| 摘要 |
PROBLEM TO BE SOLVED: To provide a branch opening closing method by which a branch is effectively utilized and accumulation of a fluid in the branch is prevented.SOLUTION: A branch opening communicating method can communicate a branch opening 12b of a branch 12, which is closed by a closing body 3, in an uninterrupted flowing state in a casing 2 having the branch 12 for communicating with a drilled hole Q mounted in a tightly sealed state on a fluid pipe 1 having the drilled hole Q. A case 35 communicating with the branch 12 is tightly mounted. After the closing body 3 is removed through the case 35, a closing body 4 having a communicating hole 4a communicating with an inside and outside of the branch 12, in place of the closing body 3, is mounted so that an abutting part on the branch 12 is in a tightly sealed state through the case 35. Thus, a connection member 6 for opening and closing the communication hole 4a can be mounted on the communication hole 4a. |
