The ornamental design for a leak catching pipeflange, as shown and described.
FIG. 1 is a perspective view of a leak catching pipe flange showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a left side view thereof; and,
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is another perspective view thereof; and,
FIG. 9 is a sectional view thereof showing the internal drain and pipe seating structures visible from the open top and bottom of the device, taken along line 9-9 as shown in FIG. 6.