The capacity, size, and shape of the storage barrel, which is suitable for the storage of powder or granules and other materials,are all customized to meet the costumers’ needs. It can be used in conjunction with pneumatic conveyor system/air delivery equipment. It can be optionally equipped with material-level sensors, a pneumatic bridge-destroyer, maintenance hatch, ladder guardrail and maintenance platform. It can also either cool or preserve heat by introducing cold air or increase electrical heating.