Plug of Pipe Joint

FIG. 1 is a perspective view of a plug of pipe joint showing our new design;

FIG. 2 is a front view thereof, the rear view being a mirror image of the front view, the top view and the bottom view being identical to the front view;

FIG. 3 is a left side view thereof; and,

FIG. 4 is a right side view thereof.

The dash broken lines illustrate portions of the plug of pipe joint that form no part of the claimed design. The dot-dash broken lines illustrate the boundary of the claimed design and form no part thereof.