| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint structure of resin pipe capable of performing visual confirmation of a standard tightening position of a fastening means where a seal member between joint flanges exhibit seal function from an external part and, moreover, capable of performing further tightening by means of the fastening means at need.SOLUTION: An annular storage groove 6 is formed on a joint flange 1b of one side resin pipe and a seal member 7 is stored in the storage groove 6. A contact surface 11 is disposed on a joint flange 2b of the other side resin pipe. The joint flanges 1b, 2b are fastened to each other by a bolt 3 and a nut 4. A shield wall 9 is provided on the joint flange 1b. Protrusion height of the shield wall 9 is set such that visual confirmation of the seal member 7 from an outer side in the radial direction is shielded when a contact surface 11 is displaced to a standard seal position. The maximum displacement amount in the tightening direction of the joint flanges 1b, 2b is set as such an amount as to overlap with the joint flange 2b in the axial direction after the shield wall 9 shields the visual confirmation of the seal member 7. |
