We claim the ornamental design for a pipe hold down device, as shown.
FIG. 1 is a perspective view of the pipe hold down device showing our new ornamental design;
FIG. 2 is a front elevational view;
FIG. 3 is a right side elevational view;
FIG. 4 is a top plan view;
FIG. 5 the left side elevational view;
FIG. 6 is a bottom plan view; and,
FIG. 7 is a rear elevational view.
The broken lines shown throughout the views, which are immediately adjacent to the shaded areas and define unshaded regions, represent the bounds of the claimed design, while all other broken lines are directed to environment and are for illustrative purposes only. The broken lines and the unshaded regions form no part of the claimed design.