A drum (also called a barrel) is a cylindrical shipping container used for shipping bulk cargo. Drums can be made of steel, dense paperboard (commonly called a fiber drum), or plastic, and are generally used for the transportation and storage of liquids and powders. Drums are often stackable, and have dimensions designed for efficient warehouse and logistics use. This type of packaging is frequently certified for transporting dangerous goods. Proper shipment requires the drum to comply with all applicable regulations

Steel drums

Steel drums are ubiquitous industrial shipping containers. They are manufactured from sheets of cold rolled steel formed into a tube and welded along the side seam. Stainless steel, nickel, and special alloys are occasionally used. The bottom head is permanently attached by the manufacturer. Two primary options are available for the top head:

• Open head drum, removable head drum: Top head is attached after filling with a closing ring and bolted lock. Liquids, granular solids and waste are commonly shipped in these.
• Tight head drum, closed head drum, non-removable head drum: The top head is permanently attached by the manufacturer. It is usually made with one or two threaded access fittings, closed by threaded bungs after filling. Liquids are suited to these drums.