second pipe body 100' having smaller diameter than that of the first pipe bodies is positioned between diameter A of the first pipe bodies and diameter B of the second pipe body, tightening member holding members 440, 440', 440" for positioning and holding a tightening member 1 in advance while it corresponds to the through hole 420a substantially are provided at predetermined positions, and both of the first flange member 420 and the second flange member 120' can be tightened by moving the tightening member 1 to a common insertion position by operation from the opposite side to a butting side of the second flange member when the first and second flange members are butted.
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Shigeru Sakuma
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