DIFFERENT DIAMETER PIPE CONNECTING STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a connecting structure capable of connecting piping materials having the different apertures to each other by one integrated seal packing. SOLUTION: A cap nut 2 is rotatably fastened to a collar 11 of a flexible pipe 1 (the aperture is l/2) on the small diameter side, and an external thread 31 is formed on a piping material 3 (the aperture is 3/4) on the large diameter side. An internal thread 21 having the same specification is formed on the cap nut 2 so as to be screwed to the external thread 31 of the piping material 3 on the large diameter side. A packing 41 (the aperture is 1/2) is formed as a small-diameter side sealing part on one surface of an annular seal body 4, and a packing 42 (the aperture is 3/4) is provided as a large-diameter side sealing part on the other surface.