What is a small tank used for? It is mainly used for transporting heavy objects or large equipment. Small tanks are compact in size and usually come in groups of four or more. There are many types of small tanks: straight-line transport small tanks, universal transport small tanks, steering transport small tanks, and tracked transport small tanks. A 100-ton small tank has an alloy steel body that is strong, durable, and sturdy. The wheels are mostly steel wheels with good load-bearing capacity. In terms of tonnage selection, the specifications of small tanks generally indicate their carrying capacity per group of four; for example, a 100-ton small tank can carry a total weight of 100 tons when used in groups of four.