The ornamental design for a cart for weldingtanks, as shown and described.
FIG. 1 is a side elevational view of a cart for welding tanks showing my
new design, the broken line illustration of tank is for illustrative
purposes only and forms no part of the claimed design;
FIG. 2 is a front elevational view of the cart with the tanks removed.
FIG. 3 is a rear elevational view of the cart similar to FIG. 2; and,
FIG. 4 is a top plan view of the cart, as shown in FIG. 1.