The ornamental design for a tank for gaseous or liquid substances, as shown and described.
FIG. 1 is a right side elevation view of a tank for gaseous or liquid substances.
FIG. 2 is a bottom plan view of the tank of FIG. 1.
FIG. 3 is a front elevation view of the tank of FIG. 1.
FIG. 4 is a top plan view of the tank of FIG. 1.
FIG. 5 is a left side elevation view of the tank of FIG. 1.
FIG. 6 is a rear elevation view of the tank of FIG. 1.
FIG. 7 is a front, right perspective view from above of the tank of FIG. 1; and,
FIG. 8 is a rear, left perspective view from above of the tank of FIG. 1.
The broken lines showing the bottom of the tank for gaseous or liquid substances are for the purpose of illustrating environmental structure and form no part of the claimed design.