PROBLEM TO BE SOLVED: To provide a pipe capable of achieving an efficient flow within the pipe and to provide a method for manufacturing the pipe.SOLUTION: In the pipe, at least two branch pipes 2 and 3 formed of flexible material are joined to one main pipe 1 formed of flexible material via a joint part 4, and joined to each other at a predetermined branching angle. Each of the joint surfaces of the branch pipes joined to the joint part is orthogonal to the central axis of the branch pipe. When a part, to which the pipe walls of the opposed branch pipes are joined, is set as a first crotch part, the joint part comprises a second crotch part that is configured by extending the first crotch part by a predetermined distance into the joint. The pipe is manufactured by using one straight circular pipe for forming the main pipe and at least two straight circular pipes for forming the branch pipes.SELECTED DRAWING: Figure 1BCOPYRIGHT: (C)2017,JPO&INPIT【課題】効率のよい管内流れを実現できる管及びその製造方法を提供する。【解決手段】管は、可撓性を有する材料によって形成された1本の主管1に可撓性を有する材料によって形成された少なくとも2本の枝管2、3が接合部4を介して接合し、かつそれらの枝管同士が所定の分岐角度で接合している。接合部に接合される枝管の接合面はいずれも当該枝管の中心軸に直交しており、対向する枝管の管壁が接合する部分を第1の股部とする場合に、接合部は第1の股部を接合部内に向けて所定距離延長した第2の股部を備える。管は、主管形成用の1本の直円管と枝管形成用の少なくとも2本の直円管とを用いて製造する。【選択図】図1B
