PIPE MATERIAL, METHOD OF MEASURING BENDING RADIUS OF PIPE MATERIAL, JIG USED THEREFOR, AND JIG SET

To provide a pipe material capable of easily measuring the bending radius of a curved portion of the pipe material, a method for measuring the bending radius of the pipe material, a jig used therefor, and a jig set.SOLUTION: A corrugated pipe 1 includes large diameter portions 10 and small diameter portions 20 arranged alternately, and bending radius measuring means. A second large diameter portion 10B of the pipe material 1 is provided between a first large diameter portion 10A and a third large diameter portion 10C. The bending radius measuring means comprises a first mark 100 on the first large diameter portion 10A, a second mark 200 on the second large diameter portion 10B, and a third mark 300 on the third large diameter portion 10C. The first mark 100, the second mark 200, and the third mark 300 are arranged in a straight line when the pipe material 1 is bent so that the bending radius of the central axis of the pipe material 1 becomes a predetermined value S.SELECTED DRAWING: Figure 1 【課題】管路材の湾曲部位の曲げ半径を簡単に測定できる管路材、管路材の曲げ半径の測定方法、それに用いられる治具および治具セットを提供する。【解決手段】大径部１０と小径部２０とが交互に設けられ、曲げ半径測定手段を備えた波形の管路材１。管路材１の第２の大径部１０Ｂは、第１の大径部１０Ａと第３の大径部１０Ｃとの間にある。曲げ半径測定手段は、第１の大径部１０Ａの第１マーク１００と、第２の大径部１０Ｂの第２マーク２００と、第３の大径部１０Ｃの第３マーク３００とから構成されている。管路材１の中心軸の曲げ半径が所定値Ｓとなるように管路材１を湾曲させたとき、第１マーク１００、第２マーク２００および第２マーク３００は直線上に並ぶ関係を有する。【選択図】図１