| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a flange structure wherein bolt holes of a flange and a packing are easily positioned, displacement of the packing causing uneven fastening is prevented when fastening the flange, and sealing leakage is made hard to occurr. SOLUTION: This flange is provided with recessed grooves or projected ridges in parallel with a thickness direction of a flange collar portion at an intersecting position of lines connecting a flange collar center and a bolt hole center on a flange collar portion outer peripheral side surface. In the packing, a locking collar having inner diameter generally same as the outer diameter of the flange collar portion is projected generally orthogonal to a surface abutting on the flange, and projected ridges or recessed grooves engaged with the recessed grooves or the projected ridges provided on the flange are provided at an intersecting position of lines connecting a packing center and the bolt hole center on a surface abutting on the flange collar portion outer peripheral side surface of the locking collar. The locking collar of the packing is fitted in the flange collar portion outer peripheral side surface, and the recessed groove or the projected ridges provided on the flange collar portion are engaged with the projected ridges or the recessed grooves of the packing, thereby matching the bolt holes of the flange and the packing.</p> |
