| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a boring device for branching, which enables a boring machine to be accurately fixed without making the center of a base flange deviate from that of a flange, and which can accurately bore a branch port.SOLUTION: A boring device for branching includes: a casing 12 that comprises a communication part 13, an on-off valve 14 and a flange 16 and that covers a fluid pipe 1; a base flange 20 for mounting a boring machine 40; an auxiliary flange 30 that is arranged with the flange 16 between itself and the base flange 20; and a fastening member 24 for fastening the base flange 20 and the auxiliary flange 30 together on a radial outside with respect to the flange 16.</p> |
