| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent erroneous mounting of a heater at a mounting position by mounting a heater flange having the heater at a tank flange with a plurality of bolts, and asymmetrically providing mounting positions of the bolts. SOLUTION: When a heater flange 7 is mounted at a tank flange 6 and bolts 9 provided at the flange 7 are clamped through a circular packing 10, mounting holes of the bolts 9 are provided at six positions at the flange 7. The first to sixth bolt mounting holes 11a to 11f are constituted at the flange 7, the fifth hole 11e of the holes 11a to 11f is slightly deviated down from a line for connecting a center 0 of the flange 7 to a center of the second hole 11b so that the positions of the holes become asymmetrical as a whole. Thus, erroneous mounting of the heater 8 at the mounting position can be prevented.</p> |
