While most helium is transported as bulk liquid to the very large volume customers and to transfill and redistribution depots, U.S. industrial gas distributors deliver to the small and medium volume end users in a wide variety of smaller containers:
High-pressure steel cylinders containing 10 to 300 cf of gaseous helium;
High-pressure tube trailers containing 30,000 to 180,000 cf of gaseous helium;
Dewars containing 50 to 500 L of liquid helium; and
A variety of specialized containers for gaseous and liquid helium for specific applications.
Figure 2.4 illustrates some of the many storage containers in which liquid and gaseous helium are delivered to end users.