I claim the ornamental design for a flange wrench, as shown and described.
FIG. 1 is a perspective view of the flange wrench.
FIG. 2 is a front view of the flange wrench of FIG. 1;
FIG. 3 is a back view of the flange wrench of FIG. 1;
FIG. 4 is a left side view of the flange wrench of FIG. 1;
FIG. 5 is a right side view of the flange wrench of FIG. 1;
FIG. 6 is a top view of the flange wrench of FIG. 1; and,
FIG. 7 is a bottom view of the flange wrench of FIG. 1.
Broken lines illustrate text and other images and form no part of the claimed design.
The flange wrench is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.