| 摘要 |
PURPOSE: A tube fitting structure in which the amount of fastening a nut is provided to enable accurate confirmation of the fitting state because a discrimination ring is left on a body. CONSTITUTION: A tube fitting structure comprises a tube(200), one or more ferrules(300), a nut(400), a check ring(500), and a discrimination ring. The ferrules are inserted to the exterior of the tube. The nut induces the deformation of the ferrules to seal the tube. When the nut is turned to a body(100) within a designated range, the fastened nut is released and removed from the body. The discrimination ring is inserted into a check ring. When the check ring is removed from the body, the fastening state of the nut is checked by the discrimination ring left on the body. |
